Intelligent temperature control system and method for electric blanket

Abstract

The present application sets up the heating layer and the control device of the multi-layer electric blanket, selects the heating mode and sequence of the heating layer by detecting the ambient temperature and the change of the temperature of the heating layer itself; selects the uppermost heating layer I to heat when the ambient temperature is low to provide direct heat for the human body; selects the lowermost heating layer III to heat when the ambient temperature is high, and the automatic and controlled conduction of the circuit is completed through the characteristics of the thermistor and the control of the electric switch, so that the temperature of the electric blanket is always in the appropriate interval through the cooperation with the initial heating layer.

Description

Technical Field

[0001] This invention relates to the field of electric blankets; specifically, it relates to an intelligent temperature control system and method for electric blankets. Background Technology

[0002] Temperature control of electric blankets has always been a pressing issue. Currently, there are two types of temperature control for electric blankets: those with and without signals. Electric blankets with signals typically have a heat-sensing layer. When the temperature at any point on the electric blanket exceeds a predetermined value, the heat-sensing layer on the corresponding heating wire changes from an insulator to a good conductor, activating the control circuit and deactivating the electric blanket. For electric blankets without signals, temperature adjustment generally involves using an overheat safety thermostat and a temperature controller. Patent application CN117812762A discloses a heating control circuit and a heating device, including a sampling circuit, a comparison circuit, a main control unit, a first control circuit, and a second control circuit. First, the sampling circuit acquires the temperature voltage characterizing the temperature of the heating element. Then, the comparison circuit adjusts the temperature voltage... A comparison signal is generated based on the relationship with the reference voltage. The main control unit responds to the comparison signal by outputting a pulse control signal to drive the thyristors in the first and second control circuits to turn on or off, thereby controlling the two heating wires to start or stop heating. Utility model patent CN220423649U discloses a zoned temperature-controlled electric blanket. Based on the objective reality that different parts of the human body have different heating and heat dissipation conditions, the electric blanket is adaptively divided into zones, and each zone can achieve independent heating and independent temperature control. However, existing electric blankets cannot control the temperature of the electric blanket according to the ambient temperature and the human body's adaptation needs. They usually only use one heating element. When controlling a single heating element, there is a certain time delay in temperature change, and the electric blanket temperature cannot be automatically adjusted according to changes in ambient temperature. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the aforementioned technical problems, this invention provides an intelligent temperature control system and method for electric blankets.

[0005] (II) Technical Solution

[0006] An intelligent temperature control system and method for an electric blanket; comprising an electric blanket body structure; the electric blanket body structure includes a heat insulation layer, a heating layer I, a heat insulation layer I, a heating layer II, a heat insulation layer II, and a heating layer III; the heat insulation layer is disposed on the top layer; the heating layer I is disposed below the heat insulation layer; the heat insulation layer I is disposed below the heating layer I; the heating layer II is disposed below the heat insulation layer I; the heat insulation layer II is disposed below the heating layer II; and the heating layer III is disposed below the heat insulation layer II.

[0007] Furthermore, three heating electric transmission devices are also provided: electric heating transmission device I, electric heating transmission device II, and electric heating transmission device III; electric heating transmission device I is connected to heating layer I; and electric heating transmission device II is connected to heating layer II.

[0008] Furthermore, the electric heating transmission device I includes an electrode U0; the positive terminal of U0 is connected to a positive thermistor RT via a wire, the other end of the positive thermistor RT extends out of the wire and is connected to a resistor R1 and a comparator U1 via a current branch, the other end of the comparator U1 is connected to a resistor R3 via a wire, the other end of the resistor R3 is connected to one end of a relay J1 via a wire; the other end of the resistor R1 is connected to one end of a circuit switch K1 via a wire; the other end of the circuit switch K1 is led out via a wire; the other end of the wire led out of the circuit switch K1 is connected to the other end of the relay J1, and two current branches are connected on the wire from the circuit switch K1 to the relay J1; a resistor R2 is connected to the first current branch, and a capacitor C1 is connected to the second current branch; the other ends of the two current branches are connected to the wire between the comparator U1 and the relay J1, and a resistor R3 and an electric switch K0 are also provided on the wire between the comparator U1 and the relay J1; the closing of the relay J1 drives the circuit of the electrode Uv to pass current to the heating layer I for electric heating.

