CN216168431U

CN216168431U - Temperature-adjustable water cushion capable of preventing skin pressure injury and nursing bed

Info

Publication number: CN216168431U
Application number: CN202121516630.6U
Authority: CN
Inventors: 韦天贵; 胡永胜; 陈海洋; 王青梅; 陈秋媛
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2022-04-05
Anticipated expiration: 2031-07-05

Abstract

The utility model discloses a temperature-adjustable water cushion capable of preventing pressure injury of skin and a nursing bed, and relates to the technical field of medical instruments. The water storage device comprises a first support body and a water storage chamber, wherein the first support body is used for supporting a human body and the second support body is composed of a plurality of first water bags arranged at intervals and used for supporting the human body, the first water bags and the second water bags are arranged at intervals in a staggered mode, the water storage chamber is provided with a refrigeration module and a heating module, a first circulation system enabling water to flow between the first circulation system and the first support body in a circulating mode and a first drainage system enabling water in the first support body to drain to the water storage chamber are arranged between the water storage chamber and the second support body, a second circulation system enabling water to flow between the second circulation system and the second support body in a circulating mode and a second drainage system enabling water in the second support body to drain to the water storage chamber are arranged between the water storage chamber and the second circulation system comprise a pressure maintaining device for maintaining water pressure in the first support body and the second support body.

Description

Temperature-adjustable water cushion capable of preventing skin pressure injury and nursing bed

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a temperature-adjustable water cushion and a nursing bed capable of preventing pressure injury of skin.

Background

At present, clinically, a plurality of critical patients need long-time bed-lying treatment due to infection or after major surgery, and fever or hypothermia often occur due to the influence of illness. When the patient lies in bed for a long time, the skin is easily subjected to pressure injury, and meanwhile, the patient needs to be cooled and rewarmed due to low temperature when the patient is heated. At present, an air cushion bed for preventing pressure injury of skin exists in the market, an additional medical instrument (such as an ice blanket machine) is needed when the air cushion bed needs to be cooled or reheated, and a patient needs to be moved to lay an ice blanket or a reheating blanket below the patient body to cool or reheat the patient when the air cushion bed is used, so that great difficulties are caused to the cooling and reheating treatment of the patient who is just finished with major surgery, is cold for the whole body, is critically ill and is not suitable to be moved temporarily. The mode of cooling by ice compress or rewarming by covering the hot compress with a thick cover is not good in clinical effect, and is easy to cause frostbite or scald, thereby being particularly dangerous for critical patients with poor circulation, edema, coma, diabetes and the like.

Therefore, how to manufacture a temperature-adjustable water cushion capable of preventing skin pressure injury, which can prevent the skin pressure injury of a patient and cool and rewarming the patient at the same time, is a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a temperature-adjustable water cushion capable of preventing skin pressure injury, which can prevent the skin pressure injury of a patient and can cool and rewarming the patient.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model provides a temperature-adjustable water cushion capable of preventing pressure injury of skin, which comprises a first support body and a second support body, wherein the first support body is composed of a plurality of first water bags arranged at intervals and used for supporting a human body, the second support body is composed of a plurality of second water bags arranged at intervals and used for supporting the human body, the first water bags and the second water bags are arranged in a staggered manner, the water cushion further comprises a water storage chamber provided with a refrigerating module and a heating module, a first circulating system and a first water discharging system are arranged between the water storage chamber and the first support body, the first circulating system enables water to circularly flow between the water storage chamber and the first support body, the first water discharging system enables water in the first support body to be discharged to the water storage chamber, a second circulating system and a second water discharging system are arranged between the water storage chamber and the second support body, the first circulating system and the second circulating system enable water in the second support body to circularly flow between the water storage chamber, and the first circulating system and the second circulating system are respectively used for keeping the first support body and the second support body in the second support body A hydraulic pressure maintaining device.

Optionally, the first water bag and the second water bag are both arranged in a strip-shaped single structure, and the first water bag and the second water bag are sequentially and alternately arranged in the width direction of the first water bag and the second water bag.

