An anti-scalding shower head

Abstract

The present invention relates to an anti-scalding shower head, which comprises a body, a temperature-sensing core assembly, a water passing plate and a face cover. The temperature-sensing core assembly includes a damping piece, a temperature-sensing metal elastic piece, a diaphragm support piece and a diaphragm. A damping hole is formed on one side of the temperature-sensing core assembly. The surface of the temperature-sensing metal elastic piece is an arc surface structure. The temperature-sensing metal elastic piece includes two metal pieces with different thermal expansion coefficients. The damping piece is connected to the body through a spring. The temperature-sensing metal elastic piece is fixed between the damping piece and the diaphragm support piece. A drain hole is formed in the middle of the diaphragm support piece. The diaphragm is clamped below the diaphragm support piece. The temperature-sensing core assembly is tightly abutted against the water passing plate under the action of the spring. This patent controls the position of the temperature-sensing core assembly through temperature, and then controls the on-off of the water path. When the cold water suddenly loses supply or the amount of hot water entering the shower head suddenly increases, resulting in a sudden temperature rise, the shower head will immediately pause the water flow to prevent the water from flowing out and scalding the user, effectively improving the safety and convenience of the shower head.

Description

Technical Field

[0001] The invention relates to the technical field of shower equipment, and in particular to an anti-scalding shower head. Background Art

[0002] Shower heads are common appliances in bathrooms. Shower heads are usually installed in the bathroom for showering and can be connected to various water heaters. Shower products are divided into constant temperature shower products and non-constant temperature shower products. When using non-constant temperature shower products, today's shower heads do not have the ability to limit the temperature. When adjusting the water temperature or when the cold water supply is cut off, it may scald the user. In addition, the user needs to adjust the shower water temperature several times during use until the shower water is not hot enough to get the right temperature. It is troublesome to adjust the water temperature to the right temperature, which leads to corresponding limitations in its use, and further improvement is needed. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide an anti-scalding shower head.

[0004] The present invention is achieved through the following technical solutions:

[0005] A scald-proof showerhead, characterized in that it comprises a body, a temperature-sensitive core assembly, a water tray and a surface cover, the temperature-sensitive core assembly comprises a damping plate, a temperature-sensitive metal spring sheet, a diaphragm support sheet and a diaphragm, a damping hole is opened on one side of the temperature-sensitive core assembly, the surface of the temperature-sensitive metal spring sheet is an arc surface structure, the temperature-sensitive metal spring sheet comprises two metal sheets with different thermal expansion coefficients, the damping plate is connected to the body through a spring, the temperature-sensitive metal spring sheet is fixed between the damping plate and the diaphragm support sheet, a leakage hole is opened in the middle of the diaphragm support sheet, an O-ring is provided around the leakage hole on the surface of the diaphragm support sheet, the diaphragm is clamped under the diaphragm support sheet, and the temperature-sensitive core assembly is tightly abutted against the water tray under the action of the spring.

[0006] According to the above technical solution, preferably, the upper end of the spring is bent vertically downward to form an extension portion, and the extension portion is arranged through the damping hole.

[0007] According to the above technical solution, preferably, a plurality of limiting posts are evenly fixedly connected to the lower surface of the diaphragm support sheet along the circumferential direction, a plurality of limiting holes are opened on the surface of the diaphragm relative to the positions of the limiting posts, and each of the limiting posts is arranged to pass through the limiting holes.

[0008] According to the above technical solution, preferably, the end of the limiting column protrudes outward to form a clamping portion, and the diaphragm is clamped under the diaphragm support sheet through the limiting column.

[0009] According to the above technical solution, preferably, four limiting columns and four limiting holes are provided respectively.

[0010] According to the above technical solution, preferably, an inner positioning ring is provided along the circumferential direction at the edge of the damping piece, an outer positioning ring is provided along the circumferential direction at the edge of the diaphragm support piece, and the inner positioning ring is clamped with the outer positioning ring.

[0011] According to the above technical solution, preferably, a positioning groove is opened downward in the middle of the diaphragm support piece, the drain hole is arranged in the positioning groove, and the O-ring is fixedly connected in the positioning groove.

