A cold compress bag and a cold compress system thereof

Abstract

This invention discloses a cold compress bag and its cold compress system. The cold compress bag includes: a first outer layer, a middle layer, and a second outer layer. A liquid storage space is defined between the first outer layer and the middle layer, and an air storage space is defined between the second outer layer and the middle layer. The air storage space has an air vent that connects the air storage space to the outside. A partition connects the first outer layer and the middle layer, dividing the liquid storage space into a connected water inlet area and a water outlet area. The water inlet area has an inlet that connects to the outside, and the water outlet area has an outlet that connects to the outside. Air can be injected into the air storage space of the cold compress bag through the air vent, thereby achieving the effect of pneumatic therapy, which is beneficial for preventing venous thrombosis. Through the water inlet and outlet, liquid can sequentially pass through the water inlet area and the water outlet area, circulating between the cold compress bag and the cold compress machine, which is beneficial for uniform and continuous cold compress of the patient's limbs.

Description

Technical Field

[0001] This invention relates to the field of medical technology, and in particular to a cold compress bag and its cold compress system. Background Technology

[0002] Cryotherapy utilizes substances at temperatures below body temperature applied to the skin's surface. Through nerve conduction, it causes vasoconstriction in the skin and internal organs, altering the body's fluid circulation and metabolism to achieve therapeutic effects. In the medical field, cryotherapy, as a physical therapy method, has been widely used to treat various diseases and injuries, reducing local bleeding, alleviating edema, relieving pain, and relieving spasms.

[0003] Postoperatively, patients typically need to rest in bed. Lack of activity can slow venous blood flow in the lower limbs, increasing the risk of thrombosis. Blood loss may occur during surgery, which can stimulate the coagulation system, making blood more prone to clotting and further increasing the risk of thrombosis. While cold compresses in related techniques provide a cooling effect, their effectiveness in preventing postoperative venous thrombosis is minimal. Summary of the Invention

[0004] One objective of this invention is to provide a cold compress bag that, in addition to providing a cold therapy effect, also helps prevent venous thrombosis.

[0005] Another object of the present invention is to provide a cold compress system having the above-mentioned cold compress bag, which, in addition to providing a cold therapy effect, also helps to prevent venous thrombosis.

[0006] To achieve at least one of the above objectives, the technical solution adopted by the present invention is as follows: a cold compress bag, comprising: a first surface layer, an intermediate layer, and a second surface layer, wherein a liquid storage space is defined between the first surface layer and the intermediate layer, and a gas storage space is defined between the second surface layer and the intermediate layer, the gas storage space having a vent, the vent being able to connect the gas storage space and the outside; a partition member, the partition member being able to connect the first surface layer and the intermediate layer, so that the liquid storage space is divided into a connected water inlet area and a water outlet area, the water inlet area having a water inlet being able to connect the water inlet area and the outside, and the water outlet area having a water outlet being able to connect the water outlet area and the outside.

[0007] As a preferred embodiment, the cold compress bag further includes several guide portions that connect the second surface layer and the intermediate layer, thereby dividing the gas storage space into a connected first clamping area, a holding area, and a second clamping area along a first direction.

[0008] As a preferred embodiment, the guide portion connects the first surface layer and the intermediate layer, the guide portion is spaced apart from the outer edge of the cold compress bag to define an outer channel between the guide portion and the outer edge of the cold compress bag, and the guide portion is spaced apart from the partition to define an inner channel between the guide portion and the partition.

[0009] As a preferred embodiment, the partition includes a main partition and a secondary partition. The main partition divides the liquid storage space into an inlet area and an outlet area along a second direction. The secondary partition is connected to the main partition, and the extension direction of the secondary partition is set at an angle to the extension direction of the main partition to define a transition channel on the side away from the inlet and the outlet. The transition channel connects the inlet area and the outlet area.

[0010] As a preferred embodiment, the main partition includes a first section, a transition section, and a second section. The first section and the second section are offset along a second direction. The transition section is curved and extended to connect the first section and the second section, such that at least a portion of the width of the water inlet area gradually increases along the second direction from the side closer to the water inlet to the side farther from the water inlet along the first direction.

[0011] As a preferred embodiment, the secondary partition extends in a curved direction, with the center of curvature of the secondary partition located on the side facing the inlet and the outlet.

[0012] As a preferred embodiment, the guide portion includes a first guide portion and a second guide portion, both of which extend in a curved direction. The centers of curvature of the first guide portion and the second guide portion are both located on the side facing the water inlet and the water outlet. The first guide portion is positioned closer to the water inlet and the water outlet than the second guide portion, and the length of the first guide portion is greater than the length of the second guide portion.

[0013] As a preferred embodiment, the cold compress bag further includes several diversion sections, at least some of which are arranged in an array to divert the liquid within the liquid storage space.

[0014] As a preferred embodiment, the outer edge of the cold compress bag includes multiple smoothly connected arc segments that guide the flow of liquid within the liquid storage space. Each arc segment includes a concave section that curves inward toward the center of the cold compress bag, allowing the concave section to avoid joints when the cold compress bag is strapped to the limb.

[0015] To achieve at least one of the above objectives, the technical solution adopted by the present invention is as follows: a cold compress system, comprising: a cold compress bag as described above; a cold compress machine, the cold compress machine including a housing having a receiving cavity for holding liquid; a lid adapted to cover the housing, the lid including a cover body, an inlet / outlet module, a pressurizing module, and a control module, the cover body having a receiving space for accommodating the inlet / outlet module, the pressurizing module, and the control module; the inlet / outlet module allows the liquid to circulate between the housing and the cold compress bag, so that the cold compress... The device operates in cold therapy mode. The inlet / outlet module allows the liquid in the cold compress bag to drain, thus enabling the device to operate in drainage mode. The pressurization module inflates the cold compress bag, thus enabling the device to operate in pressurization mode. The control module controls the inlet / outlet module and the pressurization module to enable the device to operate in at least one of the pressurization mode, the cold therapy mode, and the drainage mode. A water-guiding structure extends from the cover to the bottom of the housing, connecting the receiving cavity and the inlet / outlet module.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] (1) Through the air vent, air can be filled into the air storage space of the cold compress bag, and then, under the condition that the cold compress bag is tied to the patient's limb, it can play the role of air pressure therapy, which is beneficial to prevent venous thrombosis.