Optionally, the water storage chamber is provided with a first water inlet, a second water inlet, a first water outlet and a second water outlet, the first water bags are connected in series and communicated to form the first support body, the first supporting body is provided with a third water inlet and a third water outlet, the second water bags are communicated in series to form the second supporting body, the second support body is provided with a fourth water inlet and a fourth water outlet, the first circulating system comprises a first water pipe communicated with the first water outlet and the third water inlet and a second water pipe communicated with the third water outlet and the first water inlet, the first water pipe is provided with a pump and a switch valve, the second water pipe is provided with a switch valve and a pressure valve, the first drainage system comprises a third water pipe which is connected to the second water pipe and is communicated with the pressure valve in parallel, and a first switch valve and a pump are arranged on the third water pipe in series; the second circulating system comprises a fourth water pipe communicated with the second water outlet and the fourth water inlet and a fifth water pipe communicated with the fourth water outlet and the second water inlet, a pump and a switch valve are arranged on the fifth water pipe, a switch valve and a pressure valve are arranged on the fourth water pipe, the second drainage system comprises a sixth water pipe connected to the fifth water pipe and communicated with the pressure valve in parallel, and a pump and a switch valve are arranged on the sixth water pipe; the pressure valve is the pressurizer.

Optionally, a first water outlet and a first water inlet are arranged on the water storage chamber, the first water outlet is connected with a first main water pipe, the first main water pipe is connected with a plurality of first branch water pipes, each first branch water pipe is communicated with the corresponding first water bag or the water inlet of the second water bag, the first water inlet is connected with a second main water pipe, the second main water pipe is connected with a plurality of second branch water pipes, each second branch water pipe is communicated with the corresponding first water bag or the water outlet of the second water bag, a pump is arranged on the first main water pipe, a pressure valve and a seventh water pipe which is communicated with the pressure valve in parallel are arranged on the second main water pipe, a switch valve and a pump are communicated with the seventh water pipe in series, switch valves are arranged on the first branch water pipe and the second branch water pipe, and the switch valves arranged on the first main water pipe, the first branch water pipe and the second branch water pipe which are communicated with the first water bag, The second main water pipe, the pressure valve and a pump arranged on the first main water pipe form the first circulating system, and the first main water pipe, the first branch water pipe and the second branch water pipe which are communicated with the second water bag, and the switch valve, the second main water pipe and the pressure valve which are arranged on the first main water pipe form the second circulating system; the second branch water pipe communicated with the first water bag, the switch valve arranged on the second branch water pipe, the second main water pipe, the seventh water pipe, the switch valve arranged on the seventh water pipe and the pump form the first drainage system; the second branch water pipe communicated with the second water bag, the switch valve arranged on the second branch water pipe, the second main water pipe, the seventh water pipe, the switch valve arranged on the seventh water pipe and the pump form a second drainage system; the pressure valve is the pressure maintaining device.

Optionally, the system further comprises a controller, the switch valve is set to be a solenoid valve, and the controller is electrically connected with the solenoid valve and the pump.

Optionally, the air conditioner further comprises an operation screen and a temperature sensor, wherein the operation screen, the temperature sensor, the refrigeration module and the heating module are electrically connected with the controller.

Optionally, the water-saving device further comprises a jacket, and the first water bag and the second water bag are arranged in the jacket.

Optionally, each of the first water bags and each of the second water bags are identical in shape and equal in volume.

A bed board of the nursing bed is provided with any one of the water cushions which can adjust the temperature and prevent the pressure damage of the skin.

Optionally, universal wheels with brake devices are arranged on the supporting legs of the nursing bed.