[0012] The beneficial effects of the present invention are as follows:

[0013] First, the bouncing state of the temperature-sensitive metal shrapnel is controlled by temperature, thereby controlling the position of the temperature-sensitive core assembly, and further controlling the on-off of the water path. When the cold water suddenly loses supply or the amount of hot water entering the shower head suddenly increases, resulting in a sudden increase in temperature, the shower head will immediately pause the water flow to prevent the water from flowing out and scalding the user; Second, it allows users to adjust the temperature with confidence, more conveniently and quickly adjust to the appropriate temperature, avoid scalding caused by changes in the water supply system, and improve the safety and convenience of the shower head; Third, it has a wide range of applications and can be universally matched with all non-constant temperature shower products. Only by replacing this shower head can the non-constant temperature shower products have the anti-scalding function. Description of the Drawings

[0014] Figure 1 is the front view structural explosion diagram of the present invention.

[0015] Figure 2 is the three-dimensional structural schematic diagram of the damping piece part of the present invention.

[0016] Figure 3 is the three-dimensional structural schematic diagram of the front side of the diaphragm support piece of the present invention.

[0017] Figure 4 is the three-dimensional structural schematic diagram of the bottom surface of the diaphragm support piece of the present invention.

[0018] Figure 5 is the three-dimensional structural schematic diagram of the diaphragm part of the present invention.

[0019] Figure 6 is the three-dimensional structural schematic diagram of the water passing tray part of the present invention.

[0020] Figure 7 is the front view structural sectional diagram of the temperature-sensitive core assembly part when the water temperature is lower than the critical temperature.

[0021] Figure 8 is the front view structural sectional diagram of the present invention when no water is passed or the water temperature is higher than the critical temperature.

[0022] Figure 9 is the front view structural sectional diagram of the present invention when the water temperature is lower than the critical temperature.

[0023] In the figure: 1. Body; 2. Spring; 3. Damper plate; 4. Temperature-sensitive metal shrapnel; 5. O-ring; 6. Diaphragm support plate; 7. Diaphragm; 8. Sealing ring; 9. Water passing plate; 10. Face cover; 11. Limit post; 12. Limit hole; 13. Special-shaped groove; 14. Damper hole; 15. Drain hole; 16. Temperature-sensitive core assembly; 17. Water pressure chamber. Detailed implementation mode

[0024] In order to enable those skilled in the art of this technical field to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and the best embodiments.

[0025] As shown in the figure, the present invention includes a body 1, a temperature sensing core assembly 16, a water tray 9 and a cover 10. The cover 10 is connected to the body 1 by fixing bolts. The temperature sensing core assembly 16 and the water tray 9 are arranged between the body 1 and the cover 10. A sealing member is provided at the connection position between the cover 10 and the body 1. In addition, a bead spring 2 can be provided according to the design requirements of different products to change different water outlet modes. The water tray 9 includes a water inlet hole and a water outlet hole. A special-shaped groove 13 is provided at the water inlet hole of the water tray 9. A sealing ring 8 is provided in the special-shaped groove 13. The sealing ring 8 is used to isolate the water inlet hole. The temperature sensing core assembly 16 includes a damping plate 3, a temperature sensing metal spring 4, a diaphragm support plate 6 and a diaphragm 7. A damping hole 14 is provided on one side of the temperature sensing core assembly 16. The surface of the temperature sensing metal spring 4 is a curved surface structure. The temperature sensing metal spring 4 includes two layers of metal sheets, and the two metal sheets have different thermal expansion coefficients, which are divided into an active layer and a passive layer. When the temperature changes to a critical temperature T2, the deformation of the active layer is greater than the deformation of the passive layer, so that the bimetallic sheet as a whole will bend toward the passive layer side, and the curvature of the composite material changes. Thus, deformation occurs, the critical temperature T2 and the recovery temperature T1 are not equal, and the critical temperature T2 is greater than the recovery temperature T1. The critical temperature T2 and the recovery temperature T1 are different according to the model of the temperature-sensitive metal spring 4. The critical temperature T2 of the selected temperature-sensitive metal spring 4 is greater than the recovery temperature T1 and the normal temperature. The temperature-sensitive metal spring 4 can form a reciprocating cycle according to the change of the hot water temperature. At this time, it is in an upward bouncing state at normal temperature. The damping plate 3 is connected to the body 1 through the spring 2. The temperature-sensitive metal spring 4 is fixed between the damping plate 3 and the diaphragm support plate 6. A leakage hole 15 is opened in the middle of the diaphragm support sheet 6, and an O-ring 5 is provided around the leakage hole 15 on the surface of the diaphragm support sheet 6. The diaphragm 7 is clamped under the diaphragm support sheet 6. The temperature sensing core component 16 is tightly abutted against the water tray 9 by the action of the spring 2. The edge of the diaphragm 7 is pressed and sealed by the body 1 and the water tray 9. A water pressure chamber 17 is formed between the temperature sensing core component 16 and the body 1. When no water is passed, the temperature sensing core component 16 is pressed and sealed on the water tray 9 by the spring 2 to avoid some water leaking out and scalding the user at the moment when the over-scalding water is passed. When water with a temperature lower than the critical temperature T2 is introduced, the temperature-sensitive metal spring 4 contacts the water flow, and the temperature of the water flow is transmitted to the temperature-sensitive metal spring 4, so that the temperature-sensitive metal spring 4 remains in an upward bouncing state. At this time, the temperature-sensitive metal spring 4 is separated from the O-ring 5. When water with a temperature higher than the critical temperature T2 is introduced, the temperature-sensitive metal spring 4 contacts the water flow, and the temperature of the water flow is transmitted to the temperature-sensitive metal spring 4, so that the temperature-sensitive metal spring 4 is in a downward bouncing state. At this time, the temperature-sensitive metal spring 4 contacts and seals the O-ring 5.

