CN217716564U - Liquid level detection device and household equipment provided with same - Google Patents
Liquid level detection device and household equipment provided with same Download PDFInfo
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- CN217716564U CN217716564U CN202221841669.XU CN202221841669U CN217716564U CN 217716564 U CN217716564 U CN 217716564U CN 202221841669 U CN202221841669 U CN 202221841669U CN 217716564 U CN217716564 U CN 217716564U
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Abstract
The utility model discloses a liquid level detection device and install this detection device's domestic equipment, this liquid level detection device includes: the heating module and the temperature detection module; the heating module is arranged at a preset liquid level, and the preset temperature of the heating module is higher than the temperature of the liquid to be measured; the temperature detection module is used for detecting whether the actual temperature of the heating module is lower than a preset temperature. The home appliance includes: the liquid level detection device. The actual temperature of the heating module at the preset liquid level is measured by the temperature detection module, so that the liquid amount can be fed back accurately and timely; the liquid level detection device can be applied to liquid level detection of various density liquids such as water, oil and the like, is not limited by the conductive capacity of the liquid, and has the advantages of small number of used elements, simple structure, easy realization and lower production cost.
Description
Technical Field
The utility model relates to a liquid level detection field especially relates to a liquid level detection device and install this detection device's domestic equipment.
Background
In some devices used in factories and households, oil or water is often used as a working medium, and is reduced to different degrees due to evaporation and volatilization along with the progress of work, and when the liquid level of the oil or water in the devices is lower than a certain position, the devices cannot work safely, so that a liquid level detection device needs to be installed in the devices so as to add corresponding liquid into the devices when the liquid level is detected to be lower than the limit liquid level for allowing work, thereby ensuring the normal work of the devices. As household electrical appliance equipment, such as a steam box and a steaming and baking integrated machine, in order to ensure normal use of a steaming function, a liquid level detection device needs to be arranged in a water tank of the equipment, and the water level in the water tank is guaranteed to be higher than a limit liquid level all the time. The water level detection in steam cooking equipment generally adopts a floating ball type liquid level meter, a water level probe or a dry spring type liquid level meter.
The float-type liquid level meter is designed based on the principle of buoyancy and static magnetic field, and utilizes the change of magnet in the float ball along with the liquid level to change the voltage-dividing circuit formed from resistor and magnetic spring switch in the body rod so as to convert it into voltage-dividing signal, and said voltage-dividing signal can be changed into standard industrial signals of 4-20mA, etc. by means of liquid level meter to detect liquid level. The floating ball is easy to be blocked and does not move. The floater type level gauge service environment has some restrictions, and sticky liquid and impurity all can lead to the floater card to die unable action, lean on the float to detect the liquid level according to the up-and-down motion that the change of liquid level produced, and the operation is simple, but detects the precision and hang down, and the liquid level detection precision is at more than or equal to 3mm.
The water level probe measures the water level by utilizing the difference of the electrical conductivity of steam and water, and the electrical conductivity of water is large, so that the resistance is small; the steam has small conductivity and large resistance, and whether the detection point is in water can be judged according to the difference of the resistance values of the probes in the circuit. The level probe cannot be used to detect non-conductive levels, such as: gasoline, diesel oil, heavy oil and the like, and accordingly, when impurities such as grease and the like appear in water, the detection precision of the water level probe is also influenced.
A set of reed switch and precision resistor are installed in the main duct of the reed type liquid level meter. When the magnetic floater outside the tube changes up and down along with the liquid level, the dry springs positioned at the liquid level in the main guide tube are sequentially connected to change the resistance value of the sensor, and the conversion circuit module in the junction box converts the resistance value into 4-20mA current to be output. The dry spring type liquid level meter can carry out precise liquid level detection, but has more practical elements and higher cost.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model aims to provide a liquid level detection device to whether can accurately detect various liquid level height and be higher than minimum liquid level, use the component few, it is with low costs.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a liquid level detecting device comprising: the heating module and the temperature detection module;
the heating module is arranged at a preset liquid level, and the preset temperature of the heating module is higher than the temperature of the liquid to be measured;
the temperature detection module is used for detecting whether the actual temperature of the heating module is lower than a preset temperature.
Further, the temperature detection module detects the temperature of the heating module through heat conduction.
