CN114578880B - An energy-saving constant temperature control box and its preparation method - Google Patents

Abstract

The invention discloses an energy-saving constant temperature control box and a preparation method thereof. The constant temperature control box includes a hydrogel box, a cold light source arranged outside the hydrogel box, and a temperature control system arranged in the hydrogel box, wherein the temperature control system includes a heater, a combined temperature-light intensity sensing device, Relay and power supply, the temperature-light intensity joint sensing device is opposite to the cold light source, the temperature-light intensity joint sensing device includes hydrogel and photoresistor, and the hydrogel in the hydrogel box and the temperature-light intensity joint sensing device are all It is a temperature-sensitive hydrogel whose transparency changes with temperature. The invention senses the ambient temperature through the hydrogel to change its transparency, and then changes the resistance value of the photoresistor to control the on-off of the heater. At the same time, it can effectively reduce the diffusion of heat inside the system and block the heat input from the external environment, reducing The energy consumption of heating and cooling equipment keeps the temperature of the environment in a relatively stable range and has an energy-saving effect.

Description

An energy-saving constant temperature control box and its preparation method

technical field

The invention relates to the field of energy-saving constant temperature control materials, in particular to an energy-saving constant temperature control box and a preparation method thereof.

Background technique

The constant temperature control system has a wide range of applications in many fields such as biological cultivation and item storage. However, at present, the constant temperature control system often uses temperature sensors as temperature control modules with relatively single functions. The cabinets are generally made of glass, metal, etc., and usually do not have thermal insulation performance. The energy consumption is high, and the box body with thermal insulation performance is generally opaque, so it is difficult to observe the environment inside the box. On the other hand, the hydrogel soft matter material has a three-dimensional network structure and abundant water, which makes it soft and tough, so that it can adapt to various curved or irregular surfaces. And because it contains abundant water, it can absorb a large amount of heat, and can be used as a window for energy-saving temperature control. On this basis, the hydrogel with phase transition response to external environmental stimuli can spontaneously regulate energy input and block, further reducing energy consumption. Under the background of global energy shortage, the application of such hydrogel materials in the field of energy saving and temperature control has great practical value.

Among all kinds of reversible phase transition hydrogels, thermosensitive hydrogels have a phase transition temperature, which can respond to changes in environmental temperature, from a fully transparent energy input state at one temperature to another. An energy-blocking state that is opaque at temperature. The entire response process is directly regulated by the ambient temperature and sunlight without additional energy supply, and it is the most widely studied energy-saving hydrogel. For example, Solar Energy Materials and Solar Cells, 2021, 232, 111348 reported a hydroxypropyl cellulose-polyacrylamide hydrogel. When the temperature is higher than 40°C, the hydrogel changes from transparent to white, which can block sunlight. Bring the heat. However, the current exploration of applying the energy-saving properties of hydrogel materials to practical scenarios is very limited, and most of them are limited to the study of the structure and properties of hydrogels.

Contents of the invention

Aiming at the deficiencies of the prior art, the invention provides an energy-saving constant temperature control box and a preparation method thereof.

In order to achieve the purpose of the present invention, an energy-saving constant temperature control box provided by the present invention includes a hydrogel box, a cold light source arranged outside the hydrogel box, and a temperature control system arranged inside the hydrogel box,

The temperature control system includes a heater, a temperature-light intensity combined sensing device, a relay and a power supply, the temperature-light intensity combined sensing device is connected to the heater and the relay by wires, and the power supply is connected to the heater and the relay by wires;

Moreover, the temperature-light intensity joint sensing device is set opposite to the cold light source, the temperature-light intensity joint sensing device includes a temperature-sensitive hydrogel and a photoresistor, one side of the temperature-sensitive hydrogel is opposite to the cold light source, and the photosensitive The resistance is set on the other side of the thermosensitive hydrogel;

The hydrogel in the hydrogel box and the hydrogel in the combined temperature-light intensity sensing device are temperature-sensitive hydrogels whose transparency changes with temperature.

Using the control box of the aforementioned scheme, the hydrogel used in the hydrogel box and the temperature-light intensity combined sensing device is a temperature-sensitive color-changing hydrogel, and the transparency of the photoresistor is changed by sensing the ambient temperature through the hydrogel. The resistance value of the control box changes to control the on-off of the heater. At the same time, due to the use of temperature-sensitive hydrogel, the control box can effectively reduce the diffusion of heat inside the system and block the heat input from the external environment, reducing the use of heating and cooling equipment Energy consumption, so that the temperature of the environment is kept in a relatively stable range, and at the same time it has the effect of saving energy.

Further, the hydrogel casing is a casing made of temperature-sensitive hydrogel whose transparency changes with temperature.

Further, the inner wall or outer wall of the hydrogel box is pasted with a temperature-sensitive hydrogel whose transparency changes with temperature, the inner wall may be all or part of the inner wall of the box, and the outer wall may be the entire inner wall of the box. The outer wall or part of the outer wall.

Further, the combination of the hydrogel and the photoresistor in the combined temperature-light intensity sensing device is an attachment type, that is, the photoresistor is attached to the side of the hydrogel facing away from the cold light source.

Further, the combination of the hydrogel and the photoresistor in the combined temperature-light intensity sensing device is embedding, that is, the photoresistor is embedded inside the hydrogel.

The preparation method of the energy-saving constant temperature control system described above comprises the following steps:

(1) Preparation of temperature-sensitive hydrogel whose transparency changes with temperature: Add inorganic salt, hydroxypropyl methylcellulose, acrylamide monomer, and cross-linking agent to deionized water in sequence, stir evenly to obtain a mixed solution, and pass it into The inert gas removes the oxygen in the mixed solution, then adds the initiator and stirs evenly to obtain a hydrogel reaction solution, injects the reaction solution into a mold and seals it, and obtains a temperature-sensitive hydrogel whose transparency changes with temperature through a polymerization reaction;

(2) Preparation of hydrogel casing: use the temperature-sensitive hydrogel whose transparency varies with temperature prepared in step (1) to make a hydrogel casing; or use the temperature-sensitive hydrogel whose transparency varies with temperature prepared in step (1) The gel is attached to the inner wall or outer wall of the box to make a hydrogel box;

(3) Preparation of temperature-light intensity combined sensing device: attach the photoresistor to one side of the temperature-sensitive hydrogel whose transparency changes with temperature prepared by step (1), or embed it in the transparent hydrogel prepared by step (1) The interior of the temperature-sensitive hydrogel that changes with temperature is prepared to obtain the temperature-light intensity combined sensing device;

(4) Preparation of temperature control system: the temperature-light intensity combined sensing device obtained in step (3) is electrically connected to a relay, the heater is connected to the power supply with a relay, and the relay is controlled by the temperature-light intensity combined sensor On and off, and then control the on and off of the power supply of the heater through the relay;

(5) Preparation of energy-saving constant temperature control system: the cold light source is placed outside the hydrogel box, the temperature control system is placed inside the hydrogel box, and the temperature-light intensity joint induction The position of the device is directly facing the cold light source, so that the light emitted by the cold light source passes through the hydrogel in the combined temperature-light intensity sensing device and then irradiates the photoresistor.