[0018] (2) Through the inlet and outlet, the liquid can pass through the inlet and outlet areas in sequence and circulate between the cold compress bag and the cold compress machine, which is conducive to uniform and continuous cold compress on the patient's limbs. Attached Figure Description

[0019] Figure 1 This is a front view of a cold compress bag according to some embodiments of this application.

[0020] Figure 2 This is a cross-sectional schematic diagram of a cold compress bag according to some embodiments of this application.

[0021] Figure 3 This is a front view of a cold compress bag according to some other embodiments of this application.

[0022] Figure 4 This is a front view of a cold compress bag according to some other embodiments of this application.

[0023] Figure 5 This is a schematic diagram of the back of a cold compress bag according to some embodiments of this application.

[0024] Figure 6 This is a schematic diagram of liquid flow in a cold compress bag according to some embodiments of this application.

[0025] Figure 7 This is a schematic diagram of a cold compress system according to some embodiments of this application.

[0026] Figure 8 This is a three-dimensional structural schematic diagram of a cold compress machine according to some embodiments of this application.

[0027] Figure 9 This is a schematic diagram of the interior of the lid of a cold compress machine according to some embodiments of this application.

[0028] Figure 10 This is a cross-sectional schematic diagram of a cold compress machine according to some embodiments of this application.

[0029] Figure 11 This is a three-dimensional structural diagram of the box cover and water inlet structure according to some embodiments of this application.

[0030] Figure 12 This is a three-dimensional structural diagram of the lower tank cover and the water inlet structure integrally formed according to some embodiments of this application.

[0031] Figure 13 This is a three-dimensional structural schematic diagram of a pipe fitting according to some embodiments of this application.

[0032] In the diagram: 1. Cold compress bag; 11. First surface layer; 12. Middle layer; 13. Second surface layer; 20. Liquid storage space; 21. Water inlet area; 211. Water inlet; 212. Water inlet chamber; 22. Water outlet area; 221. Water outlet; 222. Water outlet chamber; 23. Transition channel; 24. Inner channel; 25. Outer channel; 30. Gas storage space; 31. Vent; 32. First clamping area; 33. Holding area; 34. Second clamping area; 40. Partition; 41. Main partition; 411. First section; 412. Transition section; 413. Second section; 42. Secondary partition; 50. Guide section; 51. First guide section; 52. Second guide section; 60. Diversion section; 70. Outer edge; 71. 72. First convex section; 73. Concave section; 2. Cold compress machine; 80. Box body; 81. Receiving cavity; 82. Outer shell; 83. Inner shell; 84. Space gap; 90. Box cover; 91. Cover body; 911. Upper cover; 912. Lower cover; 913. Receiving space; 92. Inlet and outlet modules; 93. Pressurization module; 94. Control module; 101. Water intake structure; 1011. Main body; 1012. Outer arc part; 1013. Water inlet hole; 1014. Water outlet hole; 201. Pipe fittings; 2011. Plate body; 2012. Main pipe; 2013. Secondary pipe; 2014. Reinforcing rib; 2015. Water intake gap; 301. Filter element; 302. Lighting lamp; 303. Handle. Detailed Implementation

[0033] The present invention will now be further described in conjunction with specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] In the description of this invention, it should be noted that directional terms such as "center," "lateral," "longitudinal," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0035] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0036] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0037] It should be noted that, as used in this application, the terms “basically,” “approximately,” and similar terms are used to indicate approximation rather than degree, and are intended to describe inherent deviations in measured or calculated values ​​that would be recognized by a person skilled in the art.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection, a contact connection, or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] A cold compress bag 1, such as Figures 1-6As shown, it includes: a first surface layer 11, an intermediate layer 12, and a second surface layer 13. A liquid storage space 20 is defined between the first surface layer 11 and the intermediate layer 12, and a gas storage space 30 is defined between the second surface layer 13 and the intermediate layer 12. The gas storage space 30 has a vent 31 that connects the gas storage space 30 to the outside. A partition 40 connects the first surface layer 11 and the intermediate layer 12, so that the liquid storage space 20 is divided into a connected water inlet area 21 and a water outlet area 22. The water inlet area 21 has a water inlet 211 that connects the water inlet area 21 to the outside, and the water outlet area 22 has a water outlet 221 that connects the water outlet area 22 to the outside.

[0040] It is understandable that air can be injected into or expelled from the air storage space 30 of the cold compress bag 1 through the air vent 31. This allows for intermittent pressure application to the patient's limb when the cold compress bag 1 is strapped to the limb, providing pneumatic therapy and helping to prevent venous thrombosis. Furthermore, the water inlet 211 and outlet 221 allow liquid to pass sequentially through the inlet area 21 and outlet area 22, circulating between the cold compress bag 1 and the cold compress machine 2. This facilitates even and continuous cold compresses to the patient's limb, reducing tissue swelling, decreasing bleeding, relieving pain, and alleviating inflammatory responses.

[0041] In some embodiments, such as Figure 5 As shown, the cold compress bag 1 also includes several guide sections 50, which connect the second outer layer 13 and the middle layer 12, so that the gas storage space 30 is divided into a first clamping area 32, a holding area 33 and a second clamping area 34 along a first direction. Specifically, the vent 31 and the holding area 33 are located on opposite sides of the first clamping area 32, so that gas can enter the first clamping area 32, the holding area 33 and the second clamping area 34 sequentially from the vent 31.

[0042] It is understandable that the obstruction of the guide section 50 facilitates the rapid filling of the first clamping area 32 with gas, followed by a slow transition to fill the holding area 33, and then a slow transition to fill the second clamping area 34. In other words, the first clamping area 32, the holding area 33, and the second clamping area 34 bulge sequentially, achieving a gradual increase and decrease in pressure in different zones, thus providing pneumatic therapy to the patient's limb. It is worth noting that if the cold compress bag 1 were filled directly, the limb would be subjected to pressure from multiple directions, which is not conducive to guiding blood circulation. In this embodiment, the cold compress bag 1 achieves the effect of gradual increase and decrease in pressure in different zones, thereby providing a directional impetus to blood circulation and better promoting blood and lymph flow.

