CN114271707B - Oven with a baking oven - Google Patents
Oven with a baking oven Download PDFInfo
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- CN114271707B CN114271707B CN202111659547.9A CN202111659547A CN114271707B CN 114271707 B CN114271707 B CN 114271707B CN 202111659547 A CN202111659547 A CN 202111659547A CN 114271707 B CN114271707 B CN 114271707B
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Abstract
The invention discloses an oven, which comprises a power supply access module, a change-over switch, a heating module and a temperature control module, wherein in an energy-saving mode, a first heating element and a second heating element in the heating module are connected in parallel and then connected in series between a first temperature controller and a second temperature controller; the temperature of the oven cavity is measured through the first temperature controller and is compared with a preset temperature to control the heating module to work or stop working, so that the temperature of the oven cavity is stabilized near a target set temperature; the temperature sensor has the advantages that the temperature sensor is used for measuring the ambient temperature of the panel through the second temperature controller, and the temperature sensor is alternatively closed and opened according to the preset time proportion under the condition that the temperature sensor reaches the third preset temperature, so that the temperature sensing delay defect caused by the fact that the temperature probe is away from the center of the cavity of the oven is overcome, the loss of heat energy is reduced in an energy-saving mode, the energy utilization efficiency of the oven is improved, the temperature control precision is effectively improved, and the cooking effect is improved.
Description
Technical Field
The invention relates to the field of cooking equipment, in particular to an oven.
Background
An electric oven is a kitchen appliance widely used by consumers in europe, and has a very high popularity in european countries. In order to control the energy use efficiency of the product, the European Union makes a specification on energy efficiency indexes in an legislative mode, and ovens sold in European Union countries are required to meet local energy efficiency requirements. Because the household oven has high heat quantity, how to effectively perform electric heat exchange, fully utilize heat energy, and improve the utilization rate of energy sources, the heat exchange is an important consideration for many factories in designing products. The efficiency of oven energy utilization can be influenced in many aspects such as the selection of heating elements, the selection of temperature controllers, the matching of heat preservation materials, the design of product structures, the control of software and the like.
In the existing mechanical oven, the working frequency of the heating unit is controlled by the PCB in the energy-saving mode, so that the heating unit meets the requirement of European Union energy efficiency, but the method has higher cost, and the cooking effect in the actual energy-saving mode is not as good as that in other modes, and the use frequency is very low; the heating units are connected in series or connected in series and in parallel through the change-over switch, but the temperature control precision is low, so that the cooking effect is poor.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art, and provides an oven which can improve the energy utilization efficiency and the temperature control precision of the oven and improve the cooking effect.
In a first aspect, an embodiment of the present invention provides an oven, including a power access module, a change-over switch, a heating module, and a temperature control module; the power supply access module comprises a live wire end and a zero wire end; the transfer switch comprises a first switch and a second switch; the heating module comprises a first heating element and a second heating element; the temperature control module comprises a first temperature controller and a second temperature controller;
the fire wire end is connected to one end of the first switch, the other end of the first switch is connected to one end of the second temperature controller, and the other end of the second temperature controller is connected to one end of the first heating element and one end of the second heating element through the second switch; the other end of the first heating element and the other end of the second heating element are connected to one end of the first temperature controller, and the other end of the first temperature controller is connected to the zero line end;
in the energy saving mode:
the first switch and the second switch are closed;
the first temperature controller is used for measuring the temperature of the oven cavity, and is opened when the temperature of the oven cavity is higher than a first preset temperature, and is closed when the temperature of the oven cavity is lower than a second preset temperature; the first preset temperature is greater than the second preset temperature;
the second temperature controller is used for measuring the panel environment temperature and alternately switching on and switching off according to a preset time proportion under the condition that the panel environment temperature is larger than a third preset temperature.
