In-shoe constant-temperature structure for shoe

Abstract

Disclosed in the present invention is an in-shoe constant-temperature structure for a shoe. The in-shoe constant-temperature structure comprises: an air pressure bag, an air storage bag, a vortex tube and a phase-change material bag, wherein an air intake tube is connected to the air pressure bag, an air outlet of the air pressure bag is connected to an air inlet of the air storage bag by means of a first guide tube, and an air outlet of the air storage bag is connected to an air inlet of the vortex tube by means of a second guide tube; one end of the vortex tube is in communication with the outside of a shoe, and the other end of the vortex tube is connected to a third guide tube; a pit is provided on the top of the phase-change material bag, and a box is mounted in the pit; a vertical partition plate is provided in the box, and the vertical partition plate divides an inner cavity of the box into a front cavity and a rear cavity; and a transverse partition plate is provided in the front cavity, the third guide tube is connected to a right wall of a front lower cavity, an exhaust hole is provided in a top wall of a front upper cavity, an air intake hole is provided in a top wall of the rear cavity, and an air intake end of the air intake tube is in communication with the rear cavity. The structure is capable of cooling or heating the interior of a shoe, is less affected by the external ambient temperature and not affected by the capacitance, is not easy to damage, and is low in terms of cost and suitable for mass production.

Description

A constant temperature structure inside a shoe Technical Field

[0001] The present invention relates to the technical field of shoes, and in particular to a constant temperature structure inside a shoe. Background Art

[0002] Currently, shoe insoles primarily dissipate heat by dissipating heat generated by the soles of the feet through various holes to the outside of the shoe. However, this cooling method is inefficient. The speed at which the soles of the feet can be lowered to room temperature depends primarily on the number and area of ​​the holes in the insole. Furthermore, the transfer of heat from the soles of the feet to the outside of the shoe requires a high ambient temperature.

[0003] Electric heating and cooling sheets are also used to heat and cool shoes. However, this method is easily affected by the capacitance, cannot be used for a long time, and is easily damaged, resulting in failure of the heating or cooling function of the shoes. Summary of the Invention

[0004] In response to the defects in the prior art, the present invention provides a constant temperature structure inside a shoe. This structure can dissipate heat or heat the inside of the shoe, is less affected by the external ambient temperature, is not affected by the capacitance, is not easy to damage, has low cost, and is suitable for mass production.

[0005] A constant temperature structure inside a shoe comprises an air pressure bag, an air storage bag, a vortex tube and a phase change material bag, wherein the air pressure bag is connected to an air inlet pipe, a first one-way valve is provided in the air inlet pipe, an air outlet of the air pressure bag is connected to an air inlet of the air storage bag via a first conduit, and an air outlet of the air storage bag is connected to an air inlet of the vortex tube via a second conduit, a second one-way valve is provided at the air inlet of the air storage bag, the aperture of the air storage bag air inlet is larger than the aperture of the air storage bag outlet, one end of the vortex tube is connected to the outside of the shoe, and the other end of the vortex tube is connected to a third conduit, the phase change material bag is filled with a phase change material, and the gas discharged from the third conduit can undergo a phase change reaction with the phase change material before being discharged into the shoe.

[0006] Preferably, the phase change material bag has a pit on the top, and a box is installed in the pit. The front and rear sides of the box are open, and a vertical partition is provided in the box, which divides the inner cavity of the box into a front cavity and a rear cavity. A horizontal partition is provided in the front cavity, which divides the front cavity into a front upper cavity and a front lower cavity. The third duct is connected to the right wall of the front lower cavity, and the left walls of the front lower cavity and the front upper cavity are both provided with connecting holes. The two connecting holes are connected by a connecting pipe, the top wall of the front upper cavity is provided with an exhaust hole, and the top wall of the rear cavity is provided with an air inlet hole, and the air inlet end of the air inlet pipe is connected to the rear cavity.

[0007] Preferably, a spring is connected between the inner top wall and the inner bottom wall of the air pressure bag.

[0008] Preferably, the cold end of the vortex tube is connected to the right wall of the front lower cavity of the box through a third conduit, the hot end of the vortex tube is connected to the outside of the shoe, and the phase change temperature of the phase change material in the phase change material bag is lower than 34 degrees.

[0009] Preferably, the hot end of the vortex tube is connected to the right wall of the front lower cavity of the box through a third conduit, the cold end of the vortex tube is connected to the outside of the shoe, and the phase change temperature of the phase change material in the phase change material bag is higher than 34 degrees.

