Medical fluid heating device

Abstract

The utility model relates to a medical fluid heating device which comprises a heating pipe, an upper connector, a lower connector, a temperature controller and a heating circuit. The heating pipe is 8-shaped and is provided with a fluid pipe wrapping hole, and the front end of the fluid pipe wrapping hole is opened; the heating pipe is further provided with four heating wire holes, and side holes are formed in the outer sides of the four heating wire holes in a bilateral symmetry mode. A reinforcing rib is arranged on the central arc-shaped concave surface of the rear end surface of the heating pipe; a second fluid pipe hole is formed in the axial center of the upper connecting part, and the front end is open; the lower connector is provided with a third fluid pipe hole and an opening at the front end; the upper connector and the lower connector are respectively arranged at the upper and lower ends of the heating pipe in a close fit manner; the heating circuit comprises four composite heating wires R1 and a fuse FU1, the four composite heating wires R1 are arranged in the corresponding heating wire holes of the heating pipe respectively, and the composite heating wires R1 are electrically connected with the fuse FU1. The medical fluid heating device is convenient to use and good in safety.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a device for heating medical fluids such as infusion, blood transfusion, and nutrient solution. Background Art

[0002] Existing medical fluid heating devices usually use heating wires to heat infusion tubes to provide users with a comfortable infusion experience. However, although current heating devices are equipped with temperature sensors, if the temperature sensor fails, the heating wire will continue to work, causing irreversible thermal damage to the user.

[0003] In addition, current heating devices such as Chinese patent documents CN 106890385 B and CN 106964032 B both disclose an infusion heating device, which has a complex structure and is very troublesome to install on the infusion tube. Both installation and removal require installation training, which is not conducive to widespread application. It cannot heat the entire infusion pipeline or most of it, and the heating effect is too poor. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a medical fluid heating device which is easy to use and has good safety.

[0005] The technical solution to achieve the purpose of the utility model is to provide a medical fluid heating device, including a heating tube, an upper connector, a lower connector, a temperature controller and a heating circuit;

[0006] The heating tube is in the shape of "∞", and a fluid tube wrapping hole is provided in the axial center thereof, which runs through the fluid tube wrapping hole up and down, and an opening is provided at the front end of the fluid tube wrapping hole over the entire axial length; the heating tube is provided with 4 heating wire holes at the four corners around the fluid tube wrapping hole, and two oblong circular side holes running through the four heating wire holes are provided symmetrically on the left and right sides; the central arc-shaped concave surface of the rear end face of the heating tube is provided with continuously arranged reinforcing ribs with a cross section in the shape of an obtuse triangle;

[0007] The upper connector includes a shuttle-shaped upper connecting portion and a hanging portion connected to the center of the rear end surface of the upper connecting portion. The axial center of the upper connecting portion is provided with a second fluid tube hole penetrating vertically. The front end of the second fluid tube hole is opened along the entire axial length. The cross section of the hanging portion is elliptical.

[0008] The lower connector is also in an "∞" shape. A third fluid tube hole is provided in the axial center of the lower connector, which runs through the third fluid tube hole from top to bottom. The front end of the third fluid tube hole is opened along the entire axial length.

[0009] The upper connector and the lower connector are respectively tightly fitted at the upper and lower ends of the heating tube; the fluid tube wrapping hole, the second fluid tube hole and the third fluid tube hole penetrate from top to bottom;

[0010] The heating circuit includes four composite heating wires R1 and a fuse FU1. The four composite heating wires R1 are respectively arranged in corresponding heating wire holes of the heating tube, and the composite heating wire R1 is electrically connected to the fuse FU1.

[0011] Furthermore, the upper connecting part is provided with a first heating tube groove opening downward, and the shape of the first heating tube groove corresponds to the heating tube, and the upper connecting part is provided with a circuit connecting tube groove opening downward beside the first heating tube groove; the lower connecting head is provided with a second heating tube groove opening upward, and the shape of the second heating tube groove corresponds to the heating tube; the upper connecting head is tightly fitted at the upper end of the heating tube by the first heating tube groove of its upper connecting part, and the lower connecting head is tightly fitted at the lower end of the heating tube by the second heating tube groove.

