Vacuum pump control circuit of biopsy system and biopsy system

Abstract

The utility model discloses a vacuum pump control circuit of biopsy system and biopsy system.The vacuum pump control circuit of biopsy system comprises a capacitance circuit connected with a vacuum pump in parallel, the capacitance circuit comprises a first capacitor, a second capacitor and a first state switching element, and the first capacitor is kept in parallel connection with the vacuum pump; the second capacitor is connected in parallel with the vacuum pump; the first state switching element is connected with the second capacitor in series, and the first state switching element is used for disconnecting or connecting the second capacitor and the vacuum pump through state switching. According to the technical scheme, when the biopsy system is started, starting capacitors of the vacuum pump are the first capacitor and the second capacitor, enough electric energy is provided for on-load starting of the vacuum pump through the newly-added second capacitor, and therefore the on-load starting capacity of the vacuum pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a vacuum pump control circuit of a biopsy system and a biopsy system. Background Art

[0002] The vacuum-assisted biopsy system is a medical device used for minimally invasive treatment or biopsy of masses (tumors). The vacuum-assisted biopsy system is mainly composed of a host, a biopsy surgical device, and a vacuum negative pressure system. The system mainly punctures the biopsy needle of the biopsy surgical device to the surgical site under the guidance of imaging equipment (such as B-ultrasound), and then uses electrical control to make the biopsy needle partially or completely excise the lesion tissue through mechanical movement, and finally transports the excised tissue specimen to the collection location through negative pressure for subsequent sample analysis and testing.

[0003] Since the AC vacuum pump has the advantages of high negative pressure and high flow, at present, the vacuum negative pressure system of the vacuum-assisted biopsy system often uses an AC vacuum pump as the negative pressure source. However, many existing biopsy systems have the disadvantage of poor load starting capability. Of course, it is also possible to provide the biopsy system with a strong load starting capability, but there is a problem of high temperature rise rate after long-term operation.

[0004] The above contents are only used to assist in understanding the technical solution of the present utility model and do not constitute an admission that the above contents are prior art. Utility Model Content

[0005] The main purpose of the utility model is to provide a biopsy system and a control circuit thereof, aiming to solve the technical problem of poor load starting capability of an AC vacuum pump in an existing vacuum-assisted breast biopsy system.

[0006] To achieve the above object, the utility model provides a vacuum pump control circuit of a biopsy system, comprising a capacitor circuit connected in parallel with the vacuum pump, wherein the capacitor circuit comprises:

[0007] a first capacitor, wherein the first capacitor is connected in parallel with the vacuum pump;

[0008] a second capacitor, the second capacitor being connected in parallel with the vacuum pump;

[0009] A first state switching element is connected in series with the second capacitor, and the first state switching element is used to disconnect or connect the second capacitor from the vacuum pump through state switching.

[0010] Furthermore, the vacuum pump control circuit also includes a controller, and the controller is connected to the first state switching element.

[0011] Furthermore, the state of the first state switching element includes a closed state and an open state.

[0012] When the first state switching element is in a closed state, the second capacitor is connected in parallel with the first capacitor and the vacuum pump;

[0013] When the first state switching element is in an off state, the second capacitor is disconnected from the vacuum pump and the first capacitor at the same time.

[0014] Furthermore, the first state switching element is a high-voltage power relay.

[0015] Furthermore, the vacuum pump control circuit also includes a second state switching element, the vacuum pump is connected to a power supply, the second state switching element is connected in series with the power supply and the vacuum pump, the second state switching element is used to control the power supply state of the vacuum pump through state switching, and the second state switching element is connected to the controller.

[0016] Furthermore, the state of the second state switching element includes a closed state and an open state.

[0017] When the second state switching element is in the off state, the vacuum pump stops operating.

[0018] Furthermore, the second state switching element is a solid-state relay.

[0019] Furthermore, the vacuum pump is an AC vacuum pump.

[0020] Furthermore, the controller is also connected to a vacuum pump current collection circuit.

[0021] In addition, to achieve the above-mentioned purpose, the utility model also provides a biopsy system, which includes a vacuum pump and the vacuum pump control circuit of the aforementioned biopsy system.

[0022] The technical solution of the utility model adopts the method of adding a second capacitor at both ends of the vacuum pump. When the biopsy system is started, the starting capacitor of the vacuum pump is the first capacitor + the second capacitor. The newly added second capacitor provides sufficient electrical energy for the vacuum pump to start with load, thereby improving the load starting capability of the vacuum pump.