[0010] Preferably, it further comprises a base plate and a pedal board, wherein the front end of the pedal board is hinged to the front end of the base plate, and the air pressure bag is placed between the base plate and the pedal board.

[0011] Preferably, the air storage bag is connected to a pressure relief pipe, and a pressure relief valve is provided in the pressure relief pipe.

[0012] Preferably, the pressure relief valve includes a fixed plate, a first spring and a sealing plate. The fixed plate is installed in the pressure relief pipe. A pressure relief port is opened on the side wall of the pressure relief pipe. The pressure relief port is connected to the outside of the shoe. The pressure relief port is located between the fixed plate and the sealing plate. The two ends of the first spring are respectively connected to the fixed plate and the sealing plate.

[0013] Preferably, the sealing plate is connected with a connecting column, and the connecting column movably passes through the fixed plate.

[0014] The beneficial effects of the present invention are reflected in that: through the cooperation of various components in the technical solution, when the pedal is stepped on, the pedaling pressure amplifies the pedaling force due to the lever principle of the pedal and is then transmitted to the air pressure bag, which can enable the air pressure bag to overcome the internal spring elastic force and the pressure inside the air storage bag and then be compressed. After compression, the gas in the air pressure bag enters the air storage bag, forming gas pressure in the air storage bag. When the gas pressure in the air storage bag meets the working conditions of the vortex tube refrigeration, the air pressure entering the vortex tube makes the vortex tube work. The cold end or the hot end of the vortex tube is connected to the right wall of the front lower cavity of the box through the third conduit. When the cold end is connected to the third conduit, and the phase change material in the phase change material bag is set to be lower than 34 degrees, the vortex tube discharges cold air through the phase change material bag. When the cold air temperature is lower than the phase change temperature of the phase change material in the phase change material bag, the phase change material in the phase change material bag reacts with the cold air and heats up to the temperature of the phase change material, and then is discharged into the shoe, thereby cooling the shoe. When the pedal loses pressure, the spring inside the air bag returns to its original position, pushing the pedal back up. Simultaneously, the check valve on the air bag's inlet opens, allowing some of the gas from the sole of the foot to enter the box through the inlet hole in the top wall of the rear chamber. Some of this gas reacts with the phase-change material in the PCM capsule, cooling to near the material's transition temperature. It then flows back into the air bag through the intake pipe connected to the rear chamber. Condensation from this gas, caused by the temperature difference, creates water vapor that eventually flows through the hot end of the vortex tube and exits the shoe. The remaining gas continues to circulate. The phase-change material maintains its phase-change properties by releasing and absorbing heat during this cycle.

[0015] When the hot end is connected to the third conduit, and the phase change material in the phase change material capsule is set to above 34 degrees, the vortex tube discharges hot air through the phase change material capsule. When the hot air temperature is higher than the phase change temperature of the phase change material in the phase change material capsule, the phase change material in the phase change material capsule reacts with the hot air and cools down to the temperature of the phase change material before being discharged into the shoe. The discharged hot air heats up the inside of the shoe. When the pedal is unable to apply pressure, the spring in the air pressure bag recovers, and the pedal is lifted up by the spring in the air pressure bag and returned to its original position. At the same time, the one-way valve on the air pressure bag opens. At this time, some of the gas under the sole of the foot enters the box through the air inlet hole on the top wall of the rear chamber and partially reacts with the phase change material in the phase change material capsule, heating it to near the phase change temperature of the phase change material. It then flows into the air pressure bag through the air intake pipe connected to the rear chamber. The cycle continues. The phase change material releases and absorbs heat in this cycle to maintain its phase change characteristics.

[0016] When the pressure in the air bag is greater than or equal to the downward force on the pedal, the pedal will not move downward, giving the feeling that the shoe is pressing against the foot. At this time, the pressure relief valve on the air bag will open, releasing the excess pressure in the air bag to the outside of the shoe.

