Anti-scald heater

Abstract

The utility model relates to an anti-scald heater which comprises a heater body, a heating pad, a safety detector and a controller. The heating pad moves between a storage position and a working position relative to the heater body; when the heating pad moves to the working position, an object detection area is formed above the heating pad, and the safety detector detects whether an object exists in the object detection area or not; the controller is electrically connected with the heater body, the heating pad and the safety detector. According to the anti-scald heater, the state that the heated container is moved away from the heating pad can be detected in time, and therefore the risk that a user is scalded by the heating pad can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrothermal technology, in particular to an anti-scald heater. Background Art

[0002] In the cold winter, in order to maintain a comfortable living or working space, people usually use heaters to heat the surrounding air. The heater releases thermal radiation, that is, heat energy propagates in all directions in the form of electromagnetic waves, effectively heating the surrounding air, thereby establishing a warm environment throughout the room to help people resist the severe cold outside. At the same time, in order to ensure that drinks, food, etc. placed indoors are not easily cooled rapidly due to the low ambient temperature, affecting the taste and eating experience, people usually use a heating pad, a practical tool. The working principle of the heating pad is that the heating element inside continuously generates heat and conducts this heat evenly to the pad surface, and then heats the containers (such as cups, bowls, etc.) placed on it to achieve the effect of heat preservation or further heating.

[0003] In order to facilitate people to use the heater for heating indoor air and the heating pad for heating food at the same time, the prior art integrates the heating pad onto the heater, saving the occupied space, improving the operation convenience of the heating pad and the heater, and also being able to make full use of heat energy and reduce energy waste.

[0004] However, the heating pad of the prior art continuously generates heat after being powered on, and a large amount of heat of the heating pad will accumulate, resulting in a sharp rise in the surface temperature of the heating pad; when the user removes the container from the heating pad, the heating element of the heating pad does not stop working, and if the user accidentally touches the high-temperature heating pad, there is a risk of scalding. Summary of the Utility Model

[0005] Based on this, the purpose of the utility model is to overcome the defects or deficiencies of the prior art and provide an anti-scald heater with a safety detector.

[0006] The anti-scald heater includes a heater body, a heating pad, a safety detector and a controller; the heating pad moves relative to the heater body between a storage position and a working position; when the heating pad moves to the working position, an object detection area is formed above it, and the safety detector detects whether there is an object in the object detection area; the controller is electrically connected to the heater body, the heating pad and the safety detector respectively.

[0007] The anti-scald heater of the utility model can timely detect the state that the heated container is removed from the heating pad, thereby reducing the risk of the user being scalded by the heating pad.

[0008] Further, the safety detector is a photoelectric sensor, and the photoelectric sensor is arranged on the side wall of the heater body and faces the object detection area above the heating pad.

[0009] Further, the heating pad forms a heating surface on one of its side surfaces, and the heating surface is divided into a heating area and a non-heating area; the photoelectric sensor is correspondingly arranged at a position opposite to the non-heating area.

[0010] Further, the photoelectric sensor includes a light-transmitting plate, and a waterproof layer is arranged on the surface of the light-transmitting plate.

[0011] Further, a plurality of heat dissipation holes are formed in the non-heating area of the heating pad.

[0012] Further, a storage groove for accommodating the heating pad is arranged on the side wall of the heater body, and the surface of the light-transmitting plate of the photoelectric sensor is flush with the bottom surface of the storage groove.

[0013] Further, the safety detector is a pressure sensor, and the pressure sensor is arranged in the heating pad and faces the object detection area above the heating pad.

[0014] Further, the heating pad is hinged to the heater body through a connecting shaft.

[0015] Further, a handle is further included, and the handle is arranged on the outer side of the heating pad.

[0016] Further, a first locking member and a second locking member which are respectively arranged in the heater and on the heating pad and are locked with each other are further included, and the first locking member and the second locking member lock the heating pad to the heater body.

