Ice surface preparation device for sole slip resistance test

Abstract

This application provides an ice surface preparation device for shoe sole anti-slip testing, including a compressor, a condenser, an expansion valve, an evaporator, a refrigeration chamber, and an ice-making tray. The upper surface of the refrigeration chamber has a refrigeration groove. The evaporator includes refrigeration copper pipes embedded in the bottom surface of the refrigeration groove. The ice-making tray is located in the refrigeration groove, and its lower surface is in contact with the bottom surface of the refrigeration groove. The circuit path formed by the compressor, condenser, expansion valve, and evaporator is clear and without complex branches. The refrigeration chamber encloses the evaporator, reducing heat loss. The embedded refrigeration copper pipes prevent displacement during multiple tests. Furthermore, the bottom surface of the refrigeration groove is tightly fitted to the lower surface of the ice-making tray, allowing the cold energy absorbed by the refrigerant in the evaporator to be quickly transferred to the ice-making tray, preventing cold energy loss in gaps and improving the efficiency of ice making and frosting.

Description

Technical Field

[0001] This application relates to the field of footwear testing equipment, and in particular to an ice surface preparation device for testing the anti-slip properties of shoe soles. Background Technology

[0002] Slip resistance is a key indicator of walking safety, especially in low-temperature, icy, and snowy environments, where the coefficient of friction between the sole and the ice surface directly affects safety. To ensure the slip resistance of shoes under various surface conditions, thereby guaranteeing user safety and comfort, slip resistance testing is essential. Depending on the wearer, especially the elderly, children, or those in certain professions (such as chefs and medical personnel) who face higher risks, and considering different wearing environments such as wet, oily, or uneven surfaces (e.g., tiles, marble, rainy or snowy roads), slip resistance testing assesses the sole's grip in specific environments, reducing the risk of accidents.

[0003] Currently, when conducting anti-slip tests on shoe soles, the industry first needs to prepare an ice or frost surface that meets the testing standards. This ice surface preparation equipment, which uses devices to prepare ice surfaces that meet testing standards (such as the SATRA standard), is mainly used in conjunction with dynamic anti-slip testing equipment. By forming a uniform and stable ice surface on a specific carrier (such as an ice tray), it simulates an icy road environment to evaluate the anti-slip coefficient of the shoe sole on the ice, ensuring the safety of shoes under low-temperature, icy conditions. However, existing ice surface preparation technologies are slow, energy-intensive, and inefficient for testing the anti-slip properties of shoe soles. Utility Model Content

[0004] In view of the aforementioned problems, this application is made to provide an ice surface preparation apparatus for shoe sole anti-slip testing that overcomes or at least partially solves the aforementioned problems, comprising a compressor, a condenser, an expansion valve, an evaporator, a refrigeration box, and an ice-making tray;

[0005] The compressor's input end is connected to the evaporator's output end, and its output end is connected to the condenser's input end. The expansion valve's input end is connected to the condenser's output end, and its output end is connected to the evaporator's input end. Refrigerant circulates in the passage between the compressor, the condenser, the expansion valve, and the evaporator.

[0006] The upper surface of the refrigeration box is provided with a refrigeration slot, the evaporator includes refrigeration copper tubes, the refrigeration copper tubes are embedded and distributed on the bottom surface of the refrigeration slot, the ice maker is provided in the refrigeration slot, and the lower surface of the ice maker is in contact with the bottom surface of the refrigeration slot.

[0007] Preferably, the cooling copper tubes are arranged in a serpentine or matrix pattern.

[0008] Preferably, the bottom surface of the refrigeration tank and the lower surface of the ice-making tray are respectively provided with copper tube grooves, and the sum of the depths of the two copper tube grooves is equal to or greater than the diameter of the refrigeration copper tube.

[0009] Preferably, the refrigeration copper tube extends above the bottom surface of the refrigeration tank, and the height of the refrigeration copper tube within the copper tube groove of the ice-making tray is greater than its height within the copper tube groove of the refrigeration tank.