[0026] The specific working principle of this patent is as follows: When water with a temperature lower than the critical temperature T2 is introduced, the water enters the temperature-sensing core assembly 16 through the gap between the damping hole 14 and the spring 2. The temperature-sensing metal shrapnel 4 contacts the water temperature. Since the temperature is lower than the critical temperature T2, it does not deform and remains in the upward springing state. At this time, the temperature-sensing metal shrapnel 4 is separated from the O-ring 5. Since the cross-sectional area of the drain hole 15 is larger than the cross-sectional area of the gap between the damping hole 14 and the spring 2, the speed of the water flowing out of the temperature-sensing core assembly 16 is greater than the speed of entry. The water pressure in the water pressure chamber 17 decreases from the inlet pressure P1 to be consistent with the external pressure P2. At this time, P1*S1 > P2*S2 + F spring, where the contact area between the temperature-sensing core assembly 16 and the water passing plate 9 is S1, the horizontal cross-section of the water pressure chamber 17 is S2. The temperature-sensing core assembly 16 moves upward under the water pressure and remains in a force-balanced position. The temperature-sensing core assembly 16 is separated from the water passing plate 9, and the water can flow out from the channel between the temperature-sensing core assembly 16 and the water passing plate 9 from the inlet hole to the outlet hole, and the shower head discharges water normally. When water with a temperature higher than the critical temperature T2 is introduced, the temperature-sensing metal shrapnel 4 contacts the water temperature and instantly deforms, bouncing downward and sealing with the O-ring 5. The drain hole 15 is blocked. The water enters the water pressure chamber 17 through the gap between the damping hole 14 and the spring 2 and accumulates in the water pressure chamber 17 until the water pressure in the water pressure chamber 17 is equal to P1. Since at this time P1*S2 + F spring > P1*S1, where the contact area between the temperature-sensing core assembly 16 and the water passing plate 9 is S1, the horizontal cross-section of the water pressure chamber 17 is S2. The temperature-sensing core assembly 16 is pressed against and sealed with the water passing plate 9, and no water flows out, effectively preventing scalding. Only when the water temperature drops below the recovery temperature T1, the temperature-sensing metal shrapnel 4 bounces upward, and the normal water discharge can be restored.

[0027] According to the above technical solution, preferably, the upper end of the spring 2 is vertically bent downward to form an extension part, and the extension part penetrates through the damping hole 14, which can prevent the damping hole 14 from being blocked when the temperature-sensing core assembly 16 moves.

[0028] According to the above technical solution, preferably, a plurality of limiting columns 11 are fixedly connected to the lower surface of the diaphragm support piece 6 along the circumference. A plurality of limiting holes 12 are opened on the surface of the diaphragm 7 at positions corresponding to the respective limiting columns 11. Each of the limiting columns 11 penetrates through the limiting holes 12. The end of the limiting column 11 protrudes outward to form a clamping part. The diaphragm 7 is clamped below the diaphragm support piece 6 through the limiting columns 11 to fix the position of the diaphragm 7. In this example, 4 limiting columns 11 and 4 limiting holes 12 are respectively provided.