[0012] Furthermore, the diameter of the fluid tube wrapping hole is 3.6mm, 5mm, 7mm or 9.5mm, the front end opening gap of the heating tube is 0.2 to 0.8mm; the minimum front end opening gap of the upper connecting head is 1mm; the minimum front end opening gap of the lower connecting head is 1mm; the cross-sectional shape of the lower connecting head is 1.3 to 1.5 times that of the heating tube; the length of the entire heating tube, the upper connecting head and the lower connecting head is 600mm, 700mm, 1000mm, 1100mm, 1200mm or 1400mm.

[0013] Furthermore, the heating tube, the upper connector and the lower connector are all made of vulcanized silicone rubber mixed with silicone rubber and platinum vulcanizer, and the surfaces are sprayed with silicone rubber special hand oil; the heating tube, the upper connector and the lower connector are integrally formed by solid silicone rubber molding;

[0014] A hanging hole or a hook is arranged on the hanging portion.

[0015] Furthermore, the heating circuit also includes a thermistor temperature sensing head RT1 and a temperature controller; the four composite heating wires R1 are divided into two groups, the two composite heating wires R1 in each group of composite heating wires R1 are connected in parallel, the two groups of composite heating wires R1 are connected in series, and a fuse FU1 is connected between the two groups of composite heating wires R1; the thermistor temperature sensing head RT1 and the fuse FU1 are respectively arranged in the side holes on both sides of the fluid tube wrapping hole, and a temperature sensor T1, T2 is respectively arranged next to the thermistor temperature sensing head RT1 and the fuse FU1, and each connecting wire is electrically connected to the thermostat.

[0016] Furthermore, the thermistor temperature sensing head RT1 and the fuse FU1 are both arranged 2 to 100 mm away from the bottom of the second heating tube groove of the lower connecting head. The connecting wires are merged into the circuit connection tube groove through the side holes and are electrically connected to the temperature controller through a wire connector or a Luer connector.

[0017] Furthermore, the thermistor temperature sensing head RT1 is arranged 100 mm away from the bottom of the second heating tube groove of the lower connecting head and located in the side hole near the circuit connecting tube groove, and the fuse FU1 is arranged 50 mm away from the bottom of the second heating tube groove of the lower connecting head and located in the side hole on the other side.

[0018] Furthermore, the thermostat is made of aluminum alloy with a temperature control screen to set the temperature, and a transformer, an integrated circuit board, and a temperature disconnect receiver are arranged in the thermostat.

[0019] Furthermore, the composite heating wire R1 is wrapped with an outer tube made of Teflon material; the resistance of the composite heating wire R1 is 5-10 ohms.

[0020] Furthermore, the heating circuit also includes a thermistor temperature sensing head RT1 and a temperature controller; the four composite heating wires R1 are divided into two groups, the two composite heating wires R1 in each group of composite heating wires R1 are connected in parallel, the two groups of composite heating wires R1 are connected in series, and a fuse FU1 is connected between the two groups of composite heating wires R1; the thermistor temperature sensing head RT1 and the fuse FU1 are respectively arranged in the side holes on both sides of the fluid tube wrapping hole, and a temperature sensor T1, T2 is respectively arranged next to the thermistor temperature sensing head RT1 and the fuse FU1, and each connecting wire is electrically connected to the thermostat.

[0021] The utility model has positive effects: (1) A medical fluid heating device of the utility model is used for heating medical fluids such as infusion, blood transfusion, and nutrient solution. The silicone rubber heating tube has a fast heating speed and high heating accuracy. Four composite heating wires are arranged. The product is heated into a ring shape, and the heating is more uniform. On the basis of two temperature sensors T1 and T2, a temperature protector, namely a thermistor temperature sensing head RT1 and a fuse FU1, is arranged in the heating tube. When the temperature control setting protection temperature reaches the upper limit value, the fuse FU1 automatically disconnects the heating, and the thermostat 4 receives the signal from the thermistor temperature sensing head RT1 to stop heating. The safety and stability are excellent.