The technical scheme provided by the utility model can have the following beneficial effects: the utility model comprises a first supporting body which is composed of a plurality of first water bags arranged at intervals and is used for supporting a human body, a second supporting body which is composed of a plurality of second water bags arranged at intervals and is used for supporting the human body, the first water bags and the second water bags are arranged in a staggered manner, the utility model also comprises a water storage chamber which is provided with a refrigeration module and a heating module, a first circulation system which enables water to circularly flow between the water storage chamber and the first supporting body and a first drainage system which enables water in the first supporting body to be drained to the water storage chamber are arranged between the water storage chamber and the second supporting body, a second circulation system which enables water to circularly flow between the water storage chamber and the second supporting body and a second drainage system which enables water in the second supporting body to be drained to the water storage chamber are arranged between the water storage chamber and the second circulation system respectively comprise a pressure maintaining device which maintains the water pressure in the first supporting body and the second supporting body. It can prevent that the patient from taking place skin pressure nature damage, can cool down and rewarming the patient simultaneously.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a temperature adjustable, skin pressure injury prevention water cushion shown in some embodiments;

fig. 2 is a schematic diagram of a temperature-adjustable water cushion capable of preventing pressure injury to skin in other embodiments.

In the figure: 1. a first water bladder; 2. a second water bladder; 3. a water storage chamber; 4. a refrigeration module; 5. a heating module; 7. a first water pipe; 8. a second water pipe; 9. a pump; 10. an on-off valve; 11. a pressure valve; 12. a third water pipe; 13. a fourth water pipe; 14. a fifth water pipe; 15. a sixth water pipe; 16. a first main water pipe; 17. a first water branch pipe; 18. a second main water pipe; 19. a second branch water pipe; 20. a jacket; 21. An operation screen; 22. and a seventh water pipe.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Specifically, "front" and "rear" refer to directions perpendicular to the plane of the paper. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus or methods consistent with certain aspects of the utility model.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the utility model described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the utility model described in the claims.

Referring to fig. 1-2, the present invention provides a temperature-adjustable water cushion capable of preventing pressure injury to skin, comprising a first support body composed of a plurality of first water bags 1 arranged at intervals for supporting a human body and a second support body composed of a plurality of second water bags 2 arranged at intervals for supporting a human body, wherein the first water bags 1 and the second water bags 2 are arranged in a staggered manner (wherein in one form, the first water bags 1 may be arranged in a point-like dispersed manner, the second water bags 2 may also be arranged in a point-like dispersed manner, and each second water bag 2 is dispersed between the first water bags 1, or in other forms, as long as the first water bags 1 form dispersed points for supporting a human body, the second water bags 2 also form dispersed points for supporting a human body, and the supporting points of the first water bags 1 and the supporting points of the second water bags 2 are staggered and do not coincide), and further comprising a water storage chamber 3 provided with a refrigeration module 4 and a heating module 5, a first circulation system for circulating water between the water storage chamber 3 and the first support body and a first drainage system for draining water in the first support body to the water storage chamber 3 are arranged between the water storage chamber 3 and the first support body, a second circulation system for circulating water between the water storage chamber 3 and the second support body and a second drainage system for draining water in the second support body to the water storage chamber 3 are arranged between the water storage chamber 3 and the second support body, and the first circulation system and the second circulation system respectively comprise a pressure maintaining device for maintaining the water pressure in the first support body and the second support body.

When the water-saving support is used, the first support body and the second support body are in an alternate water filling state, for example, the first support body is in a water filling state, the second support body is in a water loss state (the second support body has no water or only a small amount of water), at the moment, the first support body plays a supporting role (the second support body does not play a supporting role) for a human body, as the first water sac 1 is arranged at intervals and is in contact with some dispersion points of human skin to play a supporting role, then the second support body is in the water filling state, the first support body is in the water loss state, at the moment, other dispersion points of the human skin are in contact with the second water sac 2 to play a supporting role. Therefore, when a human body lies on the water cushion, the skin is not always stressed for a long time, but one part of the skin and the other part of the skin are stressed alternately, and the pressure injury of the skin caused by long-time compression can be prevented. Meanwhile, the water bag is adopted to support the human body, so that the water bag is relatively soft and does not easily damage the skin. Secondly, reservoir chamber 3 is provided with refrigeration module 4 and heats module 5, and water circulates between reservoir chamber 3 and first supporter or second supporter, can control the temperature, when the patient needs the cooling, opens refrigeration module 4, cools down the patient, when the patient needs rewarming, will heat module 5 and open, carries out rewarming to the patient.

