CN214970426U - Transfusion heating device - Google Patents
Transfusion heating device Download PDFInfo
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- CN214970426U CN214970426U CN202121194884.0U CN202121194884U CN214970426U CN 214970426 U CN214970426 U CN 214970426U CN 202121194884 U CN202121194884 U CN 202121194884U CN 214970426 U CN214970426 U CN 214970426U
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Abstract
The utility model provides an infusion heating device, its characterized in that includes the shell, heating device, the fan, temperature sensor and control circuit, be equipped with hot-air supply passageway and transfer line heating channel on the shell, the end of giving vent to anger of hot-air supply passageway communicates with the inlet end of transfer line heating channel, the fan is installed on hot-air supply passageway, heating device locates in the hot-air supply passageway, temperature sensor is connected with the corresponding input electricity of control circuit, heating device is connected with the corresponding output electricity of control circuit. The utility model discloses utilize the heat exchange between hot-air and the transfer line, comparatively heat and make its intensification to the liquid of transfer line and its inside uniformly to avoid the high temperature through temperature detection and control, thereby make the internal liquid of infusion in-process input patient keep suitable temperature, effectively avoid the patient to feel uncomfortable in the infusion in-process, ensure infusion treatment and infusion security.
Description
Technical Field
The utility model relates to a medical instrument, concretely relates to infusion heating device.
Background
Infusion is a common treatment. In cold winter, or when the temperature of the liquid to be infused is low (especially when the infused liquid is refrigerated), the temperature of the liquid (medical liquid or blood) infused into the human body is too low during infusion, which causes the patient to feel cold, and the blood vessel is easy to be stimulated, so that the patient feels uncomfortable and even the treatment effect is affected. At present, most of the infusion heating devices are used for heating an infusion bottle (or an infusion bag) or an infusion tube, so as to indirectly heat liquid in the infusion bottle (or the infusion bag) or the infusion tube, and improve the temperature of the liquid infused into a patient body.
However, in the existing transfusion heating device, during the process of heating the transfusion liquid, the temperature of the transfusion liquid is often too high (for example, when the liquid flow in the transfusion tube is too small or suspended, the temperature of the transfusion liquid is often too high), but the transfusion liquid cannot be quickly cooled to a proper temperature, and the patient feels uncomfortable due to the too high transfusion temperature, and more seriously, during the transfusion, if the temperature of the transfusion liquid is too high, cells in the blood can die and clot, so that the blood loses its function, even thrombus can be formed after being transfused into the human body, and medical accidents occur.
Therefore, it is very important to develop an infusion heating device capable of rapidly heating or cooling the infused liquid to keep the infused liquid at a proper temperature during the infusion process, so as to reduce the discomfort of the patient and ensure the treatment effect and the safety of the patient.
Disclosure of Invention
The utility model aims to solve the technical problem that a transfusion heating device is provided, which can ensure that the liquid input into the body of a patient in the transfusion process keeps a proper temperature. The technical scheme is as follows:
the utility model provides an infusion heating device, its characterized in that includes the shell, heating device, the fan, temperature sensor and control circuit, be equipped with hot-air supply passageway and transfer line heating channel on the shell, the end of giving vent to anger of hot-air supply passageway communicates with the inlet end of transfer line heating channel, the fan is installed on hot-air supply passageway, heating device locates in the hot-air supply passageway, temperature sensor is connected with the corresponding input electricity of control circuit, heating device is connected with the corresponding output electricity of control circuit.
The fan can be electrically connected with the corresponding output end of the control circuit; the fan can also be directly connected with a power supply. The temperature sensor can be mounted in the heating channel of the infusion tube, in the housing or on the surface of the housing. The infusion heating device can further comprise a display screen, the display screen is installed on the surface of the shell and is electrically connected with the corresponding output end of the control circuit, and the display screen can display the temperature value detected by the temperature sensor. The control circuit can adopt a singlechip or a CPU.
When the infusion heating device is used, a section of infusion tube is arranged in the heating channel of the infusion tube; after the power supply is switched on, under the driving of the fan, air enters the hot air supply channel from the air inlet end of the hot air supply channel and flows through the hot air supply channel and the infusion tube heating channel in sequence, the air is heated by the heating device to be heated when flowing through the hot air supply channel to form hot air, the liquid in the infusion tube is heated and heated when the hot air flows through the infusion tube heating channel, and then the hot air is discharged from the air outlet end of the infusion tube heating channel. The temperature sensor can detect the temperature of the tube wall of the infusion tube between the heating channel of the infusion tube and the infusion needle (the detection point of the temperature sensor is close to the heating channel of the infusion tube, the temperature of the tube wall can reflect the temperature of liquid in the infusion tube), and the temperature value is transmitted to the control circuit. When the temperature value detected by the temperature sensor is lower than or equal to the preset temperature value, the control circuit sends a control signal to enable the heating device to be powered on, air flowing through the hot air supply channel is continuously heated, air in the heating channel of the infusion tube has high enough temperature, and the infusion tube and liquid in the infusion tube can be heated and heated. When the temperature value detected by the temperature sensor is higher than the preset temperature value, the control circuit sends a control signal to power off the heating device, so that the air flowing through the hot air supply channel is not heated any more, and the temperature of the infusion tube and the liquid in the infusion tube can be reduced by the air flowing through the heating channel of the infusion tube. Thus, the infusion heating device can keep the infused liquid at a proper temperature all the time in the infusion process. Generally, the comfortable infusion temperature of a human body is about 28-37 ℃, and the liquid is slightly cooled during the delivery in consideration of different delivery distances from the placement position of an infusion heating device to an infusion needle, so that the preset temperature value with the long distance can be set between 32-37 ℃ (for example, 35 ℃); the preset temperature value, which is short in distance, is set between 28 and 34 ℃ (for example 31 ℃). Preferably, the control circuit can adjust the heating power of the heating device according to the temperature value detected by the temperature sensor, such as: the heating power is increased when the detected temperature value is lower, and the heating power is decreased when the detected temperature value is higher.
