CN209965003U - Temperature control device and temperature control protection device for heating aquarium - Google Patents
Temperature control device and temperature control protection device for heating aquarium Download PDFInfo
- Publication number
- CN209965003U CN209965003U CN201822033747.3U CN201822033747U CN209965003U CN 209965003 U CN209965003 U CN 209965003U CN 201822033747 U CN201822033747 U CN 201822033747U CN 209965003 U CN209965003 U CN 209965003U
- Authority
- CN
- China
- Prior art keywords
- heating
- temperature
- aquarium
- water
- temperature control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Farming Of Fish And Shellfish (AREA)
Abstract
The utility model discloses create the embodiment and disclose a temperature control device and control by temperature change protection device for aquarium heating, include: the heating rod is placed in the water and used for heating the water in the aquarium; the mechanical temperature switch is electrically connected with the heating rod and used for controlling the on-off of a circuit of the heating rod; the water temperature sensor is arranged in water and used for detecting the water temperature in the aquarium; the patch heating resistor is used for heating the mechanical temperature switch; and the heating controller is electrically connected with the water temperature sensor and the patch heating resistor respectively and is used for controlling the patch heating resistor to heat according to the water temperature detected by the water temperature sensor. The accuracy of heating temperature control of the water tank can be improved, the sensitivity of water temperature detection is improved, the fluctuation range of water temperature is reduced, and fish growth is facilitated.
Description
Technical Field
The invention relates to the technical field of aquariums, in particular to a temperature control device and a temperature control protection device for heating aquariums.
Background
The fish is a temperature-variable animal, but various fishes have upper and lower limit optimum temperatures for heat resistance and cold resistance, in the optimum temperature range, the fishes have vigorous ingestion, respiration and digestive functions, enhanced metabolism and rapid growth, and the fishes can cause metabolic disorder, inhibit growth and even die after exceeding the optimum temperature range. Temperature control plays a very important role in maintaining a healthy and healthy fish environment. If the water temperature is lower than the proper temperature range of the fish, pathogens can invade the fish body or cause physical frostbite to damage the fish body, so that the fish is more easily invaded by the pathogens, and the fish motility and vitality have a relatively slow tendency. Therefore, electric heater devices are often added to aquariums to increase the temperature of the water within the aquarium.
Generally the electric heater apparatus may comprise: the heating device comprises a heating rod, a temperature control switch and a water temperature sensor, wherein the temperature control switch is used for controlling the temperature control switch to be switched on when the water temperature is lower than the preset temperature so as to realize heating, and controlling the circuit of the heating rod to be switched off when the water temperature is higher than a certain temperature.
The temperature switch is a mechanical temperature switch which uses a bimetallic strip as a temperature sensing element. When the electric appliance works normally, the bimetallic strip is in a free state, the contact is in a closed/open state, when the temperature rises to an action temperature value, the bimetallic element is heated to generate internal stress to act rapidly, the contact is opened/closed, and a circuit is cut off/connected, so that the thermal protection effect is achieved. When the temperature drops to the reset temperature, the contact is automatically closed/opened, and the normal working state is recovered. The bimetallic strip mechanical temperature switch can directly act on the on-off action of 220V mains supply and is suitable for the conduction control of the heating rod of the aquarium.
In the process of realizing the invention, the inventor finds the following technical problems: because the sensitivity of the bimetallic strip to the change of the water temperature is poor, the bimetallic strip is usually lagged behind the change of the water temperature, so that the change range of the water temperature in the aquarium exceeds a reasonable range, and the growth of fishes is influenced.
In the process of realizing the invention, the inventor finds the following technical problems: because the sensitivity of the bimetallic strip to the change of the water temperature is poor, the change of the water temperature is usually lagged behind, so that the change range of the water temperature in the aquarium exceeds a reasonable range, and the growth of fishes is influenced.
Disclosure of Invention
The invention provides a temperature control device and a temperature control protection device for heating an aquarium, and aims to solve the technical problem that a mechanical temperature switch in the prior art is poor in temperature sensitivity.
Accordingly, an embodiment of the present invention provides a temperature control device for aquarium heating, comprising: the heating rod is placed in the water and used for heating the water in the aquarium;
the mechanical temperature switch is electrically connected with the heating rod and used for controlling the on-off of a circuit of the heating rod;
the water temperature sensor is arranged in water and used for detecting the water temperature in the aquarium;
the patch heating resistor is used for heating the mechanical temperature switch;
and the heating controller is electrically connected with the water temperature sensor and the patch heating resistor respectively and is used for controlling heating according to the water temperature detected by the water temperature sensor.