[0043] It is worth mentioning that, compared to a fully connected air storage space 30 without a guide section 50, in this embodiment, the guide section 50 allows the first clamping area 32, the holding area 33, and the second clamping area 34 to bulge sequentially, achieving a segmented pressurization effect. This helps simulate natural muscle pump movements and better prevents venous thrombosis. Furthermore, segmented pressurization allows for pressure adjustment based on the patient's specific condition, improving the comfort and effectiveness of pneumatic therapy.

[0044] Furthermore, the guide section 50 enhances the flexibility of the cold compress bag 1. This means the cold compress bag 1 can be bent at the guide section 50, allowing the first clamping area 32, the holding area 33, and the second clamping area 34 to better conform to the patient's limb. This results in more comprehensive and complete coverage, improving comfort and ease of use for medical personnel in securing the cold compress bag 1 to the patient's limb. It is understandable that, under conditions of simultaneous pneumatic and cryotherapy, the better flexibility and coverage of the cold compress bag 1 allow it to better conform to the patient's skin, thereby improving the effectiveness of cryotherapy.

[0045] In some embodiments, such as Figures 1-4 As shown, the guide portion 50 connects the first surface layer 11 and the intermediate layer 12. The guide portion 50 is spaced apart from the outer edge 70 of the cold compress bag 1 to define the outer channel 25 between the guide portion 50 and the outer edge 70 of the cold compress bag 1. The guide portion 50 is spaced apart from the partition member 40 to define the inner channel 24 between the guide portion 50 and the partition member 40. That is, the guide portion 50 connects the first surface layer 11, the intermediate layer 12 and the second surface layer 13. In addition to dividing the gas storage space 30 into a first clamping area 32, a holding area 33 and a second clamping area 34 along the first direction, the guide portion 50 can also divide the water inlet area 21 of the liquid storage space 20 into several interconnected water inlet chambers 212 along the first direction, and divide the water outlet area 22 into several interconnected water outlet chambers 222 along the first direction. It should be understood that the guide portion 50 and the outer edge 70 are spaced apart, so that liquid can flow from the outer channel 25 between the guide portion 50 and the outer edge 70 through each water inlet chamber 212 and each water outlet chamber 222. The guide portion 50 and the partition member 40 are spaced apart, so that liquid can flow from the inner channel 24 between the guide portion 50 and the partition member 40 through each water inlet chamber 212 and each water outlet chamber 222.

[0046] If the guide portion 50 is connected to the outer edge 70, or the guide portion 50 is connected to the partition 40, dead zones and eddies may form at the connection point. In this embodiment, however, the liquid can flow in the outer channel 25 and the inner channel 24, which helps to reduce dead zones and eddies in the liquid storage space 20, and improves the flow efficiency and heat exchange efficiency of the liquid, so that the liquid can circulate more smoothly between the cold compress bag 1 and the cold compress machine 2.

[0047] Furthermore, when it is necessary to drain the liquid, by setting the outer channel 25 and the inner channel 24, the dead corners between the guide part 50, the partition 40 and the outer edge 70 can be reduced, making it easier to pull out the cold compress bag 1. This helps to reduce the liquid residue in the cold compress bag 1, thereby reducing bacterial growth and improving hygiene.

[0048] It is worth mentioning that the first outer layer 11, the middle layer 12, and the second outer layer 13 can all be bent at the guide portion 50, which helps to further improve the bendability and wrapping properties of the cold compress bag 1. In addition, the guide portion 50 also enhances the connection strength between the first outer layer 11, the middle layer 12, and the second outer layer 13, which helps to improve the structural reliability of the cold compress bag 1 and reduce the risk of the edges of the cold compress bag 1 being stretched open by gas or liquid.

[0049] In some embodiments, such as Figures 1-4 As shown, the partition 40 includes a main partition 41 and a secondary partition 42. The main partition 41 divides the liquid storage space 20 into an inlet area 21 and an outlet area 22 along a second direction. The secondary partition 42 is connected to the main partition 41, and its extension direction forms an angle with the extension direction of the main partition 41 to define a transition channel 23 on the side away from the inlet 211 and the outlet 221. The transition channel 23 connects the inlet area 21 and the outlet area 22. It should be understood that the liquid enters the liquid storage space 20 from the inlet 211, flows sequentially through each inlet chamber 212 of the inlet area 21, the transition channel 23, and each outlet chamber 222 of the outlet area 22, and then exits the liquid storage space 20 from the outlet 221. In other words, the liquid can approximately circulate once within the liquid storage space 20.

[0050] Without the partition 40 dividing the liquid storage space 20 into the inlet area 21, the transition channel 23, and the outlet area 22, the liquid might mainly flow on the side closer to the inlet 211 and the outlet 221, while the liquid on the side farther from the inlet 211 and the outlet 221 would have difficulty flowing sufficiently and participating in the circulation between the cold compress bag 1 and the cold compress machine 2. In this embodiment, by setting the partition 40, the liquid can flow more orderly through the inlet area 21, the transition channel 23, and the outlet area 22, so as to approximately circulate once within the liquid storage space 20. This ensures more efficient circulation of the liquid and makes the temperature of the cold compress bag 1 more uniform, reducing the risk of frostbite caused by prolonged low temperature in local areas, and reducing the risk of prolonged high temperature in local areas making effective cold compress difficult. This improves patient comfort and the reliability of the cold therapy effect.

[0051] In at least one embodiment, such as Figures 1-7 As shown, the water inlet 211, water outlet 221, and air vent 31 are located on the same side of the outer edge 70 of the cold compress bag 1. With the water inlet 211, water outlet 221, and air vent 31 connected to the cold compress machine 2 through pipes, it is beneficial to integrate each pipe into the same tubing, so as to connect and conduct with another tubing connected to the cold compress machine 2, thereby improving the convenience of operation.

[0052] It is worth mentioning that, such as Figure 1 As shown, the main partition 41 is positioned close to the centerline of the liquid storage space 20 extending in the first direction, which makes the volume difference between the water inlet area 21 and the water outlet area 22 smaller. Furthermore, the water inlet 211 and the water outlet 221 are located on both sides of the main partition 41, which helps to keep the liquid volume of the water inlet area 21 and the water outlet area 22 uniform, thereby further improving the cooling effect.