Further, lithium chloride, sodium chloride, and potassium chloride are used as the inorganic salt in step (1), and acrylamide monomers include acrylamide, N,N-dimethylacrylamide, N,N-diethyl Any one of acrylamide, the crosslinking agent is N,N'-methylenebisacrylamide, the inert gas is any one of nitrogen and argon, and the initiator is potassium persulfate or ammonium persulfate.

Further, the concentration of the inorganic salt in step (1) relative to deionized water is 0-0.35 g/mL, the concentration of hydroxypropyl methylcellulose relative to deionized water is 0.01-0.10 g/mL, and the concentration of acrylamide The concentration of the acrylamide monomer relative to the deionized water is 2-5mol/L, the molar ratio of the crosslinking agent to the acrylamide monomer is 0.1% to 1.5%, and the molar ratio of the initiator to the acrylamide monomer is 0.2% ~0.5%, the polymerization reaction is carried out at 60~80°C for 8~24 hours.

Further, in step (3), the resistance value of the photoresistor used as a switch varies in a range of 3-150 kΩ.

Further, in step (4), the working voltage of the relay of the constant temperature control system is 5-12V DC, the working voltage of the heater is 125-250V AC or 28-30V DC, and the cold light source is an LED lamp.

Further, the working method of the energy-saving constant temperature control box includes the following steps:

(1) When the temperature in the energy-saving constant temperature control box is low, the hydrogel in the temperature-light intensity combined sensing device is in a transparent state, and the resistance of the photoresistor is small under the irradiation of a cold light source, and the relay connected to it is energized state, connect the power supply to the heater, the heater works, and the ambient temperature in the box rises;

(2) When the temperature in the box rises to a certain level, the hydrogel in the temperature-light intensity combined sensing device becomes opaque, the light intensity received by the photoresistor weakens, the resistance value increases accordingly, and the relay becomes In the power-off state, cut off the connection between the heater and the power supply, so that it stops heating and the temperature in the box stops rising;

(3) When the temperature in the box is lowered to a certain temperature, the hydrogel turns back to a transparent state, the resistance of the photoresistor decreases, the relay becomes energized, and the heater starts up again to heat up the incubator;

(4) Steps (1) to (3) are carried out reciprocally, so that the temperature in the box is stabilized within a certain temperature range;

(5) During the use of the constant temperature control box, the temperature rise causes the hydrogel to become opaque, and in the box composed of the hydrogel, the transmission of heat inside the system to the environment outside the system is greatly reduced, making the inside of the box Slow down the temperature drop, which can reduce the working time of the heater; on the other hand, the high ambient temperature will also cause the phase change of the hydrogel in the control box, the transparency will decrease, and the radiation of external heat to the constant temperature control box will be blocked. In this way, the temperature in the system can be kept constant without additional cooling equipment. The combination of these two aspects makes the thermostat energy-saving.

Compared with the prior art, the present invention has at least the following beneficial effects:

1. The constant temperature control box provided by the present invention has both the functions of constant temperature and energy saving. According to the working mechanism of this constant temperature control box, the temperature of the environment in the constant temperature box can be kept in a stable range, that is, the effect of constant temperature can be realized; at the same time, at low temperature, that is, the ambient temperature is as low as the set value, and the hydrogel is transparent. When the temperature in the box is high, the heater will be turned on. After the temperature in the box rises, the hydrogel becomes opaque, and the resistance of the photoresistor increases, so that the heater stops working. The opaque hydrogel can reduce the heat in the box from spreading outward. , so that the thermal insulation performance of the box is improved and the use time of the heater is reduced; in addition, when the external temperature is high, the opaque hydrogel can effectively prevent the radiant heat from the outside, so that the temperature inside the box will not rise too fast, and there is no need to connect another The refrigerator can achieve the cooling effect in the box, and this transparency-temperature synergistic adjustment function enables the thermostatic control box to achieve high-efficiency energy-saving effects.

2. The core temperature-light intensity combined sensing device in the present invention has the characteristics of adjustable transparency and heat insulation. Compared with temperature-sensitive resistors, the temperature-sensing component is transparent and adjustable in transparency, which is convenient for observing the situation inside the box; compared with fully transparent glass, it has the function of heat insulation, which can effectively reduce energy consumption and achieve energy-saving effects.

3. The raw materials used in the present invention are easy to get, the formula is simple, and the preparation is simple. The functional component hydroxypropyl methylcellulose is a derivative of cellulose and has a wide range of sources; inorganic salts used to adjust the phase transition of hydrogels are commonly used salts; acrylamide monomers, crosslinking agents, and initiators are Commonly used pharmaceuticals for the synthesis of hydrogels. The hydrogels are directly polymerized by a "one-pot method", which is simpler than the synthesis of traditional hydrogels.

4. In the present invention, the wide and narrow conversion of the photothermal modulation range of the hydrogel material can be realized by simply adjusting the concentration of hydroxypropyl methylcellulose or inorganic salts. The degree of phase change of the adhesive material can be changed in depth, so that it can adapt to the situation of large or small temperature difference in the environment, and the operation is simple and the effect is remarkable.

5. In the present invention, the phase transition temperature range of the hydrogel material is easily adjustable, which can be realized by simply changing the concentration of the inorganic salt.

6. The hydrogel material in the present invention has good flexibility. Compared with traditional hard glass or temperature control windows made of other materials, it can better adapt to various flat and curved surfaces, and has more application scenarios and application prospects. wider.

Description of drawings

Fig. 1 is a schematic structural diagram of an energy-saving constant temperature control box provided by an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an attached temperature-light intensity combined sensing device provided by an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of an embedded temperature-light intensity combined sensing device provided by an embodiment of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the examples. For the hydrogel obtained in the examples, the mold used for synthesis is composed of two glass plates sandwiching a gasket, and the reaction solution is polymerized in the cavity to form a sheet-shaped hydrogel. The method disclosed in Zhang et al. Adv. Funct. Mater. 2018, 28, 1707245 was used to measure the tensile strength and elongation at break of the hydrogel. These examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.

An energy-saving constant temperature control box provided by the present invention includes a hydrogel box body 1, a cold light source 2 arranged outside the hydrogel box body 1, and a temperature control system arranged inside the hydrogel box body 1. The temperature control The system includes a heater 3, a temperature-light intensity combined sensing device 4, a relay 5 and a power supply 6, the temperature-light intensity combined sensing device 4 is connected to the heater 3 and the relay 5 by wires, and the power supply 6 is connected to the heater 3 and the relay 5. wire connection; and, the temperature-light intensity combined sensing device 4 is set opposite to the cold light source 1, the temperature-light intensity combined sensing device includes a temperature-sensitive hydrogel 8 and a photoresistor 9, and one side of the temperature-sensitive hydrogel 8 Opposite to the cold light source 2, the photoresistor 9 is arranged on the other side of the temperature-sensitive hydrogel 8; the hydrogel in the hydrogel box 1 and the hydrogel in the combined temperature-light intensity sensor 4 are all It is a thermosensitive hydrogel whose transparency changes with temperature.

