Water mixing system with frost crack prevention technology

Abstract

The invention discloses a water mixing system with a frost crack prevention technology, and belongs to the technical field of bathroom hardware. The water mixing system comprises a shell assembly, a water mixing valve is arranged on one side of the shell assembly, and a first water inlet channel, a second water inlet channel and a water mixing channel are formed in the shell assembly; the water outlet side of the first water inlet channel and the water outlet side of the second water inlet channel are communicated with the water mixing valve, the water outlet side of the water mixing valve is communicated with the water inlet side of the water mixing channel, at least one air trapping cavity is formed in the shell assembly, and the volume of the air trapping cavity accounts for 15%-20% of the total volume of the first water inlet channel, the second water inlet channel and the water mixing channel. The air trapping cavity is formed in the shell assembly, sufficient buffer space is provided for frozen and expanded water, the valve body is prevented from being broken from the source, and meanwhile the stability of the water mixing adjusting function is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of water mixing system with anti-frost crack technology, belong to bathroom hardware technical field. BACKGROUND

[0002] The existing water mixing valve mainly includes manual water mixing valve and thermostatic mixing valve. Manual temperature control valve usually adopts screw valve core, the rotation of handle is converted into the linear displacement of valve core by screw mechanism, so as to realize the adjustment of temperature. The structure form and action principle of this valve determine that its operation is relatively intuitive and simple, is suitable for the occasion that temperature control requirement is not very high or needs manual adjustment. The selection and use of manual temperature control valve mainly depend on its material, brand and whether it meets specific installation requirements and other factors. Manual water mixing valve is a valve, mixes cold and hot water. In fact, the valve itself cannot be mixed, only the cold and hot water pipes are connected, which plays a mixing role. Thermostatic mixing valve is mainly related to the supporting products of heating system, and is widely used in electric water heater, solar water heater and central hot water supply system. The water mixing valve adjusts the proportion of cold and hot water to realize the adjustment of water temperature, so as to ensure that the outlet water temperature is constant and is not affected by water temperature, flow and water pressure.

[0003] The reliability of shower water mixing valve as the core component of adjusting the proportion of cold and hot water is very important in low temperature environment. The existing technology has the following key defects:

[0004] When the internal accumulated water is not emptied in winter, the volume of ice expands by about 9%, which easily leads to the rupture of valve body passage. In winter, the rupture rate of valve body is high in areas without central heating.

[0005] The traditional water mixing valve has a full water structure inside, lacks reserved expansion space, and the pressure directly acts on the valve body wall when freezing, which is far beyond the pressure limit of the material of the water mixing valve. SUMMARY

[0006] The purpose of the present application is to provide a water mixing system with anti-frost crack technology to solve the problems raised in the background.

[0007] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0008] Compared with the prior art, the present application provides a water mixing system with anti-frost crack technology, which comprises a shell assembly, a water mixing valve is arranged on one side of the shell assembly, a water inlet passage one, a water inlet passage two and a water mixing passage are formed in the shell assembly, the water outlet sides of the water inlet passage one and the water inlet passage two are communicated with the water mixing valve, the water outlet side of the water mixing valve is communicated with the water inlet side of the water mixing passage, at least one air trapping cavity is arranged in the shell assembly, and the volume of the air trapping cavity accounts for 15% to 20% of the total volume of the water inlet passage one, the water inlet passage two and the water mixing passage.

[0009] Preferably, the rear side of the shell assembly is provided with a water inlet connector one in communication with the water inlet passage one, and the rear side of the shell assembly is provided with a water inlet connector two in communication with the water inlet passage two.

[0010] Preferably, the upper surface of the shell assembly is provided with two water outlet openings one, and the shell assembly is provided with a control valve one for controlling the flow of mixed water in the mixed water passage through the water outlet openings one.

[0011] Preferably, the bottom of the shell assembly is provided with water outlet openings two and three, and the shell assembly is provided with control valves two and three for controlling the flow of mixed water in the mixed water passage through the water outlet openings two and three.

[0012] Preferably, the shell assembly comprises a shell and a top cover, the air trapping cavity is arranged on the lower surface of the top cover, and the water inlet passage one, the water inlet passage two and the mixed water passage are arranged on the shell.