[0053] In some embodiments, such as Figure 1 As shown, the main partition 41 includes a first section 411, a transition section 412, and a second section 413. The first section 411 and the second section 413 are offset along a second direction. The transition section 412 is curved and extended to connect the first section 411 and the second section 413, so that at least a portion of the width of the water inlet area 21 gradually increases along the second direction from the side near the water inlet 211 to the side away from the water inlet 211.

[0054] It is understandable that the flow rate and pressure of the liquid as it flows from the cold compress machine 2 to the cold compress bag 1 are relatively high. At least part of the flow channel in the water inlet area 21 widens, allowing the liquid flow rate to decrease after entering the liquid storage space 20. This helps reduce the wear and impact of the liquid on the first surface layer 11, the middle layer 12, and the outer edge 70 of the cold compress bag 1, thereby improving the durability and service life of the cold compress bag 1 and reducing the risk of leakage due to liquid rupture. Furthermore, reducing the flow rate also reduces liquid pressure loss, improves the smoothness of liquid flow, reduces the risk of skin irritation caused by the impact of liquid flow on the cold compress area, and improves patient comfort.

[0055] Furthermore, compared to the transition section 412 extending in a straight line or bending to connect the first section 411 and the second section 413, in this embodiment, the transition section 412 extends in a bent manner, which facilitates a smooth transition between the first section 411 and the second section 413 to guide the liquid flow, and also helps to avoid corners, reduce dead zones, and reduce the obstruction of the main partition 41 to the liquid flow, thereby improving the efficiency of liquid circulation and the efficiency of draining the liquid.

[0056] In at least one embodiment, such as Figure 1 As shown, the transition segment 412 is one or more arc segments. In at least one other embodiment, as... Figure 3 and Figure 4 As shown, the transition segment 412 may be a parabola, a hyperbola, an elliptical arc, a sine curve, an exponential curve, or an irregular curve, etc. This application does not impose specific limitations on this.

[0057] In at least one embodiment, such as Figures 1-4 As shown, the second section 413 is positioned close to the centerline of the cold compress bag 1, which more evenly separates the water inlet area 21 and the water outlet area 22. This helps to stabilize the hydraulic pressure within the liquid storage space 20, thereby making the liquid flow smoother and more stable, which is beneficial to improving the efficiency of liquid circulation and liquid drainage. The first section 411 is positioned biased towards the water inlet area 21 along the second direction. Through the positional difference between the first section 411 and the second section 413 along the second direction, the width of the portion of the water inlet area 21 corresponding to the transition section 412 gradually increases along the second direction from the side closer to the water inlet 211 to the side farther away from the water inlet 211, which is beneficial for pressure relief. It is worth mentioning that, along the first direction, the transition section 412 is located on the side of the cold compress bag 1 with the water inlet 211, which is beneficial for timely pressure relief after the liquid enters the water inlet area 21 of the liquid storage space 20.

[0058] In some embodiments, such as Figures 1-4As shown, the secondary partition 42 extends curvedly along the second direction, with the center of curvature of the secondary partition 42 located on the side facing the inlet 211 and the outlet 221. It should be understood that the secondary partition 42 and the outer edge 70 on the side of the cold compress bag 1 away from the inlet 211 are spaced apart along the first direction, thus forming a transition channel 23 between the secondary partition 42 and the outer edge 70. Compared to the outer edge 70 away from the inlet 211, the secondary partition 42 is positioned closer to the inlet 211, and because it extends along the second direction, it serves to block liquid. That is, liquid in the inlet area 21 must bypass the secondary partition 42 to enter the transition channel 23, such as... Figure 6 As shown by the solid arrow, this helps to prevent liquid from directly impacting the outer edge 70 along the first direction, thereby further reducing the risk of leakage caused by the liquid breaking through the cold compress bag 1.

[0059] Furthermore, the curvature center of the secondary partition 42 is located on the side facing the inlet 211 and the outlet 221. When it is necessary to drain the liquid, the secondary partition 42 can guide the liquid to flow towards the outlet area 22, which helps to prevent the liquid from stagnating in the transition channel 23, thereby improving the efficiency of draining the liquid, reducing the amount of liquid residue in the cold compress bag 1, and helping to reduce bacterial growth.

[0060] In at least one embodiment, such as Figures 1-4 As shown, the secondary partition 42 and the outer edge 70 of the secondary partition 42 opposite to each other in the first direction are arranged parallel or approximately parallel, so that the width of the transition channel 23 between the secondary partition 42 and the outer edge 70 in the first direction is more uniform. This is beneficial for the liquid to flow more smoothly and steadily through the transition channel 23, reducing the generation of turbulence, and further improving the circulation efficiency of the liquid and the efficiency of draining the liquid.

[0061] It is worth mentioning that the main partition 41 extends along the first direction to connect the first surface layer 11 and the intermediate layer 12, and the secondary partition 42 extends along the second direction to connect the first surface layer 11 and the intermediate layer 12, which helps to improve the connection strength between the first surface layer 11 and the intermediate layer 12 and improve the structural reliability of the cold compress bag 1.

[0062] In some embodiments, such as Figure 1 and Figure 5 As shown, the guide portion 50 includes a first guide portion 51 and a second guide portion 52. Both the first guide portion 51 and the second guide portion 52 extend in a curved direction. The curvature centers of the first guide portion 51 and the second guide portion 52 are both located on the side facing the inlet 211 and the outlet 221. The first guide portion 51 is positioned closer to the inlet 211 and the outlet 221 than the second guide portion 52. The length of the first guide portion 51 is greater than the length of the second guide portion 52.

[0063] It should be understood that, compared to the second guide portion 52, the first guide portion 51 is positioned closer to the inlet 211 and outlet 221, and the length of the first guide portion 51 is greater than the length of the second guide portion 52. This allows the width of the outer channel 25 between the first guide portion 51 and the outer edge 70 to be smaller, enabling the first guide portion 51 to withstand more impact force from the liquid along the first direction and to guide the liquid to flow into the inner channel 24 between the first guide portion 51 and the partition member 40. Figure 6 As shown by the solid arrow, the outer channel 25 between the second guide 52 and the outer edge 70 is relatively wide, which helps the liquid to pass through smoothly and steadily.

