CN211531350U - Heating plate power supply equipment and system - Google Patents
Heating plate power supply equipment and system Download PDFInfo
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- CN211531350U CN211531350U CN202020013820.5U CN202020013820U CN211531350U CN 211531350 U CN211531350 U CN 211531350U CN 202020013820 U CN202020013820 U CN 202020013820U CN 211531350 U CN211531350 U CN 211531350U
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- power supply
- sampling circuit
- heat generating
- comparator
- heating
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 132
- 238000005070 sampling Methods 0.000 claims abstract description 55
- 238000002955 isolation Methods 0.000 claims abstract description 23
- 238000003466 welding Methods 0.000 claims description 22
- 239000004065 semiconductor Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 4
- 230000020169 heat generation Effects 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Abstract
The application relates to a heating plate power supply device and system. The heating plate power supply equipment comprises a sampling circuit, isolation equipment, cut-off equipment and a comparator. The sampling circuit collects the working parameters of the heating plate and outputs the corresponding electric signals to the positive phase input end of the comparator. The output of isolation equipment is connected the board that generates heat, and the electric wire netting power is connected to the input, will generate heat the board and keep apart with the electric wire netting power, avoids personnel to electrocute. The comparator transmits the on-off signal to the on-off equipment by comparing the electric signal with the reference voltage, so that the connection and the on-off of the heating plate and the power supply of the power grid are realized, the working parameters of the heating plate are maintained in a safe range, and the heating plate is further protected.
Description
Technical Field
The application relates to the technical field of heating plates, in particular to a heating plate power supply device and system.
Background
Along with the improvement of living standard of people, heating equipment is more and more generally applied to daily house, and electric direct heating formula geothermol power, for example electric floor heating, electric carpet, electric bedplate and electric wallboard etc. its heat-generating body lug connection commercial power, and install together with geothermol power's metal material.
In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the traditional heating plate has the problem of low safety.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a heating panel power supply apparatus and system that can be highly safe.
In order to achieve the above object, in one aspect, an embodiment of the present invention provides a heating panel power supply apparatus, including:
a sampling circuit; the sampling circuit is used for collecting the working parameters of the heating plate and outputting corresponding electric signals;
isolating equipment; the input end of the isolation device is used for connecting a power grid power supply, and the output end of the isolation device is used for connecting the heating plate;
switching the device on and off; the first end of the cut-off equipment is connected with the isolation equipment, and the second end of the cut-off equipment is used for connecting the heating plate; and
a comparator; the positive phase input end of the comparator receives the electric signal, the negative phase input end of the comparator is used for accessing a reference voltage, and the output end of the comparator is connected with the third end of the switching-on and switching-off equipment.
In one embodiment, the sampling circuit comprises a temperature sampling circuit;
the temperature sampling circuit comprises a temperature sensor; the temperature sensor is used for collecting the temperature of the heating plate;
the temperature sampling circuit also comprises a differential amplifier; the differential amplifier is respectively connected with the temperature sensor and the positive phase input end of the comparator.
In one embodiment, the sampling circuit comprises a current sampling circuit;
the input end of the current sampling circuit is used for connecting the heating plate, and the output end of the current sampling circuit is connected with the positive phase input end of the comparator.
In one embodiment, the isolation device comprises any one of the following devices: toroidal transformers, high frequency electronic transformers and switching power supplies.
In one embodiment, the cut-off device comprises a MOS transistor;
the grid of MOS pipe is connected the output of comparator, and the drain electrode is connected isolation equipment, and the source electrode is used for connecting the board that generates heat.
On the other hand, the embodiment of the utility model provides a still provide a board power supply system generates heat, including the board that generates heat to and like foretell board power supply unit that generates heat.
In one embodiment, the heat generating plate includes:
a carrier plate;
at least one heat generating element group; each heating element is arranged on the bearing plate;
the heat generating element group includes a plurality of heat generating elements; one end of each heating element is used for being connected with one end of a power bus, and the other end of each heating element is used for being connected with the other end of the power bus; the heating element comprises a semiconductor heating element;
the heat generating element group further includes a connector; one end of the connector is connected with any heating element, and the other end is connected with the adjacent heating element group.
In one embodiment, the connector comprises a male and a female;
the first end of the male connector is connected with one end of any heating element, and the second end of the male connector is used for being connected with the second end of the female connector of another connector; the first end of the female connector is connected with the other end of any heating element, and the second end of the female connector is used for being connected with the second end of the male connector of another connector.
