Negative pressure adsorption system

Abstract

The utility model discloses a negative pressure adsorption system, which is respectively connected with a negative pressure adsorption interface and a cornea through a first gas circuit and a second gas circuit, realizes the adjustment of the negative pressure degree through an electromagnetic valve, thereby reducing the discomfort of a patient, and in addition, can realize the accurate control of the adsorption force of the cornea through a proportional valve. And the operation effect and precision are improved.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure control technology for the eye, and in particular to a negative pressure adsorption system. Background Technology

[0002] Femtosecond laser refractive surgery technology is rapidly developing. Due to the high precision of femtosecond laser pulse positioning and short operation time, keeping the patient's eyeball stationary during the procedure is a key factor in ensuring the accuracy of femtosecond laser surgery. Several patents disclose an ocular negative pressure adsorption docking unit. Patent CN110234301A discloses a docking unit that can adsorb the cornea onto a pressure plate, but it cannot guarantee uniform adsorption of the eyeball onto the pressure plate, and may even detach. Furthermore, existing ocular negative pressure adsorption docking units cannot achieve precise control of the adsorption pressure on the cornea, which may cause severe discomfort to the patient, thus affecting the surgical outcome and precision. Utility Model Content

[0003] This invention provides a negative pressure adsorption system, which can at least solve one of the problems pointed out in the background art.

[0004] A negative pressure adsorption system, comprising:

[0005] The first gas path is connected to the negative pressure adsorption interface via a connecting pipe;

[0006] The second airway connects to the cornea; and

[0007] Negative pressure control board;

[0008] The first and second gas paths each include a gas source, a pressure sensor, a negative pressure bottle, and a solenoid valve connected to the gas source.

[0009] The negative pressure control board is electrically connected to the solenoid valve and the pressure sensor. The negative pressure control board receives the numerical signal detected by the pressure sensor. When the value exceeds the preset threshold, the negative pressure control board sends a shutdown signal to the solenoid valve, and the solenoid valve shuts down the first air pump or the second air pump.

[0010] The first and second air passages also include a muffler, which is connected to the exhaust port of the solenoid valve.

[0011] The gas source, pressure sensor, and solenoid valve are connected through a three-way valve. The solenoid valve is connected to a negative pressure bottle, which is connected to a negative pressure interface. The negative pressure interface is connected to a negative pressure adsorption interface or a cornea through a connecting pipe.

[0012] Preferably, both the first gas path and the second gas path further include a filter, the filter being connected to a negative pressure port and a negative pressure bottle.

[0013] Preferably, the gas source is a vacuum pump or a diaphragm pump.

[0014] Preferably, the second air path also includes a proportional valve, which is installed on the pipeline connecting the solenoid valve, the pressure sensor, and the air pump.

[0015] The proportional valve is electrically connected to the negative pressure control board.

[0016] Preferably, it also includes a housing, in which the first air passage, the second air passage, and the negative pressure control board are all installed;

[0017] A cooling fan is also installed on the housing.

[0018] Compared with the prior art, the beneficial effects of this utility model are: this utility model connects to the negative pressure adsorption interface and the cornea through the first air path and the second air path respectively, and realizes the adjustment of negative pressure through the electromagnetic valve, thereby reducing the patient's discomfort. In addition, the proportional valve can realize the precise control of the corneal adsorption force, improving the surgical effect and accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the shell of a negative pressure adsorption system from one perspective.

[0020] Figure 2 A schematic diagram of the shell of the negative pressure adsorption system from another perspective;

[0021] Figure 3 This is a schematic diagram of the negative pressure adsorption system.

[0022] Figure 4 This is a block diagram of the first air path principle;

[0023] Figure 5 This is a block diagram of the second air path principle.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Housing, 2-Cooling fan, 3-Negative pressure control board, 4-Air source, 5-Solenoid valve, 6-Pressure sensor, 7-Silencer, 8-Negative pressure bottle, 9-Filter, 10-Proportional valve. Detailed Implementation

[0026] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0027] like Figures 1 to 5 As shown, the present invention provides a negative pressure adsorption system, including a first gas path, a second gas path, and a negative pressure control board 3 for realizing negative pressure control;

[0028] The first air path is connected to the negative pressure adsorption interface (eyeball interface) through a connecting pipe. The negative pressure adsorption interface is an existing structure (such as the interface disclosed in the patent with publication number CN114848292A), so it will not be described in detail here. The first air path includes an air source 4, a solenoid valve 5, and a pressure sensor 6. The solenoid valve 5, the air source 4, and the pressure sensor 6 are connected through a three-way valve. The solenoid valve 5 is used to control the opening and closing of the air source 4, and the pressure sensor 6 is used to receive the pressure of the first air path. If the pressure exceeds the preset value range, it sends a signal to the solenoid valve 5 to adjust the opening and closing of the air pump so that the pressure value in the first air path returns to the preset pressure range.

