CN220450507U - Heating control circuit and clothes dryer - Google Patents
Heating control circuit and clothes dryer Download PDFInfo
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- CN220450507U CN220450507U CN202321990138.1U CN202321990138U CN220450507U CN 220450507 U CN220450507 U CN 220450507U CN 202321990138 U CN202321990138 U CN 202321990138U CN 220450507 U CN220450507 U CN 220450507U
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- heating element
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 181
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 43
- 239000010703 silicon Substances 0.000 claims abstract description 43
- 238000001035 drying Methods 0.000 claims description 36
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The application provides a heating control circuit and dryer, heating control circuit includes: a heating member; the first control circuit comprises a first relay and a silicon controlled rectifier, the first relay is used for switching on or switching off the heating element, and the silicon controlled rectifier is used for adjusting the heating power of the heating element; the second control circuit comprises a second relay and is used for switching on or switching off the heating element; the heating control circuit is provided with a first working state and a second working state, and in the first working state, the first relay and the controllable silicon are matched to adjust the heating power of the heating element; in the second operating state, the second relay turns on the heating element. The temperature fluctuation caused by the condition that the heating piece starts to heat and is closed can be reduced, and the accuracy of temperature control is improved. And the second control circuit can work when the heating power does not need to be regulated, so that the heating state of the silicon controlled rectifier for a long time is avoided, the reliability of the first control circuit is effectively protected, and the service life of the silicon controlled rectifier can be prolonged.
Description
Technical Field
The application belongs to the technical field of clothes dryers, and particularly relates to a heating control circuit and a clothes dryer.
Background
The electric heating clothes dryer adopts a heating element to heat air and send the air into the inner cylinder, and the hot air exchanges heat with clothes in the inner cylinder to continuously discharge moisture in the clothes, so that the clothes are dried.
The control of drying and heating clothes generally adopts a direct heating mode of a heating element, and the control of the heating element generally controls the on-off of the heating element through a relay so as to achieve the aim of controlling the temperature of an air inlet. The surface temperature can still continuously rise to a certain range due to the hysteresis effect of the heating element, namely, after the heating element is disconnected; after the clothes are cooled to the set temperature, the heating element is started again, and the surface temperature is reduced by a certain range to be increased, so that the vibration amplitude of the actual temperature is greatly different from the target temperature, and the temperature fluctuation in the drum is large, so that the drying of the clothes is affected.
Disclosure of Invention
The embodiment of the application provides a heating control circuit and clothes dryer, which can reduce the temperature fluctuation range of a heating piece and improve the drying effect on clothes.
In a first aspect, embodiments of the present application provide a heating control circuit, including:
a heating member;
the first control circuit comprises a first relay and a controllable silicon, the controllable silicon is connected between the first relay and the heating piece, the first relay is used for switching on or switching off the heating piece, and the controllable silicon is used for adjusting the heating power of the heating piece;
the second control circuit comprises a second relay, the second relay is connected with the heating piece, the second relay is connected with the first relay and the silicon controlled rectifier in parallel, and the second relay is used for switching on or switching off the heating piece;
the heating control circuit is provided with a first working state and a second working state, and in the first working state, the first relay and the silicon controlled rectifier are matched to adjust the heating power of the heating element; in the second working state, the second relay conducts the heating piece.
Optionally, the first control circuit further includes:
the first input end is connected with the first relay and is used for inputting a first control signal so as to switch on or off the first relay;
the second input end is connected with the controllable silicon and is used for inputting a second control signal so as to adjust the heating power of the heating element.
Optionally, the second input end is configured to input the second control signal, where the second control signal adjusts the heating power of the heating element by adjusting a conduction angle of the silicon controlled rectifier.
Optionally, the second control signal is a pulse signal controlled according to an ac zero crossing signal.
Optionally, the second control circuit includes:
the third input end is connected with the second relay and is used for inputting a third control signal so as to conduct or break the second relay, and the third control signal is different from the conduction time sequence of the second relay and the first relay controlled by the first control signal.
Optionally, the first relay and the second relay are both connected with a live wire;
one end of the heating element is connected with the first control circuit and the second control circuit respectively, and the other end of the heating element is connected with a zero line.
Optionally, the first input end is connected with the first relay through a first triode;
the second input end is connected with the silicon controlled rectifier through a second triode;
the third input end is connected with the second relay through a third triode.