[0017] This method of regulating the temperature inside the shoe is less affected by the external environment and, unlike electric heaters or cooling plates, is not affected by battery capacity and is recyclable. A single mold can produce shoes with both functions. By incorporating phase-change material sacs, the uneven temperature of the gas discharged from the vortex tubes can be adjusted, achieving balanced and continuous cooling or heating inside the shoe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0019] FIG1 is a schematic diagram of the overall structure of the present invention;

[0020] FIG2 is a schematic diagram of the internal structure of the air pressure bag in the present invention;

[0021] FIG3 is a schematic diagram of the overall structure of the air storage bag of the present invention;

[0022] FIG4 is a schematic diagram of the overall structure of the right side of the housing mounted on the phase change material capsule of the present invention;

[0023] FIG5 is a schematic diagram of the overall structure of the right side of the phase change material capsule in the present invention;

[0024] FIG6 is a schematic diagram of the overall structure of the front side of the box body of the present invention;

[0025] FIG7 is a schematic diagram of the overall structure of the left side of the housing mounted on the phase change material capsule of the present invention;

[0026] FIG8 is a schematic diagram of the overall structure of the rear side of the box body of the present invention;

[0027] FIG9 is a schematic diagram of the internal structure of the pressure relief pipe in the present invention.

[0028] In the accompanying drawings, 1-air pressure bag, 2-air storage bag, 3-vortex tube, 4-first conduit, 5-phase change material bag, 6-spring, 7-first one-way valve, 8-intake pipe, 9-second conduit, 10-third conduit, 11-pit, 12-vertical partition, 13-horizontal partition, 14-exhaust hole, 15-intake hole, 16-front cavity, 17-rear cavity, 18-connecting hole, 19-connecting pipe, 20-pressure relief pipe, 21-fixing plate, 22-first spring, 23-sealing plate, 24-pressure relief port, 25-connecting column, 26-bottom plate, 27-pedal, 28-pressure relief branch pipe. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0030] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0031] Example 1

[0032] As shown in Figures 1 to 9, this embodiment provides a constant temperature structure inside a shoe, which is characterized in that it includes an air pressure bag 1, an air storage bag 2, a vortex tube 3 and a phase change material bag 5. The air pressure bag 1 is connected to an air inlet pipe 8, and a first one-way valve 7 is arranged in the air inlet pipe 8. The air outlet of the air pressure bag 1 is connected to the air inlet of the air storage bag 2 through a first conduit 4, and the air outlet of the air storage bag 2 is connected to the air inlet of the vortex tube 3 through a second conduit 9. A second one-way valve is arranged at the air inlet of the air storage bag 2, and the aperture of the air inlet of the air storage bag 2 is larger than the aperture of the air outlet of the air storage bag 2. One end of the vortex tube 3 is connected to the outside of the shoe, and the other end of the vortex tube 3 is connected to the third conduit 10. The phase change material bag 5 is filled with phase change material, and the gas discharged from the third conduit 10 can undergo a phase change reaction with the phase change material and then be discharged into the shoe.

[0033] In this embodiment, the phase change material capsule 5 has a pit 11 on the top, and a box is installed in the pit 11. The front and rear sides of the box are open, and a vertical partition 12 is provided in the box. The vertical partition 12 divides the inner cavity of the box into a front cavity 16 and a rear cavity 17. A transverse partition 13 is provided in the front cavity 16, and the transverse partition 13 divides the front cavity 16 into a front upper cavity and a front lower cavity. The third conduit 10 is connected to the right wall of the front lower cavity, and the left walls of the front lower cavity and the front upper cavity are both provided with a connecting hole 18. The two connecting holes are connected by a connecting pipe 19. The top wall of the front upper cavity is provided with an exhaust hole 14, and the top wall of the rear cavity 17 is provided with an air inlet hole 15. The air inlet end of the air inlet pipe 8 is connected to the rear cavity 17.

[0034] In this embodiment, the air pressure bag 1, the air storage bag 2, the vortex tube 3 and the phase change material bag 5 are placed inside the shoe, below the insole.

[0035] In this embodiment, a spring 6 is connected between the inner top wall and the inner bottom wall of the air pressure bag 1.

[0036] In this embodiment, by stepping on the air pressure bag 1, the gas in the air pressure bag 1 can enter the air storage bag 2, forming gas pressure in the air storage bag 2. When the gas pressure in the air storage bag 2 meets the working conditions of the vortex tube 3, it enters the vortex tube 3 to make the vortex tube 3 work. The cold end or the hot end of the vortex tube 3 is connected to the right wall of the front lower cavity through the third conduit 10. When the cold end is connected to the third conduit 10, the temperature inside the shoe can be cooled. When the hot end is connected to the third conduit 10, the temperature inside the shoe can be heated. In this way, the temperature inside the shoe is less affected by the external environment and is not affected by the capacitor like an electric heater or refrigeration plate. A set of molds can produce shoes with two functions at the same time. By setting the phase change material bag 5, the uneven temperature of the gas discharged from the vortex tube 3 can be adjusted, so that the cooling or heating inside the shoe is balanced and can be continuously cooled or heated.

