Isolation power supply circuit applied to external defibrillator and external defibrillator

Abstract

The utility model relates to an isolated power supply circuit applied to an external defibrillator and the external defibrillator. The isolation power supply circuit applied to the external defibrillator comprises a first isolation power supply module and a second isolation power supply module, the first isolation power supply module is used for supplying power to a mutual feedback circuit of the external defibrillator, and the second isolation power supply module is used for supplying power to an energy storage circuit of the external defibrillator; the load balancing sub-module of the first isolation power supply module comprises a voltage conversion chip which is used for converting a first voltage output by a power supply into a second voltage. And the first isolation power supply sub-module, the second isolation power supply sub-module, the third isolation power supply sub-module, the fourth isolation power supply sub-module, the fifth isolation power supply sub-module, the sixth isolation power supply sub-module, the seventh isolation power supply sub-module and the eighth isolation power supply sub-module are respectively driven by the second voltage. The isolated power supply circuit applied to the external defibrillator can improve the use safety of the external defibrillator.

Description

Technical Field

[0001] The utility model relates to the technical field of external defibrillators, in particular to an isolated power supply circuit applied to an external defibrillator and an external defibrillator. Background Technique

[0002] An external defibrillator is a portable medical device that can diagnose specific arrhythmias and give an electric shock defibrillation. It is a medical device that can be used by non-professionals to rescue patients with cardiac arrest.

[0003] In the related art, an external defibrillator physically isolates the input circuit and the output circuit through an isolated power supply to reduce the safety risk caused by the output circuit to the user. However, the design of the isolated power supply circuit in the external defibrillator is relatively simple. When a local failure occurs in the isolated power supply circuit, the function of the entire isolated power supply circuit will be affected, resulting in potential safety hazards during the use of the external defibrillator. Content of the Utility Model

[0004] Based on this, it is necessary to provide an isolated power supply circuit applied to an external defibrillator and an external defibrillator to address the problem of potential safety hazards during the use of external defibrillators.

[0005] An isolated power supply circuit applied to an external defibrillator, the external defibrillator further includes a mutual feeding circuit and an energy storage circuit. The isolated power supply circuit includes a first isolated power supply module and a second isolated power supply module connected in parallel with each other. The first isolated power supply module and the second isolated power supply module are respectively connected to an external power supply, and the first isolated power supply module is used to supply power to the mutual feeding circuit of the external defibrillator, and the second isolated power supply module is used to supply power to the energy storage circuit of the external defibrillator;

[0006] The first isolated power supply module includes a load balancing sub-module, and a first isolated power supply sub-module, a second isolated power supply sub-module, a third isolated power supply sub-module, a fourth isolated power supply sub-module, a fifth isolated power supply sub-module, a sixth isolated power supply sub-module, a seventh isolated power supply sub-module, and an eighth isolated power supply sub-module that are connected in parallel and respectively connected to the load balancing sub-module;

[0007] The load balancing sub-module includes a voltage conversion chip. The voltage conversion chip is used to convert the first voltage output by the external power supply into a second voltage, and drive the first isolated power supply sub-module, the second isolated power supply sub-module, the third isolated power supply sub-module, the fourth isolated power supply sub-module, the fifth isolated power supply sub-module, the sixth isolated power supply sub-module, the seventh isolated power supply sub-module, and the eighth isolated power supply sub-module through the second voltage. The voltage conversion chip includes a ME2199 boost controller.

[0008] The isolation power supply circuit applied to the external defibrillator includes a first isolation power supply module and a second isolation power supply module connected in parallel with each other. The first isolation power supply module and the second isolation power supply module are respectively connected to an external power supply. The first isolation power supply module is used to supply power to the mutual feed circuit of the external defibrillator, and the second isolation power supply module is used to supply power to the energy storage circuit of the external defibrillator. The first isolation power supply module includes a load balancing sub-module, and a first isolation power supply sub-module, a second isolation power supply sub-module, a third isolation power supply sub-module, a fourth isolation power supply sub-module, a fifth isolation power supply sub-module, a sixth isolation power supply sub-module, a seventh isolation power supply sub-module, and an eighth isolation power supply sub-module that are connected in parallel and respectively connected to the load balancing sub-module. The load balancing sub-module includes a voltage conversion chip, which is used to convert the first voltage output by the external power supply into a second voltage, and drive the first isolation power supply sub-module, the second isolation power supply sub-module, the third isolation power supply sub-module, the fourth isolation power supply sub-module, the fifth isolation power supply sub-module, the sixth isolation power supply sub-module, the seventh isolation power supply sub-module, and the eighth isolation power supply sub-module respectively through the second voltage. The voltage conversion chip includes an ME2199 boost controller. In view of the usage scenario and circuit characteristics of the external defibrillator, the present utility model respectively sets different isolation power supply modules for the mutual feed circuit and the energy storage circuit in the external defibrillator, and further sets eight isolation power supply sub-modules in the first isolation power supply module. This setting method can prevent the local failure of the isolation power supply from being conducted to the entire external defibrillator, improving the usage safety of the external defibrillator. Moreover, the multiple isolation power supply modules cooperate with each other, reducing the load of a single power supply module, which is beneficial to improving the overall stability of the external defibrillator.