[0013] Compared with the prior art, the beneficial effects of the present application are:

[0014] The buffer design of the air trapping cavity can completely absorb the volume expansion of the frozen water body, the pressure on the valve body wall surface is reduced from 2.2MPa to 1.2MPa, the winter breakage rate is reduced, and the pain point of easy damage of the mixed water valve in low temperature areas is solved;

[0015] The multi-outlet design cooperates with the independent control valve, which can simultaneously connect the top spray, handheld shower and lower water outlet, meet the diversified showering needs, and improve the operation convenience. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0017] Figure 1 It is the overall structure schematic diagram of the embodiment one of the present application;

[0018] Figure 2 It is the structure schematic diagram of the top cover of the embodiment one of the present application;

[0019] Figure 3 It is the structure schematic diagram of the shell of the embodiment one of the present application;

[0020] Figure 4 It is the structure bottom view of the shell of the embodiment one of the present application;

[0021] Figure 5Fig. 1 is a schematic diagram of the overall structure of embodiment one of the present application;

[0022] Figure 6 Fig. 2 is a schematic diagram of the structure of the top cover of embodiment one of the present application.

[0023] Fig. 1 is a schematic diagram of the overall structure of embodiment one of the present application; DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0025] Embodiment one

[0026] Please refer to Figures 1-4 , the present application provides a technical solution:

[0027] As Figures 1-3 shown, a water mixing system with anti-freezing and cracking technology comprises a shell assembly, the shell assembly is provided with a water mixing valve 7 on one side, the shell assembly is integrally formed with a first water inlet passage 3, a second water inlet passage 5 and a water mixing passage 8, the water inlet ends of the first water inlet passage 3 and the second water inlet passage 5 are respectively connected to a first water inlet connector 4 and a second water inlet connector 6, and the water outlet ends are merged at the water mixing valve 7, the water outlet side of the water mixing valve 7 is connected to the water inlet side of the water mixing passage 8, the water mixing valve 7 adopts a double ceramic disc valve core, is installed in a valve core cavity on the right side of the shell 1, and the cold and hot water ratio is adjusted by rotating a handle, the temperature adjustment range is 35-50℃, the water flow after mixing enters the water mixing passage 8, the shell assembly is provided with at least one air trapping cavity 15, the roughness Ra of the inner wall of the air trapping cavity 15 is ≤1.6μm, the air bubble adhesion is reduced, the volume of the air trapping cavity 15 accounts for 15%-20% of the total volume of the first water inlet passage 3, the second water inlet passage 5 and the water mixing passage 8, and in actual use, the initial air filling rate in the air trapping cavity 15 is 85% and does not interfere with the normal water flow.

[0028] Further, the rear side of the shell assembly is provided with the first water inlet connector 4 connected to the first water inlet passage 3, and the rear side of the shell assembly is provided with the second water inlet connector 6 connected to the second water inlet passage 5.

[0029] Further, the upper surface of the shell assembly is provided with two water outlets 10, the distance between the two water outlets 10 is 60mm, which is suitable for the top shower head, and the shell assembly is provided with a control valve 9 for controlling the flow of mixed water in the mixed water passage 8 through the water outlet 10.

[0030] As shown in Figure 4 The bottom of the shell assembly is provided with a water outlet 12 and a water outlet 14, and the shell assembly is provided with a control valve 11 and a control valve 13 for controlling the flow of mixed water in the mixed water passage 8 through the water outlet 12 and the water outlet 14, so as to realize the independent on-off of the water outlet 12 and the water outlet 14.

[0031] Among them, the control valve 9, the control valve 11 and the control valve 13 are all brass ball valves with sealing level VI.

[0032] Further, the shell assembly includes a shell 1 and a top cover 2, the gas trapping cavity 15 is arranged on the lower surface of the top cover 2, the water inlet passage 3, the water inlet passage 5 and the mixed water passage 8 are arranged on the shell 1, and in actual use, the shell 1 and the top cover 2 can be sealed and connected by four M5 bolts, and an EPDM rubber sealing ring is arranged at the joint, the cross-sectional diameter of the sealing ring is 1.5mm, and the waterproof level reaches IPX4, which can withstand 360° water spray without leakage.

[0033] Example two

[0034] Please refer to Figures 5-6 The present application provides another technical solution:

[0035] Compared with example one, the difference between example two and example one is that three gas trapping cavities 15 are arranged in the shell assembly, the three gas trapping cavities 15 are respectively located in the water inlet passage 3, the water inlet passage 5 and the mixed water passage 8, and the volume of the three gas trapping cavities 15 accounts for 15% to 20% of the total volume of the water inlet passage 3, the water inlet passage 5 and the mixed water passage 8.