[0037] Example 2

[0038] This embodiment is further described based on Example 1. In this embodiment, the cold end of the vortex tube 3 is connected to the right wall of the front lower cavity of the box through the third conduit 10, the hot end of the vortex tube 3 is connected to the outside of the shoe, and the phase change temperature of the phase change material in the phase change material capsule 5 is lower than 34 degrees.

[0039] In this embodiment, the phase change temperature of the phase change material in the phase change material capsule 5 is 24 degrees.

[0040] In this embodiment, the sidewalls of the recess 11 and the top wall of the phase change material capsule 5 are made of heat-conducting material, and the rest of the phase change material capsule 5 may or may not be made of heat-conducting material, depending on actual needs.

[0041] The principle of heat dissipation in the shoe is as follows: when the foot steps down on the air pressure bag 1, the gas in the air pressure bag 1 enters the air storage bag 2 through the first conduit 4. When the foot is lifted up, the elastic restoring force of the spring 6 is used to return the air pressure bag 1 to its initial state. At this time, air enters the air pressure bag 1 through the air intake pipe 8, replenishing the gas in the air pressure bag 1. At the same time, the temperature of the gas passing through the air intake pipe 8 tends to the phase change temperature of the phase change material due to the reaction gas passing through the phase change material in the phase change material bag. Since the aperture of the air inlet of the air storage bag 2 is larger than the aperture of the air outlet, air pressure will be generated in the air storage bag 2 when a person keeps walking. When the air pressure is greater than the working condition of the vortex tube 3, a temperature difference will be generated between the hot and cold ends of the vortex tube 3. The air outlet of the cold end of the vortex tube 3 is connected to the right wall of the front lower cavity through the third conduit 10. The cold air enters the front lower cavity through the third conduit 10 and enters the front upper cavity through the connecting pipe 19. At this time, the cold air reacts with the phase change material in the phase change material bag and is then discharged through the exhaust hole 14 on the top wall of the front upper cavity to cool the inside of the shoe.

[0042] Since the pressure entering the air storage bag 2 when stepping on the air pressure bag 1 is unstable due to the unstable force of the person stepping on it, the temperature of the cold air discharged from the vortex tube 3 is uncontrollable. If the pressure is too high, the cold air temperature may be too low.

[0043] When the temperature of the phase change material in the phase change material bag 5 is set to be lower than 34 degrees and the temperature of the cold air discharged from the cold end of the vortex tube 3 is lower than the phase change temperature of the phase change material, the phase change material in the phase change material bag 5 adjacent to the cold air entering the box undergoes an exothermic reaction. At this time, the temperature of the cold air entering tends to the phase change temperature, and after being discharged through the exhaust hole, the inside of the shoe is cooled. In this way, although the temperature of the cold air discharged from the exhaust hole 14 is higher than the temperature when discharged from the cold end of the vortex tube 3, the phase change material can play a role in regulating the balance of the cold air temperature. After the phase change material absorbs the cold air, since the phase change material has a reaction time, if there is enough phase change material, the inside of the shoe can continue to be cooled within a few hours when the person stops exercising.

[0044] The human body temperature is around 36 degrees Celsius, and the normal temperature of the soles of the feet is between 34 and 36 degrees Celsius. When the temperature of the phase change material is set to 24 degrees Celsius, a temperature difference of about 10 degrees Celsius is always maintained between the soles of the feet and the phase change material. If the temperature difference is too large, hydrocondensation will occur, and the hydrocondensation will be aggravated between the phase change material and the soles of the feet. The air intake pipe 8 is connected to the rear cavity 17. When the air pressure bag 1 is restored, the suction force of the air intake pipe 8 sucks away the air with high humidity, thereby keeping the inside of the shoe dry. In addition, during the process of air intake 8 sucking air, since the temperature of the air entering the air intake pipe 8 is higher than the phase change temperature of the phase change material, the air entering the air intake pipe 8 will also undergo a phase change reaction with the phase change material. At this time, the temperature of the air entering the air intake pipe 8 is close to 24 degrees Celsius, which can ensure that the vortex tube 3 can keep the temperature of the air after passing through the vortex tube 3 below 24 degrees Celsius even when the air pressure is insufficient, so that the phase change material always undergoes phase change under the premise of cooling the vortex tube 3. The final set temperature needs to be determined according to the cooling temperature of the vortex tube 3, but the overall phase change temperature of the phase change material is not higher than 34 degrees.