In a second aspect, embodiments of the present application further provide a clothes dryer, including:
a heating control circuit as claimed in any one of the preceding claims.
Optionally, the clothes dryer further comprises an inner cylinder and a temperature sensor, wherein the inner cylinder is used for bearing clothes, the temperature sensor is arranged at the air inlet of the inner cylinder, and the temperature sensor is electrically connected with the first control circuit so as to adjust the heating power of the heating element according to the temperature of the inner cylinder.
Optionally, the first working state and the second working state correspond to different drying procedures of the clothes dryer or correspond to different drying stages of the same drying procedure of the clothes dryer.
In heating control circuit and dryer that this application embodiment provided, through setting up first control circuit control and flowing through the electric current size of heating piece, can realize the adjustment of heating piece heating power, need not to close or open the action of heating piece, can reduce because of heating piece begins heating and close the temperature fluctuation that leads to under the heating condition, and then improve temperature control's precision. And the second control circuit can work when the heating power does not need to be regulated, so that the heating state of the silicon controlled rectifier for a long time is avoided, the reliability of the first control circuit is effectively protected, and the service life of the silicon controlled rectifier can be prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort to a person skilled in the art.
For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts throughout the following description.
Fig. 1 is a schematic structural view of a clothes dryer according to an embodiment of the present application.
Fig. 2 is a block diagram of a heating control circuit according to an embodiment of the present application.
Fig. 3 is a schematic diagram of a first structure of a heating control circuit according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a second structure of a heating control circuit according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a clothes dryer according to an embodiment of the present application. The embodiment of the present application provides a dryer 1, the dryer 1 may be a dryer having only a drying function, and the dryer 1 may be a washing and drying integrated machine having a washing function and a drying function, which is not particularly limited herein. The dryer 1 may be an electric heating type dryer, that is, a drying type in which air is heated by a heating member and heated hot air is fed into an inner drum to exchange heat with laundry in the inner drum, thereby continuously discharging moisture in the laundry.
The control of drying and heating clothes generally adopts a direct heating mode of a heating element, and the control of the heating element generally controls the on-off of the heating element through a relay so as to achieve the aim of controlling the temperature of an air inlet. The surface temperature can still continuously rise to a certain range due to the hysteresis effect of the heating element, namely, after the heating element is disconnected; after the clothes are cooled to the set temperature, the heating element is started again, and the surface temperature is reduced by a certain range to be increased, so that the vibration amplitude of the actual temperature is greatly different from the target temperature, and the temperature fluctuation in the drum is large, so that the drying of the clothes is affected.
In order to reduce the occurrence of the above-described situation, the embodiment of the present application improves the heating control circuit, and will be described below with reference to the accompanying drawings.
The dryer 1 includes the heating control circuit 10 by way of example, and of course, the dryer 1 may include other components such as a cabinet, an inner tub, a display screen, etc., and is not particularly limited herein, but should not be construed as limiting the structural composition of the dryer 1. Also, the heating control circuit 10 may be applied not only to the dryer 1 but also to other heating appliances such as an induction cooker, a water heater, etc., and the embodiment of the present application is described taking the application of the heating control circuit 10 to the dryer 1 as an example, and should not be construed as limiting the heating control circuit 10.
Referring to fig. 1 in combination with fig. 2 and fig. 3, fig. 2 is a block diagram of a heating control circuit according to an embodiment of the present application, and fig. 3 is a schematic diagram of a first structure of the heating control circuit according to an embodiment of the present application. The heating control circuit 10 includes a heating element 11, a first control circuit 12, and a second control circuit 13.
The heating element 11 is used for heating air for heat exchange with the laundry in the drum. For example, the heating element 11 may be an electric heating tube, i.e. a device that can generate heat by energizing the heating element 11.
The first control circuit 12 includes a first relay K1 and a silicon controlled rectifier S connected between the first relay K1 and the heating member 11. The first relay K1 is used to turn on or off the heating element 11. The silicon controlled rectifier S is used for adjusting the heating power of the heating element 11 so as to adapt to different drying programs or different stages of the same drying program, and the heating temperature does not need to be adjusted by controlling the closing or opening of the heating element 11, so that the influence of temperature fluctuation of the heating element 11 on the temperature of the inner cylinder can be reduced, and the drying effect is improved.