Wherein, the photoresistor 9 is connected with the heater 3 and the relay 5 , and the temperature-sensitive hydrogel 8 is connected with the photoresistor 9 .

Using the constant temperature control box provided by the present invention, the transparency of the temperature-sensitive hydrogel 8 in the temperature-light intensity combined sensing device 4 changes with time, so that the material can realize the stepless change of energy in the case of changes in ambient temperature and sunlight. Adjust to meet actual needs more conveniently. Combine the temperature-sensitive hydrogel 8 with the photoresistor 9 and use it to control the heater. The phase change state of the hydrogel material determines whether the heater works or not. When the temperature is high, the gel becomes opaque, which can reduce the internal heat dissipation and achieve a constant temperature; when the temperature is high, the opaque hydrogel can block part of the external radiant heat on the one hand, and on the other hand, the water in it can absorb a large amount of heat. The convective heat and conduction heat reduce the impact of external heat on the system, and the cooling effect can be achieved without connecting a refrigerator, reducing unnecessary energy consumption, thereby achieving energy-saving effects.

Example 1

First prepare a temperature-sensitive hydrogel whose transparency changes with temperature, disperse 0g sodium chloride, 1g hydroxypropyl methylcellulose, 14.2g acrylamide monomer, and 0.03g N,N'-methylenebisacrylamide at room temperature Add 100g of deionized water that has been passed through nitrogen to remove oxygen, stir to obtain a uniform mixed solution, and then pass through nitrogen to remove the oxygen therein; then add 0.1g of potassium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally the reaction The liquid is injected into the mold and sealed, placed at 60°C for 8 hours, and polymerized to obtain a temperature-sensitive hydrogel; the tensile strength is 50kPa, and the elongation at break is 800%; the temperature-sensitive hydrogel is used to assemble a hydrogel box; The photoresistor is closely attached to the surface of the temperature-sensitive hydrogel facing away from the cold light source and combined with it to form a temperature-light intensity joint sensing device 4, and the temperature-light intensity joint sensing device 4 is connected to the heater 3 (125V AC) and the relay 5 (5V DC) connection to form a temperature control system. When the temperature in the constant temperature control box is lower than 20°C, the temperature-sensitive hydrogel is transparent, the resistance of the photoresistor is lower than 3kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; when the constant temperature control When the temperature in the box is higher than 24°C, the gel turns white and becomes opaque, the resistance of the photoresistor 9 is higher than 3kΩ, the relay 5 disconnects the load circuit, the heater 3 stops working, and the temperature in the constant temperature control box begins to drop; when the constant temperature When the temperature in the control box drops to 20°C, the temperature-sensitive hydrogel becomes transparent, the resistance value of the photoresistor 9 decreases, the heater 3 starts to work again, and the temperature in the constant temperature control box rises accordingly; The temperature inside the temperature is maintained within the range of 20°C to 24°C to achieve the effect of constant temperature; here, after the temperature inside the constant temperature control box rises, the opaque temperature-sensitive hydrogel box will block the heat radiation and reduce the heat inside the constant temperature box. External diffusion, thereby slowing down the temperature drop in the constant temperature control box, thus reducing the working time of the heater 3 and achieving the effect of energy saving.

Example 2

Disperse 10g of sodium chloride, 5g of hydroxypropyl methylcellulose, 21.3g of acrylamide monomer, and 0.75g of N,N'-methylenebisacrylamide into 100g of deionized In water, stir to obtain a uniform mixed solution, and then pass through nitrogen to remove the oxygen therein; then add 0.38g potassium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into a mold and seal it, and place it at 60 After reacting at ℃ for 24 hours, the temperature-sensitive color-changing hydrogel was polymerized; the tensile strength was 100 kPa, and the elongation at break was 600%. The temperature-sensitive hydrogel is used to assemble the hydrogel box; the photoresistor 9 is closely attached to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combined with it to form a temperature-light intensity combined sensing device. The heater 3 (220V alternating current) is connected with the relay 5 (5V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 22°C, the temperature-sensitive hydrogel is transparent, the resistance of the photoresistor is lower than 20kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; when the temperature in the constant temperature control box When the temperature is higher than 25°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photoresistor 9 is higher than 20kΩ, the relay 5 disconnects the load circuit, the heater 3 stops working, and the temperature in the constant temperature control box drops; When the temperature in the constant temperature control box drops to 22°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 decreases, the heater 3 restarts to work, and the temperature in the constant temperature control box rises accordingly; in this reciprocating cycle, Keep the temperature in the constant temperature control box within the range of 22°C to 25°C to achieve a constant temperature effect; here, after the temperature inside the constant temperature control box rises, the opaque temperature-sensitive hydrogel box will block heat radiation and reduce The internal heat of the constant temperature control box diffuses outward, thereby slowing down the temperature drop in the constant temperature control box, thereby reducing the working time of the heater 3 and achieving the effect of energy saving.

Example 3

Disperse 10g of sodium chloride, 5g of hydroxypropyl methylcellulose, 35.5g of acrylamide monomer, and 0.75g of N,N'-methylenebisacrylamide into 100g of deionized In water, stir to obtain a uniform mixed solution, and then pass through nitrogen to remove the oxygen therein; then add 0.25g potassium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into a mold and seal it, and place it at 60 After reacting at ℃ for 12 hours, the temperature-sensitive color-changing hydrogel was obtained by polymerization; its tensile strength was 150 kPa, and its elongation at break was 500%. The temperature-sensitive hydrogel is used to assemble the hydrogel box; the photoresistor 9 is closely attached to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combined with it to form a temperature-light intensity combined sensing device. The heater 3 (250V alternating current) is connected with the relay 5 (5V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 23°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 is lower than 30kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 27°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photoresistor 9 is higher than 30kΩ, the relay 5 disconnects the load circuit, the heater 3 stops working, and the constant temperature control The temperature in the box drops; when the temperature in the constant temperature control box drops to 23°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance value of the photosensitive resistor 9 decreases, the heater 3 starts working again, and the temperature in the constant temperature control box rises accordingly ; Such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 23°C to 27°C to achieve a constant temperature effect; here, after the temperature in the constant temperature control box rises, the opaque temperature-sensitive hydrogel box will Blocking heat radiation, reducing the outward diffusion of heat inside the constant temperature control box, thereby slowing down the temperature drop in the constant temperature control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 4