[0045] When the ambient temperature exceeds the phase transition temperature and the phase change material has completed its phase transition, the air temperature passing through the vortex tube 3 is 34 degrees Celsius or higher. The vortex tube 3's cooling temperature is also above the phase transition temperature, so it cannot be activated and the entire system can only function as a ventilation device. Only when the person continues to exercise until the pressure in the air storage bag 2 meets the vortex tube 3's operating conditions and the temperature at the cold end of the vortex tube 3 is lower than the temperature required for the phase change material's phase transition reaction, will the system gradually return to normal.

[0046] In this embodiment, a first one-way valve 7 is provided in the air inlet pipe 8 to prevent the gas in the air pressure bag 1 from being discharged through the air inlet pipe 8 when the air pressure bag 1 is stepped on. A second one-way valve is provided at the air inlet of the air storage bag 2 to prevent the gas from flowing back from the air storage bag 2 to the air pressure bag 1.

[0047] Example 3

[0048] This embodiment is further described based on Example 1. In this embodiment, the hot end of the vortex tube 3 is connected to the right wall of the front lower cavity of the box through the third conduit 10, and the cold end of the vortex tube 3 is connected to the outside of the shoe. The phase change temperature of the phase change material in the phase change material capsule 5 is higher than 34 degrees.

[0049] In this embodiment, the hot end of the vortex tube 3 is connected to the right wall of the front lower cavity through the third conduit 10, and the cold end of the vortex tube 3 is connected to the outside of the shoe. The phase change temperature of the phase change material in the phase change material bag 5 is higher than 34 degrees.

[0050] In this embodiment, the sidewalls of the recess 11 and the top wall of the phase change material capsule 5 are made of heat-conducting material, and the rest of the phase change material capsule 5 may or may not be made of heat-conducting material, depending on actual needs.

[0051] The principle of heating the inside of the shoe is as follows: when the foot steps down on the air pressure bag 1, the gas in the air pressure bag 1 enters the air storage bag 2 through the first conduit 4. When the foot is lifted up, the elastic restoring force of the spring 6 is used to return the air pressure bag 1 to its initial state. At this time, air enters the air pressure bag 1 through the air inlet pipe 8 to replenish the gas in the air pressure bag 1. Since the aperture of the air inlet of the air storage bag 2 is larger than the aperture of the air outlet, air pressure will be generated in the air storage bag 2 during the continuous walking process. When the air pressure is greater than the working condition of the vortex tube 3, a temperature difference will be generated between the hot and cold ends of the vortex tube 3. The hot end outlet of the vortex tube 3 is connected to the right wall of the front lower cavity through the third conduit 10. The hot air enters the front lower cavity through the third conduit 10, enters the front upper cavity through the connecting pipe 19, and is discharged through the exhaust hole 14 on the top wall of the front upper cavity to heat the inside of the shoe.

[0052] Since the pressure entering the air storage bag 2 when stepping on the air pressure bag 1 is unstable, the temperature of the hot air discharged from the vortex tube 3 is uncontrollable. If the pressure is too high, the hot air temperature may be too high.

[0053] The temperature of the phase change material in the phase change material capsule 5 is set above 34 degrees Celsius. When the temperature of the hot gas discharged from the hot end of the vortex tube 3 is higher than the phase change temperature of the phase change material, the phase change material in the phase change material capsule 5 adjacent to the hot gas entering the box undergoes an endothermic reaction, releasing heat and heating the inside of the shoe. In this way, although the temperature of the hot gas discharged from the exhaust hole 14 is lower than the temperature when it is discharged from the hot end of the vortex tube 3, the phase change material can still regulate the temperature balance of the hot gas. After the phase change material absorbs the hot gas, due to the reaction time of the phase change material, if there is sufficient phase change material, the inside of the shoe can continue to heat even for several hours after the user stops exercising.