[0017] For better understanding and implementation, the present invention will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the anti-scald heater of the present application;

[0019] Figure 2 It is a schematic working diagram of the anti-scald heater of the present application;

[0020] Figure 3 It is a schematic structural diagram of the anti-scald heater when the heating pad of the present application is in the storage position;

[0021] Figure 4 It is a schematic structural diagram of the anti-scald heater when the heating pad with a handle of the present application is in the storage position;

[0022] Figure 5Schematic structural diagram of the anti-scald heater when the heating pad with a handle in this application is in the working position;

[0023] Figure 6 Schematic structural diagram of the outer shell of the optoelectronic sensor in this application;

[0024] Figure 7 Schematic structural diagram of the anti-scald heater with heat dissipation holes in this application.

[0025] Description of the drawings: Heater body 10, storage groove 11, heating pad 20, heating surface 21, heating area 211, non-heating area 212, handle 23, safety detector 30, outer shell 31, light-transmitting plate 311, first locking member 41, second locking member 42, container 100. Detailed implementation manners

[0026] Aiming at the problem that the prior art is likely to cause scalding to users, this application designs an anti-scald heater provided with a safety detector 30. The basic concept of this application is as follows:

[0027] Please refer to Figure 1 , the anti-scald heater of this application includes a heater body 10, a heating pad 20, a safety detector 30 and a controller (not shown in the figure).

[0028] The heating pad 20 moves relative to the heater body 10 between a storage position and a working position; when the heating pad 20 moves to the working position, an object detection area is formed above the heating pad 20, and the safety detector 30 detects whether there are objects such as a container in the object detection area. The controller is electrically connected to the heater body 10 and the heating pad 20 respectively to control their switches; the controller is electrically connected to the safety detector 30 to receive the detection signal of the safety detector 30 or send a control instruction to the safety detector 30.

[0029] During use, please refer to Figure 2 , move the heating pad 20 to the working position, place its heating surface 21 facing upward, place the container 100 containing the object to be heated above the heating surface 21 of the heating pad 20, and the user turns on the heater body 10 and the heating pad 20 through the controller. The heating pad 20 heats the bottom surface of the container 100. The safety detector 30 continuously detects whether there are objects such as a container on the heating pad 20. If the safety detector 30 does not detect an object, the safety detector 30 transmits the detection result to the controller, and the controller performs an operation to cut off the power supply of the heating pad 20, and the heating pad 20 stops heating. Therefore, after the heated container is removed, the heating pad 20 stops accumulating heat, which can prevent the temperature of the heating surface 21 of the heating pad from rising, thereby reducing the risk of the user being scalded by the heating pad 20.

[0030] The following are some embodiments for implementing the above operations.

[0031] Example 1

[0032] Please refer to Figure 1 , the anti-scald heater of this embodiment includes a heater body 10, a heating pad 20, a safety detector 30 and a controller.

[0033] Specifically, a receiving groove 11 for receiving the heating pad 20 is provided on the side wall of the heater body 10. The controller is electrically connected to the heater body 10 to control its switch.

[0034] The heating pad 20 is internally provided with heating wires, and the heating wires are arranged on one side surface to form a heating surface 21. The heating pad 20 is hinged to the heater body 10 through a connecting shaft, and the connecting shaft is arranged at the bottom of the side wall of the heater body 10. The heating pad 20 moves relative to the heater body 10 between a receiving position and a working position.

[0035] When the heating pad 20 moves to the receiving position, please refer to Figure 3 , the heating pad 20 is located in the receiving groove 11, and the heating surface 21 of the heating pad 20 faces the receiving groove 11. When the heating pad 20 moves to the working position, please refer to Figure 1 , the heating surface 21 of the heating pad 20 faces upward. The controller is electrically connected to the heating pad 20 to control its switch.