The temperature sensor can also detect the air temperature in the heating channel of the infusion tube and transmit the temperature value to the control circuit; when the temperature value detected by the temperature sensor is lower than the preset temperature value, the control circuit sends a control signal to enable the heating device to be powered on or to increase the heating power (when the temperature value detected by the temperature sensor is equal to the preset temperature value, the heating power can be kept unchanged), air flowing through the hot air supply channel is heated, and the temperature of the air in the heating channel of the infusion tube is increased or is increased quickly; when the temperature value detected by the temperature sensor is higher than the preset temperature value, the control circuit sends a control signal to enable the heating device to be powered off or the heating power to be reduced, and the air flowing through the hot air supply channel is not heated or the heating intensity is not reduced. The air temperature in the heating channel of the infusion tube is kept near a preset temperature value by on-off control and/or power regulation of the heating device; the air temperature inside the heating channel of the infusion tube can indirectly influence the liquid temperature inside the heated infusion tube, and the air temperature inside the heating channel of the infusion tube is usually slightly higher than the liquid temperature inside the heated infusion tube in practical use, and in this case, the preset temperature value can be set between 35 ℃ and 41 ℃ (for example 38 ℃).
In the heating channel of the infusion tube, the air flow direction can be the same as the flow direction of the liquid in the infusion tube or opposite to the flow direction of the liquid in the infusion tube.
In the preferred scheme, the infusion tube heating channel is formed by enclosing a strip-shaped groove arranged on the surface of the shell and two elastic sealing strips arranged on two sides of the top opening of the strip-shaped groove, the outer side edges of the two elastic sealing strips are respectively connected with the tops of two side walls of the strip-shaped groove, and the inner side edges of the two elastic sealing strips are in mutual contact. The strip-shaped groove can be linear or curved (e.g., U-shaped). The elastic sealing strip can be made of rubber or thermoplastic elastomer. When the infusion tube is arranged in the heating channel of the infusion tube, a section of the infusion tube can be arranged at the junction of the inner side edges of the two elastic sealing strips along the extending direction of the strip-shaped groove, then the section of the infusion tube is pressed into the strip-shaped groove (the two elastic sealing strips are elastically deformed in the pressing process), then the two elastic sealing strips rebound, and the inner side edges of the two elastic sealing strips recover to the state of mutual contact; when the infusion tube needs to be taken out, the infusion tube is pulled out from the junction of the inner side edges of the two elastic sealing strips. The structure enables the transfusion heating device and the transfusion tube to be conveniently and quickly assembled and disassembled.
In a more preferable scheme, two ends of the strip-shaped groove are respectively provided with an end opening, two ends of the elastic sealing strip are respectively provided with an end opening sealing part, the inner side edge of each end opening sealing part is respectively provided with a semicircular notch, and the semicircular notches on the end opening sealing parts at the same end of the two elastic sealing strips are corresponding in position. When the infusion tube is arranged in the strip-shaped groove, the infusion tube is positioned in a round hole formed by the semi-circular notches on the sealing parts of the end openings at the same ends of the two elastic sealing strips at the two ends of the strip-shaped groove, and the round hole plays a role in positioning the infusion tube. Generally, the radius of the semicircular gap is approximately equal to that of the infusion tube, and the tube wall of the infusion tube can be tightly contacted with the inner wall of the semicircular gap after the infusion tube is arranged in the infusion tube, so that good sealing is realized, and air leakage is reduced.
The bottoms of the two ends of the strip-shaped groove can be respectively provided with a vent hole, and the two vent holes respectively form an air inlet end and an air outlet end of the heating channel of the infusion tube.
In a more preferable scheme, two infusion tube supports are arranged on the shell, the two infusion tube supports correspond to the two ends of the strip-shaped groove respectively, and clamping grooves are formed in the infusion tube supports. When the infusion tube is arranged in the strip-shaped groove, the parts of the infusion tube extending out of the two ends of the strip-shaped groove are respectively embedded into the clamping grooves on the two infusion tube brackets, so that the infusion tube can be further prevented from being dislocated or separated from the infusion heating device in the infusion heating process. The infusion tube bracket can be made of plastic.
In a more preferred scheme, a plurality of convex blocks are arranged at the bottom of the strip-shaped groove, when the infusion tube is installed in the strip-shaped groove, after the infusion tube contacts the convex blocks, the convex blocks can support and limit the infusion tube, so that a certain distance is kept between the infusion tube and the bottom of the strip-shaped groove, and the infusion tube can exchange heat with air flow more fully.