The oven provided by the embodiment of the invention has at least the following beneficial effects: by configuring the power supply access module, the change-over switch, the heating module and the temperature control module, the first switch and the second switch are closed in the energy-saving mode, so that a first heating element and a second heating element in the heating module are mutually connected in parallel, and the first heating element and the second heating element after being connected in parallel are connected in series between the first temperature controller and the second temperature controller; the temperature of the oven cavity is measured through the first temperature controller and is compared with a preset temperature to control the heating module to work or stop working, so that the temperature of the oven cavity is stabilized near a target set temperature; the temperature sensor has the advantages that the temperature sensor is used for measuring the ambient temperature of the panel through the second temperature controller, and is alternatively closed and opened according to the preset time proportion under the condition of reaching the third preset temperature, so that the temperature sensing delay defect caused by the fact that the distance between the temperature probe and the center of the oven cavity is reserved for the first temperature controller is overcome, the oven cavity temperature is far greater than the target set temperature when the heating module stops working, the oven cavity temperature is far less than the target set temperature when the heating module is prevented from being electrified again to work, the loss of heat energy is reduced in an energy-saving mode, the energy utilization efficiency of the oven is improved, the temperature control precision is effectively improved, and the cooking effect is improved.
In the above oven, the alternately closing and opening according to a preset time ratio includes:
opening after closing the first preset time period;
and closing after opening the second preset time period.
Under the condition that the panel environment temperature is greater than the third preset temperature, the working time length and the stop working time length of the heating module are effectively controlled by using the panel environment temperature through setting the closing duration of the second temperature controller as the first preset time length TI and setting the opening duration of the second temperature controller as the second preset time length T2, namely setting the time proportion of the second temperature controller for alternately closing and opening, and controlling the operation of the heating module by using the oven cavity temperature in cooperation with the first temperature controller, so that the accuracy of oven temperature control is improved.
In the above oven, the first temperature controller is a liquid expansion temperature controller or a temperature limiter.
In the above oven, the second temperature controller is an adjustable temperature controller.
In the oven, the change-over switch further comprises a third switch and a fourth switch, the live wire end is connected to one end of the third switch and one end of the fourth switch, the other end of the third switch is connected to one end of the first heating element, and the other end of the fourth switch is connected to one end of the second heating element.
In the above oven, the heating module further comprises a third heating element, the change-over switch further comprises a fifth switch, the live wire end is connected to one end of the fifth switch, and the other end of the fifth switch is connected to one end of the first temperature controller through the third heating element.
In the oven, a first kick temperature controller is further arranged between the fire wire end and the change-over switch.
In the oven, a heat radiation fan is arranged between the live wire end and the zero wire end.
In the oven, a second kick temperature controller is arranged between the fire wire end and the heat radiation fan.
In the oven, the change-over switch further comprises a sixth switch, the live wire end is connected to one end of the sixth switch, and a furnace lamp is arranged between the other end of the sixth switch and the zero line end.
In a second aspect, an embodiment of the present invention provides an oven, including a power access module, a change-over switch, a heating module, and a temperature control module; the power supply access module comprises a live wire end and a zero wire end; the transfer switch comprises a first switch and a second switch; the heating module comprises a first heating element and a second heating element; the temperature control module comprises a liquid expansion type temperature controller and an adjustable temperature controller; the fire wire end is connected to one end of the first switch, the other end of the first switch is connected to one end of the adjustable temperature controller, and the other end of the adjustable temperature controller is connected to one end of the first heating element and one end of the second heating element through the second switch; the other end of the first heating element and the other end of the second heating element are connected to one end of the liquid expansion type temperature controller, and the other end of the liquid expansion type temperature controller is connected to the zero line end.
The oven provided by the embodiment of the invention has at least the following beneficial effects: by configuring the power supply access module, the change-over switch, the heating module and the temperature control module, when the first switch and the second switch are closed, the first heating element and the second heating element in the heating module are mutually connected in parallel, and the first heating element and the second heating element after being connected in parallel are connected in series between the liquid expansion type temperature controller and the adjustable temperature controller; controlling the heating module to work or stop working by measuring the temperature of the oven cavity through the liquid expansion type temperature controller, so that the temperature of the oven cavity is stabilized near the target set temperature; the temperature controller is used for controlling the heating module to work or stop working by measuring the ambient temperature of the panel, so that the temperature sensing delay defect caused by the distance between the temperature probe and the center of the oven cavity is overcome, the temperature of the oven cavity is prevented from being far greater than the target set temperature when the heating module stops working and the temperature of the oven cavity is prevented from being far less than the target set temperature when the heating module is electrified again to work, the loss of heat energy is reduced, the energy utilization efficiency of the oven is improved, the temperature control precision is effectively improved, and the cooking effect is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate and do not limit the invention.