[0054] The human body temperature is around 36 degrees Celsius, and the normal temperature of the soles of the feet is between 34 and 36 degrees Celsius. When the temperature of the phase change material is set to 40 degrees Celsius, a temperature difference is always maintained between the soles of the feet and the phase change material. To reduce condensation, the temperature difference is set to within 5 degrees Celsius. During the process of air intake 8 sucking air, because the temperature of the air entering the intake duct 8 is lower than the phase change temperature of the phase change material, the air entering the intake duct 8 will also undergo a phase change reaction with the phase change material. At this time, the temperature of the air entering the intake duct 8 is close to 40 degrees Celsius. This ensures that the temperature of the air after passing through the vortex tube 3 is above 40 degrees Celsius even in the case of insufficient air pressure, thereby ensuring that the phase change material always undergoes phase change under the premise of heating by the vortex tube 3.

[0055] When the ambient temperature is below the phase-change temperature and the phase-change material has completed its phase change, the air temperature passing through the vortex tube 3 falls below 34°C. The heating temperature of the vortex tube 3 is also below the phase-change temperature, so the vortex tube 3 cannot be activated, and the entire system can only function as ventilation. Only when the person continues to exercise until the pressure in the air storage bag 2 meets the operating conditions of the vortex tube 3 and the temperature at the hot end of the vortex tube 3 exceeds the temperature required for the phase-change material's endothermic reaction, will the system gradually return to normal.

[0056] In this embodiment, a first one-way valve 7 is provided in the air inlet pipe 8 to prevent the gas in the air pressure bag 1 from being discharged through the air inlet pipe 8 when the air pressure bag 1 is stepped on. A second one-way valve is provided at the air inlet of the air storage bag 2 to prevent the gas from flowing back from the air storage bag 2 to the air pressure bag 1.

[0057] Example 4

[0058] This embodiment is further limited based on Example 1. This embodiment also includes a base plate 26 and a pedal 27. The front end of the pedal 27 is hinged to the front end of the base plate 26, and the air pressure bag 1 is placed between the base plate 26 and the pedal 27.

[0059] In this embodiment, a pedal 27 and a base plate 26 are provided, and the air pressure bag 1 is placed between them, with the bag 1 positioned at the front. This creates a lever structure. When a 50 kg person walks, the downward pressure exerted by a single foot is approximately 0.3 MPa. Using the lever, the pressure within the air reservoir 2 can be increased to greater than 0.3 MPa, meeting the operating pressure of the vortex tube 3. For people weighing less than 50 kg, the distance between the lever fulcrums can be adjusted to increase the pressure within the air reservoir 2 to greater than 0.3 MPa. This lever saves effort and is suitable for a wider range of people.

[0060] Example 5

[0061] This embodiment is further limited based on the embodiment 1. In this embodiment, the air storage bag 2 is connected to a pressure relief pipe 20 , and a pressure relief valve is provided in the pressure relief pipe 20 .

[0062] The pressure relief valve in this embodiment includes a fixed plate 21, a first spring 22 and a sealing plate 23. The fixed plate 21 is installed in the pressure relief pipe 20. A pressure relief port 24 is opened on the side wall of the pressure relief pipe 20. The pressure relief port 24 is connected to the outside of the shoe. The pressure relief port 24 is located between the fixed plate 21 and the sealing plate 23. The two ends of the first spring 22 are respectively connected to the fixed plate 21 and the sealing plate 23.

[0063] In this embodiment, a pressure relief branch pipe 28 is connected to the pressure relief port 24 , and the pressure relief branch pipe 28 is in communication with the outside of the shoe.

[0064] In this embodiment, the sealing plate 23 is connected to a connecting column 25 , and the connecting column 25 movably passes through the fixing plate 21 .

[0065] When the pressure in the air storage bag 2 is too high, the foot cannot step on the air pressure bag 1, which affects the foot feel and causes the temperature of the cold end of the vortex tube 3 to be too low. In this embodiment, a pressure relief pipe 20 and a pressure relief valve are provided. During operation, when the pressure in the air storage bag 2 reaches the threshold value, the air pressure in the air storage bag 2 will overcome the resistance of the first spring 22 and push the sealing plate 23 to move. The gas in the air storage bag 2 will be discharged through the pressure relief port 24 to relieve the pressure of the air storage bag 2, and at the same time, it can also prevent the cold temperature discharged from the vortex tube 3 from being too low.