The specific working principle is as follows: firstly, the first circulating system is opened, the water storage chamber 3 fills water into the first water bag 1, circulation is carried out after the water storage chamber is filled with water, due to the existence of the pressure maintaining device, in the water circulation process, the first water bag 1 has enough pressure for supporting a human body, the second drainage system is closed after the second drainage system is opened to drain water in the second water bag 2 into the water storage chamber 3, and the second water bag 2 is in a water loss state. After a period of time, the second circulating system is opened, the water storage chamber 3 fills the second water bag 2 with water, and the second water bag 2 circulates after being filled with water, because of the existence of the pressure maintaining device, the second water bag 2 has enough pressure for supporting a human body, and the first water discharging system is closed after the first water discharging system is opened to discharge the water in the first water bag 1 into the water storage chamber 3. The refrigerating module 4 and the heating module 5 in the water storage chamber 3 can adjust the temperature of water according to the requirement.

The first water bag 1 and the second water bag 2 are both arranged into a long-strip-shaped single structure, and the first water bag 1 and the second water bag 2 are sequentially arranged in an alternating manner along the width direction. Such as: the arrangement structure that the first water bag 1 is arranged in the first row, the second water bag 2 is arranged in the second row, the first water bag 1 is arranged in the third row, and the second water bag 2 … … is arranged in the fourth row is simple, and when a human body lies on the water bag, the first water bags 1 (or the second water bags 2) arranged at intervals can be fitted with the physiological curve of the human body due to different compression deformation amounts.

Specifically, as shown in fig. 1, the water storage chamber 3 is provided with a first water inlet, a second water inlet, a first water outlet and a second water outlet, each first water bag 1 is connected in series and communicated to form a first support body, the first support body is provided with a third water inlet and a third water outlet, each second water bag 2 is connected in series and communicated to form a second support body, the second support body is provided with a fourth water inlet and a fourth water outlet, the first circulating system comprises a first water pipe 7 communicating the first water outlet and the third water inlet, the second water pipe 8 is communicated with the third water outlet and the first water inlet, the pump 9 and the switch valve 10 are arranged on the first water pipe 7, the switch valve 10 and the pressure valve 11 are arranged on the second water pipe 8, the first drainage system comprises a third water pipe 12 which is connected to the second water pipe 8 and is communicated with the pressure valve 11 in parallel, and the switch valve 10 and the pump 9 are arranged on the third water pipe 12 in series; the second circulating system comprises a fourth water pipe 13 communicated with the second water outlet and the fourth water inlet and a fifth water pipe 14 communicated with the fourth water outlet and the second water inlet, the fourth water pipe 13 is provided with a pump 9 and a switch valve 10, the fifth water pipe 14 is provided with a switch valve 10 and a pressure valve 11, the second drainage system comprises a sixth water pipe 15 connected to the fifth water pipe 14 and communicated with the pressure valve 11 in parallel, and the sixth water pipe 15 is provided with the pump 9 and the switch valve 10; the pressure valve 11 is a pressure maintaining device.