At room temperature, disperse 10g sodium chloride, 5g hydroxypropyl methylcellulose, 35.5g acrylamide monomer, 0.9g N,N'-methylenebisacrylamide into 100g deionized In water, stir to obtain a uniform mixed solution, and then pass through nitrogen to remove the oxygen therein; then add 0.3g of potassium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into a mold and seal it, and place it at 60 After reacting at ℃ for 24 hours, the temperature-sensitive color-changing hydrogel was obtained by polymerization; its tensile strength was 300 kPa, and its elongation at break was 300%. The temperature-sensitive hydrogel is used to assemble the hydrogel box; the photoresistor 9 is closely attached to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combined with it to form a temperature-light intensity combined sensing device. The heater 3 (220V alternating current) is connected with the relay 5 (5V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 30°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor is lower than 100kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 35°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photoresistor 9 is higher than 100kΩ, the relay 5 disconnects the load circuit, the heater 3 stops working, and the constant temperature control box The internal temperature drops; when the temperature in the constant temperature control box drops to 30°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance value of the photosensitive resistor 9 decreases, the heater 3 starts working again, and the temperature in the constant temperature control box rises accordingly; Such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 30°C to 35°C to achieve a constant temperature effect; here, after the temperature inside the constant temperature control box rises, the opaque thermosensitive hydrogel will block heat radiation , to reduce the outward diffusion of heat inside the constant temperature system, thereby slowing down the temperature drop in the constant temperature control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 5

Disperse 10g of sodium chloride, 5g of hydroxypropyl methylcellulose, 35.5g of acrylamide monomer, and 0.09g of N,N'-methylene bisacrylamide in turn at room temperature into 100g of deionized In water, stir to obtain a uniform mixed solution, and then pass nitrogen to remove the oxygen therein; then add 0.75g of potassium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into a mold and seal it, and place it at 60 After reacting at ℃ for 24 hours, the temperature-sensitive color-changing hydrogel was polymerized; the tensile strength was 220kPa, and the elongation at break was 400%. Assemble the temperature-sensitive hydrogel into a hydrogel box; attach the photoresistor 9 to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combine it with it to form a combined temperature-light intensity sensing device. The heater 3 (220V alternating current) is connected with the relay 5 (10V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 23°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 is lower than 50kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 27°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photosensitive resistor 9 is higher than 50kΩ, the relay 5 disconnects the load circuit, the heater 3 stops working, and the constant temperature control The temperature inside the box drops; when the temperature inside the constant temperature control box drops to 23°C, the temperature-sensitive temperature-sensitive hydrogel 8 becomes transparent, the resistance of the photoresistor 9 decreases, the heater 3 starts working again, and the temperature inside the constant temperature control box rises accordingly ; Such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 23°C to 27°C to achieve a constant temperature effect; here, after the temperature in the constant temperature control box rises, the opaque temperature-sensitive hydrogel box will Blocking heat radiation, reducing the outward diffusion of heat inside the constant temperature control box, thereby slowing down the temperature drop in the constant temperature control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 6

At room temperature, disperse 10g sodium chloride, 5g hydroxypropyl methylcellulose, 35.5g acrylamide monomer, 0.38g N,N'-methylenebisacrylamide into 100g deionized In water, stir to obtain a uniform mixed solution, and then pass through nitrogen to remove the oxygen therein; then add 0.38g potassium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into a mold and seal it, and place it at 60 After reacting at ℃ for 12 hours, the temperature-sensitive color-changing hydrogel was obtained by polymerization; its tensile strength was 250 kPa, and its elongation at break was 350%. The temperature-sensitive hydrogel is used to assemble the hydrogel box; the photoresistor 9 is closely attached to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combined with it to form a temperature-light intensity combined sensing device. The heater 3 (220V alternating current) is connected with the relay 5 (12V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 27°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 is lower than 70kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 30°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photoresistor 9 is higher than 70kΩ, the relay 5 disconnects the load circuit, the heater 3 stops working, and the constant temperature control The temperature in the box drops; when the temperature in the constant temperature control box drops to 27°C, the temperature-sensitive temperature-sensitive hydrogel 8 becomes transparent, the resistance of the photoresistor 9 decreases, the heater 3 starts working again, and the temperature in the constant temperature control box rises accordingly. High; such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 27°C to 30°C to achieve a constant temperature effect; here, after the temperature in the constant temperature control box rises, the opaque temperature-sensitive hydrogel box It will block the heat radiation and reduce the outward diffusion of heat inside the constant temperature control box, thereby slowing down the temperature drop in the constant temperature control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 7

At room temperature, disperse 10g sodium chloride, 5g hydroxypropyl methylcellulose, 35.5g acrylamide monomer, 0.38g N,N'-methylenebisacrylamide into 100g deionized In water, stir to obtain a uniform mixed solution, and then pass through nitrogen to remove the oxygen therein; then add 0.38g potassium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into a mold and seal it, and place it at 70 After reacting at ℃ for 12 hours, the temperature-sensitive color-changing hydrogel was polymerized; the tensile strength was 200 kPa, and the elongation at break was 450%. The temperature-sensitive hydrogel is used to assemble the hydrogel box; the photoresistor 9 is closely attached to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combined with it to form a temperature-light intensity combined sensing device. The heater 3 (220V alternating current) is connected with the relay 5 (12V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 24°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 is lower than 40kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 28°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photoresistor 9 is higher than 40kΩ, the relay 5 disconnects the load circuit, the heater 3 stops working, and the constant temperature control The temperature in the box drops; when the temperature in the constant temperature control box drops to 24°C, the temperature-sensitive temperature-sensitive hydrogel 8 becomes transparent, the resistance of the photoresistor 9 decreases, the heater 3 starts working again, and the temperature in the constant temperature control box rises accordingly. High; such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 24°C to 28°C to achieve the effect of constant temperature; here, after the temperature in the constant temperature control box rises, the opaque temperature-sensitive hydrogel will block Heat radiation can reduce the outward diffusion of heat inside the constant temperature control box, thereby slowing down the temperature drop in the constant temperature control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 8

At room temperature, disperse 10g sodium chloride, 5g hydroxypropyl methylcellulose, 35.5g acrylamide monomer, 0.45g N,N'-methylenebisacrylamide into 100g deionized In water, stir to obtain a uniform mixed solution, and then pass through nitrogen to remove the oxygen therein; then add 0.45g of potassium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into a mold and seal it, and place it at 70 After reacting at ℃ for 12 hours, the temperature-sensitive color-changing hydrogel was obtained by polymerization; the tensile strength thereof was 350 kPa, and the elongation at break was 250%. Assemble the temperature-sensitive hydrogel into a hydrogel box; attach the photoresistor 9 to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combine it with it to form a combined temperature-light intensity sensing device. The heater 3 (220V alternating current) is connected with the relay 5 (12V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 36°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 is lower than 120kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 40°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque. The temperature in the box drops; when the temperature in the constant temperature control box drops to 36°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 decreases, the heater 3 starts working again, and the temperature in the constant temperature control box rises accordingly ; Such a reciprocating cycle keeps the temperature in the thermostatic control box within the range of 36°C to 40°C to achieve a constant temperature effect; here, after the temperature in the constant temperature control box rises, the opaque temperature-sensitive hydrogel box will Blocking heat radiation, reducing the outward diffusion of heat inside the constant temperature control box, thereby slowing down the temperature drop in the constant temperature control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 9