[0066] At the same time, since the air intake and air output of this device are inconsistent, the pressure difference inside the shoe will cause discomfort when wearing. At this time, the number of air holes above the phase change material bag in the insole and the area of ​​the air holes can be increased to expand the range of gas intake. At the same time, with the help of a breathable upper, the pressure difference inside the shoe can be reduced, thereby reducing the discomfort when wearing.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A constant temperature structure inside a shoe, characterized in that: The invention comprises an air pressure bag (1), an air storage bag (2), a vortex tube (3) and a phase change material bag (5); the air pressure bag (1) is connected to an air inlet pipe (8); a first one-way valve (7) is arranged in the air inlet pipe (8); the air outlet of the air pressure bag (1) is connected to the air inlet of the air storage bag (2) through a first conduit (4); the air outlet of the air storage bag (2) is connected to the air inlet of the vortex tube (3) through a second conduit (9); a second one-way valve is arranged at the air inlet of the air storage bag (2); the aperture of the air inlet of the air storage bag (2) is larger than the aperture of the air outlet of the air storage bag (2); one end of the vortex tube (3) is connected to the outside of the shoe; the other end of the vortex tube (3) is connected to a third conduit (10); the phase change material bag (5) is filled with a phase change material; the gas discharged from the third conduit (10) can undergo a phase change reaction with the phase change material and then be discharged into the shoe.

2. The in-shoe constant temperature structure of a shoe according to claim 1, characterized in that: The phase change material capsule (5) has a concave pit (11) at the top, a box body is installed in the concave pit (11), the front and rear sides of the box body are open, a vertical partition (12) is arranged in the box body, the vertical partition (12) divides the inner cavity of the box body into a front cavity (16) and a rear cavity (17), a transverse partition (13) is arranged in the front cavity (16), the transverse partition (13) divides the front cavity (16) into a front upper cavity and a front lower cavity, the third conduit (10) is connected to the right wall of the front lower cavity, the left walls of the front lower cavity and the front upper cavity are both provided with a connecting hole (18), the two connecting holes are connected by a connecting pipe (19), the top wall of the front upper cavity is provided with an exhaust hole (14), the top wall of the rear cavity (17) is provided with an air inlet hole (15), and the air inlet end of the air inlet pipe (8) is connected to the rear cavity (17).

3. The in-shoe constant temperature structure of a shoe according to claim 1, characterized in that: A spring (6) is connected between the inner top wall and the inner bottom wall of the air pressure bag (1).

4. The in-shoe constant temperature structure of a shoe according to claim 1, characterized in that: The cold end of the vortex tube (3) is connected to the right wall of the front lower chamber of the box through a third conduit (10), the hot end of the vortex tube (3) is connected to the outside of the shoe, and the phase change temperature of the phase change material in the phase change material capsule (5) is lower than 34 degrees.

5. The in-shoe constant temperature structure of a shoe according to claim 1, characterized in that: The hot end of the vortex tube (3) is connected to the right wall of the front lower chamber of the box through a third conduit (10), the cold end of the vortex tube (3) is connected to the outside of the shoe, and the phase change temperature of the phase change material in the phase change material bag (5) is higher than 34 degrees.

6. The in-shoe constant temperature structure of a shoe according to claim 1, characterized in that: It also comprises a base plate (26) and a pedal (27), wherein the front end of the pedal (27) is hinged to the front end of the base plate (26), and the air pressure bag (1) is placed between the base plate (26) and the pedal (27).

7. The in-shoe constant temperature structure of a shoe according to claim 1, characterized in that: The air storage bag (2) is connected to a pressure relief pipe (20), and a pressure relief valve is arranged in the pressure relief pipe (20).

8. The in-shoe constant temperature structure of a shoe according to claim 7, characterized in that: The pressure relief valve comprises a fixing plate (21), a first spring (22) and a sealing plate (23); the fixing plate (21) is installed in the pressure relief pipe (20); a pressure relief port (24) is provided on the side wall of the pressure relief pipe (20); the pressure relief port (24) is communicated with the outside of the shoe; the pressure relief port (24) is located between the fixing plate (21) and the sealing plate (23); and two ends of the first spring (22) are respectively connected to the fixing plate (21) and the sealing plate (23).

9. The in-shoe constant temperature structure of a shoe according to claim 1, characterized in that: The sealing plate (23) is connected to a connecting column (25), and the connecting column (25) movably penetrates the fixing plate (21).

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