[0009] Furthermore, the electric heating transmission device II includes an electrode Uv, the positive terminal of which is connected to one end of a circuit switch K2 via a wire; the other end of the circuit switch K2 is connected to one end of a resistor R7 via a wire; the other end of the resistor R7 is connected to one end of a load heating layer II via a wire; the other end of the load heating layer II is connected to one end of a resistor R8 via a wire; the other end of the resistor R8 is connected to the negative terminal of the electrode Uv; a current shunt is connected in the wire between the positive and negative terminals of Uv; a capacitor C2 is connected in the current shunt; and a temperature detector is connected to the load heating layer II.

[0010] Furthermore, the electric heating transmission device III includes an electrode U0; the positive terminal of U0 is connected to a negative thermistor RS via a wire, the other end of the negative thermistor RS extends out of the wire and is connected to a resistor R4 and a comparator U2 via a current branch, the other end of the comparator U2 is connected to a resistor R6 via a wire, the other end of the resistor R6 is connected to one end of a relay J2 via a wire; the other end of the resistor R4 is connected to one end of a circuit switch K3 via a wire; the other end of the circuit switch K3 is led out via a wire; the other end of the wire led out of the circuit switch K3 is connected to the other end of the relay J2, and two current branches are connected on the wire from the circuit switch K2 to the relay J2; a resistor R5 is connected to the first current branch, and a capacitor C3 is connected to the second current branch; the other ends of the two current branches are connected to the wire between the comparator U2 and the relay J2, and a resistor R6 and an electric switch K0 are also provided on the wire. The closing of the relay J2 drives the circuit of the electrode Uv to conduct current to the heating layer III for electric heating.

[0011] Furthermore, it includes a temperature comparison module, an information transmission module, and a control module. The temperature comparison module compares the ambient temperature detected by the thermistor with the temperature of the electric blanket detected by the temperature detection device, and transmits the comparison information to the control module through the information transmission module.

[0012] Furthermore, the control module controls the three electric heating transmission devices to heat the corresponding heating layers.

[0013] Furthermore, the electric heating transmission device I and the electric heating transmission device III can heat the heating layer I and the heating layer III in an automatic or manual manner.

[0014] Furthermore, each electric heating transmission device is equipped with an overheat protection device and a short-circuit protection device.

[0015] Furthermore; initially, the ambient temperature is detected, and when the ambient temperature is between T0 and T1; the control device closes the electric switch K2, so that the wire between the positive and negative electrodes Uv is connected; the current heats the heating layer II through the electric switch K2 and resistor R7; and a part of the current is diverted to capacitor C2.

[0016] Furthermore, when the ambient temperature is between T0 and T1, the circuits of the electric heating transmission device I and the electric heating transmission device III are not connected when heating layer II is heated; heating layer I and heating layer III are not heated.

[0017] Furthermore, after heating layer II for a fixed time t, it enters the heat preservation stage; the temperature of heating layer II is detected by a temperature detection device; when the ambient temperature drops below T0, the resistance of the positive thermistor RT in the electric heating transmission device I decreases; the current through the wire increases; one end of comparator U1 outputs a high level, causing relay J1 to close; while K0 is in the closed state at the beginning; at this time, the Uv circuit for heating heating layer I is turned on, and heating of heating layer I begins, causing the overall temperature of the electric blanket to rise and directly transfer heat to the human body.