Further, the liquid level detection device further comprises a heat conduction support, and the heating module and the temperature detection module are both in contact with the heat conduction support for heat conduction.
Further, the heat conducting support surrounding the outer surfaces of the heating module and the temperature detection module clamps and fixes the heating module and the temperature detection module.
Further, the lowest point of the temperature detection module is higher than the lowest point of the heat generation module.
Further, the heating module is fixed to a preset liquid level.
Further, the method also comprises the following steps: the liquid container comprises a container cover of a liquid container, wherein the liquid container is used for storing liquid to be detected; the temperature detection module and the heating module are fixedly connected with the box cover.
Further, the liquid level detection device still includes drive module, drive module is used for the drive the module that generates heat removes to predetermineeing liquid level department from being higher than predetermineeing liquid level department.
Further, the heating module is located in the center of a preset liquid level.
The utility model discloses a liquid level detection device during operation, the module that generates heat is arranged in and is predetermine liquid level department, and the module that generates heat predetermines the temperature and be higher than the liquid temperature that awaits measuring, and when the liquid level height that awaits measuring is higher than predetermine the liquid level, the module that generates heat soaks in the liquid that awaits measuring, and the liquid that awaits measuring has the cooling action to the module that generates heat, and the actual temperature that the temperature detection module recorded is less than the module that generates heat predetermines the temperature, explains that the liquid volume is sufficient; when the liquid level height of the liquid to be detected is lower than the preset liquid level, the heating module is positioned above the liquid, and the actual temperature measured by the temperature detection module is greater than or equal to the preset temperature of the heating module, which indicates that the liquid amount is less and the liquid needs to be supplemented. The actual temperature of the heating module at the preset liquid level is measured by the temperature detection module, so that the liquid amount can be fed back accurately and timely; the liquid level detection device can be applied to liquid level detection of various density liquids such as water, oil and the like, is not limited by the conductive capacity of the liquid, and has the advantages of small number of used elements, simple structure, easy realization and lower production cost.
The utility model also provides a household appliance, include: the liquid level detection device.
Further, the household equipment also comprises a box cover buckled at the opening of the liquid containing box, and a joint is installed; the box cover is provided with a mounting hole, the heating module and the temperature detection module are inserted and fixed to one end of the mounting joint, and the mounting joint is fixed in the mounting hole.
Further, a lead wire inserted from the other end of the mount joint is connected to the heat generating module and the temperature detecting module, respectively.
Further, the wire is also connected with a connector for connecting an external power supply.
Further, a communication port communicated with the liquid containing tank is formed in the tank cover.
The utility model discloses an installed among the domestic appliance the utility model discloses a liquid level detection device detects the liquid level through this liquid level detection device, in time learns whether need supply liquid to the domestic appliance in.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a disassembled structure of a liquid containing tank 20 and a liquid level detecting device 10 mounted on a tank cover 30 in a household appliance according to an embodiment of the present invention;
fig. 2 is a schematic view of another posture structure of the liquid level detecting device 10 in this embodiment.
Icon: 10-liquid level detection device; 11-a heat-generating module; 12-a temperature detection module; 13-a thermally conductive holder; 20-liquid containing box; 30-a box cover; 31-a communication port; 40, installing a connector; 50-a wire; 60-connector.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to explain the technical solutions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example 1
As shown in fig. 1 to 2, the present embodiment provides a liquid level detecting device including: a heating module 11, a temperature detection module 12;
the heating module 11 is arranged at a preset liquid level, and the preset temperature of the heating module 11 is higher than the temperature of the liquid to be measured;
the temperature detecting module 12 is configured to detect whether an actual temperature of the heat generating module 11 is lower than a preset temperature.
When the liquid level detection device works, the heating module 11 is arranged at a preset liquid level, the preset temperature of the heating module 11 is higher than the temperature of liquid to be detected, when the liquid level of the liquid to be detected is higher than the preset liquid level, the heating module 11 is soaked in the liquid to be detected, the liquid to be detected has a cooling effect on the heating module 11, and the actual temperature detected by the temperature detection module 12 is lower than the preset temperature of the heating module, so that the liquid amount is sufficient; when the liquid level of the liquid to be measured is lower than the preset liquid level, the heating module 11 is located above the liquid, and the actual temperature measured by the temperature detection module 12 is greater than or equal to the preset temperature of the heating module 11, which indicates that the amount of the liquid is less and the liquid needs to be supplemented. The actual temperature of the heating module 11 at the preset liquid level is measured through the temperature detection module 12, so that the liquid amount can be fed back accurately and timely; the liquid level detection device can be applied to liquid level detection of various density liquids such as water, oil and the like, is not limited by the conductive capacity of the liquid, and has the advantages of small number of used elements, simple structure, easy realization and lower production cost.
