Heating film and heating device for thromboelastograph

Abstract

The present invention discloses a heating film suitable for a thromboelastograph, which integrates a temperature sensor, a temperature fuse and a heater into one, ensures the original size, and is convenient for installation, improves the detection yield rate, simplifies the installation process, and adopts a heating device including the heating film, which improves the convenience, integrity and reliability of heating, simplifies the production process, can be directly installed and used, greatly reduces labor costs and improves the yield rate.

Description

Technical Field

[0001] The invention belongs to the field of heating detection of thromboelastographs, and in particular relates to a heating film and a heating device suitable for thromboelastographs. Background Art

[0002] Thromboelastography is an analyzer that monitors the coagulation process from the entire dynamic process. Thromboelastography is an indicator that reflects the dynamic changes of blood coagulation (including the formation speed of fibrin, the dissolution state and the firmness and elasticity of the coagulation). Therefore, the factors that affect the thromboelastography mainly include: the aggregation state of red blood cells, the rigidity of red blood cells, the speed of blood coagulation, the activity of the fibrinolytic system, etc. In order to improve the accuracy of the test, the reaction cup used to store the test blood sample needs to be kept at a set temperature to ensure the reliability of the test results;

[0003] Existing thromboelastographs usually use heating belts or heating sheets for heating, which have the disadvantages of being not flexible enough to evenly heat the blood to be tested, which easily affects the accuracy of blood testing.

[0004] Moreover, the existing heating belts or heating plates only have the function of heating, and do not include temperature sensors and temperature fuses, which are essential heating devices. These devices need to be welded, installed and insulated separately on the thromboelastograph. However, the space at the heating part of the thromboelastograph is small, and a heating device, an overheating temperature fuse and a temperature sensor need to be installed. Too many accessories will make it inconvenient to install in a small space. Summary of the invention

[0005] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is: how to provide a heating film suitable for a thromboelastograph, integrating a temperature sensor, a temperature fuse and a heater into one, ensuring the original size, and facilitating installation, improving the detection yield rate, simplifying the installation process, and using a heating device including the above-mentioned heating film, improving the convenience, integrity and reliability of heating, simplifying the production process, and being directly installed and used, greatly reducing labor costs and improving the yield rate.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solution: a heating film suitable for a thrombelastograph, the heating film comprising a printed layer, a first insulating film layer, a thermal conductive layer, a circuit layer and a second insulating film layer arranged in sequence from top to bottom, the circuit layer comprising a temperature fuse, a temperature sensor and a circuit interface, the temperature fuse and the temperature sensor are respectively connected to the input end of the circuit interface through wires, a heating zone is provided on the thermal conductive layer, the heating zone is located on the wire between the temperature sensor and the circuit interface, the heating zone and the wire of the circuit layer form a closed path, and the circuit interface is externally connected to a heating control circuit.

[0007] In some embodiments, in the above-mentioned heating film suitable for a thromboelastography instrument, the heating area is covered with low-resistance conductive ink, and the low-resistance conductive ink is connected to the wires of the circuit layer.

[0008] In some embodiments, in the above-mentioned heating film suitable for a thromboelastography instrument, the first insulating film layer and the second insulating film layer are made of polyimide film material.

[0009] In some embodiments, in the above-mentioned heating film suitable for the thromboelastography instrument, the heating film is long and L-shaped.

[0010] A heating device suitable for a thromboelastogram instrument includes a heating control circuit and a heating installation structure. The heating control circuit includes a heating film connection port, a heating control unit, a temperature acquisition unit and a temperature control detection unit. The heating control unit and the temperature control detection unit are respectively connected to the first terminal of the heating film connection port, the temperature acquisition unit is connected to the third terminal of the connection port, the second terminal and the fifth terminal of the heating film connection port are both hung in the air, the fourth terminal and the sixth terminal of the heating film connection port are respectively grounded, and the heating film connection port is used to electrically connect the circuit interface of the heating film.

[0011] In some embodiments, in the above-mentioned heating device suitable for a thromboelastography instrument, the heating control unit includes a heating control port, the output end of the heating control port is connected to the input end of an optocoupler through a first resistor, the output end of the optocoupler is connected to the source of a MOS tube through a second resistor, the gate of the MOS tube is connected to a VDD power supply through a third resistor, and the drain of the MOS tube is connected to the heating film connection port through an adjustable resistor.