[0010] Preferably, the upper surface of the ice-making tray is a shoe sole anti-slip test surface, which includes test areas for at least three different samples.

[0011] Preferably, an oily insulating layer is provided between the bottom surface of the refrigeration tank and the lower surface of the ice-making tray.

[0012] Preferably, the ice-making tray is made of aluminum.

[0013] Preferably, the upper surface of the ice-making tray is a smooth plane or has raised structures for simulating different ice surface textures.

[0014] Preferably, the condenser is an environmentally friendly hydrofluorocarbon condenser.

[0015] This application has the following advantages:

[0016] In this application embodiment, in response to the problems of "slow ice-making speed, high energy consumption, and low efficiency in anti-slip testing of shoe soles" in the prior art, this application provides a solution for the design of a compressor, condenser, expansion valve, evaporator forming a circuit, and a detachable ice tray. Specifically, it includes a compressor, condenser, expansion valve, evaporator, refrigeration box, and ice tray; the input end of the compressor is connected to the output end of the evaporator, and the output end is connected to the input end of the condenser; the input end of the expansion valve is connected to the output end of the condenser, and the output end is connected to the input end of the evaporator; a refrigerant circulates in the passage between the compressor, the condenser, the expansion valve, and the evaporator; a refrigeration tank is formed on the upper surface of the refrigeration box; the evaporator includes refrigeration copper tubes, which are embedded and distributed on the bottom surface of the refrigeration tank; the ice tray is placed in the refrigeration tank, and the lower surface of the ice tray is in contact with the bottom surface of the refrigeration tank. The circuit path formed by the compressor, condenser, expansion valve, and evaporator is clear and without complex branches. The refrigeration box encloses the evaporator to reduce heat loss. The refrigeration copper pipes, as the main body of the evaporator, are embedded in the refrigeration tank to prevent displacement during multiple tests. Furthermore, the bottom surface of the refrigeration tank is in close contact with the lower surface of the ice-making tray. The cold energy absorbed by the refrigerant in the evaporator can be quickly transferred to the ice-making tray, avoiding the loss of cold energy in the gaps and improving the efficiency of ice making and frosting. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an ice surface preparation device for shoe sole anti-slip testing according to an embodiment of this application.

[0019] Figure 2 This is a cross-sectional schematic diagram of an ice surface preparation device for shoe sole anti-slip testing according to an embodiment of this application;

[0020] Figure 3 This is a partial cross-sectional schematic diagram of an ice surface preparation device for shoe sole anti-slip testing according to an embodiment of this application;

[0021] Figure 4 This is another schematic diagram of an ice surface preparation device for shoe sole anti-slip testing provided in one embodiment of this application.

[0022] The reference numerals in the accompanying drawings are as follows:

[0023] 1. Refrigeration box; 2. Ice maker; 3. Refrigeration copper pipe; 31. First copper pipe connector; 32. Second copper pipe connector; 4. Compressor; 5. Condenser; 6. Expansion valve; 7. Refrigeration tank; 8. Oily insulating layer; 9. Water inlet; 10. Water outlet. Detailed Implementation

[0024] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] The inventors discovered through analysis of existing technology that:

[0026] 1. The ice tray and the back of the ice maker are connected by a set of copper pipes. The copper pipes are relatively hard and very short. After the ice is made, the entire ice maker has to be pulled out and turned in one direction before the ice tray can be placed on the anti-slip machine's operating table, which is inconvenient to operate.

[0027] 2. The ice-making speed is slow; it takes 4 hours to complete one ice-making process that meets the test standards.

[0028] 3. The ice tray and the ice maker's tank are in contact. The ice tray material is not smooth enough. After freezing, the ice tray and the ice maker's tank will stick together and are difficult to separate, making it inconvenient to take out.

[0029] 4. Due to the limited size of the ice tray, only one sample can be tested at a time, resulting in low efficiency.

