Electric control high-low pressure automatic switching pump for wounded transfer cabin

Abstract

The electrically-controlled high-low pressure automatic conversion pump comprises a valve plate, an air inlet, an air outlet and a detection opening are formed in the valve plate, and the air inlet comprises a low-pressure air pump connector and a high-pressure air pump connector; the high-pressure air pump connector is connected with a high-pressure air pump through a high-pressure pipeline, a low-pressure output one-way valve is arranged on the high-pressure pipeline, the low-pressure air pump connector is directly connected with a low-pressure air pump through a high-pressure output one-way valve, a pressure sensor is installed on the detection port, and the high-pressure air pump, the low-pressure air pump and the pressure sensor are all connected with a control module. The structure is high in integration degree, the air pumps and the valve plate are integrated on one module, the pressure sensor is installed on the valve plate, the output one-way valves are installed at outlets of the high-pressure air pump and the low-pressure air pump, motors of the high-pressure pump and the low-pressure pump have the speed regulation function, work under coordination of the ECU, and low-pressure large-flow output and high-pressure small-flow output can be achieved; the output gas amount can be controlled by the ECU, and high and low pressure can be automatically switched.

Description

Technical Field

[0001] The invention belongs to the technical field of rescue equipment, and in particular relates to an electrically controlled high-low pressure automatic conversion pump for a wounded transport cabin. Background Art

[0002] The rescue transfer cabin used on the plateau needs to be pressurized and inflated so that the wounded can return to the quasi-plain state and prevent the wounded from further deteriorating their pulmonary edema and cerebral edema. The ideal inflation system for the transfer cabin should be: when the cabin starts to inflate, it should be inflated at a low pressure of 5kPa and a large flow of more than 500L / min, so that the cabin can be formed as soon as possible and reach the transfer state; when the cabin is formed, it should be inflated at a high pressure of 40kPa and a small flow of 20L / min. However, the existing medical rescue cabin is limited by its mass, power, and flow, and can only use a single flow air pump to complete this work. It cannot adjust the flow adaptively according to needs, which is not only not conducive to improving efficiency, but also the environmental changes in the transfer cabin are nonlinear adjustments, so the comfort is not ideal. If a single pump source is used to inflate the cabin, the performance of the pump source must take into account the flow of 500L / min and the inflation pressure of 40kPa, that is, the performance of the pump is: the flow is 500L / min and the pressure is 40kPa. The air pumps with such performance are basically volumetric pumps (such as diaphragm pumps or piston pumps). The characteristic of such pumps is that the flow rate of each cycle output is certain, with a flow rate of 500L / min at low pressure and 500L / min at high pressure. The mass of a pump with such performance is at least 15kg and the volume is more than 400*300*400mm. Regardless of the key indicators such as mass, volume, and power, it is not suitable for transfer cabin applications. More importantly, it is not applicable at a flow rate of 40kPa. Although the mass of an air pump with a small flow or small pressure is small, the power is usually less than 100W, which cannot meet the use requirements well. Therefore, it is necessary to improve the existing transfer cabin air pump. Summary of the invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes an electronically controlled high-low pressure automatic conversion pump for a wounded transport cabin.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] An electrically controlled high-low pressure automatic conversion pump for a wounded transport cabin comprises a valve plate, on which an air inlet, an air outlet and a detection port are arranged, the air inlet comprises a low-pressure air pump connection port and a high-pressure air pump connection port; the high-pressure air pump connection port is connected to a high-pressure air pump via a high-pressure pipeline, and a low-pressure output one-way valve is arranged on the high-pressure pipeline, the low-pressure air pump connection port is directly connected to the low-pressure air pump via the high-pressure output one-way valve, a pressure sensor is installed on the detection port, and the high-pressure air pump, the low-pressure air pump and the pressure sensor are all connected to a control module.

[0006] Furthermore, the high-pressure air pump and the low-pressure air pump are arranged on the same side of the valve plate.

[0007] Furthermore, the control module includes an ECU electronic controller unit.

[0008] Furthermore, the high-pressure pipeline is a rubber pipeline.

[0009] Furthermore, the air outlet is arranged on a side of the valve plate different from the air inlet.