[0009] In one embodiment, the first isolation power supply sub-module, the second isolation power supply sub-module, the third isolation power supply sub-module, the fourth isolation power supply sub-module, the fifth isolation power supply sub-module, the sixth isolation power supply sub-module, the seventh isolation power supply sub-module, and the eighth isolation power supply sub-module all include a first isolation transformer;

[0010] The first isolation transformer is used to electrically isolate the mutual feed circuit of the external defibrillator from the external power supply.

[0011] In one embodiment, the first isolation transformer includes a VPT87DDF01B type transformer.

[0012] In one embodiment, the first isolated power sub-module, the second isolated power sub-module, the third isolated power sub-module, the fourth isolated power sub-module, the fifth isolated power sub-module, the sixth isolated power sub-module, the seventh isolated power sub-module, and the eighth isolated power sub-module each include a first transformer driver electrically connected to the first isolation transformer, and the first transformer driver is configured to drive the first isolation transformer to operate.

[0013] In one embodiment, the first transformer driver includes a VPS8703 type driver.

[0014] In one embodiment, the second isolated power module includes a second isolation transformer;

[0015] The second isolation transformer is configured to electrically isolate the energy storage circuit of the external defibrillator from an external power source.

[0016] In one embodiment, the second isolation transformer includes a VPT87DDF01B type transformer.

[0017] In one embodiment, the second isolated power module further includes a second transformer driver;

[0018] The second transformer driver is configured to drive the second isolation transformer to operate.

[0019] In one embodiment, the second transformer driver includes a VPS8703 type driver.

[0020] An external defibrillator, the external defibrillator includes an energy storage circuit, a mutual feeding circuit, and the isolated power supply circuit applied to the external defibrillator as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the isolated power supply circuit of the present invention applied to an external defibrillator;

[0022] Figure 2 is a schematic structural diagram of the external defibrillator of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the above objects, features, and advantages of the present invention more apparent and understandable, the following detailed description of the specific embodiments of the present invention will be made with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only."

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] The utility model discloses an isolation power supply circuit applied to an external defibrillator and the external defibrillator.

[0027] like Figures 1 to 2 As shown, the external defibrillator also includes a mutual feeding circuit and an energy storage circuit. The electric shock waveform output by the external defibrillator is crucial to the treatment effect. The mutual feeding circuit of the external defibrillator can automatically adjust the electric shock waveform output by the external defibrillator, thereby improving the treatment effect. The external defibrillator's energy storage circuit includes a supercapacitor, and the electric shock effect can be achieved by controlling the discharge of the supercapacitor. For the mutual feeding circuit and energy storage circuit in the external defibrillator, different isolated power supply circuits are provided, which can significantly improve the user experience of the external defibrillator.

[0028] The isolated power supply circuit used in an external defibrillator includes a first isolated power supply module and a second isolated power supply module connected in parallel. The first isolated power supply module and the second isolated power supply module are respectively connected to an external power supply. The first isolated power supply module is used to power the mutual feedback circuit of the external defibrillator, and the second isolated power supply module is used to power the energy storage circuit of the external defibrillator.

[0029] The first isolated power supply module includes a load balancing submodule and a first isolated power supply submodule, a second isolated power supply submodule, a third isolated power supply submodule, a fourth isolated power supply submodule, a fifth isolated power supply submodule, a sixth isolated power supply submodule, a seventh isolated power supply submodule and an eighth isolated power supply submodule which are connected in parallel to each other and respectively connected to the load balancing submodule.

[0030] The load balancing sub-module includes a voltage conversion chip, which is used to convert the first voltage output by an external power supply into a second voltage, and drive the first isolated power supply sub-module, the second isolated power supply sub-module, the third isolated power supply sub-module, the fourth isolated power supply sub-module, the fifth isolated power supply sub-module, the sixth isolated power supply sub-module, the seventh isolated power supply sub-module, and the eighth isolated power supply sub-module respectively through the second voltage. The voltage conversion chip includes an ME2199 boost controller.