At room temperature, disperse 35g sodium chloride, 1g hydroxypropyl methylcellulose, 35.5g acrylamide monomer, 0.38g N,N'-methylenebisacrylamide into 100g deionized In water, stir to obtain a uniform mixed solution, and then pass through nitrogen to remove the oxygen therein; then add 0.3g of potassium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into a mold and seal it, and place it at 80 After reacting at ℃ for 12 hours, the temperature-sensitive color-changing hydrogel was obtained by polymerization; its tensile strength was 310 kPa, and its elongation at break was 300%. The temperature-sensitive hydrogel is used to assemble the hydrogel box; the photoresistor 9 is closely attached to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combined with it to form a temperature-light intensity combined sensing device. The heater 3 (220V alternating current) is connected with the relay 5 (12V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 33°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 is lower than 110kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 37°C, the gel turns white and becomes opaque, the resistance of the photoresistor is higher than 110kΩ, the relay disconnects the load circuit, the heater stops working, and the temperature in the constant temperature control box drops; when the constant temperature control When the temperature in the box drops to 33°C, the temperature-sensitive hydrogel becomes transparent, the resistance of the photoresistor decreases, the heater restarts to work, and the temperature in the constant temperature control box rises accordingly; such a reciprocating cycle keeps the temperature in the constant temperature control box maintained In the range of 33°C to 37°C, the effect of constant temperature is achieved; here, after the temperature inside the constant temperature control box rises, the opaque temperature-sensitive hydrogel will block the heat radiation and reduce the heat inside the constant temperature control box. The temperature drop in the constant temperature control box is slowed down, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 10

Disperse 35g of sodium chloride, 10g of hydroxypropyl methylcellulose, 35.5g of acrylamide monomer, and 0.38g of N,N'-methylenebisacrylamide into 100g of deionized In water, stir to obtain a uniform mixed solution, and then pass through nitrogen to remove the oxygen therein; then add 0.4g of potassium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into a mold and seal it, and place it at 60 After reacting at ℃ for 12 hours, the temperature-sensitive color-changing hydrogel was polymerized; the tensile strength thereof was 250 kPa, and the elongation at break was 400%. Assemble the temperature-sensitive hydrogel into a hydrogel box; attach the photoresistor 9 to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combine it with it to form a combined temperature-light intensity sensing device. The heater 3 (220V alternating current) is connected with the relay 5 (12V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 27°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 is lower than 70kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 30°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photoresistor is higher than 70kΩ, the relay disconnects the load circuit, the heater stops working, and the temperature in the constant temperature control box decrease; when the temperature in the constant temperature control box drops to 27°C, the temperature-sensitive hydrogel becomes transparent, the resistance of the photoresistor decreases, the heater starts to work again, and the temperature in the constant temperature control box rises accordingly; such a reciprocating cycle makes the constant temperature control box Internal temperature The internal temperature is maintained within the range of 27°C to 30°C to achieve a constant temperature effect; here, after the internal temperature in the constant temperature control box rises, the opaque temperature-sensitive hydrogel will block heat radiation and reduce the internal heat of the constant temperature system to the outside Diffusion, thereby slowing down the temperature drop in the constant temperature control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 11

Disperse 10g of lithium chloride, 5g of hydroxypropyl methylcellulose, 19.8g of N,N-dimethylacrylamide monomer, and 0.38g of N,N'-methylene bisacrylamide in turn at room temperature into 100g of Stir in deionized water deoxygenated with nitrogen gas to obtain a uniform mixed solution, then pass through nitrogen to remove the oxygen in it; then add 0.34g of ammonium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into the mold neutralized and sealed, and reacted at 60° C. for 12 hours, and polymerized to obtain a temperature-sensitive color-changing hydrogel; its tensile strength was 60 kPa, and its elongation at break was 780%. The temperature-sensitive hydrogel is used to assemble the hydrogel box; the photoresistor 9 is closely attached to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combined with it to form a temperature-light intensity combined sensing device. The heater 3 (28V direct current) is connected with the relay 5 (5V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 20°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 is lower than 10kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 24°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photosensitive resistor 9 is higher than 10kΩ, the relay 5 disconnects the load circuit, the heater 3 stops working, and the constant temperature control The temperature in the box drops; when the temperature in the constant temperature control box drops to 20°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 decreases, the heater 3 starts working again, and the temperature in the constant temperature control box rises accordingly ; Such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 20°C to 24°C to achieve the effect of constant temperature; here, after the temperature in the constant temperature control box rises, the opaque thermosensitive hydrogel will block heat. Radiation reduces the heat inside the thermostatic control box to spread outward, thereby slowing down the temperature drop in the thermostatic control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 12

Disperse 10g of lithium chloride, 5g of hydroxypropyl methylcellulose, 29.7g of acrylamide monomer, and 0.38g of N,N'-methylenebisacrylamide in turn at room temperature into 100g of deionized In water, stir to obtain a uniform mixed solution, and then pass through nitrogen to remove the oxygen therein; then add 0.34g ammonium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into a mold and seal it, and place it at 70 After reacting at ℃ for 12 hours, the temperature-sensitive color-changing hydrogel was obtained by polymerization; its tensile strength was 150 kPa, and its elongation at break was 500%. The temperature-sensitive hydrogel is used to assemble the hydrogel box; the photoresistor 9 is closely attached to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combined with it to form a temperature-light intensity combined sensing device. The heater 3 (30V direct current) is connected with the relay 5 (5V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 23°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 is lower than 30kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 27°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photoresistor 9 is higher than 30kΩ, the relay 5 disconnects the load circuit, the heater 3 stops working, and the constant temperature control The temperature inside the box drops; when the temperature inside the constant temperature control box drops to 23°C, the temperature-sensitive temperature-sensitive hydrogel 8 becomes transparent, the resistance of the photoresistor 9 decreases, the heater 3 starts working again, and the temperature inside the constant temperature control box rises accordingly ; Such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 23°C to 27°C to achieve the effect of constant temperature; here, after the temperature in the constant temperature control box rises, the opaque thermosensitive hydrogel will block heat. Radiation reduces the heat inside the thermostatic control box to spread outward, thereby slowing down the temperature drop in the thermostatic control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 13

At room temperature, disperse 20g lithium chloride, 5g hydroxypropyl methylcellulose, 49.6g N,N-dimethylacrylamide monomer, 0.38g N,N'-methylenebisacrylamide into 100g of Stir in deionized water deoxygenated with nitrogen gas to obtain a uniform mixed solution, then pass through nitrogen to remove the oxygen in it; then add 0.34g of ammonium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into the mold neutralized and sealed, and reacted at 70° C. for 12 hours, and polymerized to obtain a temperature-sensitive color-changing hydrogel; its tensile strength was 230 kPa, and its elongation at break was 480%. Assemble the temperature-sensitive hydrogel into a hydrogel box; attach the photoresistor 9 to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combine it with it to form a combined temperature-light intensity sensing device. The heater 3 (29V direct current) is connected with the relay 5 (5V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 25°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 is lower than 60kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 29°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photoresistor 9 is higher than 60kΩ, the relay 5 disconnects the load circuit, the heater stops working, and the constant temperature control box The internal temperature drops; when the temperature in the constant temperature control box drops to 25°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photosensitive resistor 9 decreases, the heater 3 starts working again, and the temperature in the constant temperature control box rises accordingly; Such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 25°C to 29°C to achieve a constant temperature effect; here, after the temperature inside the constant temperature control box rises, the opaque thermosensitive hydrogel will block heat radiation , reduce the outward diffusion of heat inside the constant temperature control box, thereby slowing down the temperature drop in the constant temperature control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 14