[0030] Reference Figures 1-4 This application illustrates an ice surface preparation device for shoe sole anti-slip testing, comprising a compressor 4, a condenser 5, an expansion valve 6, an evaporator, a refrigeration box 1, and an ice-making tray 2.

[0031] The input end of the compressor 4 is connected to the output end of the evaporator, and the output end is connected to the input end of the condenser 5. The input end of the expansion valve 6 is connected to the output end of the condenser 5, and the output end is connected to the input end of the evaporator. Refrigerant circulates in the passage between the compressor 4, the condenser 5, the expansion valve 6, and the evaporator.

[0032] The upper surface of the refrigeration box 1 is provided with a refrigeration groove 7. The evaporator includes a refrigeration copper tube 3, which is embedded in the bottom surface of the refrigeration groove 7. The ice-making tray 2 is provided in the refrigeration groove 7, and the lower surface of the ice-making tray 2 is in contact with the bottom surface of the refrigeration groove 7.

[0033] In this embodiment, in response to the problems of "slow ice-making speed, high energy consumption, and low efficiency in anti-slip testing of shoe soles" in the prior art, this application provides a solution for forming a circuit with a compressor, condenser, expansion valve, and evaporator, as well as a detachable ice tray design. Specifically, it includes a compressor 4, a condenser 5, an expansion valve 6, an evaporator, a refrigeration box 1, and an ice tray 2. The input end of the compressor 4 is connected to the output end of the evaporator, and the output end is connected to the input end of the condenser 5. The input end of the expansion valve 6 is connected to the output end of the condenser 5, and the output end is connected to the input end of the evaporator. A refrigerant circulates in the passage between the compressor 4, the condenser 5, the expansion valve 6, and the evaporator. A refrigeration tank 7 is formed on the upper surface of the refrigeration box 1. The evaporator includes refrigeration copper pipes 3, which are embedded and distributed on the bottom surface of the refrigeration tank 7. The ice tray 2 is placed in the refrigeration tank 7, and the lower surface of the ice tray 2 is in contact with the bottom surface of the refrigeration tank 7. The circuit path formed by compressor 4, condenser 5, expansion valve 6, and evaporator is clear and without complex branches. The refrigeration box 1 encloses the evaporator to reduce heat loss. The refrigeration copper pipe 3, as the main body of the evaporator, is embedded in the refrigeration tank 7 to prevent displacement during multiple tests. Furthermore, the bottom surface of the refrigeration tank 7 is in close contact with the lower surface of the ice-making tray 2. The cold energy absorbed by the refrigerant in the evaporator can be quickly transferred to the ice-making tray 2, avoiding the loss of cold energy in the gap and improving the efficiency of ice making and frosting.

[0034] The following will further describe an ice surface preparation apparatus for shoe sole anti-slip testing according to various exemplary embodiments of this application.

[0035] It should be noted that compressor 4 ensures rapid cooling. Condenser 5 transfers heat from the system to the external medium through heat exchange, causing the high-temperature refrigerant to condense from a gaseous state to a liquid state. Expansion valve 6 controls the refrigerant flow rate, using a capillary tube coil to control the refrigerant velocity, thereby indirectly controlling the cooling speed. Expansion valve 6 achieves throttling and pressure reduction, and regulates the refrigerant flow rate to ensure efficient operation of the refrigeration copper pipes and prevent damage to the compressor. Refrigeration copper pipe 3 has a first connector 31 and a second connector 32, which connect to compressor 4 and expansion valve 6 respectively. Refrigeration copper pipe 3 has good thermal conductivity, allowing the refrigerant to circulate quickly.

[0036] Compressor 4 starts, drawing in low-temperature, low-pressure refrigerant gas from the evaporator, compressing it into high-temperature, high-pressure gas, and pumping it into condenser 5. In condenser 5, the high-temperature, high-pressure gas dissipates heat to the ambient air, gradually condensing into a medium-temperature, high-pressure liquid. The high-pressure liquid refrigerant flows through expansion valve 6, where it is throttled and depressurized, becoming a low-temperature, low-pressure mist mixture. This low-temperature mist mixture enters the evaporator, absorbs heat from the refrigeration tank 7 and ice tray 2, and evaporates completely, returning to low-temperature, low-pressure gas. This heat absorption process causes the temperature of the refrigeration tank 7 to plummet, resulting in the air around the ice tray 2 condensing into frost. The evaporated low-temperature, low-pressure gas is then drawn back into compressor 4, and the cycle repeats.

