An air pressure therapy device and one-way pressure relief valve

Abstract

The application discloses a one-way pressure reducing valve, which comprises a valve body, a plunger and an exhaust diaphragm. In operation, when gas flows from a gas inlet to a gas outlet, the exhaust diaphragm is blocked by the gas pressure of the second communication port, and the gas pushes the plunger to flow to the gas outlet through the first communication port. When the gas on the side of the gas inlet cannot overcome the force of the elastic member, the gas stops flowing to the side of the gas outlet, and the gas pressure value on the side of the gas inlet is lower than that on the side of the gas outlet. The application also provides an air pressure therapy instrument comprising the one-way pressure reducing valve, which comprises a limb pressure sleeve, the limb pressure sleeve comprises a plurality of groups of parallelly arranged pressure cavities, and the pressure cavities are connected with air tubes. By using the one-way pressure reducing valve, the pressure of the plurality of sub-chambers of the pressure cavities gradually decreases from the distal end to the proximal end, the pressure of the plurality of groups of pressure cavities is controlled, the pressure of the plurality of sub-chambers gradually decreases, and the use cost of the main machine is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices and their peripheral facilities, in particular to an air pressure therapeutic instrument and a one-way pressure reducing valve. BACKGROUND

[0002] Intermittent Pneumatic Compression (IPC) is a method of promoting blood circulation and accelerating the return of tissue fluid by applying periodic pressure to the limbs, thereby relieving the clinical symptoms of edema, pain, acid swelling, heavy feeling of the limbs, and intermittent claudication caused by venous edema of the limbs and arterial ischemia of the lower limbs.

[0003] In the prior art, air pressure therapeutic instruments are often used to perform compression therapy. An air pressure therapeutic instrument is a medical instrument that uses an embedded single-chip microcomputer system to control the output of air with a certain pressure from an electromagnetic valve controlled by a gas pump, and sequentially fills a pressure leg sleeve wrapped around the patient's limbs according to a certain operation mode to physically treat the patient. Since the parameters such as the inflation pressure, sequence, and time can be set by a single-chip microcomputer, multiple treatment modes can be combined for the treatment of patients of different types. It has a significant therapeutic effect on edema and blood circulation disorders. The air pressure therapeutic instrument uses an embedded single-chip microcomputer as the system core, accepts operations through a human-machine interface, controls the gas pump to output air with a certain pressure, and distributes the air to the pressure leg sleeve through an electromagnetic valve. The pressure leg sleeve wrapped around the limbs and the control host for inflation form a charging and discharging system, which generates pulsatile blood flow through the circulatory system of the limbs through the mechanical action of periodic compression and decompression, thereby promoting blood circulation in the limbs.

[0004] The part of the therapeutic instrument that acts on the patient is one or a pair of limb sleeves with one or several independent air bags, and the working part is composed of a gas pump, an electromagnetic valve group, and a human-machine interface controlled by an embedded single-chip microcomputer. After the operator sets the working time, pressure, and other parameters of the product through the human-machine interface, the embedded system controls the pressure leg sleeve to work according to the set parameters. During the working process, the patient's limbs are subjected to different pressures and sequences for a certain period of time, achieving the purpose of improving the patient's limb fluid circulation state in a physical way.

[0005] The air pressure therapy instrument is mainly composed of a therapy instrument host, an air pipe and a limb pressure sleeve, wherein the limb pressure sleeve is divided into several chambers, receives air with certain pressure output by the host, and the chambers expand and form certain pressure on the patient's limbs. Taking a pressure leg sleeve as an example, when the first chamber is inflated to the preset pressure, the host controls the next chamber to be inflated according to the preset sequence, and each chamber is inflated, expanded and deflated in turn. According to the process of inflating and deflating in turn from the distal end to the proximal end, the accumulated tissue fluid can be pushed back into the blood circulation, promoting venous blood return, helping to prevent deep vein thrombosis and eliminate limb venous edema; according to the reverse process, it helps to improve limb ischemic diseases, treat lower extremity arterial ischemic diseases, and at the same time promote limb blood circulation and relieve various symptoms caused thereby.