In a preferable scheme, the air outlet end of the infusion tube heating channel is communicated with the air inlet end of the hot air supply channel. In this case, the hot air supply channel and the liquid transport tube heating channel constitute an annular gas channel in which air circulates under the drive of a fan. After the hot air in the heating channel of the infusion tube heats the infusion tube and the liquid in the infusion tube, the temperature of the air sent out from the air outlet end of the heating channel of the infusion tube is reduced, and the air is heated by the heating device after entering the hot air supply channel and then enters the heating channel of the infusion tube again. Since the temperature of the air delivered from the outlet end of the heating channel of the infusion tube is generally higher than the temperature of the outside air, recycling of this air is advantageous in reducing energy consumption.
In the case where the hot air supply passage and the liquid transport tube heating passage constitute an annular gas passage, temperature control can be performed in one of two ways:
(1) the temperature sensor can detect the wall temperature of the infusion tube between the heating channel of the infusion tube and the infusion needle (the wall temperature can reflect the temperature of liquid in the infusion tube), and transmit the temperature value to the control circuit; when the temperature value detected by the temperature sensor is lower than or equal to the preset temperature value, the control circuit sends a control signal to enable the heating device to be powered on, air flowing through the hot air supply channel is continuously heated, so that the air in the heating channel of the infusion tube has high enough temperature, and the infusion tube and liquid in the infusion tube can be heated and heated; when the temperature value detected by the temperature sensor is higher than the preset temperature value, the control circuit sends a control signal to enable the heating device to be powered off, the air flowing through the hot air supply channel is not heated any more, the temperature of the air flowing through the heating channel of the infusion tube is reduced to some extent, and the temperature of the infusion tube and the liquid in the infusion tube can be reduced. Preferably, the control circuit can adjust the heating power of the heating device according to the temperature value detected by the temperature sensor, such as: the heating power is increased when the detected temperature value is lower, and the heating power is decreased when the detected temperature value is higher. Generally, the comfortable infusion temperature of a human body is about 28-37 ℃, and the liquid is slightly cooled during the delivery in consideration of different delivery distances from the placement position of an infusion heating device to an infusion needle, so that the preset temperature value with the long distance can be set between 32-37 ℃ (for example, 35 ℃); the preset temperature value, which is short in distance, is set between 28 and 34 ℃ (for example 31 ℃).
Or (2) the temperature sensor detects the air temperature in the heating channel of the infusion tube and transmits the temperature value to the control circuit; when the temperature value detected by the temperature sensor is lower than the preset temperature value, the control circuit sends a control signal to enable the heating device to be powered on or to increase the heating power (when the temperature value detected by the temperature sensor is equal to the preset temperature value, the heating power can be kept unchanged), air flowing through the hot air supply channel is heated, and the temperature of the air in the heating channel of the infusion tube is increased or is increased quickly; when the temperature value detected by the temperature sensor is higher than the preset temperature value, the control circuit sends a control signal to enable the heating device to be powered off or the heating power to be reduced, and the air flowing through the hot air supply channel is not heated or the heating intensity is not reduced. The air temperature in the heating channel of the infusion tube is kept near a preset temperature value by on-off control and/or power regulation of the heating device; the air temperature in the heating channel of the infusion tube can indirectly reflect the liquid temperature in the heated infusion tube, and the air temperature in the heating channel of the infusion tube is usually slightly higher than the liquid temperature in the heated infusion tube in actual use, and in this case, the preset temperature value can be set between 35 ℃ and 41 ℃ (for example 38 ℃).
In a more preferable scheme, the hot air supply channel is provided with an air inlet and an air outlet, the air inlet, the fan, the infusion tube heating channel and the air outlet are sequentially arranged along the air flow direction, and the hot air supply channel is provided with an air flow direction switching mechanism for switching the air flow direction in the hot air supply channel; the air flow direction switching mechanism can switch the air flow direction in the hot air supply passage between two states: in the first state, the air inlet and the air outlet are closed, the hot air supply channel is conducted (air can circularly flow in an annular gas channel consisting of the infusion tube heating channel and the hot air supply channel); in the second state, both the air inlet and the air outlet are open, and the hot air supply passage is partially blocked between the air inlet and the air outlet (ambient air enters the air inlet-side hot air supply passage from the air inlet, flows through the infusion tube heating passage, and is then discharged through the air outlet-side hot air supply passage and the air outlet). When the device is used, before the fan and the heating device are started, the air flow direction can be in a second state, and at the moment, outside air enters the hot air supply channel and the infusion tube heating channel through the air inlet and the air outlet, so that the hot air supply channel and the infusion tube heating channel are filled with air; then starting the fan and the heating device, and switching the air flow direction to a first state, wherein the fan drives the air to circularly flow in the annular gas channel, the air is heated by the heating device to heat hot air when flowing through the hot air supply channel, and the hot air heats the infusion tube and liquid in the infusion tube when flowing through the heating channel of the infusion tube and heats the infusion tube. When the temperature value detected by the temperature sensor is higher than the preset temperature value, the control circuit sends a control signal to cut off the power of the heating device, and simultaneously, the air flow direction is switched to a second state, at the moment, the external cold air enters the air inlet side heat air supply channel from the air inlet, flows through the infusion tube heating channel and cools the infusion tube and the liquid in the infusion tube, and is discharged through the air outlet side heat air supply channel and the air outlet.