[0022] (2) The medical fluid heating device of the utility model has an "∞"-shaped heating tube, and an obtuse-angled triangular reinforcing rib is provided on the arc-shaped concave surface of the rear end face. The front end opening of the heating tube is easy to open and insert the infusion tube due to the cavity setting of the rear end arc-shaped concave surface and the side hole. The reaction force of the rear end arc-shaped concave surface is more conducive to the retraction and covering of the front end opening. The obtuse-angled triangular reinforcing rib is easy to open when the front end opening is opened, and the service life of the opening is further guaranteed.

[0023] (3) The opening of the upper connector of the medical fluid heating device of the utility model is V-shaped and easy to open, and the cross-section of the hanging part is elliptical and used for hanging the entire medical fluid heating device. The hanging part can be further provided with a hanging hole or a hook. The opening of the lower connector is V-shaped and easy to open.

[0024] (4) The heating tube, upper connector and lower connector of the medical fluid heating device of the utility model are all made of vulcanized silicone rubber mixed with silicone rubber and platinum vulcanizer, and the surfaces are sprayed with silicone rubber special hand feeling oil. The upper connector is tightly fitted with the first heating tube groove of its upper connecting part and is set at the upper end of the heating tube, and the lower connector is tightly fitted with the second heating tube groove and is set at the lower end of the heating tube. It is molded in one piece with solid silicone rubber. The molded joint can withstand a pressure of 5KG without falling off, and has excellent waterproofness, meeting the medical high temperature and high pressure disinfection conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A structural schematic diagram (front view) of a medical fluid heating device of the utility model;

[0026] Figure 2 for Figure 1 An enlarged schematic diagram of the heating tube in FIG. 1 ;

[0027] Figure 3 for Figure 1 An enlarged bottom view of the upper connector in FIG.

[0028] Figure 4 A three-dimensional schematic diagram of the upper connector;

[0029] Figure 5 for Figure 1 An enlarged bottom view of the lower connector in FIG.

[0030] Figure 6 is a three-dimensional schematic diagram of the lower connector;

[0031] Figure 7 The utility model is a circuit diagram of a heating circuit of a medical fluid heating device.

[0032] The markings in the above drawings are as follows: heating tube 1, fluid tube wrapping hole h1, reinforcing rib 11, upper connecting head 2, upper connecting part 21, hanging part 22, first heating tube groove s1, lower connecting head 3, second heating tube groove s2, thermostat 4. DETAILED DESCRIPTION

[0033] (Example 1)

[0034] See Figure 1 A medical fluid heating device of this embodiment includes a heating tube 1, an upper connector 2, a lower connector 3, a temperature controller 4 and a heating circuit.

[0035] See Figure 2The heating tube 1 is in the shape of "∞", and a fluid tube wrapping hole h1 is provided in the axial center thereof, which runs through the fluid tube wrapping hole h1 from top to bottom. The diameter of the fluid tube wrapping hole h1 is 3.6mm, 5mm, 7mm or 9.5mm to adapt to various infusion tubes. In this embodiment, 3.6mm is used. The front end of the fluid tube wrapping hole h1 is provided with an opening along the entire axial length, and the opening gap is 0.3mm; the heating tube 1 is provided with 4 heating wire holes at the four corners around the fluid tube wrapping hole h1, and two oblong side holes running through the four heating wire holes are symmetrically provided on the left and right sides; the rear of the heating tube 1 The central arc concave surface of the end face is provided with a continuously arranged reinforcing rib 11 with an obtuse triangle cross section. Since the heating tube is in an "∞" shape, and the arc concave surface of the rear end face is provided with an obtuse triangle reinforcing rib 11, the front end opening of the heating tube 1 is easy to open and insert the infusion tube due to the cavity setting of the rear end arc concave surface and the side hole. The reaction force of the rear end arc concave surface is more conducive to the retraction and covering of the front end opening. The obtuse triangle reinforcing rib 11 is easy to open when the front end opening is opened, and the service life of the opening is further guaranteed.