The second control circuit 13 includes a second relay K2, the second relay K2 is connected to the heating element 11, and the second relay K2 is connected in parallel with the first relay K1 and the silicon controlled rectifier S. The second relay K2 is used to turn on or off the heating element 11.
Wherein the heating control circuit 10 has a first operating state and a second operating state. In the first operating state, the first relay K1 and the thyristor S cooperate to adjust the heating power of the heating element 11. In the second operating state, the second relay K2 switches on the heating element 11.
In the heating control circuit 10 provided by the embodiment of the application, the first control circuit 12 is arranged to control the current flowing through the heating element 11, so that the adjustment of the heating power of the heating element 11 can be realized, the action of closing or opening the heating element 11 is not needed, the temperature fluctuation caused by the heating of the heating element 11 and the heating condition of closing can be reduced, and the accuracy of temperature control is improved. In addition, the second control circuit 13 can work when the heating power does not need to be adjusted, so that the heating state of the silicon controlled rectifier S for a long time is avoided, the reliability of the first control circuit 12 is effectively protected, and the service life of the silicon controlled rectifier S can be prolonged.
For the first control circuit 12, a silicon controlled rectifier S circuit is connected in series behind the first relay K1, and since the silicon controlled rectifier S is a contactless semiconductor component, the silicon controlled rectifier S can be rapidly turned on and off, thereby realizing uniformity of a heating process. Meanwhile, when the first relay K1 acts, the controllable silicon S is controlled to be disconnected, at the moment, the heating loop is disconnected, and no current is generated when the first relay K1 acts, so that contacts cannot be ablated. The control of the silicon controlled rectifier S can be performed according to the zero crossing point of the alternating voltage. And calculating how long the silicon controlled rectifier S starts to conduct after the zero crossing point according to the heating power requirement. Thus, timing is started at the zero crossing point of the alternating voltage, and the silicon controlled rectifier S is controlled to be conducted when the timing is reached. And controlling the silicon controlled rectifier S to cut off until a new zero crossing point. And (5) timing again, and conducting again when the conducting time is reached, and repeating the steps. The thyristor S can be operated hundreds of times per second, so that the heating process is uniform.
It should be noted that, in the drying process of the clothes dryer 1, the second relay K2 may be directly turned on, so that the first control circuit 12 does not need to work, the silicon controlled rectifier S is prevented from being used in a heating state for a long time, and the reliability of the circuit is effectively protected. When the drying power is changed, the first control circuit 12 is started, so that the heating element 11 can be flexibly controlled, and the service life of the silicon controlled rectifier S is effectively prolonged. The above-mentioned, i.e. the second operating state and the first operating state, the first operating state and the second operating state may correspond to different drying procedures of the dryer 1, or to different drying phases of the same drying procedure of the dryer 1.
Wherein, to different clothing materials, can adopt different stoving procedure, the electric current setting of the corresponding heating member 11 of different stoving procedure is different, namely control air intake NTC temperature for stoving temperature is different in the inner tube, avoids the clothing to damage clothing fibre under the high temperature state, and the maximize utilizes suitable temperature to carry out quick drying. For example, the drying temperature in the cotton clothes setting inner cylinder is 80 ℃ or a temperature close to 80 ℃, the wool fabrics setting inner cylinder is dried at a value ranging from 35 ℃ to 40 ℃, the optimal drying temperature setting can be carried out on different materials, and the drying experience of a user using the clothes dryer 1 is improved.
Wherein, for different drying stages of the same drying program, the heating power of the heating element 11 is controlled in time, so that the drying effect can be improved. For example, the heating power of the heating element 11 is raised as much as possible in the initial drying stage, so that the temperature in the inner cylinder is raised rapidly, which is beneficial to the rapid evaporation of the fabric moisture. In the middle drying stage, the temperature in the inner cylinder reaches an equilibrium state, the heating power of the heating element 11 can be properly reduced, the temperature in the inner cylinder is kept constant, constant-temperature drying is carried out, and the inner cylinder is in an optimal water removal state. At the end of drying, the water content of the clothes is less and less, the heating power of the heating element 11 is reduced, the temperature in the inner cylinder is reduced, the clothes are prevented from being excessively dried and wrinkled to influence the irreversible damage of fabric fibers, and the optimal drying effect is achieved.