[0036] Compared with example one, example two can independently buffer different passages by adopting the split type gas trapping cavity 15, and the anti-explosion reliability is improved by 50% in the local icing scene compared with the whole cavity, and it is suitable for complex low temperature environment.

[0037] In order to further illustrate the beneficial effects of the present application, the following comparative example is constructed.

[0038] Comparative example 1: the volume of the gas trapping cavity 15 is 5% of the total volume of the passage.

[0039] Analysis:

[0040] The buffer space is insufficient to accommodate the volume expansion of the frozen water body. When the air in the cavity is completely compressed during freezing, the remaining expansion pressure directly acts on the valve body wall surface, with a pressure of 1.8-2.2 MPa, and the valve body rupture rate is as high as 40%;

[0041] The cavity is too small to have no obvious interference to normal water flow, and the water flow resistance increases by ≤3%;

[0042] The cavity volume is small and easy to process, but it has no practical application value due to the failure of explosion protection.

[0043] Comparative Example 2: The volume of the trapped air cavity 15 is 12% of the total volume of the passage.

[0044] Analysis:

[0045] Part of the expansion amount can be absorbed, but the remaining amount is insufficient. At extremely low temperatures below-5℃, there is still 3% of the expansion amount that cannot be buffered after the water body is completely frozen, with a valve body wall surface pressure of 1.5-1.7 MPa, and a rupture rate of about 15%;

[0046] There is no obvious bubble or resistance during normal use, and the mixed water temperature regulation accuracy is maintained at ±1℃;

[0047] It is suitable for southern regions with occasional low temperatures, but it cannot meet the long-term low-temperature environment demand.

[0048] Comparative Example 3: The volume of the trapped air cavity 15 is 15% of the total volume of the passage.

[0049] Analysis:

[0050] 9% of the frozen expansion amount can be completely absorbed, and the remaining space is reserved for air compression redundancy. The valve body wall surface pressure is controlled at 1.0-1.2 MPa, and the rupture rate is 0;

[0051] The cavity is connected to the passage through a 1.5mm communication hole, and the air disturbance is small when the water flow impacts, with a flow loss of ≤5%, and no obvious bubble sound;

[0052] The cavity volume is moderate, and the top cover 2 is easy to form during casting, without spatial conflict with other parts.

[0053] Comparative Example 4: The volume of the trapped air cavity 15 is 18% of the total volume of the passage.

[0054] Analysis:

[0055] The buffer space is sufficient, the frozen expansion pressure is more evenly dispersed, the valve body wall surface pressure is reduced to 0.8-1.0 MPa, and there is no risk of rupture even at-15℃ low temperature;

[0056] The air compression amount is smaller, and the water flow disturbance can be ignored, with better mixed water stability than 15%;

[0057] Suitable for large-flow water mixing valves with sufficient internal space of valve body, strong compatibility.

[0058] Comparative Example 5: The volume of the air trapping cavity 15 is 20% of the total volume of the passage.

[0059] Analysis:

[0060] The buffering capacity is optimal, the pressure is only 0.6-0.8 MPa when icing, and it is suitable for long-term low temperature, such as-20℃ or below environment;

[0061] The cavity is too large, causing slight vortex when water flows through, with a flow loss of about 8%, but it does not affect the user experience;

[0062] The thickness of the top cover 2 needs to be increased to accommodate the cavity, and the casting difficulty is slightly higher than 15%, but it is still within the range of industrial production.

[0063] Comparative Example 6: Volume ratio of 25%

[0064] Parameter setting: The volume of the air trapping cavity 15 is 25% of the total volume of the passage.

[0065] Analysis:

[0066] The pressure is extremely low, ranging from 0.5-0.6 MPa, and the explosion-proof performance is excessive;

[0067] The cavity is too large, causing a large amount of air to mix into the water flow, producing obvious bubble sound, and the water temperature fluctuates ±2℃, affecting the user experience;

[0068] The internal layout of the valve body needs to be adjusted significantly, which may interfere with the water mixing valve 7 or the control valve, increasing the manufacturing cost by more than 30%, and there is no actual necessity.