In a further preferred scheme, the air flow direction switching mechanism comprises a driving motor, an air inlet baffle, an air outlet baffle and a baffle rotating shaft, wherein the air inlet and the air outlet are arranged on the side wall of the hot air supply channel and are arranged side by side from front to back, the baffle rotating shaft is rotatably arranged on the shell and is positioned between the air inlet and the air outlet, the driving motor is arranged on the shell, a power output shaft of the driving motor is in transmission connection with the baffle rotating shaft, and the driving motor is electrically connected with the corresponding output end of the control circuit. The air flow direction switching mechanism switches between: in the first state, the air inlet baffle and the air outlet baffle respectively seal the air inlet and the air outlet, and the hot air supply channel is communicated; in the second state, the driving motor drives the baffle rotating shaft to rotate for a certain angle (such as 90 degrees) under the control of the control circuit, so that the air inlet baffle leaves the air inlet, the air outlet baffle leaves the air outlet, and the air inlet baffle or the air outlet baffle enters the hot air supply channel to separate the part of the hot air supply channel between the air inlet and the air outlet.
In another further preferred embodiment, the air flow direction switching mechanism includes a two-position four-way solenoid valve, and the two-position four-way solenoid valve is electrically connected to the corresponding output terminal of the control circuit; the hot air supply channel is disconnected at the position of the two-position four-way electromagnetic valve, the disconnected position forms the air inlet and the air outlet, the air inlet and the air outlet are respectively communicated with corresponding channel openings on the valve body of the two-position four-way electromagnetic valve, and the rest two channel openings on the valve body of the two-position four-way electromagnetic valve are communicated with the outside. The air flow direction switching mechanism switches between: in the first state, the air inlet and the air outlet are communicated through the valve core of the two-position four-way electromagnetic valve, and the hot air supply channel is communicated; in the second state, the two-position four-way electromagnetic valve switches the valve core position under the control of the control circuit, and the valve core of the two-position four-way electromagnetic valve communicates the air inlet with the outside (can introduce outside air) and communicates the air outlet with the outside (can discharge the air flowing through the heating channel of the infusion tube to the outside).
In the case where the hot air supply passage and the liquid transport tube heating passage constitute an annular gas passage, the installation position of the blower may be one of the following three ways.
In a first scheme, the hot air supply channel comprises a first hot air supply channel section and a second hot air supply channel section, the air outlet end of the infusion tube heating channel is communicated with the air inlet end of the first hot air supply channel section, the air outlet end of the first hot air supply channel section is communicated with the air inlet of the fan, the air outlet of the fan is communicated with the air inlet end of the second hot air supply channel section, and the air outlet end of the second hot air supply channel section is communicated with the air inlet end of the infusion tube heating channel; the air inlet and the air outlet are arranged on the first hot air supply channel section; the heating device is arranged in the first hot air supply channel section or the second hot air supply channel section. In this case, the cavity of the fan serves as a part of the hot air supply passage. Preferably, the heating device is arranged in the first hot air supply channel section, so that when the infusion tube needs to be cooled, even if the heating device cannot be powered off due to faults, the cooler air can still be introduced into the heating channel of the infusion tube.
In the second scheme, the air outlet end of the hot air supply channel is communicated with the air inlet of the fan, the air outlet of the fan is communicated with the air inlet end of the infusion tube heating channel, and the air outlet end of the infusion tube heating channel is communicated with the air inlet end of the hot air supply channel. In this case, the air outlet end of the hot air supply channel is communicated with the air inlet end of the infusion tube heating channel through the cavity of the fan.
In the third scheme, the air outlet end of the infusion tube heating channel is communicated with the air inlet of the fan, the air outlet of the fan is communicated with the air inlet end of the hot air supply channel, and the air outlet end of the hot air supply channel is communicated with the air inlet end of the infusion tube heating channel. In this case, the air outlet end of the heating channel of the infusion tube is communicated with the air inlet end of the hot air supply channel through the cavity of the fan.
The utility model discloses utilize the heat exchange between hot-air and the transfer line, liquid to transfer line and its inside is comparatively even, heat fast and make it heat up to avoid the high temperature through temperature detection and control (can make transfer line and its inside liquid cooling comparatively fast when detecting the high temperature), thereby make the internal liquid of infusion in-process input patient keep suitable temperature, effectively avoid the patient to feel uncomfortable in the infusion in-process, ensure infusion treatment and infusion security.
Drawings
Fig. 1 is a schematic view of the structure and the working principle of the preferred embodiment 1 of the present invention (the circulation heating state);
fig. 2 is a schematic view of the structure and the operation principle of the preferred embodiment 1 of the present invention (cooling state);
FIG. 3 is a schematic structural view of a preferred embodiment 1 of the present invention (in a state of being loaded into an infusion tube);
fig. 4 is a cross-sectional view a-a of the heating channel of the infusion tube of fig. 3;
fig. 5 is a schematic block circuit diagram of the preferred embodiment 1 of the present invention;
fig. 6 is a schematic structural view of a strip-shaped groove in the preferred embodiment 1 of the present invention;
fig. 7 is a schematic structural view of a preferred embodiment 2 of the present invention;
fig. 8 is a schematic view of the pipe connection according to the preferred embodiment 3 of the present invention.