[0064] Furthermore, the curvature centers of the first guide section 51 and the second guide section 52 are both located on the side facing the inlet 211 and the outlet 221. When liquid needs to be drained, the first guide section 51 and the second guide section 52 can guide the liquid to flow towards the outer channel 25, such as... Figure 6 As shown by the dashed arrow, this facilitates the flow of liquid through the outer channel 25 and the transition channel 23 to the outlet 221, thereby preventing liquid from stagnating in the inner channel 24, the inlet chamber 212, and the outlet chamber 222, thus improving the efficiency of emptying the liquid, reducing the amount of liquid residue in the cold compress bag 1, and helping to reduce bacterial growth.

[0065] In at least one embodiment, such as Figure 1 and Figure 5 As shown, the main partition 41 has a set of first guide portions 51 and second guide portions 52 on both sides along the second direction. From one end near the main partition 41 to the end near the outer edge 70, the first guide portions 51 and the second guide portions 52 are both bent toward the side where the water inlet 211 and the water outlet 221 are located, which helps to guide the liquid to the outer channel 25. When it is necessary to drain the liquid, the risk of the liquid being intercepted by the first guide portions 51 and the second guide portions 52 along the first direction can be further reduced, which helps to further reduce the amount of liquid residue in the cold compress bag 1.

[0066] In some embodiments, such as Figures 1-4 As shown, the cold compress bag 1 also includes several diversion sections 60, at least some of which are arranged in an array to divert the liquid within the liquid storage space 20. It should be understood that without the diversion sections 60, the difference in liquid flow velocity near the center of the liquid storage space 20 compared to that near the outer edge 70, the guide section 50, and the partition 40 would be significant, increasing the likelihood of turbulence. In this embodiment, by providing the diversion sections 60, the friction area between the liquid and the cold compress bag 1 is increased, reducing the velocity difference of the liquid within the liquid storage space 20, which helps to prevent turbulence.

[0067] It is worth mentioning that the several diversion sections 60 connect the first surface layer 11 and the intermediate layer 12, thereby improving the bonding strength between the first surface layer 11 and the intermediate layer 12, enhancing the structural reliability of the cold compress bag 1, and further reducing the thickness of the cold compress bag 1 when filled with liquid, making it easier to roll up and spread out even when filled with liquid. In addition, by providing several diversion sections 60, the flexibility and wrapping properties of the cold compress bag 1 are improved, allowing it to fit more closely to the patient's skin, thus enhancing the effect of cryotherapy.

[0068] In some embodiments, such as Figures 1-6 As shown, the outer edge 70 of the cold compress bag 1 includes multiple smoothly connected arc segments, which guide the flow of liquid within the liquid storage space 20. It should be understood that, compared to a zigzag-extended outer edge 70, the outer edge 70 of this embodiment has multiple smoothly connected arc segments, which helps reduce the resistance of the outer edge 70 to liquid flow, thereby reducing pressure loss and improving the smoothness of liquid flow. Furthermore, the multiple smoothly connected arc segments of the outer edge 70 help reduce dead zones and eddies, reducing the risk of liquid stagnation in dead zones at the corners of the outer edge 70 when liquid needs to be drained, further reducing the amount of liquid residue within the cold compress bag 1.

[0069] In addition, the continuous guiding effect of the outer edge 70 on the liquid flow direction also helps to reduce the impact force of the liquid on the outer edge 70 and makes the stress distribution on the outer edge 70 more uniform, thereby reducing the risk of the cold compress bag 1 being leaked due to the outer edge 70 being broken by the liquid.

[0070] Furthermore, such as Figure 1 As shown, the arc segment includes a concave segment 72, which curves toward the center of the cold compress bag 1. When the cold compress bag 1 is tied to the limb, the concave segment 72 can avoid joints such as elbows, elbow creases, wrists, knees, popliteal fossa, and ankles, which helps to avoid affecting the patient's normal activities, improves the patient's comfort, and is more ergonomic.

[0071] In at least one embodiment, such as Figure 1 As shown, the outer edge 70 also includes a first convex section 71 and a second convex section 73, with a concave section 72 connecting the first convex section 71 and the second convex section 73. Specifically, the outer edge 70 of the cold compress bag 1 has a symmetrical structure along the second direction. The first convex section 71 protrudes and curves away from the center of the cold compress bag 1, which facilitates its cooperation with the transition section 412 of the main partition 41. This allows for timely pressure relief after the liquid enters the water inlet area 21 of the liquid storage space 20, and also helps guide the liquid flow to the outlet 221 to improve drainage efficiency. Figure 6As shown by the solid arrow. The concave section 72 and the holding area 33 of the air storage space 30 are arranged opposite each other in the second direction, thereby avoiding the joint when the cold compress bag 1 is tied to the patient's limb. The second convex section 73 extends in a bend to connect the two concave sections 72. Furthermore, the second convex section 73 and the secondary partition 42 are arranged opposite each other in the first direction, thereby forming a transition channel 23 between the second convex section 73 and the secondary partition 42. It should be understood that the bend of the second convex section 73 facilitates the guidance of liquid from the water inlet area 21 into the transition channel 23 and from the transition channel 23 into the water outlet area 22, improving the smoothness of liquid flow in the liquid storage space 20, thereby improving the liquid circulation efficiency and drainage efficiency.

[0072] In some embodiments, when it is necessary to drain the liquid, the cold compress machine 2 can extract the liquid from the liquid storage space 20, and at the same time, the cold compress machine 2 can inflate the air storage space 30, and squeeze the cold compress bag 1 by pressurizing it to simulate the action of manually squeezing the cold compress bag 1, thereby causing the liquid in the liquid storage space 20 to flow, which is beneficial to allow the liquid to flow back to the cold compress machine 2, thereby further reducing the amount of liquid remaining in the cold compress bag 1.

[0073] It can be understood that when the cold compress machine 2 inflates the air storage space 30, the middle layer 12 and the second surface layer 13 are stretched apart, so that the middle layer 12 can provide a squeezing force toward the first surface layer 11, driving the liquid to flow in the liquid storage space 20. At the same time, the partition 40, the guide 50, the diversion part 60 and the outer edge 70 can provide guidance to the liquid, which helps to avoid the liquid from stagnating in the dead zone, so that the liquid is more fully discharged from the water storage space.

[0074] A cold compress system, such as Figures 7-13 As shown, it includes the aforementioned cold compress bag 1 and the cold compress machine 2.