In one embodiment, the welding device further comprises a welding medium;
the bearing plate is provided with a groove;
the welding medium is fixed on the bottom surface of the groove; and each heating element group is fixed on one side of the welding medium far away from the bottom surface.
In one embodiment, the welding medium comprises any one or any combination of the following components: aluminium base board and PCB board.
One of the above technical solutions has the following advantages and beneficial effects:
the application provides a generate heat board power supply unit, sampling circuit gathers the working parameter who generates heat the board to with the signal of telecommunication output that corresponds for the normal phase input of comparator. The output of isolation equipment is connected the board that generates heat, and the electric wire netting power is connected to the input, will generate heat the board and keep apart with the electric wire netting power, avoids personnel to electrocute. The comparator transmits the on-off signal to the on-off equipment by comparing the electric signal with the reference voltage, so that the connection and the on-off of the heating plate and the power supply of the power grid are realized, the working parameters of the heating plate are maintained in a safe range, and the heating plate is further protected.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular description of preferred embodiments of the application, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the subject matter of the present application.
FIG. 1 is a first schematic block diagram of a heating panel power supply apparatus according to an embodiment;
FIG. 2 is a second schematic block diagram of a heating panel power supply apparatus according to an embodiment;
FIG. 3 is a third schematic block diagram of a heating panel power supply apparatus according to an embodiment;
FIG. 4 is a first schematic structural block diagram of a heat generating plate in one embodiment;
FIG. 5 is a second schematic structural block diagram of a heat generating plate according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "first end," "second end," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In one embodiment, as shown in fig. 1, there is provided a heat generating plate power supply apparatus including:
a sampling circuit 10; the sampling circuit is used for collecting the working parameters of the heating plate and outputting corresponding electric signals;
an isolation device 20; the input end of the isolation device is used for connecting a power grid power supply, and the output end of the isolation device is used for connecting the heating plate;
a cut-off device 30; the first end of the cut-off equipment is connected with the isolation equipment, and the second end of the cut-off equipment is used for connecting the heating plate; and
a comparator 40; the positive phase input end of the comparator receives the electric signal, the negative phase input end of the comparator is used for accessing a reference voltage, and the output end of the comparator is connected with the third end of the switching-on and switching-off equipment.
The sampling circuit may be any one of those in the art. The operating parameters may include temperature, current, voltage, and the like. The isolation device may be any device in the art capable of isolating the heat generating panel from the mains power supply. The disconnection device may include any device in the art having a connection to turn on or off the isolation device and the heat generating plate.
The sampling circuit is used for sampling the working parameters of the heating plate in real time and outputting corresponding electric signals. It should be noted that the electrical signal includes a sampled voltage signal. It should be noted that the sampling circuit samples the operating parameters of the heating plate and generates corresponding electrical signals as the characteristics of the sampling circuit itself.
The isolation device is used for isolating the heating plate from a power supply of a power grid. In one embodiment, the isolation device comprises any one of the following devices: toroidal transformers, high frequency electronic transformers and switching power supplies.
The positive phase input end of the comparator is connected with the output end of the sampling circuit and receives the electric signal transmitted by the sampling circuit. And if the value of the received electric signal is greater than the value of the reference voltage, transmitting a high-level signal to the switching-off equipment, and carrying out switching-off action or switching-on action on the switching-off equipment based on the high-level signal. And if the value of the received electric signal is smaller than the value of the reference voltage, transmitting a low-level signal to the switching-off equipment, and carrying out switching-on or switching-off action by the switching-off equipment according to the low-level signal. In one embodiment, the cut-off device comprises a MOS transistor; the grid of MOS pipe is connected the output of comparator, and the drain electrode is connected isolation equipment, and the source electrode is used for connecting the board that generates heat. When the MOS tube is an N-MOS tube, the grid electrode of the MOS tube receives a high level signal transmitted by the comparator, and the MOS tube is conducted; and the grid electrode of the MOS tube receives the low level signal transmitted by the comparator, and the MOS tube is cut off. When the MOS tube is a P-MOS tube, the grid electrode of the MOS tube receives a high level signal transmitted by the comparator, and the MOS tube is cut off; and the grid electrode of the MOS tube receives the low level signal transmitted by the comparator, and the MOS tube is conducted.
When the on-off equipment is closed, the heating plate works; and when the cut-off equipment is cut off, the heating plate loses power and stops working.