Further, the temperature control device for heating the aquarium further comprises: and one side of the contact heat-conducting medium is fixedly connected with the mechanical temperature switch, and the other side of the contact heat-conducting medium is fixedly connected with the patch heating resistor.
Furthermore, the positions of the contact heat-conducting medium, the patch heating resistor and the mechanical temperature switch, which correspond to each other, are provided with heat-conducting through holes.
Further, the contact heat-conducting medium is a PCB copper plate.
Further, the heating controller includes: and a P1.0 pin of the STC12c5410 chip is electrically connected with the patch heating resistor.
Further, the water temperature sensor includes: the temperature measuring chip is DS18d20, and an I/O port of the DS18d20 temperature measuring chip is electrically connected with a P1.3 pin of the STC12c5410 chip.
According to the temperature control device for heating the aquarium, provided by the invention, the water temperature sensor, the patch heating resistor and the heating controller are additionally arranged, whether the patch heating resistor is heated or not is controlled by utilizing the characteristic of high temperature detection precision of the water temperature sensor, and then the mechanical temperature switch of the patch heating resistor is used for heating, so that the triggering temperature condition of the mechanical temperature switch can be reached in a short time, and the mechanical temperature switch is triggered to act. The trigger temperature condition of the mechanical temperature switch is changed from the water temperature in the aquarium to the temperature generated by the heating of the patch heating resistor, and the heating action of the patch heating resistor is triggered by the water temperature in the aquarium, so that the accuracy of heating temperature control of the water tank can be improved, the sensitivity of water temperature detection is improved, the fluctuation range of the water temperature is reduced, and the fish growth is facilitated.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments thereof, made with reference to the following drawings:
FIG. 1 is a schematic structural view of the front side of a temperature control device for aquarium heating according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the back side of a temperature control device for aquarium heating according to an embodiment of the present invention;
fig. 3 is a partially cut-away schematic view of a temperature control device for aquarium heating according to an embodiment of the present invention.
Wherein:
1. a mechanical temperature switch; 2. a patch heating resistor; 3. a heating controller; 4. a PCB board;
5. a water temperature sensor; 6. and a through hole.
Detailed Description
The invention is described in further detail below with reference to the figures and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. 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 defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
FIG. 1 is a schematic structural view of the front side of a temperature control device for aquarium heating according to an embodiment of the present invention; FIG. 2 is a schematic structural view of the back side of a temperature control device for aquarium heating according to an embodiment of the present invention; fig. 3 is a partially cut-away schematic view of a temperature control device for aquarium heating according to an embodiment of the present invention. Referring to fig. 1, 2 and 3, the temperature control device for aquarium heating includes: a heating rod (not shown) which is put into the water for heating the water in the aquarium; the mechanical temperature switch is electrically connected with the heating rod and used for controlling the on-off of a circuit of the heating rod; the water temperature sensor is arranged in water and used for detecting the water temperature in the aquarium; the patch heating resistor is used for heating the mechanical temperature switch; and the heating controller is electrically connected with the water temperature sensor and the patch heating resistor respectively and is used for controlling the patch heating resistor to heat according to the water temperature detected by the water temperature sensor.
For example, the heating rod can adopt a resistance heating mode, and resistance heating after electrification is utilized to conduct heat conduction through outer-layer metal of the heating rod, so that the purpose of heating water is achieved. The mechanical temperature switch may be integrated with the heating rod or may be provided separately.
In this embodiment, the temperature control device for heating aquarium further includes: and the water temperature sensor is arranged in water and used for detecting the water temperature in the aquarium. The water temperature sensor can detect the change of the water temperature in the aquarium and can convert the collected water temperature into a digital signal through a preset port to send the digital signal. The heating controller can receive a water temperature digital signal sent by the water temperature sensor, and controls the chip resistor to generate heat according to the water temperature digital signal, so that the mechanical temperature switch is heated.
Illustratively, the Chip heating Resistor, i.e., a Chip Fixed Resistor, is one of metal glass enamel resistors. The resistor is made by mixing metal powder and glass glaze powder and printing the mixture on a substrate by a screen printing method, and is moisture-resistant and high-temperature-resistant.
And the heating controller is electrically connected with the water temperature sensor and the patch heating resistor respectively. For example, the heating controller may adopt an STC12c5410 chip, and a P1.0 pin of the STC12c5410 chip is electrically connected to the patch heating resistor. The STC12c5410 chip is a chip with high reliability produced by macro-crystal technology, has a plurality of A/D ports, and has high reliability and high anti-interference performance. And a P1.0 pin of the STC12c5410 chip is electrically connected with the patch heating resistor. Used for controlling the heating of the patch heating resistor. Correspondingly, the water temperature sensor can adopt a DS18d20 temperature measuring chip, and an I/O port of the DS18d20 temperature measuring chip is electrically connected with a P1.3 pin of the STC12c5410 chip. So that the STC12c5410 chip can receive temperature change data and can control the heating of the patch heating resistor according to the temperature collected by the DS18d20 temperature measurement chip.