[0010] Furthermore, an air supply pipe connector is installed on the air outlet.

[0011] Furthermore, an air inlet cavity is provided in the middle of the valve plate, the air inlet port and the air outlet port are axially perpendicular to the air inlet cavity, and the detection port is arranged at the end of the air inlet cavity.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The high- and low-pressure automatic conversion pump provided by the invention is lightweight and miniaturized in design, with high integration. The air pump and the valve plate are integrated into a module. The valve plate is equipped with a pressure sensor. The high-pressure air pump and the low-pressure air pump outlets are equipped with output check valves. The motors of the high- and low-pressure pumps have a speed regulation function and work under the coordination of the electronic control unit ECU. They can output low-pressure and high-flow and high-pressure and low-flow. The output gas volume can be controlled by the ECU, and the high and low pressures are automatically converted. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0015] Figure 1 A schematic diagram of the structure created by the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the valve plate in the embodiment of the present invention. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0019] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0020] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0021] An electronically controlled high and low pressure automatic conversion pump for a wounded transport cabin, such as Figure 1 and Figure 2As shown, it includes a valve plate 1, on which an air inlet, an air outlet 2 and a detection port 3 are arranged, and the air inlet includes a low-pressure air pump connection port 4 and a high-pressure air pump connection port 5; the high-pressure air pump connection port is connected to a high-pressure air pump 7 through a high-pressure pipeline 6, and a low-pressure output one-way valve 8 is arranged on the high-pressure pipeline, and the low-pressure air pump connection port is directly connected to a low-pressure air pump 9 through a high-pressure output one-way valve 10, and the low-pressure air pump and the valve plate are assembled into an integral structure, and a pressure sensor 11 is installed on the detection port, and the high-pressure air pump, the low-pressure air pump and the pressure sensor are all connected to a control module 12. Usually, the control module includes an ECU electronic controller unit. After the inflation system is started, the low-pressure pump works first, and after the low-pressure pump is inflated to the low-pressure limit (i.e., the parameter set by the ECU), the low-pressure pump stops working, the low-pressure one-way valve is closed and the high-pressure pump starts working at the same time, and the ECU controls the pump speed according to the local altitude, the inflation to the pressure limit and the pressure rise rate limit.

[0022] The output ends of the high-pressure and low-pressure air pumps are connected to the valve plate, and both are equipped with a one-way valve that outputs to the valve plate cavity. When the low-pressure pump is working, the gas first passes through the valve plate. The pressure sensor on the valve plate can detect the gas pressure and output it through the outlet. When the pressure reaches the low-pressure output pressure limit, the ECU controls the low-pressure pump to stop working, the output one-way valve of the low-pressure air pump is closed, and the high-pressure pump is started at the same time. The pressure sensor in the valve plate detects the gas pressure and the pressure rise rate. When the high-pressure pump reaches the inflation limit, the high-pressure pump stops working and the high-pressure output one-way valve is closed.

[0023] The high-pressure air pump and the low-pressure air pump are arranged on the same side of the valve plate, and the air inlet side corresponds to the air outlet side, which is very convenient for structural layout. The high-pressure pipeline adopts a rubber pipeline. The air outlet is arranged on the side of the valve plate different from the air inlet. An air supply pipe connector is installed on the air outlet. An air inlet cavity is provided in the middle of the valve plate. The air inlet and the air outlet are axially perpendicular to the air inlet cavity. The detection port is arranged at the end of the air inlet cavity. The pressure sensor is not directly blown by the air inlet airflow, and the operation is stable and the reliability is high.

[0024] In order to ensure the comfort of the wounded, the pressure increase rate in the cabin can be controlled as needed. When the wounded enter the cabin, the pressure increase rate is generally controlled at about 3 meters per second. At the beginning, the cabin is not filled yet, so it can work at a large flow rate (low-pressure pump full load). When the cabin is filled, it works at a pressure increase rate of 3 meters per second; therefore, the motors of the high and low pressure air pumps are motors with more sensitive speed regulation functions. When selecting an air pump, it is preferred to use a model that can be started with one button. The low pressure pump first works to inflate the cabin with a large flow rate and low pressure (and comply with the pressure increase rate limit controlled by the ECU), and the low pressure pump outputs gas through the inflation valve plate; at this time, the pressure sensor in the inflation valve plate senses the output gas pressure and pressure increase rate.