[0012] In some embodiments, in the above-mentioned heating device suitable for a thromboelastography instrument, the temperature acquisition unit includes a temperature acquisition port, the input end of the temperature acquisition port is connected to the heating film connection port, a VCC power supply end is connected between the input end of the temperature acquisition port and the heating film connection port through a fourth resistor, a cathode of a first diode is also connected between the input end of the temperature acquisition port and the heating film connection port, and the anode of the first diode is grounded.

[0013] In some embodiments, in the above-mentioned heating device suitable for a thromboelastography instrument, the temperature control detection unit includes a temperature control monitoring port and a second diode, the input end of the temperature control monitoring port is connected to the heating film connection port through a fifth resistor, the cathode of the second diode is connected to the adjustable resistor, and the anode of the second diode is grounded through a sixth resistor.

[0014] In some embodiments, in the above-mentioned heating device suitable for a thrombelastograph, the heating installation structure includes a heating seat and a heat-conducting tube. A loading tray is provided on the top of the heating seat, and a heating tube is integrally formed on the bottom of the loading tray. The interior of the heating tube is connected with the loading tray to form a heating groove. A heat-conducting tube is provided inside the heating groove. A placement groove for placing a sample cup is provided on the heat-conducting tube. A ring groove for installing a heating film is provided on the outside of the heat-conducting tube. A mounting port is provided on one side of the heating groove that penetrates the heating tube, and the mounting port is connected with the heating groove. A connecting tube is provided at the bottom of the heating tube, and a through hole is provided between the connecting tube and the heating tube. The connecting tube is used to connect the thrombelastograph.

[0015] In some embodiments, in the above-mentioned heating device suitable for a thrombelastograph, the inner diameter of the heating tube is larger than the circular diameter of the through hole, and the height of the mounting opening is larger than the width of the annular groove.

[0016] Beneficial effects of the present invention:

[0017] 1. This solution independently designs the heating film, integrates the heating film, overheat temperature fuse, and temperature sensor into a flexible circuit, completely maintaining the original installation requirements, and simultaneously designs a pin connection interface that can be directly connected to the control circuit without intermediate switching.

[0018] 2. It improves the convenience, integrity and reliability of heating, simplifies the production process, and can be directly installed and used. It greatly reduces labor costs and improves the yield rate.

[0019] 3. Use low-resistance conductive ink for heating, which makes the heating more uniform and has good toughness and is not afraid of bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the heating film.

[0021] Figure 2 Schematic diagram of the various layers of the heating film.

[0022] Figure 3 This is the structural diagram of the heating control circuit.

[0023] Figure 4 Exploded view of the heating installation structure.

[0024] Figure 5 It is an overall schematic diagram of the heating installation structure.

[0025] Reference numerals: heating film 1, printed layer 16, first insulating film layer 17, heat conducting layer 18, circuit layer 19, second insulating film layer 15, temperature fuse 191, temperature sensor 192, heating area 181, circuit interface 193, wire 194, heat conducting tube 2, placement groove 21, ring groove 22, heating seat 3, loading plate 31, heating tube 32, heating groove 33, installation port 34, connecting tube 4. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] When implementing: Figure 1 to Figure 2 As shown, a heating film 1 suitable for a thromboelastography instrument comprises a printed layer 16, a first insulating film layer 17, a heat conductive layer 18, a circuit layer 19 and a second insulating film layer 15 arranged in sequence from top to bottom. The circuit layer 19 comprises a temperature fuse 191, a temperature sensor 192 and a circuit interface 193. The temperature fuse 191 and the temperature sensor 192 are respectively connected to the input end of the circuit interface 193 through a wire 194. A heating zone 181 is arranged on the heat conductive layer 18. The heating zone 181 is located on the wire 194 between the temperature sensor 192 and the circuit interface 193. The heating zone 181 and the wire 194 of the circuit layer 19 form a closed path. The circuit interface 193 is externally connected to a heating control circuit.