It should be noted that, the heating module 11 of the present invention may be a heating module that heats after mixing chemical materials, or a heating module that heats after phase change materials under specific use conditions, and the heating module 11 in this embodiment adopts an electrothermal heating manner that is relatively easy to implement; the utility model discloses a temperature detect module 12 can be mercury formula thermometer, and the temperature detect module 12 of this embodiment adopts temperature sensor, for example, platinum resistance formula temperature sensor or hall temperature sensor. The utility model discloses a predetermine the liquid level can be the limit liquid level of guaranteeing normal work (when the liquid level that awaits measuring is less than this limit liquid level promptly, can't guarantee normal work), also can be other high liquid levels that technical staff in the field chose in order to guarantee operational reliability.
The temperature detection module 12 of the present embodiment detects the temperature of the heat generation module 11 by thermal conduction.
The heating module 11 can transfer heat to the temperature detection module 12 through radiation, convection and contact heat conduction, and the present embodiment uses the contact heat conduction heat transfer mode as an example to introduce the utility model discloses a liquid level detection device.
The liquid level detection device of this embodiment further includes a heat conduction bracket 13, and the heating module 11 and the temperature detection module 12 are both in contact with the heat conduction bracket 13 for heat conduction. It should be noted that the heat generating module 11 and the temperature detecting module 12 may be in direct contact; the heat conducting support 13 may also be in indirect contact with each other, that is, the heat generating module 11 and the temperature detecting module 12 are not in contact with each other, and the heat conducting support 13 is in contact with both the heat generating module 11 and the temperature detecting module 12.
Preferably, the heat conducting bracket 13 surrounding the outer surfaces of the heat generating module 11 and the temperature detecting module 12 clamps and fixes the heat generating module 11 and the temperature detecting module 12.
Referring to fig. 1 to 2, the heating module 11 of the present embodiment is a rod-shaped structure, and is close to one end of the heating module 11 disposed at a predetermined liquid level, the heat conducting bracket 13 fixes the ends of the heating module 11 and the temperature detecting module 12, and specifically, the heat conducting module 13 is wound around the outer surfaces of the heating module 11 and the temperature detecting module 12, and clamps and fixes the two. In order to satisfy the requirement of good heat conduction between the liquid, the heat generating module 11 and the temperature detecting module 12, the heat conducting bracket 13 is made of a good heat conductor material.
The temperature detection module 12 of this embodiment is the lowest point higher than the lowest point of the module 11 that generates heat, compare in the module 11 that generates heat and the scheme that temperature detection module 12 all arranged in and predetermine the liquid level setting with temperature detection module, the liquid level height of the liquid that awaits measuring falls to the shorter period of predetermineeing below the liquid level height, the temperature detection module 12 of arranging in and predetermineeing liquid level department can be stained with the liquid drop, the actual temperature that leads to this moment to record is less than the module 11 preset temperature that generates heat, bring the measuring error in the shorter period, and be higher than the temperature detection module 12 of predetermineeing liquid level department setting and then left the time that its liquid drop driped and dried by distillation, reduce measuring error.
Preferably, referring to fig. 2, when the liquid level detection device works, the heating area S of the heating module 11 is disposed at the preset liquid level, and the temperature sensing element of the temperature detection module 12 is in contact connection with the heating area S of the heating module 11, so that the heating area S of the heating module 11 can be in contact with liquid and can timely transmit the temperature of the heating area S to the temperature detection module 12, the heat of the heating area S is fully utilized, and the temperature consumption of the heating module 11 is reduced.
It should be noted that the heat generating module 11 of the present embodiment is fixed at a preset liquid level, and specifically, the liquid level detecting apparatus of the present embodiment may further include: a liquid containing tank 20 and a tank cover 30; the tank cover 30 is mounted on the port of the liquid containing tank 20, wherein the liquid containing tank 20 is used for storing liquid to be measured; the temperature detection module 12 and the heating module 11 are both fixedly connected with the box cover 30. When the box cover 30 is fastened to the port of the liquid containing box 20, the heating module 11 extends into the inner cavity of the liquid containing box 20, which is equivalent to fixing the heating module 11 to the preset liquid level of the liquid containing box 20.