[0006] Among them, the limb pressure sleeve is an important functional component to realize the air pressure therapy instrument, and in the prior art, the host has several output channels, the sleeve has several chambers, and they have a one-to-one correspondence. In actual application, the pressure of the chamber near the heart end often needs to be slightly lower than that of the chamber far from the heart end, so the air pipe needs to be set according to the number of chambers, and the increase of the number of chambers can bring greater pressure density, which is of great benefit to the function of the product. However, with the increase of the number of chambers, the air pipe also increases, and the number of control solenoid valves needs to be increased in the host to increase the output chamber number, and the use cost of the host increases accordingly. If the number of chambers is increased in parallel, but the pressure between the adjacent chambers is the same, the treatment effect is not improved, and it can be seen that the number of chambers of the existing limb pressure sleeve is often limited by the line connection, which reduces the treatment effect of the therapy instrument.

[0007] Therefore, how to change the poor treatment effect of the air therapy instrument caused by the limitation of pipe connection in the prior art has become a problem to be solved by those skilled in the art. SUMMARY

[0008] The purpose of the present application is to provide an air pressure therapy instrument and a one-way pressure reducing valve to solve the problems existing in the prior art and enhance the treatment effect of the air pressure therapy instrument and reduce the use cost of the air pressure therapy instrument.

[0009] To achieve the above purpose, the present application provides the following scheme: the present application provides a one-way pressure reducing valve, comprising:

[0010] A valve body has an air inlet, an air outlet, a first communication port and a second communication port, and the air inlet can be connected with the air outlet through the first communication port or the second communication port;

[0011] A plunger is slidably connected to the valve body, and the plunger is capable of blocking the first communication port. An elastic member is arranged between the plunger and the valve body.

[0012] An exhaust diaphragm is capable of blocking the second communication port. The exhaust diaphragm is made of flexible material, and the exhaust diaphragm is arranged on the side of the second communication port close to the air inlet.

[0013] Preferably, a sealing element is arranged between the plunger and the first communication port.

[0014] Preferably, the plunger comprises a head and a rod. The rod is slidably connected to the valve body, and the head is capable of blocking the first communication port.

[0015] Preferably, the head is in the shape of a circular truncated cone. The larger-diameter end of the head is connected to the rod. The diameter of the larger-diameter end of the head is larger than the diameter of the first communication port. The diameter of the smaller-diameter end of the head is smaller than the diameter of the first communication port.

[0016] Preferably, the elastic member is a spring, and the spring is sleeved on the outside of the rod.

[0017] Preferably, the exhaust diaphragm comprises a connecting portion and a diaphragm portion. The connecting portion is detachably connected to the valve body. The diameter of the diaphragm portion is larger than the diameter of the connecting portion. The diaphragm portion is capable of blocking the second communication port.

[0018] Preferably, the valve body has a positioning groove capable of accommodating the diaphragm portion. The positioning groove is in communication with the second communication port. The end of the positioning groove in communication with the second communication port is arc-shaped. The surface of the diaphragm portion facing the second communication port is arc-shaped.

[0019] Preferably, the valve body comprises an air outlet housing, an intermediate housing, and an air inlet housing connected in sequence. The air outlet housing and the air inlet housing are detachably connected to the intermediate housing. The air outlet is arranged on the air outlet housing. The air inlet is arranged on the air inlet housing. The first communication port and the second communication port are both arranged on the intermediate housing. The plunger is slidably connected to the air outlet housing. The exhaust diaphragm is detachably connected to the air inlet housing.

[0020] Preferably, the axis of the air inlet and the axis of the air outlet are both located between the axis of the plunger and the axis of the exhaust diaphragm.

[0021] The application further provides an air pressure therapy instrument comprising the one-way pressure reducing valve, comprising a limb pressure sleeve, the limb pressure sleeve comprises a plurality of groups of pressure cavities arranged in parallel, and the pressure cavities are connected with the air pipe.