[0028] How this solution works:

[0029] The printed layer 16 is located at the top layer of the heating film 1, and is tightly attached to the first insulating film layer 17. It can be used for printing circuit connection schematics, text, graphics, etc. The first insulating film layer 17 is located at the second layer of the heating film 1, and is tightly attached to the bottom of the printed layer 16 on the top, and is tightly attached to the heat-conducting layer 18 on the bottom. A heating area 181 is arranged on the heat-conducting layer 18. The length of the heat-conducting area in the longitudinal direction is greater than or equal to the outer perimeter of the heat-conducting tube 2. The length of the heat-conducting area is 3-6 cm. The heat-conducting layer 18 is connected to the circuit layer 19, and the purpose is to form a passage for the heating area 181 through the circuit, thereby increasing the temperature of the heating area 181. Below the heat-conducting layer 18 is the circuit layer 19, which is the key layer of the entire heating film 1. The circuit layer 19 includes a temperature fuse 191. The temperature fuse 191 prevents excessive current in the circuit from affecting the test results. Because in the thromboelastography instrument, the heating temperature in the sample cup should be maintained at 37°, so as to ensure the accuracy of the test results. The temperature sensor 192 senses the temperature of the thermal tube 2, thereby obtaining the temperature in the sample cup in the thermal tube 2, which is convenient for controlling the temperature of the liquid to be tested in the sample cup. The wire 194 is not covered with an insulating shell, so that the wire 194 is in contact with the heating area 181, thereby forming a path with the heating area 181 to power the heating area 181. The circuit interface 193 adopts an FFC interface connection method and can be directly connected to the heating control circuit of the thromboelastography instrument without the need for switching. The second insulating film layer 15 is tightly connected below the circuit layer 19, and the first insulating film layer 17 and the second insulating film layer 15 ensure the insulation safety of the heating film 1.

[0030] Beneficial effects of this program:

[0031] The heating film 1 is designed independently, and the heating film 1, overheat temperature fuse 191, and temperature sensor 192 are integrated into a flexible circuit, completely maintaining the original installation requirements. A pin connection interface is designed simultaneously, which can be directly connected to the control circuit without intermediate switching.

[0032] In some embodiments, in the heating film 1 suitable for the thromboelastography instrument, the heating area 181 is covered with low-resistance conductive ink, and the low-resistance conductive ink is connected to the wire 194 of the circuit layer 19 .

[0033] The traditional heating film 1 uses a heating belt or copper wire to generate heat, which has the disadvantages of uneven heating, prone to some high-temperature heating points, and poor toughness that makes it difficult to bend and install. The low-resistance conductive ink in this solution uses carbon fiber, which generates heat more evenly and stably, and has good toughness and is not afraid of bending.

[0034] In some embodiments, in the heating film 1 suitable for the thromboelastography instrument, the first insulating film layer 17 and the second insulating film layer 15 are made of polyimide film material.

[0035] The good light transmittance and toughness of the polyimide film can make the film circuit have good flexibility. At the same time, the waterproofness and insulation of the polyimide film also ensure the insulation safety of the entire heating film 1.

[0036] In some embodiments, in the above-mentioned heating film 1 suitable for the thromboelastography instrument, the heating film 1 is long and L-shaped.

[0037] like Figure 4 As shown, in this way, the heating film 1 is conveniently wound onto the annular groove 22 outside the heating tube 32 to heat the heating tube 32. The L-shaped heating film 1 is convenient to extend from the installation opening 34 and then connected to the heating control circuit.

[0038] A heating device suitable for a thromboelastogram includes a heating control circuit and a heating mounting structure. The heating control circuit includes a heating film 1 connection port, a heating control unit, a temperature acquisition unit and a temperature control detection unit. The heating control unit and the temperature control detection unit are respectively connected to the first terminal of the heating film 1 connection port, the temperature acquisition unit is connected to the third terminal of the connection port, the second terminal and the fifth terminal of the heating film 1 connection port are both left unconnected, the fourth terminal and the sixth terminal of the heating film 1 connection port are respectively grounded, and the heating film 1 connection port is used to electrically connect the circuit interface 193 of the heating film 1.

[0039] The heating installation structure is mainly used in conjunction with the heating film 1 to be assembled on the thromboelastograph. The heating control circuit is mainly used to facilitate the temperature control of the heating film 1. The thromboelastograph collects temperature signals through the temperature acquisition unit, and combines the heating control unit for signal control. It adopts the PID temperature control algorithm and adjusts the pulse width of the heating control unit to achieve rapid heating and stable temperature control. The temperature control detection unit is used to detect the specific temperature of the heating film 1, which is convenient for temperature control and ensures the detection results.