The heating module 11 of this embodiment can also set to movable, when needing to carry out liquid level detection, will generate heat module 11 and remove to predetermineeing liquid level department, specifically, the liquid level detection device of this embodiment can also include drive module, and drive module is used for driving heating module 11 and removes to predetermineeing liquid level department from being higher than predetermineeing liquid level department, and wherein, drive module can adopt drive modes such as pneumatic drive, hydraulic drive or motor drive.
The heating module 11 of this embodiment is located at the center of the preset liquid level. When detecting the liquid level height, reduce the influence of flourishing liquid tank 20 tank wall that holds the liquid that awaits measuring to the actual temperature that generates heat of module 11 that generates heat.
The fixed or movable mounting of the heat generating module 11 can be selected by those skilled in the art according to the use requirements.
In this embodiment, when the liquid level of the liquid to be measured is lower than the preset liquid level, the liquid level detection device is located above the liquid. The actual temperature of the heating module 11 is prevented from being influenced by the heat conduction effect of each component on the liquid level detection device after the liquid cools other parts of the liquid level detection device except the heating module 11.
In the present embodiment, the heat generation module 11 using electric heating and the temperature detection module 12 using a temperature sensor are connected to an external power supply, respectively. Namely, the heating module 11 consumes electric energy for heating, and the temperature detecting module 12 is powered by an external power supply.
Example 2
As shown in fig. 1 to 2, the present embodiment provides a home appliance including: the liquid level detection apparatus 10 in embodiment 1.
The household appliance of the embodiment is provided with the liquid level detection device of the embodiment 1, and the liquid level detection device is used for detecting the liquid level and timely knowing whether the liquid needs to be supplemented into the household appliance.
The household appliance of the present embodiment further includes a liquid tank 20 containing liquid; the heating module 11 is arranged at the preset liquid level of the liquid containing tank 20.
By detecting the liquid level in the liquid containing tank 20, it is known in time whether the liquid needs to be replenished into the liquid containing tank 20.
Preferably, the heat generating region S of the heat generating module 11 is disposed at a preset liquid level of the liquid containing tank 20.
It should be noted that the liquid level detection device 10 may be fixed in the liquid containing tank 20, so that the heating module 11 is always at a preset liquid level of the liquid containing tank 20; the household appliance can further comprise a control device and a driving device which are used for controlling and driving the liquid level detection device 10, when the liquid level of liquid in the liquid containing box 20 needs to be detected (the household appliance can be in a use state and can also be in a non-use state), the heating module 11 is arranged at the preset liquid level through the control device, in order to ensure that the heating module 11 is accurately arranged at the preset liquid level, the position where the liquid level is arranged can be preset, a limiting structure of the driving device is arranged, or a sensor is arranged at the preset liquid level of the liquid containing box 20, the sensor can feed back signals to the control device, when the heating module 11 is arranged at the preset liquid level, the control device controls the driving device to stop driving the liquid level detection device 10 according to the feedback signals of the sensor.
The heating household equipment of the embodiment also comprises a box cover 30 buckled at the opening of the liquid containing box 20, and a mounting joint 40; the box cover is provided with a mounting hole, the heating module 11 and the temperature detection module 12 are inserted and fixed to one end of the mounting joint 40, and the mounting joint 40 is fixed in the mounting hole.
The heating module 11 and the temperature detection module 12 are fixed on the tank cover 30 through the mounting joint 40, so that the liquid level detection device 10 can be loaded into the liquid containing tank 20 when the tank cover 30 is mounted, and the mounting height of the heating module 11 is ensured to be consistent with the preset liquid level height of the liquid containing tank 20.
The lead 50 inserted from the other end of the mounting connector is respectively connected with the heating module 11 and the temperature detection module 12, and the different leads 50 are used for supplying power to the heating module 11 and the temperature detection module 12, because the heating module 11 consumes more electric energy due to heating, the wire diameter of the lead connected with the heating module 11 is thicker, and a person skilled in the art can determine the current for supplying power to the heating module 11 according to the heating temperature required by the heating module 11, so as to select the lead 50 with the corresponding wire diameter.