[0022] The pressure cavities comprise N+1 sub-chambers, the first sub-chamber is connected with the air pipe through the first branch, the number of the sub-chambers is consistent with the number of the branches and corresponds to the branches one by one, the N+1 sub-chamber is connected with the N sub-chamber through the N+1 branch, and the one-way pressure reducing valve is arranged between the N+1 sub-chamber and the N sub-chamber, wherein N is greater than or equal to 1.

[0023] The one-way pressure reducing valve of the application comprises a valve body, a plunger and an exhaust diaphragm, wherein the valve body has an air inlet, an air outlet, a first communication port and a second communication port, the air inlet is connected with the air outlet through the first communication port or the second communication port, the plunger is slidably connected with the valve body, the plunger can block the first communication port, an elastic member is arranged between the plunger and the valve body, and the plunger is arranged on the side of the first communication port close to the air outlet; the exhaust diaphragm can block the second communication port, the exhaust diaphragm is made of a flexible material, and the exhaust diaphragm is arranged on the side of the second communication port close to the air inlet.

[0024] When the one-way pressure reducing valve works, when the gas flows from the air inlet to the air outlet, the exhaust diaphragm blocks the second communication port under the pressure of the gas, the gas pushes the plunger to flow to the air outlet through the first communication port by overcoming the force of the elastic member, when the gas on the side of the air inlet cannot overcome the force of the elastic member, the gas stops flowing to the side of the air outlet, and the pressure value of the gas on the side of the air inlet is higher than that on the side of the air outlet; when the gas needs to be discharged, the gas flows from the air outlet to the air inlet, the gas pushes the exhaust diaphragm to be discharged from the air inlet through the second communication port, and the energy consumption of the gas pushing the exhaust diaphragm is small, so that the gas can be smoothly discharged. The one-way pressure reducing valve is applied to the air pressure therapy instrument, a chamber can be divided into a plurality of small chambers, the plurality of small chambers are connected in series through the one-way pressure reducing valve, the pressure of the near-end chamber is slightly lower than that of the far-end chamber, the distribution density of the chamber in the limb pressure sleeve can be effectively improved, and the control solenoid valve does not need to be increased, so that the problems in the prior art are solved.

[0025] The application further provides an air pressure therapy instrument comprising the one-way pressure reducing valve, comprising a limb pressure sleeve, the limb pressure sleeve comprising a plurality of groups of pressure cavities arranged in parallel, the pressure cavities being connectable with the air pipe; the pressure cavity comprising N+1 sub-chambers, the first sub-chamber being connected with the air pipe through the first branch, the number of the sub-chambers being consistent with and corresponding to the number of the branches, the N+1 sub-chamber being connected with the Nth sub-chamber through the N+1 branch, and the one-way pressure reducing valve being arranged between the N+1 sub-chamber and the Nth sub-chamber, wherein N is greater than or equal to 1.

[0026] The air pressure therapy instrument of the application utilizes the one-way pressure reducing valve to gradually reduce the pressure of the sub-chambers of the pressure cavity from the distal end to the proximal end, and to gradually reduce the pressure of the sub-chambers of the pressure cavities by controlling the pressure of the pressure cavities, thereby enhancing the treatment effect of the instrument while reducing the cost of the main machine. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0028] Figure 1 Fig. 1 is a structural schematic diagram of the one-way pressure reducing valve of the application;

[0029] Figure 2 Fig. 2 is an enlarged schematic diagram of part of the structure of the one-way pressure reducing valve of the application;

[0030] Figure 3 Fig. 3 is a working principle diagram of the air pressure therapy instrument of the application;

[0031] In the figure, 100a is the one-way pressure reducing valve, 1 is the valve body, 101 is the air inlet, 102 is the air outlet, 103 is the first communication port, 104 is the second communication port, 105 is the positioning groove, 106 is the air outlet shell, 107 is the intermediate shell, 108 is the air inlet shell, 2 is the plunger, 201 is the elastic member, 202 is the sealing element, 203 is the head, 204 is the rod, 3 is the exhaust diaphragm, 301 is the connecting part, 302 is the diaphragm part, 200a is the main machine, and 300a is the sub-chamber. DETAILED DESCRIPTION

[0032] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0033] The present application aims to provide an air pressure therapy instrument and a one-way pressure reducing valve to solve the problems in the prior art, enhance the treatment effect of the air pressure therapy instrument, and reduce the use cost of the air pressure therapy instrument.