[0036] Preferably, the heating pad 20 is locked to the heater body 10 by a first locking member 41 and a second locking member 42 to maintain the receiving position. Specifically, the first locking member 41 and the second locking member 42 are respectively arranged in the receiving groove 11 and on the heating pad 20 and are locked with each other to lock the heating pad 20 into the receiving groove 11. In this embodiment, the locking structure 40 adopts a push-button locking structure. When the heating pad 20 is pushed towards the heater body 10, the locking between the heating pad 20 and the heater can be released and the heating pad 20 can be ejected from the receiving groove 11.

[0037] The heating wire is arranged at the center position of the heating surface 21. Under the control of the controller, the heating pad 20 is powered on, and its heating wire emits heat and conducts heat through the central area, forming a heating area 211 in the central area; the remaining areas on the heating surface 21 form a non-heating area 212. Preferably, the heating area 211 is circular, which can match the common bottom shape of a cup, avoiding the risk of scalding people due to an overly large heating area 211; and can make the bottom of the cup cover the heating area 211 as much as possible, reducing the heating of the non-cup-bottom area by the heating area 211 and thus saving energy.

[0038] In some embodiments, please refer to Figure 4 and Figure 5 , a handle 23 is provided outside the heating pad 20, and the height of the handle 23 is the same as the distance from the bottom edge of the storage groove 11 to the bottom surface of the heater body 10. The handle 23 is beneficial for the user to move the heating pad 20 from the storage position to the working position; when the heating pad 20 is moved to the working position, the handle 23 and the connecting shaft cooperate as a bracket to make the heating surface 21 of the heating pad 20 face upward. In addition, the handle 23 and the connecting shaft lift the heating pad 20, forming a gap 24 between the heating pad 20 and the working platform where it is located. Since the heating surface 21 faces away from the gap 24, when the user needs to move the heating pad 20 to the storage position, the hand can be inserted into the gap 24 to push the heating pad 20 to the storage position, avoiding contact with the heating surface 21 and causing scalding. In addition, after the heating pad 20 is locked to the storage position, the handle 23 can facilitate the user to move the entire body of the anti-scald heater to the position where it needs to be placed.

[0039] In this embodiment, the safety detector 30 is a photoelectric sensor, which is located at the lower part of the side wall of the heater body 10, arranged in the storage groove 11, and faces the object detection area above the heating pad. The photoelectric sensor is electrically connected to the controller. When the heating pad 20 is moved to the working position, the controller controls the photoelectric sensor to continuously detect whether there are objects such as containers on the heating pad 20. If the photoelectric sensor does not detect an object, the photoelectric sensor transmits the detection result to the controller, and the controller performs the operation of cutting off the power supply of the heating pad 20 according to the result that the photoelectric sensor does not detect an object. Preferably, the photoelectric sensor is correspondingly arranged at a position directly opposite to the non-heating area 212 of the heating pad 20 to prevent the residual heat of the heating area 211 after the heating pad 20 is stored from deforming and damaging the photoelectric sensor.

[0040] Specifically, please refer to Figure 6, the optoelectronic sensor in this embodiment is preferably a reflective optoelectronic sensor, including a housing 31 and a transmitter, a receiver, and a microcircuit board disposed inside the housing 31; a light-transmitting plate 311 is provided on one side of the housing 31, the light-transmitting plate 311 is disposed facing away from the heater body 10, and the microcircuit board is electrically connected to the transmitter and the receiver respectively. The circuit board controls the transmitter to emit infrared light, and the infrared light emits from inside the housing 31 through the light-transmitting plate 311. When the infrared light is emitted to the container 100 and reflected to the receiver, the safety control circuit of the microcircuit board is turned on and sends a signal to the controller, so that the controller controls the heating pad 20 to heat; when the receiver does not receive the reflected infrared light, the safety control circuit of the microcircuit board is turned off, and the controller performs an operation of cutting off the power supply of the heating pad 20 according to the signal that the safety control circuit is turned off.

[0041] The surface of the light-transmitting plate 311 of the optoelectronic sensor is flush with the bottom surface of the storage groove 11 to prevent the optoelectronic sensor from being embedded inside the heater body 10 to form a water accumulation platform; or to prevent the optoelectronic sensor from protruding from the bottom surface of the storage groove 11 to form a water accumulation platform, and to prevent the optoelectronic sensor from hindering the storage of the heating pad 20 into the storage groove 11.