Detailed Description
Example 1
As shown in fig. 1-5, the infusion heating device includes a housing 1, a heating device 2, a blower 3, a temperature sensor 4 and a control circuit 5, wherein the housing 1 is provided with a hot air supply channel 6 and an infusion tube heating channel 7, an air outlet end of the hot air supply channel 6 is communicated with an air inlet end of the infusion tube heating channel 7, an air outlet end of the infusion tube heating channel 7 is communicated with an air inlet end of the hot air supply channel 6, the blower 3 is installed on the hot air supply channel 6, the heating device 2 is arranged in the hot air supply channel 6, the temperature sensor 4 is electrically connected with a corresponding input end of the control circuit 5, and the heating device 2 is electrically connected with a corresponding output end of the control circuit 5.
In this embodiment, the hot air supply channel 6 is provided with an air inlet 63 and an air outlet 64, the air inlet 63, the blower 3, the infusion tube heating channel 7, and the air outlet 64 are sequentially arranged along the air flow direction, and the hot air supply channel 6 is provided with an air flow direction switching mechanism for switching the air flow direction in the hot air supply channel; the air flow direction switching mechanism can switch the air flow direction in the hot air supply passage between two states: in the first state, both the air inlet 63 and the air outlet 64 are closed, and the hot air supply passage 6 is open; in the second state, both the air inlet 63 and the air outlet 64 are open, and the hot air supply passage 6 is partially blocked between the air inlet 63 and the air outlet 64.
The air flow direction switching mechanism of the embodiment includes a driving motor 81, an air inlet baffle 82, an air outlet baffle 83 and a baffle rotating shaft 84, the air inlet 63 and the air outlet 64 are arranged on the side wall of the hot air supply channel 6 and are arranged side by side in front and back, the baffle rotating shaft 84 is rotatably installed on the housing 1 and is positioned between the air inlet 63 and the air outlet 64, the driving motor 81 is installed on the housing 1, a power output shaft of the driving motor 81 is in transmission connection with the baffle rotating shaft 84, and the driving motor 81 is electrically connected with the corresponding output end of the control circuit 5. The air flow direction switching mechanism switches between: referring to fig. 1, in a first state, the air inlet 63 and the air outlet 64 are respectively sealed by the air inlet baffle 82 and the air outlet baffle 83, and the hot air supply channel 6 is conducted (air can circularly flow in the annular gas channel consisting of the infusion tube heating channel 7 and the hot air supply channel 6); referring to fig. 2, in the second state, the driving motor 81 under the control of the control circuit 5 drives the baffle rotating shaft 84 to rotate a certain angle (e.g. 90 degrees) so that the air inlet baffle 82 leaves the air inlet 63 and the air outlet baffle 83 leaves the air outlet 64, and the air inlet baffle 82 (or the air outlet baffle 83) enters the hot air supply passage 6 to block a portion of the hot air supply passage 6 between the air inlet 63 and the air outlet 64.
In this embodiment, the hot air supply channel 6 includes a first hot air supply channel section 61 and a second hot air supply channel section 62, the air outlet end of the infusion tube heating channel 7 is communicated with the air inlet end of the first hot air supply channel section 61, the air outlet end of the first hot air supply channel section 61 is communicated with the air inlet 31 of the blower 3, the air outlet 32 of the blower 3 is communicated with the air inlet end of the second hot air supply channel section 62, and the air outlet end of the second hot air supply channel section 62 is communicated with the air inlet end of the infusion tube heating channel 7; the air inlet 63 and the air outlet 64 are provided on the first hot air supply passage section 61; the heating device 2 is provided in the first hot air supply passage section 61 (the heating device 2 in this embodiment employs a heating wire as a heat generating component, the heating wire being in the first hot air supply passage section 61). The cavity of the fan 3 serves as a part of the hot air supply passage 6. When the air flow direction switching mechanism is switched to the second state, the outside air enters the air inlet side hot air supply passage (the portion of the first hot air supply passage section 61 close to the blower 3, the air inlet 31 of the blower 3, the cavity of the blower 3, the air outlet 32 of the blower 3, and the second hot air supply passage section 62 in this order) from the air inlet 63, passes through the infusion tube heating passage 7, and is then discharged through the air outlet side hot air supply passage (i.e., the first hot air supply passage section 61) and the air outlet 64. Since the heating device 2 is arranged in the first hot air supply channel section 61, in the second state, even if the heating device 2 fails to be switched off due to a malfunction, it is ensured that relatively cold air is introduced into the heating channel 7 of the infusion tube.
In this embodiment, the fan 3 is electrically connected to the corresponding output terminal of the control circuit 5. The fan can also be directly connected with a power supply.
In this embodiment, the temperature sensor 4 may be mounted in the housing or on the surface of the housing 1 (e.g., may be provided at the bottom of a card slot 12).
In this embodiment, the infusion heating device further comprises a display screen 9, the display screen 9 is installed on the surface of the shell 1, the display screen 9 is electrically connected with the corresponding output end of the control circuit 5, and the display screen 9 can display the temperature value detected by the temperature sensor 4.
The control circuit 5 can adopt a singlechip or a CPU.