[0023] At the same time, by connecting the first state switching element in series in the circuit of the second capacitor, after the vacuum pump runs smoothly, by disconnecting the first state switching element, the access capacitor of the vacuum pump is made the first capacitor, so that the first capacitor is used as the capacitor when the vacuum pump is running, thereby reducing the operating heat of the vacuum pump without affecting the load capacity of the vacuum pump, reducing the temperature rise rate when the vacuum pump is running, and allowing the vacuum pump to continue to run for a long time without stopping for cooling, thereby further improving the surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a vacuum pump control circuit of a biopsy system of the utility model;

[0025] Figure 2 It is a structural schematic diagram of another embodiment of the vacuum pump control circuit of the biopsy system of the utility model;

[0026] Figure 3 It is a structural schematic diagram of another embodiment of the vacuum pump control circuit of the biopsy system of the utility model.

[0027] Description of Figure Numbers:

[0028]

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] Biopsy is the abbreviation of pathological examination of living tissue. It refers to the method of taking diseased tissue from the patient's living body for side-by-side examination by surgical methods such as local excision, forceps, puncture needle aspiration, scraping, and removal to determine the diagnosis. During the biopsy process, a small incision is made on the skin at the puncture site under local anesthesia, and a thicker pillow or a puncture needle with a needle core is inserted to suck out a small piece of tissue for pathological examination. Or use a drill to extract the material. At present, the vacuum negative pressure system of the vacuum-assisted biopsy system often uses an AC vacuum pump as the negative pressure source. In order to ensure the safety of the operation, the starting power of the AC vacuum pump at the start-up is the same as that during the operation, which makes the starting power of the AC vacuum pump low, resulting in poor load starting ability of the AC vacuum pump.

[0034] Based on the problems existing in the above technical solutions, the present application provides a vacuum pump control circuit for a biopsy system, including a capacitor circuit connected in parallel with the vacuum pump, the capacitor circuit including: a first capacitor, a second capacitor and a first state switching element, the first capacitor is maintained in parallel with the vacuum pump; the second capacitor is connected in parallel with the vacuum pump; the first state switching element is connected in series with the second capacitor, and the first state switching element is used to disconnect or connect the second capacitor to the vacuum pump through state switching. By adding a second capacitor in parallel on both sides of the input and output of the vacuum pump, when the biopsy system is started, the first capacitor and the second capacitor are connected to the circuit at the same time, so that the connected capacitor when the vacuum pump is started is the first capacitor + the second capacitor, thereby increasing the starting power when the vacuum pump is started, and improving the load starting capability of the vacuum pump.

[0035] The utility model provides a vacuum pump control circuit of a biopsy system.

[0036] Reference Figures 1 to 3 , Figure 1 It is a structural schematic diagram of an embodiment of a vacuum pump control circuit of a biopsy system of the utility model; Figure 2 This is a schematic diagram of the structure of another embodiment of the vacuum pump control circuit of the biopsy system of the utility model. Figure 3 It is a structural schematic diagram of another embodiment of the vacuum pump control circuit of the biopsy system of the utility model.

[0037] In the embodiment of the present utility model, Figure 1 As shown, the vacuum pump control circuit of the biopsy system includes a capacitor circuit 100, which is connected in parallel with the vacuum pump 200. The capacitor circuit 100 includes: a first capacitor 110, a second capacitor 120 and a first state switching element 130. The vacuum pump 200 is an AC vacuum pump.

[0038] like Figure 1 , Figure 2 , Figure 3As shown, the first capacitor 110 is connected in parallel with the vacuum pump 200, and the second capacitor 120 is connected in parallel with the vacuum pump 200; the first capacitor 110 is the starting capacitor of the vacuum pump 200 in the existing biopsy system, and the second capacitor 120 is the newly added capacitor of the present application, and the second capacitor 120, the first capacitor 110 and the vacuum pump 200 are electrically connected in parallel to form a parallel circuit. Specifically, in a conventional biopsy system, the first capacitor 110 is connected in parallel with the vacuum pump 200, and the second capacitor 120 is connected in parallel at both ends of the circuit between the first capacitor 110 and the vacuum pump 200 to form a parallel circuit of the present application, and the second capacitor 120, the first capacitor 110 and the vacuum pump 200 are connected in parallel respectively.

[0039] like Figure 1 , Figure 2 , Figure 3 As shown, the first state switching element 130 is connected in series with the second capacitor 120 , and the first state switching element 130 is used to disconnect or connect the connection between the second capacitor 120 and the vacuum pump 200 through state switching.

[0040] The first state switching element 130 may be a high voltage power relay. Figure 1 As shown, the first state switching element 130 is connected in series with the second capacitor 120 to form a series circuit, and the series circuit is connected in parallel with the vacuum pump 200. Then, the series circuit formed by the first state switching element 130 and the second capacitor 120 is added to the traditional biopsy system. When the first state switching element 130 is in an open state, the parallel connection between the second capacitor 120 and the vacuum pump 200 is disconnected. When the first state switching element 130 is in a closed state, the second capacitor 120 is connected in parallel with the vacuum pump 200.