The lead 50 connected to the heat generating module 11 and the temperature detecting module 12 may be one or more.
In the present embodiment, a connector 60 for connecting an external power source is also connected to the lead 50. And an insulator in the connector 60 for separating the heat generating module 11 from the temperature detecting module 12.
Referring to fig. 1, the cover 30 is further opened with a communication port 31 communicating with the liquid container 20 so that the entire liquid container 20 forms a communicating vessel.
The household appliance of the present embodiment may be a cooking appliance with steaming function, for example, a steam box, a steaming and baking all-in-one machine, a steaming and baking micro all-in-one machine, and the liquid containing box 20 is a water tank for containing water, and the liquid level detecting device 10 is used for detecting the water level in the water tank.
When the liquid level detection device 10 works, the temperature of the heating module 11 connected with the temperature detection module 12 is higher than 100 ℃, when the water submerges the non-heating area S, the temperature of the heating module 11 is reduced, and at the moment, the temperature T measured by the temperature detection module 121≤100C, indicating that water exists at the preset liquid level of the water tank and water does not need to be added into the water tank; when the water level is lower than the heat generating module 11, the temperature of the heat generating module 11 rises, and the temperature T measured by the temperature detecting module 122A temperature of > 100 c indicates that there is no water at the predetermined level in the tank and that water needs to be added to the tank.
When the preset liquid level of the water tank is water or no water, the temperature difference delta T = T2-T1In a certain temperature range, the larger the temperature difference Δ T is, the higher the determination accuracy of the temperature detection module 12 is, and therefore, in order to improve the determination accuracy of the temperature detection module 12, the heating temperature of the heating module 11 may be appropriately increased, and when the heating module 11 is heated by electric energy, the supply current of the heating module 11 may be appropriately increased. The steam cooking appliance determines different temperatures of the heating module 11 in water and dry heating by using the temperature detection module 12 to detect the water level in the water tank.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (10)
1. A liquid level detection device, comprising: a heating module (11), a temperature detection module (12);
the heating module (11) is arranged at a preset liquid level, and the preset temperature of the heating module (11) is higher than the temperature of the liquid to be detected;
the temperature detection module (12) is used for detecting whether the actual temperature of the heating module (11) is lower than a preset temperature or not.
2. The liquid level detection device according to claim 1, wherein the temperature detection module (12) detects the temperature of the heat generating module (11) by thermal conduction.
3. The liquid level detection apparatus according to claim 2, further comprising a thermally conductive bracket (13), wherein the heat generating module (11) and the temperature detection module (12) are both in contact with the thermally conductive bracket (13) for thermal conduction.
4. A liquid level detection apparatus according to claim 3, wherein the heat conducting bracket (13) surrounding the outer surfaces of the heat generating module (11) and the temperature detection module (12) clamps the heat generating module (11) and the temperature detection module (12) in place.
5. The liquid level detection device according to claim 2, wherein the lowest point of the temperature detection module (12) is higher than the lowest point of the heat generating module (11).
6. The liquid level detection device according to claim 1, characterized in that the heat generating module (11) is fixed at a preset liquid level.
7. The fluid level detection apparatus of claim 6, further comprising: the liquid container comprises a container cover of a liquid container, wherein the liquid container is used for storing liquid to be detected; the temperature detection module (12) and the heating module (11) are fixedly connected with the box cover.
8. The liquid level detection device according to claim 1, further comprising a driving module for driving the heat generating module (11) to move from above a predetermined liquid level to a predetermined liquid level.
9. The liquid level detection device according to claim 1, wherein the heat generating module (11) is located in the center of a preset liquid level.
10. A household appliance, characterized in that it comprises: level detecting device (10) according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221841669.XU CN217716564U (en) | 2022-07-18 | 2022-07-18 | Liquid level detection device and household equipment provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221841669.XU CN217716564U (en) | 2022-07-18 | 2022-07-18 | Liquid level detection device and household equipment provided with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217716564U true CN217716564U (en) | 2022-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221841669.XU Active CN217716564U (en) | 2022-07-18 | 2022-07-18 | Liquid level detection device and household equipment provided with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217716564U (en) |
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2022
- 2022-07-18 CN CN202221841669.XU patent/CN217716564U/en active Active
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