Mattress capable of preventing pressure sores

[0014] The present invention will be described in detail below with reference to the drawings, such as figure 1 Shown: a pressure sore-proof mattress, comprising a mattress body 1, the upper surface of the mattress body is provided with a bladder 2 made of rubber material, the inner wall of the bladder is provided with a waterproof and breathable material film 3, the bladder The body is filled with water 4, the wall of the capsule body is provided with vents 5, a self-excited oscillating flow heat pipe that is repeatedly bent is arranged near the upper surface of the mattress body, and an evaporator 7 is provided on one side of the self-excited oscillating flow heat pipe. A condenser 8 is arranged on the other side, and a plurality of cavity-type grid frames 9 are arranged in the self-excited oscillating flow heat pipe along the extension direction of the pipeline, and fixed particles 10 (millimeter or micrometer level) are arranged in the grid frame. The anti-pressure sore mattress of this structure, on the one hand, water has a cooling effect on the human body, and at the same time, the patient lies on the capsule. As the patient turns over and other activities, the capsule will be in the alternate transformation of shrinking and expanding. Accelerating the convection of water not only makes the heat dissipation uniform, but also improves the heat dissipation efficiency. In addition, the water flow can give appropriate impact to the compressed tissue and improve the effect of promoting blood circulation and dredging collaterals; on the other hand, the patient lies on the capsule and self-excited oscillation The working medium is encapsulated in the flow heat pipe. The working medium forms a plunger between the liquid and vapor phases in the pipe. At the evaporator end, the working medium is heated, which causes the bubble to expand and pushes the liquid-vapor plunger to flow to the condenser. The convective heat transfer process between the two-phase fluid in the steady-state phase transition process and the wall of the self-excited oscillating flow heat pipe can ensure the heat dissipation effect; due to the staggered distribution of the liquid-vapor plunger, it can produce strong reciprocating oscillation. , Oscillation can cause the capsule body to oscillate, massage the patient’s body, weaken the pressure state, and promote the blood circulation and collaterals of the compressed tissue. On the other hand, the oscillation can make the convective heat transfer process greatly strengthened by the action of severe pulsating flow. In addition, when the liquid phase working medium flows through the grid, the interaction and collision between the solid particles and the solid particles, between the solid particles and the liquid, and between the solid particles and the self-excited oscillating flow heat pipe make the liquid cross-sectional velocity distribution flat. The laminar flow bottom layer is reduced, the flow turbulence intensity is enhanced, and the heat conduction and heat dissipation capabilities are further improved. In addition, compared to adding solid particles directly to the liquid phase working medium, under the limit of the grid, the solid particles can be effectively prevented from being subjected to static Electricity, Brown's force, etc. accumulate together to cause wear and blockage. Therefore, the anti-pressure sore mattress of this structure has the advantages of simple structure, low cost, and good heat dissipation and massage functions.

[0015] As a further improvement of the above technical solution, a heating wire 11 is provided in the capsule. In winter or when the temperature is low, the water in the capsule is heated by the heating wire to keep it warm in winter and cool in summer.

[0016] As a further improvement of the above technical solution, the self-excited oscillating flow heat pipe includes a thick tube body 61 and a thin tube body 62 that are alternately connected. In this way, a self-excited oscillating flow heat pipe with a non-uniform cross-section is formed, so that the fluid in the pipe expands rapidly along the thick tube body after being heated at the evaporator end, and flows to the condenser, and flows back to the evaporator end along the thin tube body after condensing at the condenser end. This effectively improves the circulating power of the working medium and improves the heat dissipation capacity.

[0017] As a further improvement of the above technical solution, a valve 12 is provided on the capsule body, and water can be injected into the capsule body or discharged from the capsule body through the valve.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be implemented Modifications or equivalent replacements without departing from the purpose and scope of the technical solution of the present invention should be covered by the scope of the claims of the present invention.