[0034] To make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0035] Please refer to Figures 1-3 , wherein, Figure 1 is a structural schematic diagram of the one-way pressure reducing valve of the present application, Figure 2 is an enlarged schematic diagram of part of the structure of the one-way pressure reducing valve of the present application, Figure 3 is a working principle diagram of the air pressure therapy instrument of the present application.

[0036] The present application provides a one-way pressure reducing valve 100a, comprising:

[0037] a valve body 1, the valve body 1 having an air inlet 101, an air outlet 102, a first communication port 103 and a second communication port 104, the air inlet 101 being capable of communicating with the air outlet 102 by the first communication port 103 or the second communication port 104;

[0038] a plunger 2, the plunger 2 being slidably connected with the valve body 1, the plunger 2 being capable of blocking the first communication port 103, an elastic member 201 being arranged between the plunger 2 and the valve body 1, the plunger 2 being arranged on the side of the first communication port 103 close to the air outlet 102;

[0039] an exhaust diaphragm 3, the exhaust diaphragm 3 being detachably connected with the valve body 1, the exhaust diaphragm 3 being capable of blocking the second communication port 104, the exhaust diaphragm 3 being made of a flexible material, the exhaust diaphragm 3 being arranged on the side of the second communication port 104 close to the air inlet 101.

[0040] When the one-way pressure reducing valve 100a of the present application works, when the gas flows from the gas inlet 101 to the gas outlet 102, the exhaust diaphragm 3 is blocked to the second communication port 104 by the gas pressure, the gas overcomes the force of the elastic member 201, pushes the plunger 2, the plunger 2 is away from the first communication port 103, so that the first communication port 103 is opened, and the gas flows to the gas outlet 102 through the first communication port 103; when the gas on the side of the gas inlet 101 cannot overcome the force of the elastic member 201, the gas stops flowing to the side of the gas outlet 102, and the gas pressure value on the side of the gas inlet 101 is higher than that on the side of the gas outlet 102; when the gas needs to be discharged, the gas flows from the gas outlet 102 to the gas inlet 101, the gas pushes the exhaust diaphragm 3, the exhaust diaphragm 3 opens the second communication port 104, and the gas is discharged from the gas inlet 101 through the second communication port 104. Since the energy consumption of the gas pushing the exhaust diaphragm 3 is small, the gas is discharged smoothly.

[0041] In order to avoid the gas leakage between the plunger 2 and the first communication port 103, the sealing element 202 is arranged between the plunger 2 and the first communication port 103, and the air tightness of the one-way pressure reducing valve 100a is enhanced.

[0042] Specifically, the plunger 2 comprises a head 203 and a rod 204 connected with each other, the rod 204 is slidably connected with the valve body 1, the rod 204 can drive the head 203 to reciprocate, the rod 204 also serves as a guide for the head 203, the head 203 can block the first communication port 103, when the gas flows from the gas outlet 102 to the gas inlet 101, under the action of the gas pressure and the force of the elastic member 201 recovering deformation, the head 203 is pressed at the first communication port 103 to block the first communication port 103, and the sealing element 202 is arranged on the head 203 to ensure the sealing of the first communication port 103.

[0043] In the embodiment, the head 203 is in a circular truncated cone structure, the larger-diameter end of the head 203 is connected with the rod 204, the diameter of the larger-diameter end of the head 203 is larger than that of the first communication port 103, the diameter of the smaller-diameter end of the head 203 is smaller than that of the first communication port 103, and the smaller-diameter end of the head 203 can extend into the first communication port 103. The circular truncated cone structure of the head 203 facilitates the blocking of the first communication port 103.

[0044] In other embodiments of the present application, the elastic member 201 is a spring, the elastic member 201 is sleeved on the outside of the rod 204, the installation is convenient, the elastic member 201 determines the pressure difference between the side of the gas inlet 101 and the side of the gas outlet 102, and the replacement of the elastic member 201 can adjust the pressure difference between the adjacent sub-chambers 300a.