[0040] In some embodiments, in the above-mentioned heating device suitable for a thromboelastography instrument, the heating control unit includes a heating control port, the output end of the heating control port is connected to the input end of the optocoupler through a first resistor, the output end of the optocoupler is connected to the source of the MOS tube through a second resistor, the gate of the MOS tube is connected to the VDD power supply through a third resistor, and the drain of the MOS tube is connected to the heating film 1 connection port through an adjustable resistor.

[0041] In some embodiments, in the above-mentioned heating device suitable for a thromboelastography instrument, the temperature acquisition unit includes a temperature acquisition port, the input end of the temperature acquisition port is connected to the heating film 1 connection port, a VCC power supply end is connected between the input end of the temperature acquisition port and the heating film 1 connection port through a fourth resistor, a cathode of a first diode is also connected between the input end of the temperature acquisition port and the heating film 1 connection port, and the anode of the first diode is grounded.

[0042] In some embodiments, in the above-mentioned heating device suitable for a thrombelastograph, the temperature control detection unit includes a temperature control monitoring port and a second diode, the input end of the temperature control monitoring port is connected to the connection port of the heating film 1 through a fifth resistor, the cathode of the second diode is connected to the adjustable resistor, and the anode of the second diode is grounded through a sixth resistor.

[0043] like Figure 3 As shown, the heating film 1 is connected to the port P1, PWM is the heating control port, AD1 is the temperature acquisition port, AD2 is the temperature control monitoring port, the first resistor is R1, the second resistor is R2, the third resistor is R3, the fourth resistor is R4, the fifth resistor is R5, the sixth resistor is R6, the first diode is D1, the second diode is D2, the optical coupler is U1, the MOS tube is Q1, and the adjustable resistor is RT1. The optical coupler plays an isolating role in the heating control port. In order to ensure the linear amplification effect of the heating control unit, the MOS tube is used as a switching component of the heating control unit to facilitate the PWM adjustment of the control signal. The adjustable resistor is used to control the heating temperature. The thromboelastogram collects the temperature signal through the AD1 signal, combines the preset temperature requirement value, and controls it by adopting the PWM signal. By adopting the PID temperature control algorithm, the pulse width of the PWM is adjusted to achieve rapid heating and stable temperature control.

[0044] In some embodiments, in the above-mentioned heating device suitable for a thromboelastograph, the heating installation structure includes a heating seat 3 and a heat-conducting tube 2. A loading tray 31 is provided on the top of the heating seat 3. A heating tube 32 is integrally formed at the bottom of the loading tray 31. The interior of the heating tube 32 is connected to the loading tray 31 to form a heating groove 33. A heat-conducting tube 2 is provided inside the heating groove 33. A placement groove 21 for placing a sample cup is provided on the heat-conducting tube 2. An annular groove 22 for installing a heating film 1 is provided on the outer side of the heat-conducting tube 2. A mounting opening 34 is provided on one side of the heating groove 33 that penetrates the heating tube 32. The mounting opening 34 is connected to the heating groove 33. A connecting tube 4 is provided at the bottom of the heating tube 32. A through hole is provided between the connecting tube 4 and the heating tube 32. The connecting tube 4 is used to connect the thromboelastograph.

[0045] Among them, the heating seat 3 is an insulating material, and the heat-conducting tube 2 is a heat-conducting metal material, preferably aluminum. During installation, the heating area 181 of the heating film 1 is wound and fixed to the annular groove 22 on the outside of the heat-conducting tube 2, and then the heat-conducting tube 2 is placed in the heating groove 33 of the heating seat 3, and one end of the heating film 1 provided with a circuit interface 193 is extended from the installation port 34, and then the connecting tube 4 is connected to the thromboelastography instrument, and the circuit interface 193 of the heating film 1 extending from the installation port 34 is connected to the heating control circuit, and finally the sample cup is placed in the heat-conducting tube 2, so as to realize heating of the sample cup. The sample cup is generally made of heat-conducting metal, so it can realize heating of the test liquid in the cup.