[0018] Furthermore; when the ambient temperature drops below T0 but the temperature of heating layer II is higher than the standard temperature T, the control device disconnects the K0 switch in the electric heating transmission device I, causing the circuit of the electric heating transmission device I to be disconnected and not to heat the heating layer I; if the ambient temperature drops below T0 and the temperature of heating layer II is lower than the standard temperature T, the K0 switch in the electric heating transmission device I is still closed to heat the heating layer I; if the ambient temperature does not drop below T0, the current output by the positive thermistor RT in the electric heating transmission device I is insufficient to cause the comparator U1 to output a high level, causing the relay to close; however, if the temperature of heating layer II is detected to be lower than the standard temperature T and the decreasing trend is obvious, the control device closes the electric switch K1 in the electric heating transmission device I to make the circuit conduct; the current flows through K1, R2, R3, and K0, causing the relay J1 to close and heat the heating layer I.

[0019] Furthermore, when the ambient temperature is detected to rise above T1, the resistance of the positive thermistor RT in the electric heating transmission device I increases, and the control device disconnects the power switch K1, stopping the heating of heating layer I. Meanwhile, the resistance of the negative thermistor RS in the electric heating transmission device III decreases, increasing the current. The comparator U2 receives a high-level signal output, causing the relay J2 to close. The power switch K0 is closed from the beginning, starting to heat heating layer III. At the same time, the power switch K2 in the electric heating transmission device II is disconnected, stopping the heating of heating layer II.

[0020] Furthermore; when the ambient temperature is still between T0 and T1, but the temperature of heating layer II is higher than the standard temperature T; the current output by the negative thermistor RS in the electric heating transmission device III is insufficient to make comparator U2 output a high level to close the relay; at this time, the electric switch K2 in the electric heating transmission device II is disconnected, and heating of heating layer II is stopped; the control device controls the electric switch K3 in the electric heating transmission device III; so that the circuit is turned on and relay J2 is closed, and heating of heating layer III begins.

[0021] (III) Beneficial Effects:

[0022] This invention uses a multi-layered electric blanket with heating layers and a control device to select the heating method and sequence of the heating layers by detecting the ambient temperature and the temperature changes of the heating layers themselves. When the ambient temperature is low, the uppermost heating layer I is selected to provide direct heat to the human body; when the ambient temperature is high, the lowermost heating layer III is selected for heating. The circuit is automatically controlled and turned on by the characteristics of the thermistor and the control of the electric switch. In conjunction with the initial heating layer, the temperature of the electric blanket is always kept within a suitable range. Attached Figure Description

[0023] Appendix Figure 1 This is a schematic diagram of the electric heating transmission device I.

[0024] Appendix Figure 2 This is a schematic diagram of the electric heating transmission device II.

[0025] Appendix Figure 3 This is a schematic diagram of the electric heating transmission device III.

[0026] Appendix Figure 4 This is a picture of an electric heating blanket.