[0045] More specifically, the exhaust diaphragm 3 comprises a connecting portion 301 and a diaphragm portion 302 connected together, the connecting portion 301 is detachably connected with the valve body 1, facilitating disassembly and replacement of the exhaust diaphragm 3, the diaphragm portion 302 has a larger diameter than the connecting portion 301, the diaphragm portion 302 can block the second communication port 104, the diaphragm portion 302 is made of flexible material, and the diaphragm portion 302 has a larger diameter than the second communication port 104, when the gas enters from the gas inlet port 101 side, under the action of the gas pressure, the diaphragm portion 302 tightly abuts against the second communication port 104, when the gas enters from the gas outlet port 102 side, the gas can easily push the diaphragm portion 302 to the gas inlet port 101 side through the second communication port 104.

[0046] In addition, the valve body 1 has a positioning groove 105 capable of accommodating the diaphragm portion 302, the positioning groove 105 is arranged near the gas inlet port 101 side, the positioning groove 105 is in communication with the second communication port 104, the diaphragm portion 302 is located in the positioning groove 105, avoiding dislocation of the diaphragm portion 302 under the action of the gas pressure, the end of the positioning groove 105 in communication with the second communication port 104 is an arc surface, the surface of the diaphragm portion 302 facing the second communication port 104 has an arc surface, and the radii of the arc surfaces of the two are inconsistent, when the gas passes through the second communication port 104 from the gas outlet port 102 to the diaphragm portion 302, the abutting area between the diaphragm portion 302 and the top of the positioning groove 105 is small, the gas can easily push the diaphragm portion 302, the energy consumption is very small, and thus the gas can smoothly reach the gas inlet port 101, which is beneficial to the smooth discharge of the gas in the device, and details are shown in the accompanying drawings. Figure 2 .

[0047] Further, the valve body 1 comprises a gas outlet shell 106, an intermediate shell 107 and a gas inlet shell 108 connected in sequence, the gas outlet shell 106 and the gas inlet shell 108 are detachably connected with the intermediate shell 107, the gas outlet port 102 is arranged on the gas outlet shell 106, the gas inlet port 101 is arranged on the gas inlet shell 108, the first communication port 103 and the second communication port 104 are arranged on the intermediate shell 107, the plunger 2 is slidably connected with the gas outlet shell 106, and the exhaust diaphragm 3 is detachably connected with the gas inlet shell 108, the valve body 1 has a split structure, facilitating disassembly, cleaning and maintenance, and replacement of parts, and providing convenience for the operator.

[0048] It should be further noted that the axis of the gas inlet port 101 and the axis of the gas outlet port 102 are located between the axis of the plunger 2 and the axis of the exhaust diaphragm 3, so as to shorten the gas flow path as much as possible, ensure the smooth input and discharge of the gas, and improve the reliability of the device.

[0049] Further, the application further provides an air pressure therapy instrument, comprising the one-way pressure reducing valve 100a, comprising a limb pressure sleeve, the limb pressure sleeve comprises a plurality of groups of parallelly arranged pressure cavities, and the pressure cavities are connected with the air pipe;

[0050] The pressure cavity comprises N+1 sub-chambers 300a, the first sub-chamber 300a is connected with the air pipe through the first branch, the number of the sub-chambers 300a is consistent with the number of the branches and one-to-one correspondence, the N+1 sub-chamber 300a is connected with the N sub-chamber 300a through the N+1 branch, and the one-way pressure reducing valve 100a is arranged between the N+1 sub-chamber 300a and the N sub-chamber 300a, wherein N is greater than or equal to 1.

[0051] The air pressure therapy instrument of the application utilizes the one-way pressure reducing valve 100a, realizes that the pressure of the plurality of sub-chambers 300a of the pressure cavity gradually decreases from the far end to the near end, combines the pressure of the plurality of groups of pressure cavities, realizes that the pressure of the plurality of groups of sub-chambers 300a gradually decreases, solves the problem of limited pipeline connection under the premise of reducing the use cost of the main machine 200a, and enhances the treatment effect of the therapy instrument.