The working principle is as follows: the switch valve 10 on the first water pipe 7 is opened, the pump 9 acts to fill the water in the water storage chamber 3 into the first supporting body, the switch valve 10 on the second water pipe 8 is opened after the water is filled, and the water circulates. This ensures the pressure in the first support during the water circulation. After the switch valve 10 on the fifth water pipe 14 is opened, the switch valve 10 and the pump 9 on the sixth water pipe 15 are opened to fill the water in the second support body into the water storage chamber 3, the two switch valves 10 and the pump 9 are both closed, and the second support body is in a water loss state. After a certain time, the on-off valve 10 and the pump 9 of the fourth water pipe 13 are opened to fill the second support body with water in the water storage chamber 3, and after the second support body is filled, the on-off valve 10 of the fifth water pipe 14 is opened, and water circulates between the second support body and the water storage chamber 3. The switch valve 10 and the pump 9 on the first water pipe 7 are closed, the switch valve 10 and the pump 9 on the third water pipe 12 are opened to pump the water of the first support body to the water storage chamber 3, the switch valve 10 on the second water pipe 8, the switch valve 10 and the pump 9 on the third water pipe 12 are closed, and the first support body is in a water loss state. And then the circulation is carried out, and the first supporting body and the second supporting body alternately support the human body.

Specifically, as shown in fig. 2, a first water outlet and a first water inlet are arranged on the water storage chamber 3, the first water outlet is connected with a first main water pipe 16, the first main water pipe 16 is connected with a plurality of first branch water pipes 17, each first branch water pipe 17 is communicated with the water inlet of the corresponding first water bag 1 or second water bag 2, the first water inlet is connected with a second main water pipe 18, the second main water pipe 18 is connected with a plurality of second branch water pipes 19, each second branch water pipe 19 is communicated with the water outlet of the corresponding first water bag 1 or second water bag 2, a pump 9 is arranged on the first main water pipe 16, a pressure valve 11 and a seventh water pipe 22 which is communicated with the pressure valve 11 in parallel are arranged on the second main water pipe, a switch valve 10 and a pump 9 are communicated on the seventh water pipe 22 in series, switch valves 10 are arranged on the first branch water pipe 17 and the second branch water pipes 19, the first main water pipe 16, the second water pipe 17, the second branch water pipe 19 and the switch valves 10 are arranged on the first main water pipe 16, The first branch water pipe 17 and the second branch water pipe 19 communicated with the first water bag 1, the switch valve 10, the second main water pipe 18 and the pressure valve 11 arranged on the first branch water pipe 16 and the pump 9 arranged on the first main water pipe 16 form a first circulating system, and the first main water pipe 16, the first branch water pipe 17 and the second branch water pipe 19 communicated with the second water bag 2, the switch valve 10, the second main water pipe 18 and the pressure valve 11 arranged on the first main water pipe form a second circulating system; a second branch water pipe 19 communicated with the first water bag 1, a switch valve 10 arranged on the second branch water pipe, a second main water pipe 18, a seventh water pipe 22, a switch valve 10 arranged on the seventh water pipe and a pump 9 form a first drainage system; a second branch water pipe 19 communicated with the second water bag 2, a switch valve 10 arranged on the second branch water pipe, a second main water pipe 18, a seventh water pipe 22, a switch valve 10 arranged on the seventh water pipe and a pump 9 form a second drainage system; the pressure valve 11 is a pressure maintaining device.

The working principle is as follows: the pump 9 on the first main water pipe 16 is opened, the switch valve 10 on the first branch water pipe 17 communicated with the first water bag 1 is opened to fill the first water bag 1 with water, the switch valve 10 on the second branch water pipe 19 communicated with the second water bag 2 is opened, the switch valve 10 and the pump 9 on the seventh water pipe 22 are opened to fill the water in the second water bag 2 into the water storage chamber 3, and then the switch valve 10 on the second branch water pipe 19 and the switch valve 10 and the pump 9 on the seventh water pipe 22 are closed, at this time, the second water bag 2 is in a water loss state. The on-off valve 10 of the second branch pipe 19 communicating with the first water bladder 1 is opened and water starts to circulate between the first water bladder 1 and the water storage chamber 3. Due to the pressure valve 11, the first water bag 1 can maintain enough pressure to support the human body, and the first water bag 1 supports the human body. After a period of time, the switch valve 10 on the first branch water pipe 17 communicated with the second water bag 2 is opened, at the moment, the second water bag 2 is filled with water, after the second water bag is filled with water, the switch valve 10 on the first branch water pipe 17 communicated with the first water bag 1 is closed, the switch valve 10 and the pump 9 on the seventh water pipe 22 are opened, the water in the first water bag 1 is filled into the water storage chamber 3, then the switch valve and the pump 9 on the seventh water pipe 22 are closed, the switch valve 10 on the second branch water pipe 19 communicated with the first water bag 1 is also closed, and at the moment, the first water bag 1 is in a water loss state. Then the switch valve 10 on the second branch water pipe 19 communicated with the second water bag 2 is opened, the water circulates between the water storage chamber 3 and the second water bag 2, and the second water bag 2 supports the human body.