[0029] According to the above technical solution, preferably, an inner positioning ring is provided along the circumferential direction at the edge of the damping piece 3, and an outer positioning ring is provided along the circumferential direction at the edge of the diaphragm support piece 6. The inner positioning ring is clamped with the outer positioning ring. In this example, two clamping plates are oppositely provided on the inner positioning ring, and the ends of the two clamping plates protrude outward to form clamping blocks. Clamping holes are respectively formed on the surface of the outer positioning ring at the positions of the clamping blocks of the clamping plates. The inner positioning ring is clamped with the outer positioning ring through the clamping plates, so as to position the temperature-sensitive metal elastic piece 4 between the damping piece 3 and the diaphragm support piece 6, limit the position of the temperature-sensitive metal elastic piece 4, and prevent it from shifting.

[0030] According to the above technical solution, preferably, a positioning groove is opened downward in the middle of the diaphragm support piece 6. The horizontal cross-section of the positioning groove is circular. The drain hole 15 is arranged in the positioning groove, and the O-ring 5 is fixedly connected in the positioning groove. In this example, the upper surface of the O-ring 5 is higher than the bottom surface of the diaphragm support piece 6. When water with a temperature higher than the critical temperature T2 is introduced, the temperature-sensitive metal elastic piece 4 is in a state of bouncing downward. At this time, the temperature-sensitive metal elastic piece 4 is tightly connected and sealed with the O-ring 5.

[0031] This patent has the following beneficial effects: First, the bouncing state of the temperature-sensitive metal elastic piece 4 is controlled by temperature, so as to control the position of the temperature-sensitive core assembly 16, and further control the on-off of the water path. When the cold water suddenly loses supply or the amount of hot water entering the shower head increases violently, resulting in a sudden increase in temperature, the shower head will immediately pause the water flow to prevent the water from flowing out and scalding the user; Second, it allows users to rest assured to adjust the temperature, and it is more convenient and quick to adjust to a suitable temperature, avoiding scalding of the human body caused by changes in the water supply system, and improving the safety and convenience of the shower head; Third, it has a wide range of applications and can be universally matched with all non-thermostatic shower products. Only by replacing this shower head can the non-thermostatic shower products have the function of preventing scalding.

[0032] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An anti-scalding shower head, characterized in that, it comprises a body, a temperature-sensing core assembly, a water passing tray and a face cover. The temperature-sensing core assembly includes a damping piece, a temperature-sensing metal elastic piece, a diaphragm support piece and a diaphragm. A damping hole is formed on one side of the temperature-sensing core assembly. The surface of the temperature-sensing metal elastic piece is an arc surface structure. The temperature-sensing metal elastic piece includes two metal pieces with different coefficients of thermal expansion. The damping piece is connected to the body through a spring. The upper end of the spring is vertically bent downward to form an extension part. The extension part penetrates through the damping hole. The temperature-sensing metal elastic piece is fixed between the damping piece and the diaphragm support piece. A drain hole is formed in the middle of the diaphragm support piece. An O-ring is arranged around the drain hole on the surface of the diaphragm support piece. The diaphragm is clamped below the diaphragm support piece. The temperature-sensing core assembly is closely abutted against the water passing tray under the action of the spring. A plurality of limiting columns are uniformly fixed along the circumference on the lower surface of the diaphragm support piece. A plurality of limiting holes are formed in the diaphragm surface at positions corresponding to the limiting columns. Each limiting column penetrates through the limiting hole. An inner positioning ring is arranged along the circumference at the edge of the damping piece. An outer positioning ring is arranged along the circumference at the edge of the diaphragm support piece. The inner positioning ring is clamped with the outer positioning ring.

2. The anti-scalding shower head according to claim 1, characterized in that, a clamping part protrudes outward at the end of the limiting column, and the diaphragm is clamped below the diaphragm support piece through the limiting column.

3. The anti-scalding shower head according to claim 1 or 2, characterized in that, both the limiting columns and the limiting holes are provided with 4.

4. The anti-scalding shower head according to claim 1, characterized in that, a positioning groove is formed downward in the middle of the diaphragm support piece, the drain hole is arranged in the positioning groove, and the O-ring is fixed in the positioning groove.

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