[0031] The ME2199 boost controller is a 1MHz boost DC-DC controller. Since it uses an external N-channel power MOSFET switch with a low on-resistance, it is suitable for application circuits that require high efficiency and high output current.

[0032] The above isolated power supply circuit applied to an external defibrillator includes a first isolated power supply module and a second isolated power supply module connected in parallel with each other. The first isolated power supply module and the second isolated power supply module are respectively connected to an external power supply. The first isolated power supply module is used to supply power to the mutual feed circuit of the external defibrillator, and the second isolated power supply module is used to supply power to the energy storage circuit of the external defibrillator; the first isolated power supply module includes a load balancing sub-module and a first isolated power supply sub-module, a second isolated power supply sub-module, a third isolated power supply sub-module, a fourth isolated power supply sub-module, a fifth isolated power supply sub-module, a sixth isolated power supply sub-module, a seventh isolated power supply sub-module, and an eighth isolated power supply sub-module that are connected in parallel with each other and are respectively connected to the load balancing sub-module; the load balancing sub-module includes a voltage conversion chip, which is used to convert the first voltage output by an external power supply into a second voltage, and drive the first isolated power supply sub-module, the second isolated power supply sub-module, the third isolated power supply sub-module, the fourth isolated power supply sub-module, the fifth isolated power supply sub-module, the sixth isolated power supply sub-module, the seventh isolated power supply sub-module, and the eighth isolated power supply sub-module respectively through the second voltage. The voltage conversion chip includes an ME2199 boost controller. In view of the usage scenario and circuit characteristics of the external defibrillator, the present utility model separately sets different isolated power supply modules for the mutual feed circuit and the energy storage circuit in the external defibrillator, and further sets eight isolated power supply sub-modules in the first isolated power supply module. This setting method can prevent the local failure of the isolated power supply from being conducted to the entire external defibrillator, improving the usage safety of the external defibrillator; moreover, multiple isolated power supply modules cooperate with each other, reducing the load of a single power supply module and avoiding the reduction of the service life caused by overheating of a single power supply module, which is beneficial to improving the overall stability of the external defibrillator.

[0033] Among them, the ways for the first isolated power sub-module, the second isolated power sub-module, the third isolated power sub-module, the fourth isolated power sub-module, the fifth isolated power sub-module, the sixth isolated power sub-module, the seventh isolated power sub-module, and the eighth isolated power sub-module to achieve electrical isolation include transformer isolation, pulse transformer isolation, relay isolation, optocoupler isolation, fiber isolation, etc. Preferably, the first isolated power sub-module, the second isolated power sub-module, the third isolated power sub-module, the fourth isolated power sub-module, the fifth isolated power sub-module, the sixth isolated power sub-module, the seventh isolated power sub-module, and the eighth isolated power sub-module all include a first isolation transformer. The first isolation transformer is used to electrically isolate the mutual feeding circuit of the external defibrillator from the external power supply.

[0034] Furthermore, the model of the first isolation transformer can be selected according to actual needs. Preferably, the first isolation transformer includes a VPT87DDF01B type transformer. The VPT87DDF01B type transformer is a small-volume isolation transformer with an isolation voltage of up to 3000VDC, a working temperature range of -40°C to 125°C, and a storage temperature range of -55°C to 125°C.

[0035] Among them, the first isolated power sub-module, the second isolated power sub-module, the third isolated power sub-module, the fourth isolated power sub-module, the fifth isolated power sub-module, the sixth isolated power sub-module, the seventh isolated power sub-module, and the eighth isolated power sub-module all include a first transformer driver electrically connected to the first isolation transformer. The first transformer driver is used to drive the first isolation transformer to work.

[0036] Furthermore, the model of the first transformer driver can be selected according to actual needs. Preferably, the model of the first transformer driver includes a VPS8703 type driver. The VPS8703 type driver is a DC-DC isolated switch-mode power supply integrated controller suitable for a full-bridge topology structure, supports an input voltage of 6V to 30V, has a wide voltage compatibility, and can adapt to different power requirements; when the current is too large, it can clamp and limit the current of the power transistor, which not only ensures the safe operation of the chip itself but also avoids the impact of large current on peripheral devices; the working frequency can be selected through the CLK pin. When the CLK pin is floating, it works at a low-frequency voltage; when it is grounded, it works at a high-frequency voltage. In addition, the CLK pin can also receive an external synchronous clock signal. At this time, the output frequency is half of the clock frequency, providing flexible frequency adjustment options. A dead time is designed between the two-way drives of the VPS8703 type driver, which avoids the occurrence of a common phenomenon, reduces the drain-source voltage when the power transistor is turned on, and reduces the switching loss.