[0029] The second air path contacts the cornea through an external connecting tube. It also includes an air source 4, a solenoid valve 5, and a pressure sensor 6, which are connected by a three-way valve. In addition, the second air path also includes a proportional valve 10, which is electrically connected to the negative pressure control board 3. It is installed on the pipeline connecting the solenoid valve 5, the pressure sensor 6, and the air pump. The proportional valve 10 is controlled by voltage, which can be controlled by software based on external equipment, thereby achieving precise control of the pressure in the second air path and precise control of the pressure adsorbed onto the cornea.

[0030] The negative pressure control board 3 is electrically connected to the solenoid valve 5 and the pressure sensor 6. The negative pressure control board 3 receives the numerical signal detected by the pressure sensor 6. When the value exceeds the preset threshold, the negative pressure control board 3 sends a shutdown signal to the solenoid valve 5, and the solenoid valve 5 shuts down the first air pump or the second air pump.

[0031] In addition, both the first and second air passages in this embodiment include a muffler 7, which is connected to the exhaust port of the solenoid valve 5 to reduce operating noise.

[0032] Solenoid valve 5 is connected to negative pressure bottle 8, negative pressure bottle is connected to negative pressure interface on shell 1, and negative pressure interface is connected to negative pressure adsorption interface or to cornea through connecting tube.

[0033] To improve the service life of the gas source 4, both the first and second gas lines include filters 9, which are connected to the negative pressure interface and the negative pressure bottle 8.

[0034] In this embodiment, the gas source 4 is a vacuum pump or a diaphragm pump.

[0035] The negative pressure adsorption system in this embodiment also includes a housing 1. The first air passage, the second air passage, and the negative pressure control board 3 are all installed inside the housing 1. In order to reduce the operating temperature, a cooling fan 2 is also installed on the housing 1.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit and essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pressure swing adsorption system, characterized by, The application relates to a negative pressure control device for an eye cornea, which comprises the following parts: a first gas path connected with a negative pressure adsorption interface through a connecting pipe; a second gas path connected with the eye cornea; and a negative pressure control board; wherein the first gas path and the second gas path each comprise a gas source, a pressure sensor, a negative pressure bottle and an electromagnetic valve connected with the gas source; the negative pressure control board is electrically connected with the electromagnetic valve and the pressure sensor, the negative pressure control board receives a value signal detected by the pressure sensor, and when a preset threshold is exceeded, the negative pressure control board sends a closing signal to the electromagnetic valve, and the electromagnetic valve closes a first gas pump or a second gas pump.

2. A negative pressure adsorption system as claimed in claim 1, wherein, The first gas path and the second gas path each further comprise a silencer connected with an exhaust port of the electromagnetic valve.

3. A negative pressure adsorption system as claimed in claim 1, wherein, The gas source, the pressure sensor and the electromagnetic valve are communicated through a three-way valve, the electromagnetic valve is communicated with the negative pressure bottle, the negative pressure bottle is communicated with a negative pressure interface, and the negative pressure interface is connected with the negative pressure adsorption interface or the eye cornea through the connecting pipe.

4. A pressure swing adsorption system as in claim 1, wherein, The first gas path and the second gas path each further comprise a filter which is communicated with the negative pressure interface and the negative pressure bottle.

5. A pressure swing adsorption system as claimed in claim 1, wherein, The gas source is a vacuum pump or a diaphragm pump.

6. A pressure swing adsorption system as in claim 1, wherein, The second gas path further comprises a proportional valve installed on a pipe connected with the electromagnetic valve, the pressure sensor and the gas pump; the proportional valve is electrically connected with the negative pressure control board.

7. A pressure swing adsorption system as in claim 1, wherein, The application further comprises a shell, and the first gas path, the second gas path and the negative pressure control board are installed in the shell; a cooling fan is further installed on the shell.

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