[0037] As an example, refer to Figure 4 The ice tray 2 needs to be filled with purified water. The refrigeration box 1 is also equipped with a water inlet 9 and a water outlet 10. The water inlet 9 and the water outlet 10 are reserved and their main function is to guide the circulation of hot and cold water, which can improve the freezing efficiency or perform secondary ice melting.

[0038] As an example, the compressor is a power compressor adapted to the needs of rapid cooling. A CAJ2464Z compressor can be selected, which can meet the requirement of the refrigeration system forming a frost surface with a thickness of not less than 2mm within 1 hour.

[0039] As an example, the dimensions of the refrigeration tank and ice-making tray are such that at least four samples can be tested after one ice-making cycle. The external dimensions of the refrigeration tank are 520*260*approximately 25mm, and the tank depth is approximately 12mm. The external dimensions of the refrigeration tray are 500*250*13mm, and the tray depth is 10mm.

[0040] In one specific implementation, a PLC control system is also included. The PLC control system is electrically connected to the compressor, condenser, and expansion valve, respectively, and is used to control the operating parameters of the refrigeration process. The heat dissipation end of the condenser 5 is also equipped with a filter to filter the cooled refrigerant, absorb trace amounts of moisture and impurities in the refrigerant, and prevent capillary tube blockage.

[0041] In one specific implementation, the refrigeration box 1 is also equipped with a water inlet and a water outlet. The ice-making tray 2 needs to be filled with pure water. The water inlet and water outlet are reserved and their main function is to guide the circulation of hot and cold water, which can improve the freezing efficiency or perform secondary ice melting.

[0042] In this embodiment, the cooling copper tubes 3 are arranged in a serpentine or matrix pattern.

[0043] It should be noted that this avoids localized cold concentration and solves the problem of "low temperature in the copper pipe area and high temperature in the non-copper pipe area" that is common with traditional copper pipe bonding. The surface temperature difference of the ice tray 2 can be controlled within ±0.8℃, and the frost layer thickness deviation is less than 0.2mm.

[0044] In one specific implementation, the cooling copper tube 3 adopts a serpentine layout, protruding at least half of the surface of the cooling tank 7.

[0045] In this embodiment, the bottom surface of the refrigeration tank 7 and the lower surface of the ice-making tray 2 are respectively provided with copper tube grooves, and the sum of the depths of the two copper tube grooves is equal to or greater than the diameter of the refrigeration copper tube 3.

[0046] It should be noted that the above embodiments can ensure that the bottom surface of the refrigeration tank 7 and the lower surface of the ice-making tray 2 are in close contact.

[0047] In this embodiment, the refrigeration copper pipe 3 is higher than the bottom surface of the refrigeration tank 7, and the height of the refrigeration copper pipe 3 in the copper pipe groove of the ice-making tray 2 is greater than its height in the copper pipe groove of the refrigeration tank 7.

[0048] It should be noted that most of the cooling copper tube 3 is located inside the copper tube groove of the ice-making tray 2, so that the cooling copper tube 3 has a larger area in direct contact with the ice-making tray 2, thereby improving the efficiency of ice making and frosting.

[0049] In this embodiment, the upper surface of the ice-making tray 2 is a shoe sole anti-slip test surface, which includes test areas for at least three different samples.

[0050] It should be noted that the anti-slip test of the sole includes tests such as toe slippage, heel slippage, and horizontal slippage. That is, the test surface of the ice-making tray 2 should include at least the above three test areas, which can reduce the number of ice-making times, shorten the test time, and improve the test efficiency.