[0069] In summary, the volume ratio of 15%-20% is the optimal range for balancing the explosion-proof effect, water flow performance and structural feasibility:

[0070] Below 15%, the explosion-proof reliability is insufficient and cannot cope with long-term low temperature;

[0071] Above 20%, although the explosion-proof effect is enhanced, it will cause the water flow stability to decrease, the structure cost to increase, and the cost performance to decrease;

[0072] In the range of 15%-20%, the ratio of about 18% performs best in various performances, and is suitable for most climate regions.

[0073] The working process of the embodiment is:

[0074] When installing:

[0075] The water mixing valve 7 is installed in the valve core cavity of the shell 1, fixed by a gland, with a pre-tightening torque of 15-20 N·m, to ensure that the valve core is in sealing alignment with the passage. The top cover 2 is fastened to the shell 1 by bolts or glue, ensuring that the compression amount of the sealing ring is 0.6-0.8 mm. At this time, the trapped air cavity 15 forms a closed space with the passage, retaining a predetermined amount of air. The control valve one 9, the control valve two 11, and the control valve three 13 are respectively connected to the shell assembly by threads. The valve stem is connected to the handle, ensuring that the switch stroke is 30°-90° to achieve complete on-off. The water inlet connector one 4 and the water inlet connector two 6 are connected to the cold and hot water pipes, respectively, and are wrapped with raw tape for sealing. The water outlet one 10, the water outlet two 12, and the water outlet three 14 are connected to the corresponding shower components. After passing the water leakage test, they are put into use.

[0076] In use:

[0077] Normal use state:

[0078] Open the corresponding control valve, rotate the water mixing valve 7 to adjust the water temperature. Cold water enters the water mixing valve 7 through the water inlet passage one 3, and hot water enters the water mixing valve 7 through the water inlet passage two 5. The air in the trapped air cavity 15 is slightly compressed by the water flow pressure, which does not affect the water flow rate.

[0079] Low-temperature anti-freezing state:

[0080] When the water temperature is lower than 0℃ in winter, the internal water body gradually freezes and expands, pushing the air in the trapped air cavity 15 to compress, providing a buffer space for the ice body. The expansion pressure is dispersed and released through the trapped air cavity 15. The actual pressure on the valve body wall surface is reduced to below 1.2 MPa, avoiding rupture. The design of the separate trapped air cavity 15 can buffer the expansion force of each passage, which is suitable for local ice formation scenarios.

[0081] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A water mixing system with anti-freeze cracking technology, comprising a shell assembly, a water mixing valve (7) is provided on one side of the shell assembly, a water inlet passage 1 (3), a water inlet passage 2 (5) and a water mixing passage (8) are provided in the shell assembly, the outlet sides of the water inlet passage 1 (3) and the water inlet passage 2 (5) are connected to the water mixing valve (7), and the outlet side of the water mixing valve (7) is connected to the water inlet side of the water mixing passage (8), characterized in that: At least one air-trapping cavity (15) is provided in the shell assembly, and the volume of the air-trapping cavity (15) accounts for 15% to 20% of the total volume of the first water inlet passage (3), the second water inlet passage (5) and the mixed water passage (8).

2. A water mixing system with anti-freeze cracking technology according to claim 1, characterized in that: The rear side of the shell assembly is provided with a water inlet connector 1 (4) connected to the water inlet passage 1 (3), and the rear side of the shell assembly is provided with a water inlet connector 2 (6) connected to the water inlet passage 2 (5).

3. The water mixing system with anti-freeze cracking technology according to claim 1, characterized in that: Two water outlets (10) are provided on the upper surface of the shell assembly, and a control valve (9) is provided on the shell assembly for controlling the mixed water in the mixed water passage (8) to flow through the water outlet (10).

4. The water mixing system with anti-freeze cracking technology according to claim 1, characterized in that: The bottom of the shell assembly is provided with a second water outlet (12) and a third water outlet (14), and the shell assembly is provided with a second control valve (11) and a third control valve (13) for controlling the mixed water in the mixed water passage (8) to flow through the second water outlet (12) and the third water outlet (14).

5. The water mixing system with anti-freeze cracking technology according to claim 1, characterized in that: The shell assembly comprises a shell (1) and a top cover (2), the air trapping cavity (15) is arranged on the lower surface of the top cover (2), and the water inlet passage 1 (3), the water inlet passage 2 (5) and the water mixing passage (8) are opened on the shell (1).

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