Illustratively, the first control circuit 12 further includes a first input terminal P1 and a second input terminal P2. The first input terminal P1 is connected to the first relay K1, and the first input terminal P1 is configured to input a first control signal to turn on or off the first relay K1. It can be understood that the first control signal input by the first input end P1 is mainly used for controlling the on-off of the first relay K1, so as to realize the control of the on and off of the heating element 11.
The first input end P1 is connected with the first relay K1 through a first triode Q1, that is, a base electrode of the first triode Q1 is connected with the first input end P1, an emitter electrode of the first triode Q1 is grounded GND, a collector electrode of the first triode Q1 is connected with the first relay K1, and the first triode Q1 is turned on or turned off by a first control signal input by the first input end P1, so that the on and off of the first relay K1 are controlled.
The second input terminal P2 is connected to the thyristor S, and the second input terminal P2 is used for inputting a second control signal to adjust the heating power of the heating element 11. The second control signal adjusts the current of the heating element 11 by adjusting the conduction angle of the thyristor S, thereby adjusting the heating power. For example, the second control signal may be a pulse signal controlled by an ac zero crossing signal.
The second input terminal P2 is connected to the silicon controlled rectifier S through a second triode Q2, that is, a base electrode of the second triode Q2 is connected to the second input terminal P2, an emitter electrode of the second triode Q2 is grounded GND, a collector electrode of the second triode Q2 is connected to the silicon controlled rectifier S, and a second control signal input through the second input terminal P2 turns on or off the second triode Q2, so as to control a conduction angle of the silicon controlled rectifier S and heating power of the heating element 11.
The second control circuit 13 includes a third input P3, and the third input P3 is connected to the second relay K2 through a third transistor Q3. The third input terminal P3 is used for inputting a third control signal to turn on or off the second relay K2. The conduction time sequence of the third control signal is different from that of the second relay K2 and the first relay K1 controlled by the first control signal, and it can be understood that the first relay K1 and the second relay K2 are conducted in a time-sharing manner, so that the method can adapt to different working states of the heating control circuit 10.
The base electrode of the third triode Q3 is connected to the third input end P3, the emitter electrode of the third triode Q3 is grounded GND, the collector electrode of the third triode Q3 is connected to the second relay K2, and the third triode Q3 is turned on or off by a third control signal input from the third input end P3, so as to control the on or off of the second relay K2 and the on or off of the heating element 11.
Illustratively, the first relay K1 and the second relay K2 are both connected to the hot line L. One end of the heating element 11 is respectively connected with the first control circuit 12 and the second control circuit 13, and the other end of the heating element 11 is connected with the zero line N, so that electric energy can be provided for the heating control circuit 10 to facilitate the operation of the heating element 11.
The first relay K1 is further connected with a power supply VDD, which may be 12V, and the power supply VDD is used for supplying power to the first relay K1.
For example, please refer to fig. 1 to 3 in combination with fig. 4, fig. 4 is a schematic diagram of a second structure of a heating control circuit according to an embodiment of the present application. The dryer 1 includes an inner tub 20 and a temperature sensor 30. The drum 20 is for carrying laundry. The temperature sensor 30 is disposed at an air inlet (not shown) of the inner cylinder 20, and the temperature sensor 30 is electrically connected to the second input terminal P2 to adjust the second control signal according to the temperature of the inner cylinder 20. It is understood that the temperature detected by the temperature sensor 30 may serve as a feedback signal for the conduction angle adjustment of the thyristor S, and the accuracy of the temperature of the heating element 11 may be improved. For example, when the temperature detected by the temperature sensor 30 is greater than the target temperature, the conduction angle of the silicon controlled rectifier S can be adjusted by adjusting the second control signal, so as to reduce the heating power of the heating element 11, thereby making the temperature of the inner cylinder 20 approach the target temperature.
In order to reduce the drying temperature error, the heating control circuit 10 of the embodiment of the application increases the control accuracy of the heating element 11, and adopts the first control circuit 12 to carry out electrodeless smooth control on the current of the heating element 11 to obtain corresponding heating power, then detects the current temperature through the temperature sensor of the temperature air inlet in the inner cylinder, continuously compares with the target temperature, carries out PID (proportion integration differentiation) adjustment to infinitely approach the target temperature, realizes the full-automatic intelligent detection control of the drying temperature control in the real sense, solves the problems of low-temperature drying or uneven temperature, overhigh temperature and other temperatures of the condensing type clothes dryer in the market, and furthest meets the drying requirement of users.