[0042] In some embodiments, the optoelectronic sensor may be an optoelectronic sensor of types such as a transmissive optoelectronic sensor, a diffuse reflection optoelectronic sensor, etc.

[0043] The working principle of the above anti-scald heater is as follows: When in use, the user moves the heating pad 20 to the working position, places its heating surface 21 facing upward, places the container 100 containing the object to be heated above the heating area 211 of the heating pad 20, and the side surface of the container 100 faces the optoelectronic sensor. The user turns on the heater body 10 and the heating pad 20 through the controller, and the heating pad 20 heats the bottom surface of the container 100. The transmitter of the optoelectronic sensor continuously emits infrared light to detect whether there is an object such as a container on the heating pad 20. If the infrared light emitted by the optoelectronic sensor is not reflected to the receiver, it means that no object is detected. The safety control circuit inside the optoelectronic sensor is turned off and sends a signal to the controller, and the controller performs an operation of cutting off the power supply of the heating pad 20, and the heating pad 20 stops heating; when the infrared light is emitted to the container 100 and reflected to the receiver, the safety control circuit of the microcircuit board is turned on and sends a signal to the controller, so that the controller controls the heating pad 20 to heat. Therefore, after the heated container is removed, the heating pad 20 stops accumulating heat, can prevent the temperature of the heating surface 21 of the heating pad from rising, and thus can reduce the risk of the user being scalded by the heating pad 20.

[0044] During the use test of the above anti-scald heater, technicians found that the detection of whether there is a container 100 on the heating pad by the photoelectric sensor is not accurate enough. Replacing the model of the photoelectric sensor or adjusting its position has a certain improvement effect, but the problem cannot be well solved. Further, the technicians found that the inaccurate detection of the photoelectric sensor is due to the following reasons: when using the container 100 to hold liquid, the liquid inside the container 100 or the liquid on the user's hand may spill onto the surface of the light-transmitting plate 311 of the photoelectric sensor; in addition, after the user puts the heating pad 20 into the storage groove 11, there is hot air in the gap between the storage groove and the heating pad. After the hot air cools, the moisture in the air condenses into water droplets and adheres to the light-transmitting plate 311 of the photoelectric sensor, and the water droplets on the light-transmitting plate 311 interfere with the detection of the container 100 by the photoelectric sensor; in addition, the infiltration into the interior of the housing 31 will also affect the accuracy of the photoelectric sensor detection. Therefore, the technicians of the present application made the following improvements to the anti-scald heater for the above problems:

[0045] A waterproof layer is provided on the surface of the light-transmitting plate 311, and the material of the waterproof layer is preferably one or more of silicone, fluorocarbon resin, and polyurethane. Since the waterproof layer has hydrophobicity, when a liquid drop falls on the surface of the waterproof layer, the liquid drop flows away under the action of gravity and is not easily adhered to the waterproof layer, thereby avoiding the liquid drop from affecting the light transmittance of the light-transmitting plate 311. Further, please refer to Figure 7 , a plurality of heat dissipation holes 24 are opened on the non-heating area 212 of the heating pad 20, so that the hot air existing in the gap between the storage groove and the heating pad is dissipated in time, preventing water vapor from condensing on the light-transmitting plate 311 or infiltrating into the photoelectric sensor.

[0046] Example 2

[0047] Embodiment 2 is basically the same as Embodiment 1, the difference is that:

[0048] The safety detector 30 is a pressure sensor resistant to temperature changes, and the pressure sensor is arranged in the heating pad 20 and is located below the heating area 211. The pressure sensor is electrically connected to the controller. When the heating pad 20 moves to the working position, the controller controls the pressure sensor to continuously detect whether there is an object such as a container on the heating pad 20. If the pressure sensor does not detect an object, the pressure sensor transmits the detection result to the controller. Since the pressure sensor is arranged in the heating pad 20, it is not easily contaminated by external pollutants and affects the detection effect; the pressure sensor is located below the heating area 211, and the position detection of the container 100 is more accurate.

