Heating pad capable of accurately controlling temperature

Abstract

The utility model discloses a heating pad capable of accurately controlling temperature. The heating pad comprises a power line, the power line is electrically connected with a temperature control box, an IC and a temperature control and setting module are arranged in the temperature control box, the temperature control box is electrically connected with a heating sheet, the power line comprises two wire lug terminals and two tin wires, and the two wire lug terminals and the two tin wires are electrically connected to the temperature control box; according to the utility model, the far infrared heating carbon paste sheet covers the whole PVC insulating sheet, so that the temperature is more uniform during heating, the NTC thermistor arranged in the heating pad can detect the temperature of the heating pad in real time and transmit data to the IC in time, the temperature is accurately controlled by the IC, the temperature range can be randomly adjusted from 0 to 50 DEG C, accurate temperature control can be realized, and the service life of the heating pad is prolonged. Therefore, different working temperatures can be set according to different use scenes, insufficient temperature or overhigh temperature is avoided, potential safety hazards are eliminated, a warm and comfortable rest environment is provided for pets, and an appropriate growth space is provided for growth of flowers and plants.

Description

Technical Field

[0001] The utility model relates to the technical field of heating pads, in particular to a heating pad with precise temperature control. Background Art

[0002] As people's living standards improve, most families like to plant flowers and plants and raise pets to add fun in their spare time. In the cold winter, in order to promote the germination and growth of flowers and plants and prevent pets from freezing, it is usually necessary to use heating pads to heat the germination and keep warm.

[0003] In the prior art, the heating pads currently on the market are basically of two types: direct plug-in type and knob-type stepless temperature control. The former cannot control the temperature at all, and the latter cannot accurately control the temperature. If the temperature is too low, it will not work, and if it is too high, it will easily scald the heated object. Therefore, a heating pad with precise temperature control is needed to meet people's needs. Utility Model Content

[0004] The purpose of the utility model is to provide a heating pad with precise temperature control to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heating pad with precise temperature control, comprising a power cord; the electric wires on the power cord are connected to a temperature control box, the temperature control box is provided with an IC and a temperature control and setting module, the temperature control box is electrically connected to a heating sheet, the power cord comprises two wire ear terminals and two tin wires, the two wire ear terminals and the two tin wires are electrically connected to the temperature control box, the two tin wires are electrically connected to the same NTC thermistor, the heating sheet comprises a PET transparent film, the PET transparent film is printed with a silver conductive circuit, the two wire ear terminals are electrically connected to the PET transparent film, one side of the PET transparent film is connected to a far-infrared heating carbon paste sheet, the far-infrared heating carbon paste sheet covers the silver conductive circuit, one side of the far-infrared heating carbon paste sheet is connected to a PET insulating film, the PET insulating film and one side of the PET transparent film are both pasted with self-adhesive tape, PVC insulating sheets are pasted with two self-adhesive tapes, the NTC thermistor is located between the PET insulating film and the PET transparent film, and high-frequency pressing and sealing is adopted between the two PVC insulating sheets.

[0006] Preferably, a heat shrink tubing is movably sleeved on the wire ear terminal, and a double-wall heat shrink tubing is movably sleeved on the tin wire.

[0007] Preferably, electrical tape is adhered to the connection between the wire ear terminal, the tin wire and the temperature control box, and the NTC thermistor is adhered and installed on one side of the PET transparent film using aluminum foil tape.

[0008] Preferably, EVA foam is pasted on the NTC thermistor, a mounting hole is opened on the EVA foam, and the EVA foam is located on one side of the PET transparent film.

[0009] Preferably, the thickness of the PET transparent film is 0.1 mm, the thickness of the PET insulating film is 0.075 mm, and the thickness of the PVC insulating sheet is 0.57 mm.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] (1) The utility model covers the entire PVC insulating sheet with a far-infrared heating carbon paste sheet, so that the temperature is more uniform during heating. The heating pad has a built-in NTC thermistor that can detect the temperature of the heating pad in real time and transmit the data to the IC in time. The IC accurately controls the temperature. The temperature range can be adjusted from 0 to 50 degrees. Accurate temperature control can be achieved so that different working temperatures can be set according to different usage scenarios to avoid insufficient or excessive temperature, eliminate safety hazards, provide pets with a warm and comfortable resting environment, and provide a suitable growth space for flowers and plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of a heating pad with precise temperature control proposed by the utility model;

[0013] Figure 2 This is a schematic diagram of the explosion structure of the far-infrared heating carbon paste sheet of the heating pad with precise temperature control proposed by the utility model;

[0014] Figure 3 This is a schematic diagram of the EVA foam structure of a heating pad with precise temperature control proposed by the utility model;

[0015] Figure 4 This is a schematic diagram of the structure inside the power cord of a heating pad with precise temperature control proposed by the utility model;

[0016] Figure 5 This is a schematic diagram of the working principle of the temperature control and setting module of a heating pad with precise temperature control proposed by the utility model.