Disperse 20g of lithium chloride, 5g of hydroxypropylmethylcellulose, 63.6g of N,N-diethylacrylamide monomer, and 0.38g of N,N'-methylenebisacrylamide into 100g of Stir in deionized water deoxygenated with nitrogen gas to obtain a uniform mixed solution, then pass through nitrogen to remove the oxygen in it; then add 0.34g of ammonium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into the mold neutralized and sealed, placed at 80° C. for 12 hours, and polymerized to obtain a temperature-sensitive color-changing hydrogel; its tensile strength was 260 kPa, and its elongation at break was 420%. The temperature-sensitive hydrogel is used to assemble the hydrogel box; the photoresistor 9 is closely attached to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combined with it to form a temperature-light intensity combined sensing device. The heater 3 (28V direct current) is connected with the relay 5 (5V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 28°C, the temperature-sensitive temperature-sensitive hydrogel 8 becomes transparent, the resistance of the photoresistor 9 is lower than 80kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises ;When the temperature in the constant temperature control box is higher than 32°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photoresistor is higher than 80kΩ, the relay disconnects the load circuit, the heater stops working, and the constant temperature control The temperature inside the box drops; when the temperature inside the constant temperature control box drops to 28°C, the temperature-sensitive temperature-sensitive hydrogel 8 becomes transparent, the resistance of the photoresistor 9 decreases, the heater 3 starts working again, and the temperature inside the constant temperature control box rises accordingly. High; such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 28°C to 32°C to achieve the effect of constant temperature; here, after the temperature in the constant temperature control box rises, the opaque temperature-sensitive hydrogel will block Heat radiation can reduce the outward diffusion of heat inside the constant temperature control box, thereby slowing down the temperature drop in the constant temperature control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 15

At room temperature, disperse 30g lithium chloride, 10g hydroxypropyl methylcellulose, 63.6g N,N-diethylacrylamide monomer, and 0.38g N,N'-methylenebisacrylamide into 100g of Stir in deionized water deoxygenated with nitrogen gas to obtain a uniform mixed solution, then pass through nitrogen to remove the oxygen in it; then add 0.34g of ammonium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into the mold neutralized and sealed, and reacted at 80° C. for 24 hours to obtain a temperature-sensitive color-changing hydrogel; its tensile strength was 260 kPa, and its elongation at break was 430%. The temperature-sensitive hydrogel is used to assemble the hydrogel box; the photoresistor 9 is closely attached to the surface of the temperature-sensitive temperature-sensitive hydrogel 8 facing away from the cold light source 2 and combined with it to form a temperature-light intensity combined sensing device. The heater 3 (28V direct current) is connected with the relay 5 (5V direct current) to form a temperature control system. When the temperature in the constant temperature control box is lower than 28°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 is lower than 80kΩ, the relay 5 is connected to the load circuit, the heater 3 works, and the temperature in the constant temperature control box rises; When the temperature in the constant temperature control box is higher than 32°C, the temperature-sensitive temperature-sensitive hydrogel 8 turns white and becomes opaque, the resistance of the photosensitive resistor 9 is higher than 80kΩ, the relay 5 disconnects the load circuit, the heater 3 stops working, and the constant temperature control The temperature in the box drops; when the temperature in the constant temperature control box drops to 28°C, the temperature-sensitive temperature-sensitive hydrogel 8 is transparent, the resistance of the photoresistor 9 decreases, the heater 3 starts working again, and the temperature in the constant temperature control box rises accordingly ; Such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 28°C to 32°C to achieve the effect of constant temperature; here, after the temperature in the constant temperature control box rises, the opaque thermosensitive hydrogel will block heat. Radiation reduces the heat inside the thermostatic control box to spread outward, thereby slowing down the temperature drop in the thermostatic control box, thus reducing the working time of the heater and achieving the effect of energy saving.

Example 16

At room temperature, disperse 30g lithium chloride, 10g hydroxypropyl methylcellulose, 63.6g N,N-diethylacrylamide monomer, 0.9g N,N'-methylenebisacrylamide into 100g Stir in deionized water deoxygenated with nitrogen gas to obtain a uniform mixed solution, then pass through nitrogen to remove the oxygen in it; then add 0.4g ammonium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into the mold neutralized and sealed, and reacted at 80° C. for 24 hours, and polymerized to obtain a temperature-sensitive color-changing hydrogel; its tensile strength was 500 kPa, and its elongation at break was 200%. Assemble the temperature-sensitive hydrogel into a hydrogel box; attach the photoresistor to the surface of the temperature-sensitive hydrogel facing away from the cold light source and combine it with it to form a temperature-light intensity combined sensing device, and connect the device with a heater (28V DC) Connect with a relay (5V DC) to form a temperature control system. When the temperature in the constant temperature control box is lower than 40°C, the temperature-sensitive hydrogel is transparent, the resistance of the photoresistor is lower than 150kΩ, the relay is connected to the load circuit, the heater works, and the temperature in the constant temperature control box rises; when the temperature in the constant temperature control box is high At 44°C, the gel turns white and becomes opaque, the resistance of the photoresistor is higher than 150kΩ, the relay disconnects the load circuit, the heater stops working, and the temperature in the constant temperature control box drops; when the temperature in the constant temperature control box drops to 40°C At this time, the temperature-sensitive hydrogel becomes transparent, the resistance of the photoresistor decreases, the heater restarts to work, and the temperature in the constant temperature control box rises accordingly; such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 40°C to 44°C Inside, to achieve the effect of constant temperature; here, after the temperature inside the constant temperature control box rises, the opaque temperature-sensitive hydrogel will block the heat radiation, reduce the internal heat diffusion of the constant temperature system, so that the temperature inside the constant temperature control box will slow down, Therefore, the working time of the heater is reduced, and the effect of energy saving is achieved.