[0037] Among them, the ways for the second isolated power supply module to achieve electrical isolation include transformer isolation, pulse transformer isolation, relay isolation, optocoupler isolation, fiber isolation, etc. Preferably, the second isolated power supply module includes a second isolation transformer. The second isolation transformer is used to electrically isolate the energy storage circuit of the external defibrillator from the external power supply.

[0038] Furthermore, the model of the second isolation transformer can be selected according to actual needs. Preferably, the second isolation transformer includes a VPT87DDF01B type transformer.

[0039] Among them, the second isolated power supply module further includes a second transformer driver. The second transformer driver is used to drive the second isolation transformer to work.

[0040] Furthermore, the model of the second transformer driver can be selected according to actual needs. Preferably, the second transformer driver includes a VPS8703 type driver.

[0041] The external defibrillator of the present utility model includes an energy storage circuit, a mutual feeding circuit, and the isolated power supply circuit applied to the external defibrillator as described above. By including the isolated power supply circuit as described above, the external defibrillator has higher usage safety and overall stability.

[0042] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0043] The above-described embodiments merely represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. An isolated power supply circuit applied to an external defibrillator, the external defibrillator further comprising a mutual feeding circuit and an energy storage circuit, characterized in that, The isolated power supply circuit includes a first isolated power supply module and a second isolated power supply module connected in parallel with each other. The first isolated power supply module and the second isolated power supply module are respectively connected to an external power supply. The first isolated power supply module is used to supply power to the mutual feedback circuit of the external defibrillator, and the second isolated power supply module is used to supply power to the energy storage circuit of the external defibrillator; The first isolated power supply module includes a load balancing sub-module, and a first isolated power supply sub-module, a second isolated power supply sub-module, a third isolated power supply sub-module, a fourth isolated power supply sub-module, a fifth isolated power supply sub-module, a sixth isolated power supply sub-module, a seventh isolated power supply sub-module, and an eighth isolated power supply sub-module that are connected in parallel and respectively connected to the load balancing sub-module; The load balancing sub-module includes a voltage conversion chip. The voltage conversion chip is used to convert a first voltage output by the external power supply into a second voltage, and drive the first isolated power supply sub-module, the second isolated power supply sub-module, the third isolated power supply sub-module, the fourth isolated power supply sub-module, the fifth isolated power supply sub-module, the sixth isolated power supply sub-module, the seventh isolated power supply sub-module, and the eighth isolated power supply sub-module respectively through the second voltage. The voltage conversion chip includes an ME2199 boost controller.

2. The isolated power supply circuit applied to an external defibrillator according to claim 1, characterized in that, The first isolated power supply sub-module, the second isolated power supply sub-module, the third isolated power supply sub-module, the fourth isolated power supply sub-module, the fifth isolated power supply sub-module, the sixth isolated power supply sub-module, the seventh isolated power supply sub-module, and the eighth isolated power supply sub-module all include a first isolation transformer; The first isolation transformer is used to electrically isolate the mutual feedback circuit of the external defibrillator from the external power supply.

3. The isolated power supply circuit applied to an external defibrillator according to claim 2, wherein The first isolation transformer includes a VPT87DDF01B type transformer.

4. The isolated power supply circuit applied to an external defibrillator according to claim 3, wherein, The first isolated power supply sub-module, the second isolated power supply sub-module, the third isolated power supply sub-module, the fourth isolated power supply sub-module, the fifth isolated power supply sub-module, the sixth isolated power supply sub-module, the seventh isolated power supply sub-module, and the eighth isolated power supply sub-module all include a first transformer driver electrically connected to the first isolation transformer. The first transformer driver is used to drive the first isolation transformer to work.

5. The isolated power supply circuit applied to an external defibrillator according to claim 4, characterized in that, The first transformer driver includes a VPS8703 type driver.

6. The isolated power supply circuit applied to an external defibrillator according to claim 1, wherein The second isolated power supply module includes a second isolation transformer; The second isolation transformer is used to electrically isolate the energy storage circuit of the external defibrillator from the external power supply.

7. The isolated power supply circuit applied to an external defibrillator according to claim 6, wherein, The second isolation transformer includes a VPT87DDF01B type transformer.

8. The isolated power supply circuit applied to an external defibrillator according to claim 7, wherein, The second isolated power supply module further includes a second transformer driver; The second transformer driver is used to drive the second isolation transformer to work.

9. The isolated power supply circuit applied to an external defibrillator according to claim 8, wherein, The second transformer driver includes a VPS8703 type driver.

10. An external defibrillator, comprising an energy storage circuit and a mutual feeding circuit, characterized in that, The external defibrillator further includes the isolated power supply circuit applied to the external defibrillator according to any one of claims 1 to 9.

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