Illustratively, the temperature control device for aquarium heating further comprises: and one side of the contact heat-conducting medium is fixedly connected with the mechanical temperature switch, and the other side of the contact heat-conducting medium is fixedly connected with the patch heating resistor. The contact heat-conducting medium can be used for fixing the patch heating resistor, the contact heat-conducting medium has good heat conduction efficiency, the patch heating resistor can be fixedly attached to one side of the contact heat-conducting medium, and the mechanical temperature switch can be correspondingly arranged on the other side of the contact heat-conducting medium. Optionally, the technical sheet of the mechanical temperature switch may be correspondingly disposed on the other side contacting the heat conducting medium.
Optionally, the contact heat conducting medium may be a PCB copper plate, and copper is a good thermal conductor. The purpose of quickly conducting the heat generated by the patch heating resistor to the mechanical temperature switch can be achieved. In addition, as the heating controller can adopt an STC12c5410 chip, the dual functions of circuit conduction and heat transfer can be achieved by utilizing the PCB metal plate. Can effectively reduce the volume of the temperature control device used for heating the aquarium.
The present invention will be further described with reference to the operation of the temperature control device for aquarium heating provided by the present invention.
The water temperature sensor and the heating rod are placed in the water in the aquarium, and a certain distance is kept between the water temperature sensor and the heating rod. The interference between the water temperature sensor and the water temperature sensor is avoided, and the deviation of the water temperature detected by the water temperature sensor is caused. When the water temperature is lower than the preset temperature, the heating controller sends a high-level signal to the patch heating resistor through a temperature digital signal sent by the water temperature sensor. The paster heating resistor generates heat and conducts the heat to the mechanical temperature switch, the mechanical temperature switch can be a normally-open switch, the metal sheet of the mechanical temperature switch deforms after being heated, and the mains supply and the heating rod are switched on, so that the heating rod is powered on to heat water in the aquarium.
If the temperature reaches the upper limit of normal temperature, the heating controller no longer sends high level signal, and paster heating resistor no longer generates heat, can dispel the heat away fast through contacting heat-conducting medium, and mechanical type temperature switch's sheetmetal is no longer the actuation, and the commercial power breaks off with the metal rod, accomplishes the water that heats in the aquarium.
According to the temperature control device for heating the aquarium, provided by the invention, the water temperature sensor, the patch heating resistor and the heating controller are additionally arranged, whether the patch heating resistor is heated or not is controlled by utilizing the characteristic of high temperature detection precision of the water temperature sensor, and then the mechanical temperature switch of the patch heating resistor is used for heating, so that the triggering temperature condition of the mechanical temperature switch can be reached in a short time, and the mechanical temperature switch is triggered to act. The trigger temperature condition of the mechanical temperature switch is changed from the water temperature in the aquarium to the temperature generated by the heating of the patch heating resistor, and the heating action of the patch heating resistor is triggered by the water temperature in the aquarium, so that the accuracy of heating temperature control of the water tank can be improved, the sensitivity of water temperature detection is improved, the fluctuation range of the water temperature is reduced, and the fish growth is facilitated.
In a preferred implementation manner of this embodiment, the contact heat conducting medium is provided with a heat conducting through hole at a position corresponding to the patch heating resistor and the mechanical temperature switch. Illustratively, the contact heat-conducting medium can be a PCB copper plate, and the patch heating resistor and the mechanical temperature switch have no metal wiring at a set position of the PCB copper plate, so that a heat-conducting through hole can be formed at a corresponding position of the patch heating resistor and the mechanical temperature switch, thereby facilitating heat exchange and further improving the response speed of the mechanical temperature switch. The accuracy of control by temperature change is improved.
When the temperature of the heated device, i.e., the water in the aquarium, rises to a set temperature during the temperature control by the conventional temperature controller, the temperature controller sends a signal to stop heating. But at this time, the internal temperature of the heating rod or the heating ring is higher than 400 ℃, the heating rod or the heating ring can heat the heated device, even if the temperature control chip sends a signal to stop heating, the temperature of the heated device is still increased by several degrees, and then the temperature of the heated device begins to decrease. When the temperature drops to the lower limit of the set temperature, the temperature controller starts to send a heating signal again to start heating, but a certain time is needed for the heating wire to transfer the temperature to the heated device. Typically, the temperature continues to drop by several degrees as reheating begins. Therefore, the traditional fixed point switch has a phenomenon that the temperature is controlled by a few degrees of positive and negative errors. Temperature drift can occur, which causes the water temperature in the aquarium to fluctuate and affects the growth of fish.