[0017] In the figure: 1. Power cord; 11. Wire ear terminal; 12. Heat shrink tubing; 13. Tin wire; 14. NTC thermistor; 15. Double-wall heat shrink tubing; 16. EVA foam; 17. Mounting hole; 2. Temperature control box; 3. Heating sheet; 31. Far-infrared heating carbon paste sheet; 32. PET insulating film; 33. PET transparent film; 34. Self-adhesive sticker; 35. PVC insulating sheet. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-5 The utility model provides a technical solution: a heating pad with precise temperature control, including a power cord 1; the power cord 1 is connected with a temperature control box 2, the temperature control box 2 is provided with an IC and a temperature control and setting module, the temperature control box 2 is electrically connected with a heating sheet 3, the power cord 1 includes two wire ear terminals 11 and two tin wires 13, the two wire ear terminals 11 and the two tin wires 13 are electrically connected to the temperature control box 2, the two tin wires 13 are electrically connected with the same NTC thermistor 14, the heating sheet 3 includes a PET transparent film 33, the PET transparent film 33 is printed with a silver conductive circuit, the two wire ear terminals 11 are electrically The far-infrared heating carbon paste sheet 31 is connected to the PET transparent film 33 on one side of the PET transparent film 33, and the far-infrared heating carbon paste sheet 31 covers the silver conductive circuit. The far-infrared heating carbon paste sheet 31 is connected to the PET insulating film 32 on one side of the PET insulating film 32 and the PET transparent film 33. Self-adhesive stickers 34 are pasted and installed on one side of the PET insulating film 32 and the PET transparent film 33. PVC insulating sheets 35 are pasted and installed on the two self-adhesive stickers 34. The NTC thermistor 14 is located between the PET insulating film 32 and the PET transparent film 33. High-frequency pressing is used to seal the two PVC insulating sheets 35. Connect the power cord 1 to the AC After 120V 60HZ power supply, press the switch of the temperature control and setting module on the heating box 2 to set the temperature. After the temperature setting is completed, the far-infrared heating carbon paste sheet 31 heats up. When the working temperature reaches the set value, it is fed back to the temperature control and setting module through the NTC thermistor 14 to turn off the heating. When the temperature is lower than the set value, the NTC thermistor 14 feeds back to the temperature control and setting module to turn on the heating. In this way, the far-infrared heating carbon paste sheet 31 covers the entire PVC insulating sheet 35, which makes the temperature evenly transferred to the PVC insulating sheet 35. By building the NTC thermistor 14 into the heating sheet 3, the temperature of the mat can be detected in real time, and the data can be transmitted to the IC in time. The temperature is accurately controlled by the IC, and the temperature range can be adjusted at will from 0 to 50 degrees to avoid insufficient temperature or excessive temperature.

[0020] Furthermore, a heat shrinkable sleeve 12 is movably sleeved on the wire ear terminal 11, and a double-wall heat shrinkable sleeve 15 is movably sleeved on the tin wire 13. The heat shrinkable sleeve 12 and the double-wall heat shrinkable sleeve 15 are used to protect the wire ear terminal 11 and the tin wire 13 respectively.

[0021] Furthermore, electrical tape is affixed to the connection between the wire ear terminal 11, the tin wire 13 and the temperature control box 2, and the NTC thermistor 14 is affixed and installed on one side of the PET transparent film 33 using aluminum foil tape. The NTC thermistor 14 is fixed by affixing aluminum foil tape, and the connection between the wire ear terminal 11, the tin wire 13 and the temperature control box 2 is protected by affixing electrical tape.

[0022] Furthermore, an EVA foam 16 is pasted on the NTC thermistor 14 , a mounting hole 17 is opened on the EVA foam 16 , and the EVA foam 16 is located on one side of the PET transparent film 33 . The NTC thermistor 14 is protected by pasting the EVA foam 16 .