[0036] See Figure 3 and Figure 4 The upper connector 2 includes a shuttle-shaped upper connecting portion 21 and a hanging portion 22 connected to the center of the rear end surface of the upper connecting portion 21. The upper connecting portion 21 is provided with a first heating tube groove s1 opening downward. The shape of the first heating tube groove s1 corresponds to the heating tube 1. The axial center of the upper connecting portion 21 is provided with a second fluid tube hole that runs through the first heating tube groove s1 from top to bottom. The upper connecting portion 21 is provided with a circuit connection tube groove opening downward on the side of the first heating tube groove s1; the front end of the second fluid tube hole is provided with an opening along the entire axial length, the opening is V-shaped and easy to open, and the minimum opening gap is 1mm. The cross section of the hanging portion 22 is elliptical and is used to hang the entire medical fluid heating device. The hanging portion 22 can be further provided with a hanging hole or a hook.

[0037] See Figure 5 and Figure 6 The lower connecting head 3 is also in an "∞" shape, and its cross-sectional shape is 1.3 to 1.5 times that of the heating tube 1. The lower connecting head 3 is provided with a second heating tube groove s2 opening upward, and the shape of the second heating tube groove s2 corresponds to the heating tube 1. The axial center of the lower connecting head 3 is provided with a third fluid tube hole penetrating up and down and located in the second heating tube groove s2. The front end of the third fluid tube hole is opened along the entire axial length, and the opening is V-shaped and easy to open, and the minimum opening gap is 1mm.

[0038] The heating tube 1, the upper connector 2 and the lower connector 3 are all made of vulcanized silicone rubber mixed with silicone rubber and platinum vulcanizer, and the surfaces are sprayed with silicone rubber special hand-feeling oil. The upper connector 2 is tightly fitted at the upper end of the heating tube 1 by the first heating tube groove s1 of its upper connecting part 21, and the lower connector 3 is tightly fitted at the lower end of the heating tube 1 by the second heating tube groove s2. In this embodiment, solid silicone rubber is molded in one piece, and the molded joint can withstand a pressure of 5KG without falling off, and the fluid tube wrapping hole h1, the second fluid tube hole and the third fluid tube hole are passed through from top to bottom. The length of the entire heating tube 1, the upper connector 2 and the lower connector 3 is 600mm, 700mm, 1000mm, 1100mm, 1200mm or 1400mm, and 1200mm is used in this embodiment.

[0039] See Figure 7 The heating circuit includes 4 composite heating wires R1, a fuse FU1, a thermistor temperature sensing head RT1 and a temperature controller 4. The composite heating wire R1 is wrapped with an outer tube made of Teflon material, which is heat-resistant and corrosion-resistant. The resistance of the composite heating wire R1 is 5-10 ohms, and 7.5 ohms is used in this embodiment. The four composite heating wires R1 are arranged in the corresponding heating wire holes of the heating tube 1. The 4 composite heating wires R1 are divided into two groups. The 2 composite heating wires R1 in each group of composite heating wires R1 are connected in parallel, and the two groups of composite heating wires R1 are connected in series. The fuse FU1 is connected between the two groups of composite heating wires R1. The thermistor temperature sensing head RT1 and the fuse FU1 are both arranged at 2 to 100 mm from the bottom of the second heating tube groove s2 of the lower connecting head 3. The thermistor temperature sensing head RT1 and the fuse FU1 are respectively arranged in the side holes on both sides of the fluid tube wrapping hole h1. In this embodiment, the thermistor temperature sensing head RT1 is arranged at 100 mm from the bottom of the second heating tube groove s2 of the lower connecting head 3 and is located in the side hole near the circuit connecting tube groove. The fuse FU1 is arranged at 50 mm from the bottom of the second heating tube groove s2 of the lower connecting head 3 and is located in the side hole on the other side. A temperature sensor T1 and T2 are respectively arranged next to the thermistor temperature sensing head RT1 and the fuse FU1. The connecting wires are merged into the circuit connecting tube groove through the side holes and are electrically connected to the thermostat 4 through a wire connector or a Luer connector. The thermostat 4 is made of aluminum alloy with a temperature control screen to set the temperature. A transformer, an integrated circuit board, and a temperature disconnect receiver are arranged in the thermostat 4.