The utility model also comprises a controller, the switch valve 10 is set as an electromagnetic valve, and the controller is electrically connected with the electromagnetic valve and the pump 9. Therefore, the automatic water filling and discharging of the first support body and the second support body can be realized. If the water can be charged and discharged once in 15 minutes.

The utility model also comprises an operation screen 21 and a temperature sensor, wherein the operation screen 21, the temperature sensor refrigerating module 4 and the heating module 5 are electrically connected with the controller. The temperature sensor may be provided in the reservoir 3. Thus, the operation panel 21 can display the real-time water temperature, and parameter settings such as the time interval of water charging and discharging, the water temperature, etc. can be performed through the operation panel 21.

The utility model also comprises a jacket 20, and a first water bag 1 and a second water bag 2 are arranged in the jacket 20.

Each first water bag 1 and each second water bag 2 are identical in shape and equal in volume.

The utility model also provides a nursing bed, and the bed board of the nursing bed is provided with any one of the water cushions.

The supporting legs of the nursing bed are provided with universal wheels with brake devices. The nursing bed can be pushed to move the position of the patient.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations to the above embodiments, which are within the scope of the present invention, may be made by those of ordinary skill in the art.

Claims

1. The water cushion capable of adjusting the temperature and preventing the skin pressure damage is characterized by comprising a first supporting body consisting of a plurality of first water bags (1) arranged at intervals and used for supporting a human body, a second supporting body consisting of a plurality of second water bags (2) arranged at intervals and used for supporting the human body, wherein the first water bags (1) and the second water bags (2) are arranged in a staggered manner, the water cushion also comprises a water storage chamber (3) provided with a refrigerating module (4) and a heating module (5), a first circulating system enabling water to circularly flow between the first water bags and the second water storage system enabling water in the first supporting body to circularly flow to the water storage chamber (3) is arranged between the water storage chamber (3) and the second supporting body, a second circulating system enabling water to circularly flow between the first circulating system and the second water storage system enabling water in the second supporting body to circularly flow to the water storage chamber (3) is arranged between the water storage chamber (3) and the second water drainage system enabling water in the second supporting body to circularly flow to the water storage chamber (3), the first circulation system and the second circulation system each include a pressurizer that maintains water pressure in the first support and the second support.

2. The temperature-adjustable water mattress capable of preventing pressure injury to skin according to claim 1, wherein the first water bag (1) and the second water bag (2) are both provided in a single elongated structure, and the first water bag (1) and the second water bag (2) are alternately arranged in sequence along the width direction thereof.

3. The temperature-adjustable water cushion capable of preventing pressure injury to skin according to claim 2, wherein the water storage chamber (3) is provided with a first water inlet, a second water inlet, a first water outlet and a second water outlet, each of the first water bags (1) is connected in series to form the first support body, the first support body is provided with a third water inlet and a third water outlet, each of the second water bags (2) is connected in series to form the second support body, the second support body is provided with a fourth water inlet and a fourth water outlet, the first circulation system comprises a first water pipe (7) which is connected with the first water outlet and the third water inlet, a second water pipe (8) which is connected with the third water outlet and the first water inlet, the first water pipe (7) is provided with a pump (9) and a switch valve (10), and the second water pipe (8) is provided with a switch valve (10) and a pressure valve (11), the first drainage system comprises a third water pipe (12) which is connected to the second water pipe (8) and is communicated with the pressure valve (11) in parallel, and a switch valve (10) and a pump (9) are arranged on the third water pipe (12) in series; the second circulating system comprises a fourth water pipe (13) communicated with the second water outlet and the fourth water inlet and a fifth water pipe (14) communicated with the fourth water outlet and the second water inlet, a pump (9) and a switch valve (10) are arranged on the fourth water pipe (13), the switch valve (10) and a pressure valve (11) are arranged on the fifth water pipe (14), the second drainage system comprises a sixth water pipe (15) connected to the fifth water pipe (14) and communicated with the pressure valve (11) in parallel, and the pump (9) and the switch valve (10) are arranged on the sixth water pipe (15); the pressure valve (11) is the pressure maintaining device.