The invention is further described below with reference to the drawings and examples;
fig. 1 is a schematic circuit diagram of an oven according to an embodiment of the present invention;
fig. 2 is a schematic control diagram of alternate on/off of a second thermostat of an oven according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
In the description of the present invention, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
The embodiment of the invention provides an oven, which can improve the energy utilization efficiency and the temperature control precision of the oven and improve the cooking effect.
Embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of a first aspect of the present invention provides an oven including a power access module 100, a change-over switch 200, a heating module 300, and a temperature control module 400; the power access module 100 includes a live line end L and a neutral line end N; the transfer switch 200 includes a first switch 210 and a second switch 220; the heating module 300 includes a first heating element 310 and a second heating element 320; the temperature control module 400 includes a first temperature controller 410 and a second temperature controller 420;
the wire end L is connected to one end of the first switch 210, the other end of the first switch 210 is connected to one end of the second temperature controller 420, the other end of the second temperature controller 420 is connected to one end of the first heating element 310 and to one end of the second heating element 320 through the second switch 220; the other end of the first heating element 310 and the other end of the second heating element 320 are connected to one end of the first temperature controller 410, and the other end of the first temperature controller 410 is connected to the zero line end N;
in the energy saving mode:
the first switch 210 and the second switch 220 are closed;
the first temperature controller 410 is configured to measure a temperature of the oven cavity, and is opened when the temperature of the oven cavity is greater than a first preset temperature, and is closed when the temperature of the oven cavity is less than a second preset temperature; the first preset temperature is greater than the second preset temperature;
the second temperature controller 420 is configured to measure an ambient temperature of the panel, and alternately switch on and switch off according to a preset time ratio when the ambient temperature of the panel is greater than a third preset temperature.
According to the oven provided by the embodiment of the invention, by configuring the power supply access module 100, the change-over switch 200, the heating module 300 and the temperature control module 400, in the energy saving mode, the first switch 210 and the second switch 220 are closed, so that the first heating element 310 and the second heating element 320 in the heating module 300 are mutually connected in parallel, and the first heating element 310 and the second heating element 320 after being connected in parallel are connected in series between the first temperature controller 410 and the second temperature controller 420; the first temperature controller 410 measures the temperature of the oven cavity and compares the measured temperature with a preset temperature to control the heating module 300 to operate or stop operating so that the temperature of the oven cavity is stabilized near a target set temperature; the second temperature controller 420 is used for measuring the ambient temperature of the panel, and is alternatively turned on and turned off according to the preset time proportion under the condition of reaching the third preset temperature, so that the temperature sensing delay defect caused by the fact that the distance between the temperature probe and the center of the oven cavity is present in the first temperature controller 410 is overcome, the oven cavity temperature is prevented from being far greater than the target set temperature when the heating module 300 stops working, the oven cavity temperature is prevented from being far less than the target set temperature when the heating module 300 is electrified again to work, the loss of heat energy is reduced in an energy-saving mode, the energy utilization efficiency of the oven is improved, the temperature control precision is effectively improved, and the cooking effect is improved.
It can be appreciated that, in the energy saving mode, the first temperature controller 410, the heating module 300 and the second temperature controller 420 are equivalent to being in a series connection relationship, and the condition that the first temperature controller 410 is disconnected or the condition that the second temperature controller 420 is satisfied can all cause the heating module 300 to stop working; at the same time, the condition that the first thermostat 410 is closed and the condition that the second thermostat 420 is closed are satisfied, so that the heating module 300 can be powered on.