[0046] In this way, the convenience, integrity and reliability of heating are improved, the production process is simplified, and it can be directly installed and used, which greatly reduces labor costs and improves the yield rate.

[0047] The above are only preferred implementations of the present invention. It should be pointed out that a number of modifications and improved technical solutions made by those skilled in the art without departing from the technical solution should also be deemed to fall within the scope of protection required by the claims.

Claims

1. Suitable for heating membrane of thromboelastograph, Features: The heating film includes a printed layer, a first insulating film layer, a heat-conducting layer, a circuit layer and a second insulating film layer arranged in sequence from top to bottom. The circuit layer includes a temperature fuse, a temperature sensor and a circuit interface. The temperature fuse and the temperature sensor are respectively connected to the input end of the circuit interface through wires. The temperature fuse is used to prevent excessive current from affecting the detection result and ensure that the heating temperature in the sample cup is maintained at 37°. A heating zone is provided on the heat-conducting layer. The heating zone is located on the wire between the temperature sensor and the circuit interface. The heating zone and the wire of the circuit layer form a closed path. The circuit interface is used for an external heating control circuit. The heating film is long and L-shaped.

2. The heating film for thromboelastograph according to claim 1, Features: The heating area is covered with low-resistance conductive ink, and the low-resistance conductive ink is connected to the wire of the circuit layer.

3. The heating film suitable for a thromboelastograph according to claim 2, Features: The first insulating film layer and the second insulating film layer are made of polyimide film material.

4. A heating device suitable for a thromboelastograph, Features: It includes a heating control circuit and a heating installation structure, the heating control circuit includes a heating film connection port, a heating control unit, a temperature acquisition unit and a temperature control detection unit, the heating control unit and the temperature control detection unit are respectively connected to the first terminal of the heating film connection port, the temperature acquisition unit is connected to the third terminal of the connection port, the second terminal and the fifth terminal of the heating film connection port are both hung in the air, the fourth terminal and the sixth terminal of the heating film connection port are respectively grounded, the heating film connection port is used to electrically connect the circuit interface of the heating film, and the heating film is a heating film suitable for a thromboelastography instrument as described in any one of claims 1-3.

5. A heating device suitable for a thromboelastograph according to claim 4, Features: The heating control unit includes a heating control port, the output end of the heating control port is connected to the input end of the optocoupler through a first resistor, the output end of the optocoupler is connected to the source of the MOS tube through a second resistor, the gate of the MOS tube is connected to the VDD power supply through a third resistor, and the drain of the MOS tube is connected to the heating film connection port through an adjustable resistor.

6. A heating device suitable for a thromboelastograph according to claim 5, Features: The temperature acquisition unit includes a temperature acquisition port, an input end of the temperature acquisition port is connected to the heating film connection port, a VCC power supply end is connected between the input end of the temperature acquisition port and the heating film connection port via a fourth resistor, a cathode of a first diode is also connected between the input end of the temperature acquisition port and the heating film connection port, and an anode of the first diode is grounded.

7. A heating device suitable for a thromboelastograph according to claim 6, Features: The temperature control detection unit includes a temperature control monitoring port and a second diode, the input end of the temperature control monitoring port is connected to the heating film connection port through a fifth resistor, the cathode of the second diode is connected to the adjustable resistor, and the anode of the second diode is grounded through a sixth resistor.

8. A heating device suitable for a thromboelastograph according to claim 7, Features: The heating installation structure includes a heating seat and a heating cylinder. A loading tray is arranged on the top of the heating seat. A heating cylinder is integrally formed at the bottom of the loading tray. The interior of the heating cylinder is connected with the loading tray to form a heating groove. The heating cylinder is arranged inside the heating groove. A placement groove for placing a sample cup is provided on the heating cylinder. A ring groove for winding a heating film is provided around the outer side of the heating cylinder. A mounting port is provided on one side of the heating groove that penetrates the heating cylinder. The mounting port is connected with the heating slot. A connecting cylinder is provided at the bottom of the heating cylinder. A through hole is provided between the connecting cylinder and the heating cylinder. The connecting cylinder is used to connect a thromboelastography instrument.

9. A heating device suitable for a thromboelastograph according to claim 8, Features: The inner diameter of the heating cylinder is larger than the circular diameter of the through hole, and the height of the mounting opening is larger than the width of the annular groove.

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