[0049] It can be understood that there are various implementation forms of the pressure sensor resistant to temperature change. For example, a strain gauge sensitive to pressure change is selected, and the difference in resistance change of the strain gauge caused by pressure change is much larger than the difference in resistance change of the strain gauge caused by temperature change. Then, the difference in resistance change of the strain gauge caused by temperature change can be almost ignored, so as to realize that the pressure sensor detects pressure change without being affected by temperature change when the heating pad 20 is heating. Another example is to set two pressure sensors. One is set close to the heating surface to detect both pressure change and temperature change at the same time; the other is set far away from the heating surface, and the pressure change on the heating surface will not be transmitted to this pressure sensor. Therefore, this pressure sensor only detects temperature change and is used to calibrate the pressure sensor that detects both pressure change and temperature change. The two pressure sensors cooperate to work so as to realize that the pressure sensor detects pressure change without being affected by temperature change when the heating pad 20 is heating.

[0050] Compared with the prior art, the anti-scald heater described in the present invention can timely detect the state that the heated container is removed from the heating pad and perform safety protection operations in a timely manner. Among them, the use of a photoelectric sensor has the advantages of convenient installation and low cost. Further setting the position of the photoelectric sensor and also setting a waterproof layer on the photoelectric sensor can prevent accumulated water from affecting the detection effect of the photoelectric sensor. In addition, heat dissipation holes are also provided to prevent water vapor from condensing in the photoelectric sensor. The use of a pressure sensor can effectively avoid the pollution of external pollutants and detect the position of the container more accurately. In addition, a locking member and a handle are also provided to facilitate the user to flexibly move the position of the heating pad.

[0051] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and the present invention also intends to include these modifications and deformations.

Claims

1. An anti-scald heater, characterized in that: It includes a heater body, a heating pad, a safety detector and a controller; the heating pad moves relative to the heater body between a storage position and a working position; when the heating pad moves to the working position, an object detection area is formed above it, and the safety detector detects whether there is an object in the object detection area; the controller is electrically connected to the heater body, the heating pad and the safety detector respectively.

2. The anti-scald heater according to claim 1, wherein: The safety detector is a photoelectric sensor, and the photoelectric sensor is arranged on the side wall of the heater body and faces the object detection area above the heating pad.

3. The anti-scald heater according to claim 2, wherein: The heating pad forms a heating surface on one of its side surfaces, and the heating surface is divided into a heating area and a non-heating area; the photoelectric sensor is correspondingly arranged at a position opposite to the non-heating area.

4. The anti-scald heater according to claim 3, characterized in that: The photoelectric sensor includes a light-transmitting plate, and a waterproof layer is provided on the surface of the light-transmitting plate.

5. The anti-scald heater according to claim 4, characterized in that: A plurality of heat dissipation holes are formed in the non-heating area of the heating pad.

6. The anti-scald heater according to claim 5, wherein: A storage groove for receiving the heating pad is provided on the side wall of the heater body, and the surface of the light-transmitting plate of the photoelectric sensor is flush with the bottom surface of the storage groove.

7. The anti-scald heater according to claim 1, wherein: The safety detector is a pressure sensor, and the pressure sensor is arranged in the heating pad and faces the object detection area above the heating pad.

8. The anti-scald heater according to any one of claims 1 to 7, characterized in that: The heating pad is hinged to the heater body through a connecting shaft.

9. The anti-scald heater according to claim 8, characterized in that: It further includes a handle, and the handle is arranged on the outside of the heating pad.

10. The anti-scald heater according to claim 9, characterized in that: It further includes a first locking member and a second locking member which are respectively arranged on the heater and the heating pad and are locked to each other, and the first locking member and the second locking member lock the heating pad to the heater body.

Images