The temperature control device for heating the aquarium, provided by the embodiment, can effectively improve the temperature drift phenomenon. For example, the water temperature detected by the corresponding temperature sensor when the patch heating resistor generates heat may be preset, and the water temperature may be slightly higher than the starting water temperature when the mechanical temperature switch is turned on. And the water temperature detected by the corresponding temperature sensor when the patch heating resistor stops heating can be set to be slightly lower than the water temperature when the mechanical temperature switch is closed. When the water temperature is about to fall to the preset water temperature, the patch heating resistor can be controlled to generate heat, so that the mechanical temperature switch is heated, the mains supply and the heating rod are switched on, and the water begins to be heated. Before can realizing falling to preset water temperature lower limit at the temperature, heat the heating rod in advance to make before the water temperature reduces to preset water temperature lower limit, the heating rod preheats in advance. Correspondingly, when the water temperature is about to rise to the preset water temperature, the heating of the patch heating resistor is stopped, and when the mechanical temperature switch is reduced to a certain temperature, the connection between the heating rod and the mains supply is cut off. The water temperature in the aquarium is heated to the preset upper water temperature limit by utilizing the waste heat of the electric heating rod. The temperature drift can be solved only by setting the corresponding water temperature conditions of the starting and stopping of the patch heating resistor. Compared with the prior art which adopts PID, the water temperature control device has simple structure and low cost, and is particularly suitable for water temperature control of the aquarium.
In order to solve the temperature drift phenomenon, a temperature control device using a silicon controlled rectifier as a temperature control device is currently available. Specifically, a thermistor may be connected in parallel to the input voltage as a voltage dividing resistor, so that the control voltage of the thyristor varies with the voltage dividing resistor. When the measured temperature is lower than the set temperature, the resistance value of the thermistor is larger, the control voltage is higher than the starting voltage, the controllable silicon is conducted, and the electric heater is electrified to start heating. Along with the continuous rising of temperature, the resistance value of thermistor reduces gradually, and control voltage also descends thereupon simultaneously, changes the conduction angle, reaches the purpose of adjusting heating rod voltage, and then has realized the heating degree of heating rod and has carried out the purpose of changing along with the temperature, can effectively solve the drift phenomenon. In the process of realizing the invention, the inventor finds out that the controllable silicon is directly electrically connected with the mains supply, so that the controllable silicon is easy to be punctured when the mains supply is unstable, particularly high voltage is generated instantaneously, the controllable silicon is failed, the controllable silicon is further lost the control capability of closing current, and the water in the aquarium is heated for a long time.
In view of this, the invention also provides a temperature control protection device for heating an aquarium, so as to solve the technical problem of temperature control failure caused by breakdown of a thyristor in the prior art.
For example, the temperature control device for heating the aquarium provided by the above embodiment may be adopted, and the specific configuration thereof is the same as that of the temperature control device for heating the aquarium provided by the above embodiment. The mechanical temperature switch of the temperature control device for heating the aquarium is connected with the controlled silicon in series, namely one end of the mechanical temperature switch is electrically connected with a mains supply, the other end of the mechanical temperature switch is electrically connected with the anode of the controlled silicon, or the cathode of the controlled silicon is electrically connected with the mains supply, the cathode of the controlled silicon is electrically connected with one end of the mechanical temperature switch, and the other end of the mechanical temperature switch is electrically connected with the heating rod.
After breakdown failure of the silicon controlled rectifier, the silicon controlled rectifier is similar to a good conductor, and the heating rod is controlled to heat all the time no matter the water temperature is high or low. After the temperature control protection device is added, whether the commercial power is conducted or not can be controlled by utilizing the high-voltage conduction function of the temperature control switch, so that the protection function is realized.
It is to be noted that the above-mentioned embodiments are only preferred embodiments of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in more detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A temperature control device for aquarium heating, comprising:
the heating rod is placed in the water and used for heating the water in the aquarium;
the mechanical temperature switch is electrically connected with the heating rod and used for controlling the on-off of a circuit of the heating rod;
the water temperature sensor is arranged in water and used for detecting the water temperature in the aquarium;
the patch heating resistor is used for heating the mechanical temperature switch;
and the heating controller is electrically connected with the water temperature sensor and the patch heating resistor respectively and is used for controlling the patch heating resistor to heat according to the water temperature detected by the water temperature sensor.