[0051] In this embodiment, an oily insulating layer 8 is provided between the bottom surface of the refrigeration tank 7 and the lower surface of the ice-making tray 2.

[0052] It should be noted that during the condensation process, the refrigeration tank 7 and the ice tray 2 are prone to sticking together. The oily isolation layer 8 is provided to facilitate the separation of the ice tray 2.

[0053] As an example, to prevent the surface from freezing and causing the refrigeration tank 7 to stick to the ice tray, measures such as making the contact surface smooth to achieve a mirror-like roughness, using an oily insulating layer material, and filling with ultra-low temperature refrigerant can be taken into account. After ice making is completed, the ice tray and the refrigeration tank can be easily separated and conveniently used.

[0054] As an example, an oil-based barrier material can be an anti-icing coating material.

[0055] In this embodiment, the ice-making tray 2 is made of aluminum. Its bottom is tightly bonded to the cooling layer.

[0056] In this embodiment, the upper surface of the ice-making tray 2 is a smooth plane or has a raised structure for simulating different ice surface textures.

[0057] In this embodiment, the condenser is an environmentally friendly hydrofluorocarbon condenser.

[0058] The method of using this device is as follows:

[0059] Turn on the power, set the appropriate temperature, and the system will start working. Once the ice surface reaches the test requirements, remove ice tray 2 to conduct the test.

[0060] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0061] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0062] The above provides a detailed description of an ice surface preparation device for shoe sole anti-slip testing. Specific examples have been used to illustrate the principle and implementation of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this application. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An ice surface preparation device for shoe sole anti-slip testing, characterized in that, This includes the compressor, condenser, expansion valve, evaporator, refrigerator, and ice maker. The compressor's input end is connected to the evaporator's output end, and its output end is connected to the condenser's input end. The expansion valve's input end is connected to the condenser's output end, and its output end is connected to the evaporator's input end. Refrigerant circulates in the passage between the compressor, the condenser, the expansion valve, and the evaporator. The upper surface of the refrigeration box is provided with a refrigeration slot, the evaporator includes refrigeration copper tubes, the refrigeration copper tubes are embedded and distributed on the bottom surface of the refrigeration slot, the ice maker is provided in the refrigeration slot, and the lower surface of the ice maker is in contact with the bottom surface of the refrigeration slot.

2. The ice surface preparation device for shoe sole anti-slip testing according to claim 1, characterized in that, The cooling copper tubes are arranged in a serpentine or matrix pattern.

3. The ice surface preparation device for shoe sole anti-slip testing according to claim 1, characterized in that, The bottom surface of the refrigeration tank and the lower surface of the ice-making tray are respectively provided with copper tube grooves, and the sum of the depths of the two copper tube grooves is equal to or greater than the diameter of the refrigeration copper tube.

4. The ice surface preparation device for shoe sole anti-slip testing according to claim 3, characterized in that, The refrigeration copper pipe extends above the bottom surface of the refrigeration tank, and the height of the refrigeration copper pipe within the copper pipe groove of the ice-making tray is greater than its height within the copper pipe groove of the refrigeration tank.

5. The ice surface preparation device for shoe sole anti-slip testing according to claim 4, characterized in that, The upper surface of the ice-making tray is a shoe sole anti-slip test surface, which includes test areas for at least three different samples.

6. The ice surface preparation device for shoe sole anti-slip testing according to claim 1, characterized in that, An oily insulating layer is provided between the bottom surface of the refrigeration tank and the lower surface of the ice-making tray.

7. The ice surface preparation device for shoe sole anti-slip testing according to claim 1, characterized in that, The ice-making tray is made of aluminum.

8. The ice surface preparation device for shoe sole anti-slip testing according to claim 1, characterized in that, The upper surface of the ice-making tray is either a smooth plane or has raised structures to simulate different ice surface textures.

9. The ice surface preparation device for shoe sole anti-slip testing according to claim 1, characterized in that, The condenser is an environmentally friendly hydrofluorocarbon condenser.

Images