Referring to fig. 3, 4 and 6, the infusion tube heating channel 7 is enclosed by a strip-shaped groove 71 formed on the surface of the housing 1 and two elastic sealing strips 72 formed on two sides of the top opening of the strip-shaped groove 71, the outer side edges of the two elastic sealing strips 72 are respectively connected with the tops of two side walls of the strip-shaped groove 71, and the inner side edges of the two elastic sealing strips 71 are in contact with each other. In this embodiment, the bar-shaped groove 71 has a curved shape (e.g., a U-shape). The elastic sealing strip 72 may be made of rubber or a thermoplastic elastomer. Two ends of the strip-shaped groove 71 are respectively provided with an end opening 73, two ends of the elastic sealing strip 72 are respectively provided with an end opening sealing part 74, the inner side edge of each end opening sealing part 74 is respectively provided with a semicircular notch 75, and the positions of the semicircular notches 75 on the end opening sealing parts 74 at the same end of the two elastic sealing strips 72 are corresponding. When the infusion tube 10 is placed in the infusion tube heating channel 7, a section of the infusion tube can be placed at the junction 76 of the inner side edges of the two elastic sealing strips 72 along the extending direction of the strip-shaped groove 71, then the section of the infusion tube is pressed into the strip-shaped groove 71 (the two elastic sealing strips 72 are elastically deformed in the pressing process), then the two elastic sealing strips 72 rebound, and the inner side edges of the two elastic sealing strips 72 recover to the mutually contacted state; when the infusion tube 10 needs to be taken out, the infusion tube 10 is pulled out from the junction 76 of the inner side edges of the two elastic sealing strips 72. When the infusion tube 10 is loaded into the strip-shaped groove 71, at two ends of the strip-shaped groove 71, the infusion tube 10 is positioned in a circular hole surrounded by semicircular notches 75 on end opening sealing parts 74 at the same end of the two elastic sealing strips 72, and the circular hole plays a role in positioning the infusion tube 10. The radius of the semicircular notch 75 is approximately equal to the radius of the infusion tube 10, and the tube wall of the infusion tube can be tightly contacted with the inner wall of the semicircular notch 75 after the infusion tube 10 is arranged, so that good sealing is realized, and air leakage is prevented. The bottoms of the two ends of the strip-shaped groove 71 are respectively provided with a vent hole 77, and the two vent holes 77 respectively form an air inlet end and an air outlet end of the infusion tube heating channel 7.
Referring to fig. 3 and 6, two infusion tube brackets 11 are arranged on the housing 1, the two infusion tube brackets 11 respectively correspond to two ends of the strip-shaped groove 71, and a clamping groove 12 is arranged on the infusion tube brackets 11. When the infusion tube 10 is placed in the strip-shaped groove 71, the parts of the infusion tube 10 extending out of the two ends of the strip-shaped groove 71 are respectively embedded into the clamping grooves 12 on the two infusion tube brackets 11. The infusion tube support 11 may be made of plastic.
Referring to fig. 6, a plurality of protrusions 78 may be disposed at the bottom of the strip-shaped groove 71, and when the infusion tube 10 is installed in the strip-shaped groove 71, after the infusion tube 10 contacts the protrusions 78, the protrusions 78 may support and limit the infusion tube 10, so that a certain distance is maintained between the infusion tube 10 and the bottom of the strip-shaped groove 71.
The working principle of the infusion heating device of the embodiment is briefly described as follows:
when the device is used, a section of the infusion tube 10 is placed in the infusion tube heating channel 7, before the fan 3 and the heating device 2 are started, the air flow direction is in the second state, at the moment, outside air enters the hot air supply channel 6 and the infusion tube heating channel 7 through the air inlet 63 and the air outlet 64, and the hot air supply channel 6 and the infusion tube heating channel 7 are filled with air; then the blower 3 and the heating device 2 are started, the air flow direction switching mechanism switches the air flow direction to the first state, the blower 3 drives the air to circularly flow in the annular gas channel, the air is heated and heated by the heating device 2 when flowing through the hot air supply channel 6 to form hot air, and the hot air heats the infusion tube 10 and the liquid in the infusion tube 10 and heats the liquid when flowing through the infusion tube heating channel 7. The temperature sensor 4 detects the temperature of the tube wall of the infusion tube 10 between the infusion tube heating channel 7 and the infusion needle, and transmits the temperature value to the control circuit 5. When the temperature detected by the temperature sensor 4 is lower than or equal to the preset temperature value, the control circuit 5 sends a control signal to keep the heating device 2 powered on, so as to continuously heat the air flowing through the hot air supply channel 6, so that the air in the infusion tube heating channel 7 has a sufficiently high temperature, and the infusion tube 10 and the liquid in the infusion tube can be heated and heated. When the temperature value detected by the temperature sensor 4 is higher than the preset temperature value, the control circuit 5 sends a control signal to power off the heating device 2, and at the same time, the air flow direction switching mechanism switches the air flow direction to the second state, at the moment, the external cooler air enters the air inlet side heat air supply channel from the air inlet 63, flows through the infusion tube heating channel 7, cools the infusion tube 10 and the liquid in the infusion tube 10, and is discharged through the air outlet side heat air supply channel and the air outlet 64, and the external cooler air can continuously enter the infusion tube heating channel 7 in the state and continuously cools the infusion tube 10 and the liquid in the infusion tube 10.
According to different conveying distances from the placement position of the transfusion heating device to the transfusion needle head, the preset temperature value is set between 32 ℃ and 37 ℃ (for example, 35 ℃) under the condition of long distance; the temperature preset value is set between 28-34 c (e.g. 31 c) in case of short distance. In addition, the control circuit can adjust the heating power of the heating device according to the temperature value detected by the temperature sensor, such as: the heating power is increased when the detected temperature value is lower, and the heating power is decreased when the detected temperature value is higher.