[0075] like Figures 8-10As shown, the cold compress machine 2 includes a housing 80, a lid 90, and a water inlet structure 101. The housing 80 has a receiving cavity 81 for holding liquid; the lid 90 is adapted to cover the housing 80. The lid 90 includes a cover body 91, an inlet / outlet module 92, a pressurization module 93, and a control module 94. The cover body 91 has a receiving space 913 for accommodating the inlet / outlet module 92, the pressurization module 93, and the control module 94. The inlet / outlet module 92 circulates the liquid between the housing 80 and the cold compress bag 1, enabling the cold compress machine 2 to operate in a cold therapy mode; the inlet / outlet module 92 also draws liquid from the cold compress bag 1, enabling the cold compress machine 2 to operate in a drain mode. The pressurization module 93 inflates the cold compress bag 1, enabling the cold compress machine 2 to operate in a pressurization mode. The control module 94 controls the inlet / outlet module 92 and the pressurization module 93, enabling the cold compress machine 2 to operate in at least one of the pressurization mode, the cold therapy mode, and the drain mode. The water inlet structure 101 extends from the cover 91 to the bottom of the box 80, and the water inlet structure 101 connects the receiving cavity 81 and the inlet and outlet drainage module 92.

[0076] Specifically, the inlet / outlet module 92 is connected to the inlet 211 of the cold compress bag 1 via at least one inlet pipe, so that liquid flows from the cold compress machine 2 to the cold compress bag 1. The inlet / outlet module 92 is connected to the outlet 221 of the cold compress bag 1 via at least one return pipe, so that liquid flows back from the cold compress bag 1 to the cold compress machine 2. The pressurization module 93 is connected to the vent 31 of the cold compress bag 1 via at least one air pipe, so as to inflate the cold compress bag 1 with air.

[0077] It should be understood that the control module 94 and the inlet / outlet module 92 enable the cold compress machine 2 to work in the cold therapy mode. The inlet / outlet module 92 allows the liquid to circulate between the cold compress machine 2 and the cold compress bag 1. The cold compress bag 1 is tied to the patient's limb, thereby cooling the patient's limb and reducing tissue swelling, bleeding, pain, and inflammation.

[0078] Furthermore, through the control module 94 and the pressurization module 93, the cold compress machine 2 can be put into pressurization mode. The pressurization module 93 causes the cold compress bag 1 to inflate and expand. The cold compress bag 1 is then tied to the patient's limb, thereby applying pressure to the limb and playing a role in preventing venous thrombosis and enhancing venous blood flow in the lower limbs.

[0079] Furthermore, through the control module 94 and the inlet / drainage module 92, the cold compress machine 2 can be made to work in the drainage mode. The inlet / drainage module 92 can drain the liquid in the cold compress bag 1, which helps to prevent the liquid from stagnating in the cold compress bag 1, reduce bacterial growth, and improve hygiene.

[0080] It is worth mentioning that, compared to setting a drain outlet on the cold compress bag 1 to manually drain the liquid inside the cold compress bag 1, in this embodiment, the liquid inside the cold compress bag 1 is drained using the inlet and outlet module 92, which helps to reduce the workload of medical staff and makes it easier for patients to operate on their own; and it also helps to avoid setting a drain outlet on the cold compress bag 1, thereby improving the sealing performance of the cold compress bag 1.

[0081] In some embodiments, when the cold compress machine 2 is operating in drainage mode, the pressurization module 93 can inflate the cold compress bag 1 to compress the cold compress bag 1, which helps to allow the liquid to flow back to the cold compress machine 2, thereby further reducing the amount of liquid remaining in the cold compress bag 1.

[0082] In at least one embodiment, in the early stage of the drainage mode, only the inlet and outlet drainage module 92 works to allow the liquid in the cold compress bag 1 to be discharged more quickly; in the later stage of the drainage mode, the inlet and outlet drainage module 92 and the pressurization module 93 work simultaneously, so that the pressurization module 93 can inflate the cold compress bag 1, which helps to squeeze the liquid in the cold compress bag 1 toward the return pipe and improve the drainage efficiency.

[0083] In some embodiments, such as Figures 10-12 As shown, along the extending direction of the water-guiding structure 101, the water-guiding structure 101 is conical in shape, wider at the top and narrower at the bottom. This facilitates the sliding off of water droplets remaining on the surface of the water-guiding structure 101, reducing water stains and scale residue on the surface of the water-guiding structure 101, and improving the hygiene of the cold compress machine 2. In addition, the conical structure, wider at the top and narrower at the bottom, is easy to clean. It should be understood that, compared to a straight cylindrical water-guiding structure 101, the water-guiding structure 101 in this embodiment allows cleaning tools to be inserted more easily, which is conducive to cleaning the water-guiding structure 101 more conveniently and thoroughly.

[0084] In some embodiments, such as Figures 10-12 As shown, the water-guiding structure 101 includes a main body 1011 and multiple outer arc-shaped portions 1012. The outer arc-shaped portions 1012 surround the outer periphery of the main body 1011 and protrude radially from the main body 1011, giving the water-guiding structure 101 a conical shape that is larger at the top and smaller at the bottom. It should be understood that the angle between the arc surface at the junction of the outer arc-shaped portion 1012 and the main body 1011 and the horizontal plane is small, thus facilitating water droplets to drip directly from the end of the outer arc-shaped portion 1012, further reducing water stains and scale residue on the surface of the water-guiding structure 101. Furthermore, the radial dimension of the outer arc-shaped portion 1012 is larger than that of the main body 1011, which helps to improve the structural strength of the water-guiding structure 101. It is worth mentioning that the combination of multiple main body portions 1011 and multiple outer arc-shaped portions 1012 allows the water-guiding structure 101 to approximate an iceberg shape, which helps to improve the aesthetics of the water-guiding structure 101.

[0085] In at least one embodiment, the plurality of outer arc portions 1012 are irregularly shaped, and the outer arc portions 1012 are not entirely the same. In at least one other embodiment, the outer arc portion 1012 is an ellipsoid, or an elliptic parabola, or a single-leaf hyperboloid, or a double-leaf hyperboloid, etc., which is not specifically configured in this application.