According to the heating plate power supply equipment, the sampling circuit collects the working parameters of the heating plate and outputs the corresponding electric signals to the positive phase input end of the comparator. The output of isolation equipment is connected the board that generates heat, and the electric wire netting power is connected to the input, will generate heat the board and keep apart with the electric wire netting power, avoids personnel to electrocute. The comparator transmits the on-off signal to the on-off equipment by comparing the electric signal with the reference voltage, so that the connection and the on-off of the heating plate and the power supply of the power grid are realized, the working parameters of the heating plate are maintained in a safe range, and the heating plate is further protected.
In one embodiment, as shown in FIG. 2, the sampling circuit 10 includes a temperature sampling circuit 110;
the temperature sampling circuit 110 includes a temperature sensor 101; the temperature sensor 101 is used for collecting the temperature of the heating plate;
the temperature sampling circuit 110 further includes a differential amplifier 103; the differential amplifier 103 is respectively connected with the temperature sensor 101 and the non-inverting input end;
the temperature sampling circuit is used for sampling the internal temperature of the heating plate in real time and outputting a sampling voltage value. The temperature sampling circuit comprises a temperature sensor and a differential amplifier, and the temperature sensor can be a positive temperature coefficient temperature sensor or a negative temperature coefficient temperature sensor. The control of the change rule of the sampling voltage value can be realized by setting the position of the temperature sensor. In the embodiment, the temperature sensor is a negative temperature coefficient temperature sensor and is arranged in the heating plate, and the sampling voltage value is reduced along with the increase of the internal temperature of the heating plate. In other embodiments, the temperature sensor may also be a positive temperature coefficient temperature sensor and is disposed in the heat-generating plate, and the sampling voltage value also increases with the increase of the temperature inside the heat-generating plate.
Through the setting of temperature sampling circuit for can carry out temperature protection to the board that generates heat.
In one embodiment, as shown in fig. 3, the sampling circuit 10 further includes a current sampling circuit 120;
the input end of the current sampling circuit 120 is used for connecting the heating plate, and the output end is connected to the positive input end of the comparator.
The current sampling circuit may be any one of current sampling circuits in the art.
Specifically, the sampling circuit further includes a current sampling circuit. The comparator may be two comparators or one comparator. When two comparators are employed, a first comparator and a second comparator. The output end of the temperature sampling circuit is connected with the positive phase input end of the first comparator, the negative phase input end of the first comparator is connected with the reference voltage, and the output end of the first comparator is connected with the on-off equipment. The positive phase input end of the second comparator is connected with the output end of the current sampling circuit, the negative phase input end of the second comparator is connected with the reference voltage, and the output end of the second comparator is connected with the switching-on and switching-off equipment. It should be noted that the reference voltage accessed by the first comparator and the reference voltage accessed by the second comparator may be different or the same.
Through the current sampling circuit, overcurrent protection can be carried out on the heating plate.
The embodiment of the utility model provides a still provide a board power supply system generates heat, including the board 100 that generates heat to and the board power supply unit 200 that generates heat as above-mentioned.
In one embodiment, as shown in fig. 4, the heat generating plate 100 includes:
a carrier plate 101;
at least one heat generating element group 103; each heating element group 103 is arranged on the bearing plate 101;
the heat generating element group 103 includes a plurality of heat generating elements 1031; each heating element is connected with a switching-off device; the heating element comprises a semiconductor heating element;
the heat generating element group further includes a connector 1033; the connector 1033 has one end connected to any one of the heat generating elements and the other end connected to an adjacent heat generating element group.
The bearing plate is a plate for bearing articles in a home, can be used as a floor, a wallboard, a bed board and the like, and can be made of metal materials, such as metal like aluminum, or can be made of metal materials and nonmetal materials. It should be noted that the shape of the supporting board is not fixed, and the size and shape of the supporting board can be adjusted according to actual needs, and further, the supporting board can include various patterns and designs according to the needs of users. In one particular example, the carrier plate is rectangular. In one embodiment, the carrier plate comprises a metal plate.
The heat generating element group is a module including a plurality of heat generating elements.