[0027] 1-Insulation layer, 2-Heating layer I, 3-Insulation layer I, 4-Heating layer II, 5-Insulation layer II, 6-Heating layer III. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] An intelligent temperature control system and method for an electric blanket; comprising an electric blanket body structure; the electric blanket body structure includes a heat insulation layer, a heating layer I, a heat insulation layer I, a heating layer II, a heat insulation layer II, and a heating layer III; the heat insulation layer is disposed on the top layer; the heating layer I is disposed below the heat insulation layer; the heat insulation layer I is disposed below the heating layer I; the heating layer II is disposed below the heat insulation layer I; the heat insulation layer II is disposed below the heating layer II; the heating layer III is disposed below the heat insulation layer II; and three heating electric transmission devices are also provided; namely, electric heating transmission device I, electric heating transmission device II, and electric heating transmission device III; electric heating transmission device I is connected to heating layer I; electric heating transmission device II is connected to heating layer II; electric heating transmission device I includes an electrode U0; the positive electrode of U0 is connected to a wire. A positive thermistor RT is connected. One end of the thermistor RT extends out as a wire, through which a current branch connects to resistor R1 and comparator U1. The other end of comparator U1 is connected to resistor R3 via a wire, and the other end of resistor R3 is connected to one end of relay J1 via a wire. The other end of resistor R1 is connected to one end of circuit switch K1 via a wire. The other end of circuit switch K1 is led out via a wire, and the other end of the wire leading from circuit switch K1 is connected to the other end of relay J1. Two current branches are connected to the wire from circuit switch K1 to relay J1; the first current branch is connected to resistor R2, and the second current branch is connected to capacitor C1. The other ends of both current branches are connected between comparator U1 and relay J1. On the wires between comparator U1 and relay J1, resistor R3 and electric switch K0 are also installed; the circuit of relay J1 driving electrode Uv to pass current to heating layer I for heating; the electric heating transmission device II includes electrode Uv, the positive terminal of Uv is led out through a wire and connected to one end of circuit switch K2; the other end of circuit switch K2 is connected through a wire to one end of resistor R7; the other end of resistor R7 is connected through a wire to one end of load heating layer II; the other end of load heating layer II is connected through a wire to one end of resistor R8; the other end of resistor R8 is connected to the negative terminal of electrode Uv, and a current shunt is connected on the wire between the positive and negative terminals of Uv; capacitor C2 is connected to the current shunt; temperature detector is connected to load heating layer II. The measuring device; the electric heating transmission device III includes an electrode U0; the positive terminal of U0 is connected to a negative thermistor RS via a wire, the other end of the negative thermistor RS extends out of the wire and is connected to a resistor R4 and a comparator U2 via a current branch, the other end of the comparator U2 is connected to a resistor R6 via a wire, the other end of the resistor R6 is connected to one end of a relay J2 via a wire; the other end of the resistor R4 is connected to one end of a circuit switch K3 via a wire; the other end of the circuit switch K3 is led out via a wire; the other end of the wire led out of the circuit switch K3 is connected to the other end of the relay J2, and two current branches are connected on the wire from the circuit switch K2 to the relay J2; a resistor R5 is connected to the first current branch, and a capacitor C3 is connected to the second current branch;The other ends of the two current branches are connected to the wire between comparator U2 and relay J2. A resistor R6 and an electric switch K0 are also installed on the wire. The circuit of relay J2's closing drive electrode Uv is connected to supply current to the heating layer III for heating. A temperature comparison module, an information transmission module, and a control module are included. The temperature comparison module compares the ambient temperature detected by the thermistor with the temperature of the electric blanket detected by the temperature detection device, and transmits the comparison information to the control module through the information transmission module. The control module controls the heating method of the three electric heating transmission devices on the corresponding heating layers. Electric heating transmission devices I and III can heat heating layers I and III in automatic and manual modes, respectively. Each electric heating transmission device is equipped with an overheat protection device and a short-circuit protection device.

Claims

1. An intelligent temperature control system for an electric blanket; It includes the main body structure of the electric blanket; the main body structure of the electric blanket is provided from top to bottom with a heat preservation layer, a heating layer I, a heat insulation layer I, a heating layer II, a heat insulation layer II, and a heating layer III; it is also provided with an electric heating transmission device I, an electric heating transmission device II, and an electric heating transmission device III; Electric heating transmission device I is connected to heating layer I; electric heating transmission device II is connected to heating layer II; electric heating transmission device III is connected to heating layer III. Initially, the ambient temperature is detected. When the ambient temperature is between T0 and T1, the circuit of electric heating transmission device II is turned on to heat heating layer II. At this time, the circuits of electric heating transmission device I and electric heating transmission device III are not turned on. After heating layer II for a fixed time t, it enters the heat preservation stage. The temperature of heating layer II is detected by a temperature detection device; When the ambient temperature drops below T0, the circuit of the electric heating transmission device I is turned on to heat the heating layer I; when the ambient temperature drops below T0 but the temperature of the heating layer II is higher than the standard temperature T, the circuit of the electric heating transmission device I is turned off; if the ambient temperature drops below T0 and the temperature of the heating layer II is lower than the standard temperature T, the circuit of the electric heating transmission device I is turned on again; when the ambient temperature rises above T1, the circuit of the electric heating transmission device I is turned off. The circuit of electric heating transmission device III is turned on; at the same time, the circuit of electric heating transmission device II is turned off. When the ambient temperature is detected to be between T0 and T1, but the temperature of heating layer II is higher than the standard temperature T, the circuit of electric heating transmission device II is disconnected and the circuit of electric heating transmission device III is connected.