[0041] Furthermore, if Figure 2 As shown, the vacuum pump control circuit further includes a controller 300, and the controller 300 is connected to the first state switching element 130. The controller 300 may be an MCU of the biopsy system, and the controller 300 may control the first state switching element 130 to switch states.

[0042] Furthermore, in a possible implementation, if Figure 1 , Figure 2 , Figure 3 As shown, the state of the first state switching element 130 includes a closed state and an open state. When the first state switching element 130 is in the closed state, the second capacitor 120 is simultaneously connected in parallel with the first capacitor 110 and the vacuum pump 200; when the first state switching element 130 is in the open state, the second capacitor 120 is simultaneously disconnected from the vacuum pump 200 and the first capacitor 110.

[0043] In this embodiment, after the biopsy system is connected to an AC 220V power supply and turned on, the controller 300 controls the first state switching element 130 to close. Specifically, the controller 300 can send a control instruction to the first state switching element 130, and the first state switching element 130 performs a closing operation according to the control instruction, so that the first state switching element 130 is closed and in a closed state, so that the second capacitor 120 is simultaneously connected in parallel with the first capacitor 110 and the vacuum pump 200, and the two ends of the second capacitor 120 are respectively electrically connected to the two poles of the power supply, and the vacuum pump 200 is connected to the power supply to start running. At this time, the vacuum pump 20 The first capacitor 110 and the second capacitor 120 connected in parallel simultaneously serve as the starting capacitor of the vacuum pump 200, that is, the starting capacitor of the vacuum pump 200 = the first capacitor 110 + the second capacitor 120, wherein the first capacitor 110 can provide sufficient electric energy for the normal operation of the vacuum pump 200, and the second capacitor 120 provides sufficient electric energy for the load starting of the vacuum pump 200, that is to say, the first capacitor 110 and the second capacitor 120 simultaneously provide sufficient electric energy for the load starting of the vacuum pump 200, thereby improving the load starting capability of the vacuum pump 120.

[0044] In this embodiment, after the vacuum pump 200 starts running, the controller 300 can detect in real time whether the vacuum pump 200 is in a stable running state. Specifically, the controller 300 can detect or judge the stable running state through the operating parameters of the vacuum pump 200. When the vacuum pump 200 runs smoothly, the controller 300 controls the first state switching element 130 to disconnect. Specifically, the controller 300 can send a disconnection instruction to the first state switching element 130, and the first state switching element 130 performs a disconnection operation according to the received disconnection instruction, so that the first state switching element 130 is disconnected and is in a state of Disconnected state, at this time, the second capacitor 120 is disconnected from the vacuum pump 200 and the first capacitor 110 at the same time, and the access capacitor of the vacuum pump 200 is the first capacitor 110, so that the first capacitor 110 is used as the capacitor when the vacuum pump 200 is running. The first capacitor 110 can provide sufficient electrical energy for the normal operation of the vacuum pump 200, thereby reducing the operating heat of the vacuum pump 200 without affecting the load capacity of the vacuum pump 200, reducing the temperature rise rate when the vacuum pump 200 is running, and allowing the vacuum pump 200 to continue to operate for a long time without stopping for cooling, thereby further improving the surgical efficiency.

[0045] Furthermore, in a possible implementation, if Figure 3 As shown, the vacuum pump control circuit also includes a second state switching element 400, the vacuum pump 200 is connected to a power supply, the second state switching element 400 is connected in series with the power supply and the vacuum pump 200, the second state switching element 400 is used to control the power supply state of the vacuum pump 200 through state switching, and the second state switching element 400 is connected to the controller 300.

[0046] The second state switching element 400 is a solid-state relay. The state of the second state switching element 400 includes a closed state and an open state. When the second state switching element 400 is in the open state, the vacuum pump 200 stops running.

[0047] In this embodiment, after the biopsy system is connected to an AC 220V power supply and turned on, the controller 300 controls the first state switching element 130 and the second state switching element 400 to close. Specifically, the controller 300 can send a control instruction to the first state switching element 130 and the second state switching element 400, and the first state switching element 130 and the second state switching element 400 respectively perform a closing operation according to the control instruction, so that the first state switching element 130 and the second state switching element 400 are in a closed state, so that the second capacitor 120 is connected in parallel with the first capacitor 110 and the vacuum pump 200 at the same time, and the two ends of the second capacitor 120 are respectively electrically connected to the two poles of the power supply. Then, the vacuum pump 200 is connected to the power supply and starts running. At this time, the first capacitor 110 and the second capacitor 120 connected in parallel with the vacuum pump 200 simultaneously serve as the starting capacitor of the vacuum pump 200, that is, the starting capacitor of the vacuum pump 200 = the first capacitor 110 + the second capacitor 120, wherein the first capacitor 110 can provide sufficient electrical energy for the normal operation of the vacuum pump 200, and the second capacitor 120 provides sufficient electrical energy for the load starting of the vacuum pump 200, that is, the first capacitor 110 and the second capacitor 120 simultaneously provide sufficient electrical energy for the load starting of the vacuum pump 200, thereby improving the load starting capability of the vacuum pump 120.