Specifically, the number of heat generating element groups may be 1 or more. The arrangement order of the heat generating element groups can be determined according to the actual assembly requirements and effects, and is not limited herein. The number of the heat generating elements in the heat generating element group may be plural. One end of each heating element is used for being connected with one end of the power bus, and the other end of each heating element is used for being connected with the other end of the power bus. The connection relationship between the heating elements may be such that one end of a heating element is connected to one end of another heating element and the other end is connected to the other end of another heating element. Assuming that the heat element group includes the heat element A, B, C, the heat element a includes an a1 terminal and an a2 terminal, the heat element B includes an B1 terminal and a B2 terminal, and the heat element C includes a C1 terminal and a C2 terminal, the a1 terminal is connected to the B1 terminal and the C1 terminal, respectively, and the a2 terminal is connected to the B2 terminal and the C2 terminal, respectively; or the end a1 is respectively connected with the end b1 and the end c2, and the end a2 is respectively connected with the end b2 and the end c 1; or the end a1 is respectively connected with the end b2 and the end c1, and the end a2 is respectively connected with the end b1 and the end c 2; or the end a1 is connected with the end b2 and the end c2 respectively, and the end a2 is connected with the end b1 and the end c1 respectively. Further, the heating element may be connected to the heating element at an adjacent position, or may be connected to the heating element at another position, which is not limited specifically. It should be noted that the adjacent position means that the relative position distance is minimum.
The heating element group is arranged on the bearing plate, can be directly attached to the bearing plate, and can also be arranged on the bearing plate through the intermediate element. Each of the heating elements includes a semiconductor heating element, and further, the heating element includes a nonlinear semiconductor heating element among the semiconductor heating elements. Through above-mentioned semiconductor heating element, can avoid traditional heating wire can not compromise the problem that heating power is invariable and align to grid, the resistance value of heating wire is more effectual than the phase ratio promptly, and the power when meeting access high voltage bus is invariable, just must make every heating wire that incorporates into the bus very long. One heating wire needs to be installed in a plurality of metal plates, and the length of each heating wire is fixed (since changing the length changes the resistance value, the power deviates from the set value). Therefore, it is difficult to achieve uniform arrangement in a room during actual laying, and the flexibility is poor.
The heat generating element group further includes a connector, which is a device having a connecting function. And the heating element groups are used for connecting other heating element groups. The number of connectors in each heat generating element group may be plural, that is, a single heat generating element group may connect a plurality of heat generating element groups. One end of the connector is connected with any heating element, and the other end of the connector is connected with the adjacent heating element group and is used for connecting all the heating elements in parallel to a power bus. By the parallel connection mode, if the heating element group has element damage, the heating plate can still maintain operation.
The heating plate comprises a bearing plate and at least one heating element group, wherein the heating element group comprises a plurality of heating elements, and each heating element is connected with a switching-off device. Heating element includes semiconductor heating element, compares in the traditional heating and adopts the mode that the line that generates heat was installed in opening the metal sheet that has little semicircle U mouth, and the heating element group of the electron heating plate of this application pastes in the loading board, has reduced and the loading board between the space, can directly give the loading board heat transfer. The heat generating element group further includes connectors, and the number of the connectors may be unlimited. One end of the connector is connected with any one heating element, and the other end of the connector is connected with the adjacent heating element group. By the connector, direct assembly between the heat generating element groups can be made possible. Compare in the assembly of heating equipment among the conventional art, need pack into the U downthehole with the line that generates heat, also need fix the installation such as metal soleplate, wallboard, bed board simultaneously, the electron that this application provided generates heat the board and has great promotion on assembly rate, also can arrange in a flexible way simultaneously.
In one embodiment, as shown in fig. 5, the connector includes a male head a and a female head b;
the first end of the male head a is connected with one end of any heating element, and the second end of the male head a is used for being connected with the second end of the female head b of another connector; the first end of the female head b is connected with the other end of any heating element, and the second end of the female head b is used for being connected with the second end of the male head a of another connector.
Specifically, the connector includes a male and a female. The male head can be connected with the female head. Through the arrangement of the male head and the female head of the heating element group, the heating element of the heating element group and the heating element of another heating element group can be connected in parallel, so that the electronic heating plate can run more stably.
In one embodiment, the welding device further comprises a welding medium;
the bearing plate is provided with a groove;
the welding medium is fixed on the bottom surface of the groove; and each heating element group is fixed on one side of the welding medium far away from the bottom surface.
The welding medium is fixed on the bottom surface of the groove; and each heating element group is fixed on one side of the welding medium far away from the bottom surface.
In particular, the soldering medium is used to carry various electronic components, including heat generating components and connectors. In one embodiment, the welding medium comprises any one or any combination of the following components: aluminium base board and PCB board.
The bearing plate is provided with a groove, and the shape and the size of the groove are not limited and can be determined according to a welding medium. The welding medium is fixed on the bottom surface of the groove. The welding medium includes a first face and a second face opposite the first face. The first surface is attached to the bottom surface of the groove, the second surface is a surface, far away from the bottom surface of the groove, of the welding medium, and each heating element group is fixed on the second surface.