2. The intelligent temperature control system for the electric blanket according to claim 1; characterized in that: The electric heating transmission device I includes an electrode U0; the positive terminal of U0 is connected to a positive thermistor RT via a wire, the other end of the positive thermistor RT extends out of the wire and is connected to a resistor R1 and a comparator U1 via a current branch, the other end of the comparator U1 is connected to a resistor R3 via a wire, the other end of the resistor R3 is connected to one end of a relay J1 via a wire; the other end of the circuit switch K1 is connected to one end of a circuit switch K1 via a wire; the other end of the circuit switch K1 is led out via a wire; the other end of the wire led out of the circuit switch K1 is connected to the other end of the relay J1, and two current branches are connected on the wire from the circuit switch K1 to the relay J1; a resistor R2 is connected to the first current branch, and a capacitor C1 is connected to the second current branch; the other ends of the two current branches are connected to the wire between the comparator U1 and the relay J1, and a resistor and the circuit switch K0 are also provided on the wire between the comparator U1 and the relay J1; the closing of the relay J1 drives the circuit of the electrode Uv to pass current to the heating layer I for electric heating.

3. The intelligent temperature control system for the electric blanket according to claim 1; characterized in that: The electric heating transmission device II includes an electrode Uv. The positive terminal of Uv is connected to one end of a circuit switch K2 via a wire. The other end of the circuit switch K2 is connected to one end of a resistor R7 via a wire. The other end of the resistor R7 is connected to one end of a load heating layer II via a wire. The other end of the load heating layer II is connected to one end of a resistor R8 via a wire. The other end of the resistor R8 is connected to the negative terminal of the electrode Uv. A current shunt is connected to the wire between the positive and negative terminals of Uv. A capacitor C2 is connected to the current shunt. A temperature detector is connected to the load heating layer II.

4. The intelligent temperature control system for the electric blanket according to claim 1; characterized in that: The electric heating transmission device III includes an electrode U0; the positive terminal of U0 is connected to a negative thermistor RS via a wire, the other end of the negative thermistor RS extends out of the wire and is connected to a resistor R4 and a comparator U2 via a current branch, the other end of the comparator U2 is connected to a resistor R6 via a wire, the other end of the resistor R6 is connected to one end of a relay J2 via a wire; the other end of the resistor R4 is connected to one end of a circuit switch K3 via a wire; the other end of the circuit switch K3 is led out via a wire; the other end of the wire led out of the circuit switch K3 is connected to the other end of the relay J2, and two current branches are connected on the wire from the circuit switch K2 to the relay J2; a resistor R5 is connected to the first current branch, and a capacitor C3 is connected to the second current branch; the other ends of the two current branches are connected to the wire between the comparator U2 and the relay J2, and a resistor R6 and a circuit switch K0 are also provided on the wire. The closing of the relay J2 drives the circuit of the electrode Uv to conduct current to the heating layer III for electric heating.

5. The intelligent temperature control system for the electric blanket according to claim 1; characterized in that: The system includes a temperature comparison module, an information transmission module, and a control module. The temperature comparison module compares the ambient temperature detected by the thermistor with the temperature of the electric blanket detected by the temperature detection device, and transmits the comparison information to the control module through the information transmission module.

6. The intelligent temperature control system for an electric blanket according to claim 1; characterized in that: The control module controls the three electric heating transmission devices to heat the corresponding heating layers.

7. The intelligent temperature control system for an electric blanket according to claim 1; characterized in that: The electric heating transmission device I and electric heating transmission device III can heat heating layer I and heating layer III in automatic and manual modes respectively; each electric heating transmission device is equipped with an overheat protection device and a short circuit protection device.

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