[0086] In some embodiments, such as Figure 11 and Figure 12 As shown, the water intake structure 101 has a plurality of water inlets 1013 and at least one water outlet 1014. The water inlets 1013 are located at the end of the water intake structure 101 and are positioned opposite to the bottom of the housing 80. The water inlets 1013 allow the liquid in the receiving cavity 81 to enter the water inlet / drainage module 92. The water outlet 1014 is located above the water inlets 1013 and allows the liquid in the water inlet / drainage module 92 to be discharged into the receiving cavity 81.

[0087] In other words, the water inlet 1013 is located near the bottom of the housing 80, allowing the inlet / outlet module 92 to draw liquid from the bottom of the receiving cavity 81 into the cooling bag 1. The water outlet 1014 is located above the water inlet 1013, either near the housing cover 90 or near the liquid surface, allowing the liquid discharged from the cooling bag 1 to flow to the upper layer of the receiving cavity 81, i.e., to the liquid surface or near the liquid surface. It should be understood that the liquid drawn into the cooling bag 1 is at a lower temperature, while the liquid discharged from the cooling bag 1 is at a higher temperature. Flowing the discharged liquid to the liquid surface helps to slow down the heat transfer of the higher-temperature liquid to the liquid near the bottom of the receiving cavity 81, thus helping to maintain a lower temperature for the liquid at the bottom of the receiving cavity 81.

[0088] In some embodiments, such as Figure 10 As shown, the distance H from the end of the water inlet structure 101 to the bottom of the housing 80 is less than 5 cm. It should be understood that the water inlet 1013 is located at the end of the water inlet structure 101, meaning the water inlet 1013 is close to the bottom of the housing 80. It should be understood that the water pressure near the bottom of the housing 80 is higher than near the water surface, which is beneficial for improving water absorption efficiency. Furthermore, it reduces disturbance to the water surface during absorption, facilitating a more stable absorption of water into the cold compress bag 1. It is worth mentioning that the location of the water inlet 1013 near the bottom of the housing 80 also helps to prevent air from being drawn into the cold compress bag 1, further improving the reliability of the cold compress machine 2 and the cold compress bag 1 during use.

[0089] Preferably, the distance H from the end of the water-diverting structure 101 to the bottom of the tank 80 is less than 3 cm. More preferably, the distance H from the end of the water-diverting structure 101 to the bottom of the tank 80 is less than or equal to 1 cm.

[0090] In some embodiments, such as Figure 10As shown, the cover 91 includes an upper cover 911 and a lower cover 912 adapted to be interlocked, forming an accommodating space 913 between the upper cover 911 and the lower cover 912 to accommodate the inlet / outlet drainage module 92, the pressurization module 93, and the control module 94. Furthermore, the water inlet structure 101 is integrally formed on the lower cover 912, which helps to reduce the number of parts, lower manufacturing costs, and also helps to improve the sealing between the water inlet structure 101 and the lower cover 912, thereby reducing the risk of water ingress into the various modules in the cover 91, and thus improving the reliability and safety of the cold compress machine 2.

[0091] In some embodiments, such as Figure 10 and Figure 13 As shown, the cold compress machine 2 also includes a pipe fitting 201, which is disposed within the water inlet structure 101. The pipe fitting 201 includes a plate 2011, a main pipe 2012, and a secondary pipe 2013. The plate 2011 is sealed to the water inlet structure 101, defining a water inlet gap 2015 between the pipe fitting 201 and the sealing structure. The main pipe 2012 extends from the plate 2011 toward the end of the water inlet structure 101, connecting the water inlet gap 2015 and the inlet / outlet module 92, allowing liquid to enter the inlet / outlet module 92. The secondary pipe 2013 is located above the main pipe 2012, extending from the plate 2011 toward the side wall of the water inlet structure 101, connecting the water inlet gap 2015 and the inlet / outlet module 92, allowing liquid to be discharged into the receiving cavity 81.

[0092] It should be understood that, under the action of the inlet and outlet module 92, the liquid in the receiving cavity 81 enters the cold compress bag 1 through the inlet hole 1013 of the water inlet structure 101, the water inlet gap 2015, the main pipe 2012 of the pipe fitting 201, and the inlet pipe in sequence, and flows back to the receiving cavity 81 through the return pipe of the pipe fitting 201, the secondary pipe 2013, the water inlet gap 2015, and the outlet hole 1014 of the water inlet structure 101 in sequence.

[0093] In at least one embodiment, such as Figure 10 As shown, the plate 2011 is fixed to the lower cover 912, and a sealing element is provided between the plate 2011 and the lower cover 912 to seal the connection between the pipe fitting 201 and the lower cover 912.

[0094] In at least one embodiment, such as Figure 10 and Figure 13 As shown, the pipe fitting 201 also includes several reinforcing ribs 2014, which connect the plate 2011 and the main pipe 2012, thereby improving the structural strength of the pipe fitting 201.

[0095] In at least one embodiment, the secondary pipe 2013 is arranged opposite to the water outlet 1014 of the water intake structure 101, which facilitates the water discharged from the cold compress bag 1 to enter the receiving cavity 81 through the water outlet 1014.

[0096] In some embodiments, such as Figure 10 As shown, the cold compress machine 2 also includes a filter element 301, which is installed on the main pipe 2012 to filter impurities. This helps to prevent impurities from entering the inlet / outlet module 92 and the cold compress bag 1, thereby improving the reliability of the cold compress machine 2 and extending the service life of the components of the inlet / outlet module 92, such as the pump body and valve body.

[0097] In some embodiments, the pressurization module 93 includes an inflation / deflation assembly and a pressure sensor. The inflation / deflation assembly inflates the cold compress bag 1 and deflates the air inside the cold compress bag 1. The pressure sensor senses the air pressure inside the cold compress bag 1. It should be understood that through the combined action of the inflation / deflation assembly and the pressure sensor, the cold compress bag 1 can generate intermittent pressure applied to the limb to simulate the vascular pressure during natural movement. For example, when the cold compress bag 1 is strapped to the patient's calf, the intermittent pressure generated by the cold compress bag 1 can simulate the vascular pressure during natural walking, which is beneficial for massaging muscles and preventing venous thrombosis. It is worth mentioning that by sensing the pressure inside the cold compress bag 1 through the pressure sensor, and then adjusting the operation of the inflation / deflation assembly, the pressure can be controlled more precisely. This helps to avoid excessive pressure leading to ischemia and hypoxia, and also helps to avoid insufficient pressure that would not achieve the therapeutic effect.