[0040] When a medical fluid heating device of the present embodiment is used, the front end openings of the fluid tube wrapping hole h1, the second fluid tube hole and the third fluid tube hole are opened, and the infusion tube is clamped in the fluid tube wrapping hole h1, the second fluid tube hole and the third fluid tube hole. The infusion tube is heated in a ring shape by four composite heating wires R1, and the heating is uniform. On the basis of having two temperature sensors T1 and T2, a temperature protector, namely a thermistor temperature sensing head RT1 and a fuse FU1, is arranged in the heating tube 1. When the temperature control setting protection temperature reaches the upper limit value, the fuse FU1 automatically disconnects the heating, and the temperature controller 4 stops heating after receiving the signal of the thermistor temperature sensing head RT1, and the safety and stability are excellent.

[0041] Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A medical fluid heating device, characterized in that: It comprises a heating tube (1), an upper connector (2), a lower connector (3), a temperature controller (4) and a heating circuit; The heating tube (1) is in an "∞" shape, and a fluid tube wrapping hole (h1) is provided in the axial center thereof, which passes through the fluid tube wrapping hole (h1) vertically, and an opening is provided at the front end of the fluid tube wrapping hole (h1) over the entire axial length; the heating tube (1) is provided with four heating wire holes at the four corners around the fluid tube wrapping hole (h1), and two oblong circular side holes passing through the fluid tube wrapping hole (h1) are symmetrically provided on the outside of the four heating wire holes; a continuously arranged reinforcing rib (11) having an obtuse triangle cross section is provided on the central arc-shaped concave surface of the rear end face of the heating tube (1); The upper connector (2) comprises a shuttle-shaped upper connecting portion (21) and a hanging portion (22) connected to the center of the rear end surface of the upper connecting portion (21); a second fluid tube hole penetrating vertically is provided in the axial center of the upper connecting portion (21); an opening is provided at the front end of the second fluid tube hole over the entire axial length; and the hanging portion (22) has an elliptical cross section; The lower connecting head (3) is also in an "∞" shape. A third fluid tube hole is provided in the axial center of the lower connecting head (3) and runs through the lower and upper sides. The front end of the third fluid tube hole is provided with an opening along the entire axial length. The upper connector (2) and the lower connector (3) are respectively tightly fitted and arranged at the upper and lower ends of the heating tube (1); the fluid tube wrapping hole (h1), the second fluid tube hole and the third fluid tube hole penetrate vertically; The heating circuit comprises four composite heating wires R1 and a fuse FU1; the four composite heating wires R1 are respectively arranged in corresponding heating wire holes of the heating tube (1), and the composite heating wires R1 are electrically connected to the fuse FU1.

2. A medical fluid heating device according to claim 1, characterized in that: The upper connecting portion (21) is provided with a first heating tube groove (s1) opening downwards, the shape of the first heating tube groove (s1) corresponding to the heating tube (1), and the upper connecting portion (21) is provided with a circuit connecting tube groove opening downwards beside the first heating tube groove (s1); the lower connecting head (3) is provided with a second heating tube groove (s2) opening upwards, the shape of the second heating tube groove (s2) corresponding to the heating tube (1); the upper connecting head (2) is tightly fitted with the first heating tube groove (s1) of the upper connecting portion (21) and is arranged at the upper end of the heating tube (1), and the lower connecting head (3) is tightly fitted with the second heating tube groove (s2) and is arranged at the lower end of the heating tube (1).