[0052] It should be further pointed out that, although the one-way pressure reducing valve 100a in the application is specifically introduced in the air pressure therapy instrument, the application field of the one-way pressure reducing valve 100a should not be limited to the air pressure therapy instrument, and should not be limited to the medical instrument field, and the one-way pressure reducing valve 100a can be applied to the application occasions of needing to reduce pressure when air is needed and needing to quickly release gas when air is discharged.

[0053] The principle and implementation mode of the application are described by applying specific examples in the application, and the above embodiment is only used to help understand the method and core idea of the application; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the application. In conclusion, the content of the specification should not be understood as the limitation of the application.

Claims

1. A one-way pressure reducing valve characterized by, The valve body has an air inlet, an air outlet, a first communication port and a second communication port, the air inlet can be communicated with the air outlet through the first communication port or the second communication port; A plunger is slidably connected with the valve body, the plunger can block the first communication port, an elastic member is arranged between the plunger and the valve body, and the plunger is arranged on one side of the first communication port close to the air outlet; An exhaust diaphragm can block the second communication port, the exhaust diaphragm is made of flexible material, and the exhaust diaphragm is arranged on one side of the second communication port close to the air inlet; The exhaust diaphragm comprises a connected connecting portion and a diaphragm portion, the connecting portion is detachably connected with the valve body, the diaphragm portion has a larger diameter than the connecting portion, and the diaphragm portion can block the second communication port; the valve body has a positioning groove capable of accommodating the diaphragm portion, the positioning groove is communicated with the second communication port, one end of the positioning groove communicated with the second communication port is an arc surface, and one surface of the diaphragm portion facing the second communication port has an arc surface; the curvature of the arc surface of the positioning groove is inconsistent with the curvature of the arc surface of the diaphragm portion, when gas passes through the second communication port from the air outlet to the diaphragm portion, the area of the abutting part between the diaphragm portion and the top of the positioning groove is small; The valve body comprises an air outlet shell, an intermediate shell and an air inlet shell connected in sequence, the air outlet shell and the air inlet shell are detachably connected with the intermediate shell, the air outlet is arranged on the air outlet shell, the air inlet is arranged on the air inlet shell, the first communication port and the second communication port are arranged on the intermediate shell, the plunger is slidably connected with the air outlet shell, and the exhaust diaphragm is detachably connected with the air inlet shell; The axis of the air inlet and the axis of the air outlet are located between the axis of the plunger and the axis of the exhaust diaphragm. A sealing element is arranged between the plunger and the first communication port.

2. The one-way pressure reducing valve according to claim 1, characterized by: The plunger comprises a head portion and a rod portion connected in sequence, the rod portion is slidably connected with the valve body, and the head portion can block the first communication port.

3. The one-way pressure reducing valve according to claim 1, characterized by: The head portion is in a circular truncated cone structure, the larger-diameter end of the head portion is connected with the rod portion, the diameter of the larger-diameter end of the head portion is larger than the diameter of the first communication port, and the diameter of the smaller-diameter end of the head portion is smaller than the diameter of the first communication port.

4. The one-way pressure reducing valve according to claim 3, characterized in that: The elastic member is a spring, and the elastic member is sleeved on the outside of the rod portion.

5. The one-way pressure reducing valve according to claim 3, characterized in that: The limb pressure sleeve comprises a plurality of groups of parallelly arranged pressure cavities, and the pressure cavities can be connected with a ventilation tube; 6. An air pressure therapy device comprising the one-way pressure relief valve of any one of claims 1-5, wherein: The pressure cavity comprises N+1 sub-chambers, the first sub-chamber is communicated with the ventilation tube through a first branch, the number of the sub-chambers is consistent with and corresponds to the number of the branches, the N+1 sub-chamber is communicated with the N sub-chamber through the N+1 branch, and the N+1 sub-chamber and the N sub-chamber are provided with the one-way pressure relief valve, wherein N is greater than or equal to 1. ​ With the one-way pressure reducing valve, the pressure of the several sub-chambers of the pressure chamber gradually decreases in the direction from the telecentric end to the paracentric end.

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