[0098] In at least one embodiment, the pressurization module 93 can control the pressure to be between 35 mmHg and 40 mmHg.

[0099] In at least one embodiment, the inflation / deflation assembly includes an air pump and a solenoid valve. The air pump inflates the cold compress bag 1. The solenoid valve displaces the gas from the cold compress bag 1.

[0100] In some embodiments, the inlet / outlet module 92 includes a water pump and a valve body. The water pump circulates liquid between the cold compress machine 2 and the cold compress bag 1. The valve body blocks water from entering the cold compress bag 1, causing the water pump to draw liquid from the cold compress bag 1, thus enabling the cold compress machine 2 to operate in drainage mode. In other words, the inlet / outlet module 92 drains the liquid from the cold compress bag 1 by extraction. It should be understood that other methods can also be used to drain the liquid from the cold compress bag 1, and this application does not impose specific limitations on this.

[0101] In some embodiments, such as Figure 10As shown, the housing 80 includes an outer shell 82 and an inner shell 83. The outer shell 82 is fitted around the outer periphery of the inner shell 83, defining a space gap 84 between the outer shell 82 and the inner shell 83. It should be understood that the spaced outer shell 82 and inner shell 83 serve as heat insulation, which helps to reduce the heat exchange between the ice-water mixture inside the housing 80 and the outside environment, thereby allowing the ice-water mixture inside the housing 80 to remain within the range of an ice-water ratio of 1:1.4 to 1:2.5 for a longer period of time.

[0102] In at least one embodiment, such as Figure 10 and Figure 12 As shown, a vacuum is drawn inside the space gap 84. In at least one other embodiment, the space gap 84 is filled with an inert gas, air, or gel, etc., and this application does not impose specific limitations on this.

[0103] In some embodiments, the outer shell 82 and inner shell 83 of the housing 80 are made of transparent material, and the cooling machine 2 also includes a light 302 to illuminate the receiving cavity 81 of the housing 80 so as to observe the ice-water mixture inside the housing 80 in a darker environment.

[0104] In at least one embodiment, the lighting 302 can change color according to different working modes so that the user can quickly distinguish the working mode of the cold compress machine 2.

[0105] In some embodiments, such as Figures 8-11 As shown, the cold compress machine 2 also includes a handle 303, which is rotatably connected to the housing 80 or the cover 90 to facilitate moving and transporting the cold compress machine 2.

[0106] The basic principles, main features, and advantages of this invention have been described above. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection claimed by this invention is defined by the appended claims and their equivalents.

Claims

1. A cold compress bag, characterized in that, include: A first surface layer, an intermediate layer, and a second surface layer are defined. A liquid storage space is defined between the first surface layer and the intermediate layer, and a gas storage space is defined between the second surface layer and the intermediate layer. The gas storage space has a vent that connects the gas storage space to the outside. A partition is provided to connect the first surface layer and the intermediate layer, thereby dividing the liquid storage space into a connected inlet area and an outlet area. The inlet area has an inlet that connects to the outside, and the outlet area has an outlet that connects to the outside. The partition includes a main partition and a secondary partition. The main partition divides the liquid storage space into an inlet area and an outlet area along a second direction. The secondary partition is connected to the main partition. The extension direction of the secondary partition is at an angle to the extension direction of the main partition. The secondary partition extends in a curved manner along the second direction to define a transition channel on the side away from the inlet and the outlet. The transition channel connects the inlet area and the outlet area. The cold compress bag also includes several guide portions, which connect the second surface layer and the intermediate layer, so that the gas storage space is divided into a connected first clamping area, a holding area and a second clamping area along the first direction; The guide portion connects the first surface layer and the intermediate layer. The guide portion is spaced apart from the outer edge of the cold compress bag to define an outer channel between the guide portion and the outer edge of the cold compress bag. The guide portion is spaced apart from the partition to define an inner channel between the guide portion and the partition. The cold compress bag can be bent at the guide portion.

2. The cold compress bag according to claim 1, characterized in that, The main partition includes a first section, a transition section, and a second section. The first section and the second section are offset along a second direction. The transition section is curved and extended to connect the first section and the second section, such that at least a portion of the width of the water inlet area gradually increases along the second direction from the side closer to the water inlet to the side farther from the water inlet along the first direction.

3. The cold compress bag according to claim 1, characterized in that, The center of curvature of the secondary partition is located on the side facing the inlet and the outlet.

4. The cold compress bag according to claim 1, characterized in that, The guide portion includes a first guide portion and a second guide portion. Both the first guide portion and the second guide portion extend in a curved direction. The center of curvature of both the first guide portion and the second guide portion is located on the side facing the water inlet and the water outlet. The first guide portion is positioned closer to the water inlet and the water outlet than the second guide portion. The length of the first guide portion is greater than the length of the second guide portion.

5. The cold compress bag according to any one of claims 1-3, characterized in that, The cold compress bag also includes several diversion sections, at least some of which are arranged in an array to divert the liquid in the storage space.

6. The cold compress bag according to any one of claims 1-3, characterized in that, The outer edge of the cold compress bag includes multiple smoothly connected arc segments that guide the flow of liquid in the liquid storage space. Each arc segment includes a concave section that curves inward toward the center of the cold compress bag. When the cold compress bag is tied to a limb, the concave section avoids joints.

7. A cold compress system, characterized in that, include: The cold compress bag as described in any one of claims 1-6; A cold compress machine includes a housing with a cavity for holding liquid; a lid adapted to cover the housing, the lid including a cover body, an inlet / drainage module, a pressurization module, and a control module; the cover body having a accommodating space for accommodating the inlet / drainage module, the pressurization module, and the control module; the inlet / drainage module circulates the liquid between the housing and the cold compress bag to operate the cold compress machine in a cold therapy mode, and drains the liquid from the cold compress bag to operate the cold compress machine in a drainage mode; the pressurization module inflates the cold compress bag to operate the cold compress machine in a pressurization mode; the control module controls the inlet / drainage module and the pressurization module to operate the cold compress machine in at least one of the pressurization mode, the cold therapy mode, and the drainage mode; and a water-guiding structure extending from the cover body to the bottom of the housing, connecting the cavity and the inlet / drainage module.

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