3. A medical fluid heating device according to claim 2, characterized in that: The diameter of the fluid tube wrapping hole (h1) is 3.6 mm, 5 mm, 7 mm or 9.5 mm, the front end opening gap of the heating tube (1) is 0.2 to 0.8 mm; the front end opening gap of the upper connecting head (2) is 1 mm at the minimum; the front end opening gap of the lower connecting head (3) is 1 mm at the minimum; the cross-sectional shape of the lower connecting head (3) is 1.3 to 1.5 times that of the heating tube (1); the length of the entire heating tube (1), the upper connecting head (2) and the lower connecting head (3) is 600 mm, 700 mm, 1000 mm, 1100 mm, 1200 mm or 1400 mm.

4. A medical fluid heating device according to claim 2, characterized in that: The heating tube (1), the upper connecting head (2) and the lower connecting head (3) are all made of vulcanized silicone rubber mixed with silicone rubber and platinum vulcanizing agent, and the surfaces are all sprayed with special silicone rubber hand-feel oil; the heating tube (1), the upper connecting head (2) and the lower connecting head (3) are integrally formed by solid silicone rubber molding; A hanging hole or a hook is provided on the hanging portion (22).

5. The medical fluid heating device according to claim 2, characterized in that: The heating circuit also includes a thermistor temperature sensing head RT1 and a temperature controller (4); the four composite heating wires R1 are divided into two groups, the two composite heating wires R1 in each group of composite heating wires R1 are connected in parallel, the two groups of composite heating wires R1 are connected in series, and a fuse FU1 is connected between the two groups of composite heating wires R1; the thermistor temperature sensing head RT1 and the fuse FU1 are respectively arranged in side holes on both sides of the fluid pipe wrapping hole (h1), and a temperature sensor T1, T2 is respectively arranged next to the thermistor temperature sensing head RT1 and the fuse FU1, and each connecting wire is electrically connected to the temperature controller (4).

6. A medical fluid heating device according to claim 5, characterized in that: The thermistor temperature sensing head RT1 and the fuse FU1 are both arranged at a distance of 2 to 100 mm from the bottom of the second heating tube groove (s2) of the lower connecting head (3). The connecting wires are connected to the circuit connection tube groove through the side holes and are electrically connected to the temperature controller (4) by means of a wire connector or a Luer connector.

7. A medical fluid heating device according to claim 6, characterized in that: The thermistor temperature sensing head RT1 is arranged at a distance of 100 mm from the bottom of the second heating tube groove (s2) of the lower connecting head (3) and is located in a side hole close to the circuit connecting tube groove. The fuse FU1 is arranged at a distance of 50 mm from the bottom of the second heating tube groove (s2) of the lower connecting head (3) and is located in a side hole on the other side.

8. The medical fluid heating device according to claim 6, characterized in that: The temperature controller (4) is made of aluminum alloy with a temperature control screen capable of setting the temperature. A transformer, an integrated circuit board, and a temperature disconnection receiver are arranged in the temperature controller (4).

9. A medical fluid heating device according to claim 8, characterized in that: The composite heating wire R1 is wrapped with an outer tube made of Teflon material; the resistance of the composite heating wire R1 is 5-10 ohms.

10. The medical fluid heating device according to claim 1, characterized in that: The heating circuit also includes a thermistor temperature sensing head RT1 and a temperature controller (4); the four composite heating wires R1 are divided into two groups, the two composite heating wires R1 in each group of composite heating wires R1 are connected in parallel, the two groups of composite heating wires R1 are connected in series, and a fuse FU1 is connected between the two groups of composite heating wires R1; the thermistor temperature sensing head RT1 and the fuse FU1 are respectively arranged in side holes on both sides of the fluid pipe wrapping hole (h1), and a temperature sensor T1, T2 is respectively arranged next to the thermistor temperature sensing head RT1 and the fuse FU1, and each connecting wire is electrically connected to the temperature controller (4).

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