Specifically, in one example, the user uses the oven to perform baking in the energy saving mode, for example, the target temperature is set to 250 ℃, at this time, the first preset temperature may be set to 250 ℃, that is, when the oven cavity temperature measured by the first temperature controller 410 is greater than 250 ℃, the first temperature controller 410 is turned off, so that the power supply to the first heating element 310 and the second heating element 320 in the heating module 300 is stopped, so that the first heating element 310 and the second heating element 320 stop working, and the oven cavity temperature gradually decreases after the first heating element 310 and the second heating element 320 stop working. In addition, the second preset temperature may be set to 230 ℃, that is, when the oven cavity temperature measured by the first temperature controller 410 is less than 230 ℃, the first temperature controller 410 is closed again to supply power to the first heating element 310 and the second heating element 320 in the heating module 300 again, so that the oven cavity temperature will rise gradually after the first heating element 310 and the second heating element 320 are re-operated. The heating module 300 is controlled to operate or stop operating by measuring the oven cavity temperature through the first thermostat 410 such that the oven cavity temperature is stabilized around the target set temperature. However, in the actual operation process of the oven, because the temperature probe of the first temperature controller 410 is spaced from the center of the oven cavity, there is a delay in the temperature measured by the first temperature controller 410, for example, when the measured temperature of the oven cavity is 250 ℃, the temperature of the center of the oven cavity has actually reached 270 ℃, so that the temperature inside the oven cavity is far higher than the target temperature set value of 250 ℃ when the heating module 300 stops working; for another example, when the measured oven cavity temperature is 230 ℃, the temperature in the center of the oven cavity is actually 210 ℃, such that the temperature inside the oven cavity is well below the target temperature set point 250 ℃ when the heating module 300 is re-operated.
In the oven provided in this embodiment, when operating in the energy-saving mode, the second temperature controller 420 is connected in series to measure the panel ambient temperature on the basis of the first temperature controller 410. It should be noted that when the oven cavity temperature reaches about 250 ℃, the panel environmental temperature of the control panel of the oven is generally stabilized at about a certain temperature, for example, 60 ℃, and at this time, the third preset temperature may be set to 60 ℃, that is, when the panel environmental temperature measured by the second temperature controller 420 is greater than 60 ℃, the second temperature controller 420 is alternately turned on and off according to a preset time proportion, for example, the second temperature controller 420 is turned off again after being turned on for 30 seconds, so that the heating module 300 is alternately operated and stopped according to the preset time proportion, further, the oven cavity temperature is more maintained about 250 ℃, and the temperature of the oven cannot deviate too far, so that the temperature control accuracy of the oven is higher.
Referring to fig. 2, in the above oven, the alternately closing and opening according to a preset time ratio includes:
opening after closing the first preset time period;
and closing after opening the second preset time period.
When the panel environment temperature is greater than the third preset temperature, the operation duration and the stop operation duration of the heating module 300 are controlled by effectively utilizing the panel environment temperature and utilizing the oven cavity temperature in cooperation with the first temperature controller 410 by setting the closing duration of the second temperature controller 420 as the first preset duration TI and the opening duration of the second temperature controller 420 as the second preset duration T2, namely, setting the time proportion of alternately closing and opening the second temperature controller 420, so that the accuracy of the oven temperature control is improved.
It is understood that the first preset time period TI and the second preset time period T2 may be set to the same value, for example, both set to 30 seconds, or may be set to different values.
In the above-described oven, the first temperature controller 410 is a liquid expansion temperature controller or a temperature limiter. It will be appreciated that the first thermostat 410 may be replaced with other forms of thermostats.
In the above oven, the second temperature controller 420 is an adjustable temperature controller. It is understood that the second temperature controller 420 may be replaced by other switches capable of controlling the on/off of the time ratio.
Referring to fig. 1, in the above-described toaster, the change-over switch 200 further includes a third switch 230 and a fourth switch 240, the live terminal L is connected to one end of the third switch 230 and one end of the fourth switch 240, the other end of the third switch 230 is connected to one end of the first heating element 310, and the other end of the fourth switch 240 is connected to one end of the second heating element 320.