In other embodiments, the installation position of the fan can also adopt the following modes: the air outlet end of the hot air supply channel is communicated with the air inlet of the fan, the air outlet of the fan is communicated with the air inlet end of the infusion tube heating channel, and the air outlet end of the infusion tube heating channel is communicated with the air inlet end of the hot air supply channel. In this case, the air outlet end of the hot air supply channel is communicated with the air inlet end of the infusion tube heating channel through the cavity of the fan.
In other embodiments, the installation position of the fan can also adopt the following modes: the air outlet end of the infusion tube heating channel is communicated with the air inlet of the fan, the air outlet of the fan is communicated with the air inlet end of the hot air supply channel, and the air outlet end of the hot air supply channel is communicated with the air inlet end of the infusion tube heating channel. In this case, the air outlet end of the heating channel of the infusion tube is communicated with the air inlet end of the hot air supply channel through the cavity of the fan.
Example 2
As shown in fig. 7, the main difference between this embodiment and embodiment 1 is: the air outlet end of the infusion tube heating channel 7 is not communicated with the air inlet end of the hot air supply channel 6. An air inlet 31 of the fan 3 is communicated with the outside, an air outlet 32 of the fan 3 is communicated with an air inlet end of the hot air supply channel 6, an air outlet end of the hot air supply channel 6 is communicated with an air inlet end of the infusion tube heating channel 7, and an air outlet end of the infusion tube heating channel 7 is communicated with the outside.
The rest of the structure of this embodiment can be referred to embodiment 1.
When the infusion heating device of the embodiment is used, a section of infusion tube 10 is arranged in the infusion tube heating channel 7; after the power is switched on, under the driving of the fan 3, air enters the hot air supply channel 6 from the air inlet end of the hot air supply channel 6 and flows through the hot air supply channel 6 and the infusion tube heating channel 7 in sequence, the air is heated by the heating device 2 to be heated when flowing through the hot air supply channel 6 to form hot air, the hot air heats the infusion tube 10 and liquid in the infusion tube 10 and heats the liquid when flowing through the infusion tube heating channel 7, and then the hot air is discharged from the air outlet end of the infusion tube heating channel 7. The temperature sensor 4 detects the temperature of the tube wall of the infusion tube 10 between the heating channel 7 and the infusion needle (the detection point of the temperature sensor is close to the heating channel of the infusion tube; the temperature of the tube wall can reflect the temperature of the liquid in the infusion tube), and transmits the temperature value to the control circuit 5. When the temperature detected by the temperature sensor 4 is lower than or equal to the preset temperature value, the control circuit 5 sends a control signal to keep the heating device 2 powered on, so as to continuously heat the air flowing through the hot air supply channel 6, so that the air in the infusion tube heating channel 7 has a sufficiently high temperature, and the infusion tube 10 and the liquid in the infusion tube can be heated and heated. When the temperature detected by the temperature sensor 4 is higher than the preset temperature value, the control circuit 5 sends a control signal to turn off the heating device 2, so that the air flowing through the hot air supply channel 6 is not heated any more, in this case, the air flowing through the infusion tube heating channel 7 can lower the temperature of the infusion tube 10 and the liquid inside the infusion tube.
Generally, the comfortable infusion temperature of a human body is about 28-37 ℃, and the liquid is slightly cooled during the delivery in consideration of different delivery distances from the placement position of an infusion heating device to an infusion needle, so that the preset temperature value with the long distance can be set between 32-37 ℃ (for example, 35 ℃); the preset temperature value, which is short in distance, is set between 28 and 34 ℃ (for example 31 ℃). Preferably, the control circuit can adjust the heating power of the heating device according to the temperature value detected by the temperature sensor, such as: the heating power is increased when the detected temperature value is lower, and the heating power is decreased when the detected temperature value is higher.
Example 3
Referring to fig. 8, the present embodiment is different from embodiment 1 in the structure of the air flow direction switching mechanism. In this embodiment, the air flow direction switching mechanism includes a two-position four-way solenoid valve 8, and the two-position four-way solenoid valve 8 is electrically connected to the corresponding output end of the control circuit; the hot air supply channel 6 is disconnected at the two-position four-way solenoid valve 8 (the hot air supply channel 6 comprises a first hot air supply channel section 61 and a second hot air supply channel section 62, wherein the first hot air supply channel section 61 is disconnected at the two-position four-way solenoid valve 8, namely the two-position four-way solenoid valve 8 is connected on the first hot air supply channel section 61; the air outlet end of the infusion tube heating channel 7 is communicated with the air inlet end of the first hot air supply channel section 61; the air outlet end of the first hot air supply channel section 61 is communicated with the air inlet 31 of the fan 3; the air outlet 32 of the fan 3 is communicated with the air inlet end of the second hot air supply channel section 62; the air outlet end of the second hot air supply channel section 62 is communicated with the air inlet end of the infusion tube heating channel 7), the disconnection of the first hot air supply channel section 61 forms an air inlet 63 and an air outlet 64, the air inlet 63 and the air outlet 64 are respectively communicated with corresponding channel ports on the valve body of the two-position four-way solenoid valve 8, the other two access ports on the valve body of the two-position four-way electromagnetic valve 8 are communicated with the outside. The air flow direction switching mechanism switches between: in the first state (the state shown in fig. 8), the air inlet 63 and the air outlet 64 are communicated through the spool of the two-position four-way solenoid valve 8, and the hot air supply passage 6 is communicated; in the second state, the two-position four-way solenoid valve 8 switches the valve core position under the control of the control circuit, and the valve core of the two-position four-way solenoid valve 8 communicates the air inlet 63 with the outside (can introduce the outside air) and communicates the air outlet 64 with the outside (can discharge the air flowing through the heating channel of the infusion tube to the outside).