[0048] The controller 300 can control the second state switching element 400 to switch states. For example, at the end of the operation, the biopsy system can trigger an end-of-operation instruction. When the end-of-operation instruction is detected, the controller 300 can send a disconnection instruction to the second state switching element 400. The second state switching element 400 performs a disconnection operation according to the disconnection instruction. When the second state switching element 400 is in the disconnected state, the vacuum pump 200 stops running.

[0049] It should be noted that the controller 300 is also connected to a vacuum pump current acquisition circuit to acquire the working current of the vacuum pump 300 through the vacuum pump current acquisition circuit. The controller 300 can determine whether the vacuum pump 300 is running smoothly based on the acquired working current. The vacuum pump current acquisition circuit may include a current transformer connected to the vacuum pump 300. The vacuum pump current acquisition circuit may adopt an existing current acquisition circuit, as long as it can realize current acquisition, which will not be described in detail here.

[0050] The technical solution of the utility model adopts the method of adding a second capacitor 120 at both ends of the vacuum pump 200. When the biopsy system is started, the starting capacitor of the vacuum pump 200 is the first capacitor 110 + the second capacitor 120. The newly added second capacitor 120 provides sufficient electrical energy for the load starting of the vacuum pump 200, thereby improving the load starting capability of the vacuum pump 200.

[0051] At the same time, by connecting the first state switching element 130 in series in the circuit of the second capacitor 120, after the vacuum pump 200 runs smoothly, by disconnecting the first state switching element 130, the access capacitor of the vacuum pump 200 is made the first capacitor 110, so that the first capacitor 110 is used as the capacitor when the vacuum pump 200 is running, thereby reducing the operating heat of the vacuum pump 200 without affecting the load capacity of the vacuum pump 200, reducing the temperature rise rate of the vacuum pump 200 when it is running, and allowing the vacuum pump 200 to continue to run for a long time without stopping for cooling, thereby further improving the surgical efficiency.

[0052] It should be emphasized that the first capacitor 110 may be a single capacitor or a capacitor combination formed by a combination of multiple sub-capacitors, and the second capacitor 120 may also be a single capacitor or a capacitor combination formed by a combination of multiple sub-capacitors.

[0053] The utility model also proposes a biopsy system, which includes a vacuum pump and a vacuum pump control circuit of the biopsy system. The specific structure of the vacuum pump control circuit of the biopsy system refers to the above embodiment. Since the biopsy system adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0054] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0055] The serial numbers of the above-mentioned embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0056] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A vacuum pump control circuit for a biopsy system, characterized in that: A capacitor circuit is connected in parallel with the vacuum pump, wherein the capacitor circuit comprises: a first capacitor, wherein the first capacitor is connected in parallel with the vacuum pump; a second capacitor, the second capacitor being connected in parallel with the vacuum pump; A first state switching element is connected in series with the second capacitor, and the first state switching element is used to disconnect or connect the second capacitor from the vacuum pump through state switching.

2. The vacuum pump control circuit according to claim 1, characterized in that: The vacuum pump control circuit further includes a controller connected to the first state switching element.

3. The vacuum pump control circuit according to claim 1, characterized in that: The state of the first state switching element includes a closed state and an open state, When the first state switching element is in a closed state, the second capacitor is connected in parallel with the first capacitor and the vacuum pump; When the first state switching element is in an off state, the second capacitor is disconnected from the vacuum pump and the first capacitor at the same time.

4. The vacuum pump control circuit according to claim 1, characterized in that: The first state switching element is a high voltage power relay.

5. The vacuum pump control circuit according to claim 2, characterized in that: The vacuum pump control circuit also includes a second state switching element, the vacuum pump is connected to a power supply, the second state switching element is connected in series with the power supply and the vacuum pump, the second state switching element is used to control the power supply state of the vacuum pump through state switching, and the second state switching element is connected to the controller.

6. The vacuum pump control circuit according to claim 5, characterized in that: The state of the second state switching element includes a closed state and an open state, When the second state switching element is in the off state, the vacuum pump stops operating.

7. The vacuum pump control circuit according to claim 5, characterized in that: The second state switching element is a solid state relay.

8. The vacuum pump control circuit according to claim 1, characterized in that: The vacuum pump is an AC vacuum pump.

9. The vacuum pump control circuit according to any one of claims 2, 5-7, characterized in that: The controller is also connected to a vacuum pump current collection circuit.

10. A biopsy system, characterized in that: The biopsy system comprises a vacuum pump and a vacuum pump control circuit according to any one of claims 1 to 9.

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