It should be noted that, after the oven exits the energy saving mode, the first switch 210 and the second switch 220 are opened, and at this time, the branch circuit formed by the third switch 230 and the first heating element 310, and the branch circuit formed by the fourth switch 240 and the second heating element 320 are in a parallel connection state, so that the third switch 230 or the fourth switch 240 can be controlled to be closed according to the cooking requirement to supply power to the first heating element 310 or the second heating element 320.
Referring to fig. 1, in the above-described oven, the heating module 300 further includes a third heating element 330, the change-over switch 200 further includes a fifth switch 250, the live end L is connected to one end of the fifth switch 250, and the other end of the fifth switch 250 is connected to one end of the first thermostat 410 through the third heating element 330.
It can be understood that when the oven exits the energy saving mode, the branch circuit formed by the fifth switch 250 and the third heating element 330, the branch circuit formed by the third switch 230 and the first heating element 310, and the branch circuit formed by the fourth switch 240 and the second heating element 320 are in parallel connection, and a plurality of heating elements are arranged, so that different cooking heating requirements can be satisfied.
The first heating element 310, the second heating element 320, and the third heating element 330 may be heating elements of a heating tube, or may be other heating elements such as a heating wire, a halogen tube, and the like.
In addition, it should be noted that in the energy saving mode, the third switch 230, the fourth switch 240 and the fifth switch 250 should be in an off state.
In addition, referring to fig. 1, in the above-mentioned oven, a first snap-action thermostat 500 is further provided between the live wire end L and the change-over switch 200. It should be noted that, the first snap-action thermostat 500 is normally closed, and has a high-temperature snap-off specification.
It can be appreciated that the first snap-action thermostat 500 is provided, so that the power supply to the change-over switch 200 and the heating module 300 can be stopped when the temperature is greater than the temperature protection threshold, thereby realizing the high temperature protection function of the oven.
Referring to fig. 1, in the above oven, a heat radiation fan 600 is disposed between the live wire end L and the neutral wire end N. The cooling fan 600 is arranged, and when the oven needs to be cooled, the cooling fan 600 is started, so that cooling is realized.
Referring to fig. 1, in the above-described oven, a second snap-action thermostat 700 is provided between the firing line end L and the heat radiation fan 600. It should be noted that, the second snap-action thermostat 700 is normally open and has a height Wen Bige.
It can be appreciated that, the second snap-action thermostat 700 is configured to close and conduct when the temperature is greater than the heat dissipation temperature triggering threshold, so as to supply power to the heat dissipation fan 600, so that the heat dissipation fan 600 dissipates heat from the oven.
Referring to fig. 1, in the above oven, the change-over switch 200 further includes a sixth switch 260, and the live wire terminal L is connected to one end of the sixth switch 260, and a furnace lamp 800 is disposed between the other end of the sixth switch 260 and the neutral wire terminal N. The oven lamp 800 is provided to illuminate the inside of the oven.
In addition, referring to fig. 1, a second aspect of the embodiment of the present invention provides an oven including a power access module 100, a change-over switch 200, a heating module 300, and a temperature control module 400; the power access module 100 includes a live line end L and a neutral line end N; the transfer switch 200 includes a first switch 210 and a second switch 220; the heating module 300 includes a first heating element 310 and a second heating element 320; the temperature control module 400 comprises a liquid expansion temperature controller 410 and an adjustable temperature controller 420; the fire wire end L is connected to one end of the first switch 210, the other end of the first switch 210 is connected to one end of the adjustable temperature controller 420, the other end of the adjustable temperature controller 420 is connected to one end of the first heating element 310 and one end of the second heating element 320 through the second switch 220; the other end of the first heating element 310 and the other end of the second heating element 320 are connected to one end of the liquid expansion thermostat 410, and the other end of the liquid expansion thermostat 410 is connected to the zero line end N.