The rest of the structure of this embodiment can be referred to embodiment 1.
Claims (10)
1. The utility model provides an infusion heating device, its characterized in that includes the shell, heating device, the fan, temperature sensor and control circuit, be equipped with hot-air supply passageway and transfer line heating channel on the shell, the end of giving vent to anger of hot-air supply passageway communicates with the inlet end of transfer line heating channel, the fan is installed on hot-air supply passageway, heating device locates in the hot-air supply passageway, temperature sensor is connected with the corresponding input electricity of control circuit, heating device is connected with the corresponding output electricity of control circuit.
2. The infusion heating device according to claim 1, characterized in that: the fan is electrically connected with the corresponding output end of the control circuit; the temperature sensor is arranged in the heating channel of the infusion tube, in the shell or on the surface of the shell.
3. The infusion heating device according to claim 1, characterized in that: the infusion heating device further comprises a display screen, the display screen is installed on the surface of the shell, and the display screen is electrically connected with the corresponding output end of the control circuit.
4. The infusion heating device according to claim 1, characterized in that: the infusion tube heating channel is formed by a strip-shaped groove formed in the surface of the shell and two elastic sealing strips arranged on two sides of the top opening of the strip-shaped groove in a surrounding mode, the outer side edges of the two elastic sealing strips are respectively connected with the tops of two side walls of the strip-shaped groove, and the inner side edges of the two elastic sealing strips are in contact with each other.
5. The infusion heating device according to claim 4, wherein: the strip-shaped groove is linear or curved; the elastic sealing strip is made of rubber or thermoplastic elastomer.
6. The infusion heating device according to claim 4, wherein: two ends of the strip-shaped groove are respectively provided with an end opening, two ends of the elastic sealing strip are respectively provided with an end opening sealing part, the inner side edge of each end opening sealing part is respectively provided with a semicircular notch, and the semicircular notches on the end opening sealing parts at the same end of the two elastic sealing strips are corresponding in position;
two infusion tube supports are arranged on the shell, the two infusion tube supports correspond to the two ends of the strip-shaped groove respectively, and clamping grooves are formed in the infusion tube supports.
7. The infusion heating device according to any one of claims 1 to 6, wherein: the air outlet end of the infusion tube heating channel is communicated with the air inlet end of the hot air supply channel.
8. The infusion heating device according to claim 7, wherein: the hot air supply channel is provided with an air inlet and an air outlet, the air inlet, the fan, the infusion tube heating channel and the air outlet are sequentially arranged along the air flow direction, and the hot air supply channel is provided with an air flow direction switching mechanism for switching the air flow direction in the hot air supply channel;
the air flow direction switching mechanism can switch the air flow direction in the hot air supply passage between two states: in the first state, the air inlet and the air outlet are closed, the hot air supply channel is communicated, and air can circularly flow in an annular gas channel consisting of the infusion tube heating channel and the hot air supply channel; in the second state, the air inlet and the air outlet are both opened, the hot air supply channel is partially blocked between the air inlet and the air outlet, and outside air enters the air inlet side hot air supply channel from the air inlet, flows through the infusion tube heating channel and then is discharged through the air outlet side hot air supply channel and the air outlet.
9. The infusion heating device according to claim 8, wherein: the air flow direction switching mechanism comprises a driving motor, an air inlet baffle, an air outlet baffle and a baffle rotating shaft, the air inlet and the air outlet are arranged on the side wall of the hot air supply channel and are arranged side by side from front to back, the baffle rotating shaft is rotatably arranged on the shell and is positioned between the air inlet and the air outlet, the driving motor is arranged on the shell, a power output shaft of the driving motor is in transmission connection with the baffle rotating shaft, and the driving motor is electrically connected with the corresponding output end of the control circuit.
10. The infusion heating device according to claim 8, wherein: the air flow direction switching mechanism comprises a two-position four-way electromagnetic valve which is electrically connected with the corresponding output end of the control circuit; the hot air supply channel is disconnected at the position of the two-position four-way electromagnetic valve, the disconnected position forms the air inlet and the air outlet, the air inlet and the air outlet are respectively communicated with corresponding channel openings on the valve body of the two-position four-way electromagnetic valve, and the rest two channel openings on the valve body of the two-position four-way electromagnetic valve are communicated with the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121194884.0U CN214970426U (en) | 2021-05-31 | 2021-05-31 | Transfusion heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121194884.0U CN214970426U (en) | 2021-05-31 | 2021-05-31 | Transfusion heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214970426U true CN214970426U (en) | 2021-12-03 |
Family
ID=79088692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121194884.0U Active CN214970426U (en) | 2021-05-31 | 2021-05-31 | Transfusion heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214970426U (en) |
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2021
- 2021-05-31 CN CN202121194884.0U patent/CN214970426U/en active Active
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