[0023] Furthermore, the thickness of the PET transparent film 33 is 0.1 mm, the thickness of the PET insulating film 32 is 0.075 mm, and the thickness of the PVC insulating sheet 35 is 0.57 mm.

[0024] The working principle is as follows: first, print a silver conductive circuit on the surface of the PET transparent film 33, then print a far-infrared heating carbon paste sheet 31, and then cover the surface with a 0.075mm thick PET insulating film 32. The PET insulating film 32 and the PET transparent film 33 are coated with adhesive tape 34 for bonding with a 0.57mm thick PVC insulating sheet 35. The two PVC insulating sheets 35 are sealed by high-frequency pressing all around. The NTC thermistor 14 is fixed by affixing aluminum foil tape and then EVA foam 16 is attached for protection. The power cord 1 uses a four-core PVC sheathed wire, and a layer of electrical tape is attached at the connection point for protection. Connect the power cord 1 to the AC 120V After the 60HZ power supply, press the switch of the temperature control and setting module on the heating box 2 to set the temperature. After the temperature setting is completed, the far-infrared heating carbon paste sheet 31 heats up. When the working temperature reaches the set value, it is fed back to the temperature control and setting module through the NTC thermistor 14 to turn off the heating. When the temperature is lower than the set value, the NTC thermistor 14 feeds back to the temperature control and setting module to turn on the heating. In this way, the far-infrared heating carbon paste sheet 31 covers the entire PVC insulating sheet 35, which makes the temperature evenly transferred to the PVC insulating sheet 35. By building the NTC thermistor 14 into the heating sheet 3, the temperature of the mat can be detected in real time, and the data can be transmitted to the IC in time. The temperature is accurately controlled by the IC, and the temperature range can be adjusted from 0 to 50 degrees to avoid insufficient temperature or excessive temperature.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heating pad with precise temperature control, comprising a power cord (1); characterized in that: The power line (1) is connected to a temperature control box (2), the temperature control box (2) is provided with an IC and a temperature control and setting module, the temperature control box (2) is electrically connected to a heating plate (3), the power line (1) comprises two wire ear terminals (11) and two tin wires (13), the two wire ear terminals (11) and the two tin wires (13) are electrically connected to the temperature control box (2), the two tin wires (13) are electrically connected to the same NTC thermistor (14), the heating plate (3) comprises a PET transparent film (33), a silver conductive circuit is printed on the PET transparent film (33), the two wire ear terminals (11) are electrically connected to the PET transparent film (33), and the two wire ear terminals (11) are electrically connected to the PET transparent film (33). On the film (33), one side of the PET transparent film (33) is connected to a far-infrared heating carbon paste sheet (31), the far-infrared heating carbon paste sheet (31) covers the silver conductive circuit, one side of the far-infrared heating carbon paste sheet (31) is connected to a PET insulating film (32), one side of the PET insulating film (32) and the PET transparent film (33) are both pasted with self-adhesive tape (34), and PVC insulating sheets (35) are pasted on the two self-adhesive tapes (34), an NTC thermistor (14) is located between the PET insulating film (32) and the PET transparent film (33), and the two PVC insulating sheets (35) are sealed by high-frequency pressing.

2. A heating pad with precise temperature control according to claim 1, characterized in that: A heat shrinkable sleeve (12) is movably sleeved on the wire ear terminal (11), and a double-wall heat shrinkable sleeve (15) is movably sleeved on the tin wire (13).

3. A heating pad with precise temperature control according to claim 1, characterized in that: Electrical tape is adhered to the connection between the wire ear terminal (11), the tin wire (13) and the temperature control box (2), and the NTC thermistor (14) is adhered and installed on one side of the PET transparent film (33) using aluminum foil tape.

4. A heating pad with precise temperature control according to claim 1, characterized in that: The NTC thermistor (14) is pasted with an EVA foam (16), a mounting hole (17) is provided on the EVA foam (16), and the EVA foam (16) is located on one side of the PET transparent film (33).

5. A heating pad with precise temperature control according to claim 1, characterized in that: The thickness of the PET transparent film (33) is 0.1 mm, the thickness of the PET insulating film (32) is 0.075 mm, and the thickness of the PVC insulating sheet (35) is 0.57 mm.

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