According to the oven provided by the embodiment of the invention, when the power supply access module 100, the change-over switch 200, the heating module 300 and the temperature control module 400 are configured and the first switch 210 and the second switch 220 are closed, the first heating element 310 and the second heating element 320 in the heating module 300 can be connected in parallel, and the first heating element 310 and the second heating element 320 after being connected in parallel are connected in series between the liquid expansion type temperature controller 410 and the adjustable temperature controller 420; controlling the heating module 300 to operate or to stop operating by measuring the oven cavity temperature through the liquid expansion thermostat 410 so that the oven cavity temperature is stabilized near the target set temperature; the temperature controller 420 is used for measuring the ambient temperature of the panel to control the heating module to work or stop working, so that the temperature sensing delay defect caused by the fact that the temperature probe is away from the center of the oven cavity is overcome, the temperature of the oven cavity is far greater than the target set temperature when the heating module 300 stops working, and the temperature of the oven cavity is far less than the target set temperature when the heating module 300 is electrified to work again are avoided, the loss of heat energy is reduced, the energy utilization efficiency of the oven is improved, the temperature control precision is effectively improved, and the cooking effect is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (10)
1. The oven is characterized by comprising a power supply access module, a change-over switch, a heating module and a temperature control module; the power supply access module comprises a live wire end and a zero wire end; the transfer switch comprises a first switch and a second switch; the heating module comprises a first heating element and a second heating element; the temperature control module comprises a first temperature controller and a second temperature controller;
the fire wire end is connected to one end of the first switch, the other end of the first switch is connected to one end of the second temperature controller, and the other end of the second temperature controller is connected to one end of the first heating element and one end of the second heating element through the second switch; the other end of the first heating element and the other end of the second heating element are connected to one end of the first temperature controller, and the other end of the first temperature controller is connected to the zero line end;
in the energy saving mode:
the first switch and the second switch are closed;
the first temperature controller is used for measuring the temperature of the oven cavity, and is opened when the temperature of the oven cavity is higher than a first preset temperature, and is closed when the temperature of the oven cavity is lower than a second preset temperature; the first preset temperature is greater than the second preset temperature;
the second temperature controller is used for measuring the panel environment temperature and alternately switching on and switching off according to a preset time proportion under the condition that the panel environment temperature is larger than a third preset temperature.
2. The oven of claim 1 wherein the alternating on and off of the preset proportion of time comprises:
opening after closing the first preset time period;
and closing after opening the second preset time period.
3. The oven of claim 1 wherein the first temperature controller is a liquid expansion temperature controller or a temperature limiter.
4. The oven of claim 1 wherein the second temperature controller is an adjustable temperature controller.
5. The oven of claim 1 wherein the transfer switch further comprises a third switch and a fourth switch, the hot end being connected to one end of the third switch and one end of the fourth switch, the other end of the third switch being connected to one end of the first heating element, the other end of the fourth switch being connected to one end of the second heating element.
6. The oven of claim 5 wherein the heating module further comprises a third heating element and the change-over switch further comprises a fifth switch, the hot end being connected to one end of the fifth switch, the other end of the fifth switch being connected to one end of the first thermostat through the third heating element.
7. The oven of claim 1 wherein a first snap-action thermostat is also provided between the hot end and the change-over switch.
8. The oven of claim 1 wherein a heat dissipating fan is disposed between the hot and neutral ends.
9. The oven of claim 8 wherein a second snap-action thermostat is disposed between the hot end and the heat dissipating fan.
10. The oven of claim 1 wherein the transfer switch further comprises a sixth switch, the hot end being connected to one end of the sixth switch, a stove light being provided between the other end of the sixth switch and the neutral end.
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| CN112664976A (en) * | 2019-10-15 | 2021-04-16 | 上海酒店设备工程成套南翔厂有限公司 | Gas oven with proportional gas supply |
| CN112135375A (en) * | 2020-09-03 | 2020-12-25 | 广东美的厨房电器制造有限公司 | Microwave cooking device and control method and control device thereof |
| CN112815365A (en) * | 2021-01-04 | 2021-05-18 | 广东美的厨房电器制造有限公司 | Control method of cooking appliance, cooking appliance and storage medium |
| CN113384160A (en) * | 2021-07-14 | 2021-09-14 | 小熊电器股份有限公司 | Power adjusting circuit, power adjusting method and electric chafing dish |
| CN113686458A (en) * | 2021-08-31 | 2021-11-23 | 海信家电集团股份有限公司 | Temperature measurement circuit, temperature measurement equipment and temperature measurement method |
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