Example 17

Disperse 10g of potassium chloride, 5g of hydroxypropylmethylcellulose, 50.9g of N,N-diethylacrylamide monomer, and 0.3g of N,N'-methylene bisacrylamide at room temperature into 100g of Stir in deionized water deoxygenated by argon to obtain a uniform mixed solution, and then pass through argon to remove the oxygen in it; then add 0.46g of ammonium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into Put it into a mold and seal it, place it at 70° C. for 8 hours, and polymerize to obtain a temperature-sensitive color-changing hydrogel; its tensile strength is 230 kPa, and its elongation at break is 500%. Assemble the temperature-sensitive hydrogel into a hydrogel box; attach the photoresistor to the surface of the temperature-sensitive hydrogel facing away from the cold light source and combine it with it to form a temperature-light intensity combined sensing device, and connect the device with a heater (220V AC) Connect with a relay (12V DC) to form a temperature control system. When the temperature in the constant temperature control box is lower than 25°C, the temperature-sensitive hydrogel is transparent, the resistance of the photoresistor is lower than 60kΩ, the relay is connected to the load circuit, the heater works, and the temperature in the constant temperature control box rises; when the temperature in the constant temperature control box is high At 29°C, the gel turns white and becomes opaque, the resistance of the photoresistor is higher than 60kΩ, the relay disconnects the load circuit, the heater stops working, and the temperature in the constant temperature control box drops; when the temperature in the constant temperature control box drops to 25°C At this time, the temperature-sensitive hydrogel becomes transparent, the resistance of the photoresistor decreases, the heater starts to work again, and the temperature in the constant temperature control box rises accordingly; such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 25°C to 29°C Inside, to achieve the effect of constant temperature; here, after the temperature inside the constant temperature control box rises, the opaque temperature-sensitive hydrogel will block the heat radiation, reduce the internal heat diffusion of the constant temperature system, so that the temperature inside the constant temperature control box will slow down, Therefore, the working time of the heater is reduced, and the effect of energy saving is achieved.

Example 18

Disperse 10g of potassium chloride, 10g of hydroxypropyl methylcellulose, 50.9g of N,N-diethylacrylamide monomer, and 0.3g of N,N'-methylenebisacrylamide in turn at room temperature into 100g of Stir in deionized water deoxygenated by argon to obtain a uniform mixed solution, and then pass through argon to remove the oxygen in it; then add 0.46g of ammonium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into Put it into a mold and seal it, place it at 70° C. for 8 hours, and polymerize to obtain a temperature-sensitive color-changing hydrogel; its tensile strength is 230 kPa, and its elongation at break is 510%. Assemble the temperature-sensitive hydrogel into a hydrogel box; attach the photoresistor to the surface of the temperature-sensitive hydrogel facing away from the cold light source and combine it with it to form a temperature-light intensity combined sensing device, and connect the device with a heater (220V AC) Connect with a relay (12V DC) to form a temperature control system. When the temperature in the constant temperature control box is lower than 25°C, the temperature-sensitive hydrogel is transparent, the resistance of the photoresistor is lower than 60kΩ, the relay is connected to the load circuit, the heater works, and the temperature in the constant temperature control box rises; when the temperature in the constant temperature control box is high At 29°C, the gel turns white and becomes opaque, the resistance of the photoresistor is higher than 60kΩ, the relay disconnects the load circuit, the heater stops working, and the temperature in the constant temperature control box drops; when the temperature in the constant temperature control box drops to 25°C At this time, the temperature-sensitive hydrogel becomes transparent, the resistance of the photoresistor decreases, the heater starts to work again, and the temperature in the constant temperature control box rises accordingly; such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 25°C to 29°C Inside, to achieve the effect of constant temperature; here, after the temperature inside the constant temperature control box rises, the opaque temperature-sensitive hydrogel will block the heat radiation, reduce the internal heat diffusion of the constant temperature system, so that the temperature inside the constant temperature control box will slow down, Therefore, the working time of the heater is reduced, and the effect of energy saving is achieved.

Example 19

Disperse 20g of potassium chloride, 10g of hydroxypropyl methylcellulose, 50.9g of N,N-diethylacrylamide monomer, and 0.3g of N,N'-methylenebisacrylamide at room temperature into 100g of In the deionized water deoxygenated by argon, stir to obtain a uniform mixed solution, and then pass through argon to remove the oxygen therein; then add 0.46g ammonium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into Put it in a mold and seal it, place it at 70° C. for 8 hours, and polymerize to obtain a temperature-sensitive color-changing hydrogel; its tensile strength is 230 kPa, and its elongation at break is 500%. The temperature-sensitive color-changing hydrogel is pasted on the outer wall of the box to form a hydrogel box 1; the photoresistor 9 is embedded in the inside of the temperature-sensitive hydrogel 8, and the outside of the temperature-sensitive hydrogel 8 faces the cold light source 2, forming a temperature-light Strong joint induction device, connect the device with heater (220V AC) and relay (12V DC) to form a temperature control system. When the temperature in the constant temperature control box is lower than 25°C, the temperature-sensitive hydrogel is transparent, the resistance of the photoresistor is lower than 80kΩ, the relay is connected to the load circuit, the heater works, and the temperature in the constant temperature control box rises; when the temperature in the constant temperature control box is high At 28°C, the gel turns white and becomes opaque, the resistance of the photoresistor is higher than 80kΩ, the relay disconnects the load circuit, the heater stops working, and the temperature in the constant temperature control box drops; when the temperature in the constant temperature control box drops to 32°C At this time, the temperature-sensitive hydrogel becomes transparent, the resistance of the photoresistor decreases, the heater restarts to work, and the temperature in the constant temperature control box rises accordingly; such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 28°C to 32°C Inside, to achieve the effect of constant temperature; here, after the temperature inside the constant temperature control box rises, the opaque temperature-sensitive hydrogel will block the heat radiation, reduce the internal heat diffusion of the constant temperature system, so that the temperature inside the constant temperature control box will slow down, Therefore, the working time of the heater is reduced, and the effect of energy saving is achieved.

Example 20

At room temperature, 30g of potassium chloride, 10g of hydroxypropyl methylcellulose, 50.9g of N,N-diethylacrylamide monomer, and 0.3g of N,N'-methylenebisacrylamide were sequentially dispersed into 100g of In the deionized water deoxygenated by argon, stir to obtain a uniform mixed solution, and then pass through argon to remove the oxygen therein; then add 0.46g ammonium persulfate and stir evenly to obtain a hydrogel reaction solution, and finally inject the reaction solution into Put it in a mold and seal it, place it at 70° C. for 8 hours, and polymerize to obtain a temperature-sensitive color-changing hydrogel; its tensile strength is 230 kPa, and its elongation at break is 500%. The temperature-sensitive color-changing hydrogel is pasted on the inner wall of the box to form a hydrogel box 1; the photoresistor is attached to the surface of the temperature-sensitive hydrogel facing away from the cold light source and combined with it to form a temperature-light intensity combined sensing device. The device is connected with a heater (220V AC) and a relay (12V DC) to form a temperature control system. When the temperature in the constant temperature control box is lower than 30°C, the temperature-sensitive hydrogel is transparent, the resistance of the photoresistor is lower than 100kΩ, the relay is connected to the load circuit, the heater works, and the temperature in the constant temperature control box rises; when the temperature in the constant temperature control box is high At 35°C, the gel turns white and becomes opaque, the resistance of the photoresistor is higher than 100kΩ, the relay disconnects the load circuit, the heater stops working, and the temperature in the constant temperature control box drops; when the temperature in the constant temperature control box drops to 30°C At this time, the temperature-sensitive hydrogel becomes transparent, the resistance of the photoresistor decreases, the heater restarts to work, and the temperature in the constant temperature control box rises accordingly; such a reciprocating cycle keeps the temperature in the constant temperature control box within the range of 30°C to 35°C Inside, to achieve the effect of constant temperature; here, after the temperature inside the constant temperature control box rises, the opaque temperature-sensitive hydrogel will block the heat radiation, reduce the internal heat diffusion of the constant temperature system, so that the temperature inside the constant temperature control box will slow down, Therefore, the working time of the heater is reduced, and the effect of energy saving is achieved.