4. The temperature-adjustable water cushion capable of preventing pressure injury to skin according to claim 2, wherein a first water outlet and a first water inlet are arranged on the water storage chamber (3), the first water outlet is connected with a first main water pipe (16), the first main water pipe (16) is connected with a plurality of first branch water pipes (17), each first branch water pipe (17) is communicated with the water inlet of the corresponding first water bag (1) or the corresponding second water bag (2), the first water inlet is connected with a second main water pipe (18), the second main water pipe (18) is connected with a plurality of second branch water pipes (19), each second branch water pipe (19) is communicated with the water outlet of the corresponding first water bag (1) or the corresponding second water bag (2), the first main water pipe (16) is provided with a pump (9), the second main water pipe is provided with a pressure valve (11) and a seventh water pipe (22) which is communicated with the pressure valve (11) in parallel, the seventh water pipe (22) is communicated with a switch valve (10) and a pump (9) in series, the switch valves (10) are arranged on the first branch water pipe (17) and the second branch water pipe (19), the first main water pipe (16), the first branch water pipe (17) and the second branch water pipe (19) which are communicated with the first water bag (1), the switch valve (10) arranged on the first main water pipe (16), the second main water pipe (18), the pressure valve (11) and the pump (9) arranged on the first main water pipe (16) form the first circulating system, and the first main water pipe (16), the first branch water pipe (17) and the second branch water pipe (19) which are communicated with the second water bag (2), the switch valve (10) arranged on the first main water pipe (18) and the pressure valve (11) form the second circulating system; a second branch water pipe (19) communicated with the first water bag (1), and a switch valve (10), a second main water pipe (18), a seventh water pipe (22), the switch valve (10) and a pump (9) which are arranged on the second branch water pipe, form the first drainage system; a second branch water pipe (19) communicated with the second water bag (2), and a switch valve (10), a second main water pipe (18), a seventh water pipe (22), the switch valve (10) and a pump (9) which are arranged on the second branch water pipe, form the second drainage system; the pressure valve (11) is the pressure maintaining device.

5. The adjustable-temperature water mattress capable of preventing pressure injury to skin as claimed in claim 3 or 4, further comprising a controller, wherein the switch valve (10) is configured as a solenoid valve, and the controller is electrically connected with the solenoid valve and the pump (9).

6. The adjustable-temperature skin-pressure-injury-prevention water mattress according to claim 5, further comprising an operation screen (21) and a temperature sensor, wherein the operation screen (21), the temperature sensor, the cooling module (4) and the heating module (5) are electrically connected with the controller.

7. The temperature-adjustable water cushion capable of preventing pressure injury to skin according to claim 1, further comprising a jacket (20), wherein the first water bag (1) and the second water bag (2) are arranged in the jacket (20).

8. The temperature-adjustable water mattress capable of preventing pressure injury to skin as claimed in claim 1, wherein each of said first water cells (1) and each of said second water cells (2) have the same shape and volume.

9. A nursing bed, characterized in that the bed board of the nursing bed is provided with the temperature-adjustable water cushion capable of preventing the pressure injury of the skin according to any one of claims 1 to 8.

10. A nursing bed as claimed in claim 9, wherein the legs of the nursing bed are provided with universal wheels with brake devices.