In the heating control circuit 10 and the clothes dryer 1 provided by the embodiment of the application, the first control circuit 12 is arranged to control the current flowing through the heating element 11, so that the adjustment of the heating power of the heating element 11 can be realized, the action of closing or opening the heating element 11 is not needed, the temperature fluctuation caused by the heating element 11 starting to heat and the heating condition of closing can be reduced, and the accuracy of temperature control is further improved. In addition, the second control circuit 13 can work when the heating power does not need to be adjusted, so that the heating state of the silicon controlled rectifier S for a long time is avoided, the reliability of the first control circuit 12 is effectively protected, and the service life of the silicon controlled rectifier S can be prolonged.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
In the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features.
The heating control circuit and the clothes dryer provided by the embodiment of the application are described in detail, and specific examples are applied to illustrate the principle and the implementation of the application, and the description of the above embodiments is only used for helping to understand the method and the core idea of the application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the contents of the present specification should not be construed as limiting the present application in summary.
Claims (10)
1. A heating control circuit, comprising:
a heating member;
the first control circuit comprises a first relay and a controllable silicon, the controllable silicon is connected between the first relay and the heating piece, the first relay is used for switching on or switching off the heating piece, and the controllable silicon is used for adjusting the heating power of the heating piece;
the second control circuit comprises a second relay, the second relay is connected with the heating piece, the second relay is connected with the first relay and the silicon controlled rectifier in parallel, and the second relay is used for switching on or switching off the heating piece;
the heating control circuit is provided with a first working state and a second working state, and in the first working state, the first relay and the silicon controlled rectifier are matched to adjust the heating power of the heating element; in the second working state, the second relay conducts the heating piece.
2. The heating control circuit of claim 1, wherein the first control circuit further comprises:
the first input end is connected with the first relay and is used for inputting a first control signal so as to switch on or off the first relay;
the second input end is connected with the controllable silicon and is used for inputting a second control signal so as to adjust the heating power of the heating element.
3. The heating control circuit of claim 2, wherein the second input terminal is configured to input the second control signal, and the second control signal is configured to adjust the heating power of the heating element by adjusting a conduction angle of the thyristor.
4. The heating control circuit of claim 2, wherein the second control signal is a pulse signal controlled in accordance with an ac zero crossing signal.
5. The heating control circuit of claim 2, wherein the second control circuit comprises:
the third input end is connected with the second relay and is used for inputting a third control signal so as to conduct or break the second relay, and the third control signal is different from the conduction time sequence of the second relay and the first relay controlled by the first control signal.
6. The heating control circuit of claim 5, wherein the first relay and the second relay are both connected to a hot wire;
one end of the heating element is connected with the first control circuit and the second control circuit respectively, and the other end of the heating element is connected with a zero line.
7. The heating control circuit of claim 5, wherein the first input is connected to the first relay via a first transistor;
the second input end is connected with the silicon controlled rectifier through a second triode;
the third input end is connected with the second relay through a third triode.
8. A clothes dryer, comprising:
a heating control circuit as claimed in any one of claims 1 to 7.
9. The clothes dryer of claim 8 further comprising an inner drum for carrying clothes and a temperature sensor disposed at the inner drum air intake, the temperature sensor being electrically connected to the first control circuit to adjust the heating power of the heating element based on the temperature of the inner drum.
10. The clothes dryer of claim 8, wherein the first operating state and the second operating state correspond to different drying programs of the clothes dryer or to different drying stages of the same drying program of the clothes dryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321990138.1U CN220450507U (en) | 2023-07-25 | 2023-07-25 | Heating control circuit and clothes dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321990138.1U CN220450507U (en) | 2023-07-25 | 2023-07-25 | Heating control circuit and clothes dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220450507U true CN220450507U (en) | 2024-02-06 |
Family
ID=89733649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321990138.1U Active CN220450507U (en) | 2023-07-25 | 2023-07-25 | Heating control circuit and clothes dryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220450507U (en) |
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2023
- 2023-07-25 CN CN202321990138.1U patent/CN220450507U/en active Active
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