In summary, the embodiment of the present invention introduces hydroxypropyl methylcellulose with reversible temperature-sensitive phase transition properties, and obtains a temperature-sensitive hydrogel whose phase transition degree gradually deepens with temperature changes, thereby achieving Under changing conditions, the material can adjust energy steplessly to meet actual needs more conveniently. Furthermore, this hydrogel material is combined with a photoresistor and used to control the heater. The phase change state of the hydrogel material determines whether the heater works or not. When the ambient temperature is low to a certain value, the heater will Working, when the temperature rises, the gel becomes opaque, which can reduce the internal heat dissipation and achieve a constant temperature; when the temperature is high, the opaque hydrogel can block part of the external radiant heat on the one hand, and on the other hand, the Water can absorb a large amount of convective heat and conduction heat, reduce the impact of external heat on the system, achieve cooling effect without connecting a refrigerator, reduce unnecessary energy consumption, and achieve energy saving effects.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. an energy-saving type constant temperature control box is characterized in that, comprises hydrogel casing (1), is arranged on the cold light source (2) outside hydrogel casing (1) and is arranged on hydrogel casing ( 1) Internal temperature control system, The temperature control system includes a heater (3), a temperature-light intensity joint sensing device (4), a relay (5) and a power supply (6), and the temperature-light intensity joint sensing device (4) and the heater (3) and the relay ( 5) All wires are connected, and the power supply (6) is connected to the heater (3) and the relay (5) by all wires; Moreover, the temperature-light intensity joint sensing device (4) is arranged opposite to the cold light source (2), and the temperature-light intensity joint sensing device includes a temperature-sensitive hydrogel (8) and a photoresistor (9), and the temperature-sensitive hydrogel One side of the glue (8) is opposite to the cold light source (2), and the photoresistor (9) is arranged on the other side of the temperature-sensitive hydrogel (8); The hydrogel in the hydrogel box (1) and the hydrogel in the combined temperature-light intensity sensing device (4) are temperature-sensitive hydrogels whose transparency changes with temperature. 2. An energy-saving constant temperature control box according to claim 1, characterized in that the hydrogel box (1) is a box made of a temperature-sensitive hydrogel whose transparency changes with temperature. 3. A kind of energy-saving constant temperature control box according to claim 1, it is characterized in that, the inner wall or the outer wall of the box of the hydrogel box (1) is pasted with a temperature-sensitive hydrogel whose transparency changes with temperature, and the The inner wall may be all or part of the inner wall of the box, and the outer wall may be all or part of the outer wall of the box. 4. A kind of energy-saving constant temperature control box according to claim 1, characterized in that, the combination of hydrogel (8) and photoresistor (9) in the temperature-light intensity combined sensing device (4) It is an attachment type, that is, the photoresistor (9) is attached to the side of the hydrogel (8) facing away from the cold light source (2). 5. A kind of energy-saving constant temperature control box according to any one of claims 1-4, characterized in that, the hydrogel (8) and photoresistor (9) in the temperature-light intensity combined sensing device (4) ) is embedded, that is, the photoresistor (9) is embedded in the hydrogel (8). 6. A preparation method of the energy-saving constant temperature control box as claimed in any one of claims 1-5, characterized in that, comprising the steps of: (1) Preparation of temperature-sensitive hydrogel whose transparency changes with temperature: Add inorganic salt, hydroxypropyl methylcellulose, acrylamide monomer, and cross-linking agent to deionized water in sequence, stir evenly to obtain a mixed solution, and pass it into The inert gas removes the oxygen in the mixed solution, then adds the initiator and stirs evenly to obtain a hydrogel reaction solution, injects the reaction solution into a mold and seals it, and obtains a temperature-sensitive hydrogel whose transparency changes with temperature through a polymerization reaction; (2) Preparation of the hydrogel box: the hydrogel box (1) is produced by using the temperature-sensitive hydrogel whose transparency prepared in step (1) changes with temperature; or the transparency prepared in step (1) changes with temperature The changed temperature-sensitive hydrogel is attached to the inner or outer wall of the box to produce a hydrogel box (1); (3) Preparation of temperature-light intensity combined sensing device: attach the photoresistor (9) to one side of the temperature-sensitive hydrogel (8) whose transparency changes with temperature prepared by step (1), or embed it in the (1) inside the prepared temperature-sensitive hydrogel (8) whose transparency changes with temperature, and prepare the temperature-light intensity combined sensing device; (4) Preparation of the temperature control system: the temperature-light intensity combined sensing device obtained in step (3) is electrically connected to the relay (5), and the heater (3) is connected to the power supply (6) with the relay (5) Get up, control the on-off of the relay (5) through the temperature-light intensity combined sensor, and then control the on-off of the power supply (6) of the heater (3) through the relay (5); (5) Preparation of an energy-saving constant temperature control system: place the cold light source (2) outside the hydrogel box (1), and place the temperature control system inside the hydrogel box (1) , the setting position of the temperature-light intensity joint sensing device is opposite to the cold light source, so that the light emitted by the cold light source (2) passes through the hydrogel (8) in the temperature-light intensity joint sensing device ) is then irradiated onto the photoresistor (9). 7. The preparation method of a kind of energy-saving constant temperature control box according to claim 6, is characterized in that, the described inorganic salt of step (1) adopts lithium chloride, sodium chloride, potassium chloride, acrylamide monomer Any of acrylamide, N,N-dimethylacrylamide, and N,N-diethylacrylamide is used. 8. The preparation method of a kind of energy-saving constant temperature control box according to claim 6, characterized in that, the concentration of the inorganic salt in step (1) relative to the deionized water is 0～0.35g/mL, hydroxypropyl The concentration of methylcellulose relative to deionized water is 0.01-0.10g/mL, the concentration of acrylamide monomer relative to deionized water is 2-5mol/L, and the molar ratio of crosslinking agent to acrylamide monomer The molar ratio of the initiator to the acrylamide monomer is 0.2% to 0.5%, and the polymerization reaction is carried out at 60-80° C. for 8-24 hours. 9 . The method for preparing an energy-saving constant temperature control box according to claim 6 , characterized in that, in step (3), the resistance value of the photosensitive resistor ( 9 ) used as a switch ranges from 3 to 150 kΩ. 10. according to the preparation method of a kind of energy-saving constant temperature control box described in any one of claim 6-9, it is characterized in that, the relay operating voltage of the constant temperature control system in step (4) is 5～12V direct current, the heater operating voltage 125-250V AC or 28-30V DC.

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