In one embodiment, the welding medium comprises any one or any combination of the following components: aluminium base board and PCB board.
In a specific example, when the heat-conducting medium is a double-sided adhesive tape, the heat-conducting and fixing functions can be simultaneously performed. Other heat conduction materials in the field can be used for realizing the functions, and it should be noted that if the heat conduction materials do not carry the fixing function, any fixing means in the field can be used for fixing the heat conduction materials, the welding medium and the bearing plate. Preferably, screws may be used to secure the thermally conductive material.
Above-mentioned board power supply system generates heat, on the heat conducts to the loading board through the face, area of contact is bigger, and does not have the phenomenon in the space between line and the heating tube that generates heat among the traditional heating device, and the conduction velocity is more than the triple of the form that has adopted the line that generates heat now, heating that can be faster.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A heating panel power supply apparatus, characterized by comprising:
a sampling circuit; the sampling circuit is used for collecting working parameters of the heating plate and outputting corresponding electric signals;
isolating equipment; the input end of the isolation device is used for connecting a power grid power supply, and the output end of the isolation device is used for connecting the heating plate;
switching the device on and off; the first end of the cut-off equipment is connected with the isolation equipment, and the second end of the cut-off equipment is used for connecting the heating plate; and
a comparator; and the positive phase input end of the comparator receives the electric signal, the negative phase input end of the comparator is used for accessing a reference voltage, and the output end of the comparator is connected with the third end of the switching-on and switching-off equipment.
2. A heat generating plate power supplying apparatus according to claim 1, wherein the sampling circuit includes a temperature sampling circuit;
the temperature sampling circuit comprises a temperature sensor; the temperature sensor is used for collecting the temperature of the heating plate;
the temperature sampling circuit further comprises a differential amplifier; the differential amplifier is respectively connected with the temperature sensor and the positive phase input end of the comparator.
3. A heat generation panel power supply apparatus according to claim 1, wherein the sampling circuit includes a current sampling circuit;
the input end of the current sampling circuit is used for being connected with the heating plate, and the output end of the current sampling circuit is connected with the positive phase input end of the comparator.
4. A heat generating panel power supply apparatus according to claim 1, wherein the isolation apparatus comprises any one of: toroidal transformers, high frequency electronic transformers and switching power supplies.
5. A heat generating plate power supplying apparatus according to claim 1, wherein the cut-off apparatus includes a MOS tube;
the grid of the MOS tube is connected with the output end of the comparator, the drain electrode of the MOS tube is connected with the isolation device, and the source electrode of the MOS tube is connected with the heating plate.
6. A heat generation panel power supply system characterized by comprising a heat generation panel, and the heat generation panel power supply apparatus according to any one of claims 1 to 5.
7. A heat generating panel power supply system according to claim 6, wherein the heat generating panel comprises:
a carrier plate;
at least one heat generating element group; each heating element group is arranged on the bearing plate;
the heat generating element group includes a plurality of heat generating elements; each heating element is connected with the cut-off equipment; the heating element comprises a semiconductor heating element;
the heat generating element group further includes a connector; one end of the connector is connected with any one heating element, and the other end of the connector is connected with the adjacent heating element group.
8. A heat generating plate power supply system according to claim 7, wherein the connector includes a male head and a female head;
the first end of the male connector is connected with one end of any one heating element, and the second end of the male connector is used for being connected with the second end of the female connector of another connector; the first end of the female connector is connected with the other end of any heating element, and the second end of the female connector is used for being connected with the second end of the male connector of another connector.
9. A heat generating plate power supply system according to claim 8, further comprising a welding medium;
the bearing plate is provided with a groove;
the welding medium is fixed on the bottom surface of the groove; and each heating element group is fixed on one side of the welding medium far away from the bottom surface.
10. A heat generating plate power supply system according to claim 9, wherein the welding medium includes any one or any combination of the following components: aluminium base board and PCB board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020013820.5U CN211531350U (en) | 2020-01-02 | 2020-01-02 | Heating plate power supply equipment and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020013820.5U CN211531350U (en) | 2020-01-02 | 2020-01-02 | Heating plate power supply equipment and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211531350U true CN211531350U (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020013820.5U Expired - Fee Related CN211531350U (en) | 2020-01-02 | 2020-01-02 | Heating plate power supply equipment and system |
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| Country | Link |
|---|---|
| CN (1) | CN211531350U (en) |
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2020
- 2020-01-02 CN CN202020013820.5U patent/CN211531350U/en not_active Expired - Fee Related
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