[0025] The low-pressure air pump is integrated with the valve plate, and a pressure sensor is installed on the valve plate. The whole set weighs less than 1.5kg, with high integration, light weight and miniaturization. The system is controlled by electronic drive, which can meet the performance of one-key start, automatic conversion of high and low pressure, and pressure increase rate control. The comprehensive control of the electronic control unit makes the work of the inflation pump closer to the actual use requirements of the transfer cabin. The performance of the pump meets the characteristics of maximum flow rate of 500L / min output under low pressure of 5kPa and low flow rate of about 20L / min output under high pressure of 40kPa, overcoming the shortcomings of a single pump source that requires a large flow of 500L / min and a high pressure of 40kPa, which is large and bulky.

[0026] When the pressure reaches the low-pressure setting value, the low-pressure pump automatically stops working and the low-pressure output one-way valve closes; at the same time, the high-pressure pump starts working. At this time, the pressure sensor in the inflation valve plate collects the output pressure signal and transmits it to the electronic control unit ECU. The electronic control unit calculates the inflation pressure according to the local altitude and complies with the pressure rise rate limit. The high-pressure pump inflates the cabin at full load or partial load. When the high-pressure pump pressure reaches the setting value corresponding to the local altitude, the high-pressure pump stops working; when the cabin needs to be ventilated, the system will open the cabin ventilation valve, and the high-pressure pump will also accept the command of the electronic control unit to start up to replenish air for the cabin.

[0027] The motor of the air pump in the invention is a motor with a more sensitive speed regulation function, and the air pump and the valve plate are integrated. The internal structure is that the gas output through the one-way valve is collected in the valve plate cavity, and a pressure sensor is installed at the end of the valve plate cavity. The integrated design is a composite air pump source with basic high and low pressure output capabilities. The motor drive and pressure sensor of the two air pumps are connected to the control unit ECU of the pump source. When working, they first work at low pressure, and the inflation flow rate can reach 500L / min; when the pressure sensor senses that the pressure reaches 5kPa, it automatically stops the low-pressure pump and starts the high-pressure pump to inflate at a flow rate of 20L / min. When the high-pressure pump works to the set pressure, the system can automatically shut down.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electronically controlled high and low pressure automatic conversion pump for a wounded transport cabin, characterized in that: It includes a valve plate, on which an air inlet, an air outlet and a detection port are arranged, the air inlet includes a low-pressure air pump connection port and a high-pressure air pump connection port; the high-pressure air pump connection port is connected to a high-pressure air pump via a high-pressure pipeline, and a low-pressure output one-way valve is arranged on the high-pressure pipeline, the low-pressure air pump connection port is directly connected to the low-pressure air pump via the high-pressure output one-way valve, and a pressure sensor is installed on the detection port, and the high-pressure air pump, the low-pressure air pump and the pressure sensor are all connected to a control module.

2. The electronically controlled high and low pressure automatic conversion pump for the wounded transport cabin according to claim 1 is characterized in that: The high-pressure air pump and the low-pressure air pump are arranged on the same side of the valve plate.

3. The electronically controlled high and low pressure automatic conversion pump for the wounded transport cabin according to claim 1 is characterized in that: The control module includes an ECU electronic controller unit.

4. The electronically controlled high and low pressure automatic conversion pump for the wounded transport cabin according to claim 1 is characterized in that: The high pressure pipeline is a rubber pipeline.

5. The electronically controlled high and low pressure automatic conversion pump for the wounded transport cabin according to claim 1 is characterized in that: The air outlet is arranged on a side of the valve plate different from the air inlet.

6. The electronically controlled high and low pressure automatic conversion pump for the wounded transport cabin according to claim 1 is characterized in that: An air supply pipe connector is installed on the air outlet.

7. The electronically controlled high and low pressure automatic conversion pump for the wounded transport cabin according to claim 1 is characterized in that: An air inlet cavity is provided in the middle of the valve plate, the air inlet port and the air outlet port are both axially perpendicular to the air inlet cavity, and the detection port is arranged at the end of the air inlet cavity.

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