2. A temperature control device for aquarium heating as defined in claim 1, wherein the temperature control device for aquarium heating further comprises: and one side of the contact heat-conducting medium is fixedly connected with the mechanical temperature switch, and the other side of the contact heat-conducting medium is fixedly connected with the patch heating resistor.
3. The temperature control device for aquarium heating as defined in claim 2, wherein the chip heating resistor is disposed corresponding to the mechanical temperature switch.
4. The temperature control device for aquarium heating as claimed in claim 3, wherein the contact heat-conducting medium is provided with heat-conducting through holes at positions corresponding to the patch heating resistors and the mechanical temperature switch.
5. The temperature control device for aquarium heating as defined in claim 2, wherein the contact heat transfer medium is a PCB copper plate.
6. A temperature control device for aquarium heating as defined in claim 1, wherein the heating controller comprises: and a P1.0 pin of the STC12c5410 chip is electrically connected with the patch heating resistor.
7. A temperature control device for aquarium heating as defined in claim 6, wherein the water temperature sensor comprises: the temperature measuring chip is DS18d20, and an I/O port of the DS18d20 temperature measuring chip is electrically connected with a P1.3 pin of the STC12c5410 chip.
8. A temperature control protection device for aquarium heating, characterized in that, the temperature control device for aquarium heating includes: the temperature control device for aquarium heating and the thyristor as claimed in claim 1, wherein the mechanical temperature switch of the temperature control device for aquarium heating is connected in series with the thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822033747.3U CN209965003U (en) | 2018-12-05 | 2018-12-05 | Temperature control device and temperature control protection device for heating aquarium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822033747.3U CN209965003U (en) | 2018-12-05 | 2018-12-05 | Temperature control device and temperature control protection device for heating aquarium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209965003U true CN209965003U (en) | 2020-01-21 |
Family
ID=69250278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822033747.3U Active CN209965003U (en) | 2018-12-05 | 2018-12-05 | Temperature control device and temperature control protection device for heating aquarium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209965003U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109430154A (en) * | 2018-12-05 | 2019-03-08 | 航之境电子产品（天津）有限公司 | A kind of temperature control device for aquarium heating |
-
2018
- 2018-12-05 CN CN201822033747.3U patent/CN209965003U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109430154A (en) * | 2018-12-05 | 2019-03-08 | 航之境电子产品（天津）有限公司 | A kind of temperature control device for aquarium heating |
| CN109430154B (en) * | 2018-12-05 | 2024-04-02 | 航之境电子产品（天津）有限公司 | Temperature control device for heating aquarium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104078276B (en) | A kind of temperature conditioning unit based on marmem | |
| CN105722256A (en) | Thick film heating assembly, heating device and control method of the heating device | |
| CN209965003U (en) | Temperature control device and temperature control protection device for heating aquarium | |
| US20090139972A1 (en) | Docking connector | |
| CN109430154B (en) | Temperature control device for heating aquarium | |
| WO2017036378A1 (en) | Intelligent heating rod and aquarium | |
| CN208859986U (en) | A kind of evaporator thawing apparatus | |
| CN111214725A (en) | Infusion monitoring method and system based on heat loss | |
| CN107692817A (en) | A kind of Intelligent electric kettle with high-low water level detection | |
| CN105759479B (en) | Liquid crystal heating device and control method with communication function | |
| CN108282916A (en) | Power supply high-temperature protection method, circuit and LED illuminator | |
| CN103196236A (en) | Instantaneous heating body control method based on predictive control | |
| JPH03122992A (en) | Induction heting cooking apparatus | |
| CN207304304U (en) | A kind of closed type centrifugal refrigerating motor junction box body thermostat | |
| CN206354881U (en) | A kind of Intelligent electric kettle detected with high-low water level | |
| US20210134546A1 (en) | Flash double-temperature linkage temperature controller | |
| CN203538135U (en) | Constant-temperature heating pipe for aquarium and constant-temperature aquarium | |
| CN104375540B (en) | The method for controlling internal temp of HD recording equipment | |
| CN206371841U (en) | A kind of food processor | |
| CN206557629U (en) | Direct-heating constant temperature control wind sensor | |
| CN209639132U (en) | A kind of water temperature control device of heat supplier | |
| CN218685223U (en) | Atomizing device and fumigator | |
| CN2133138Y (en) | Electronic constant temp. heating unit with double protection for aquatic animals box | |
| CN212379770U (en) | Constant temperature control device of electric heater | |
| CN220043687U (en) | Dry heating prevention body for electric hot-water bag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |