Temperature-limiting anti-scalding structure and shower

Abstract

The utility model provides a temperature-limiting anti-scalding structure and a shower, the anti-scalding structure comprises a shell, and the shell is provided with a water inlet, a water outlet and an inner cavity communicated with the water inlet and the water outlet. The moving part is arranged in the inner cavity in a sliding mode and comprises a temperature sensing part, the temperature sensing part can expand with heat and contract with cold, and the water breaking part is connected with the moving part and moves along with the moving part to block or open the water outlet. The first driving piece applies first thrust to the moving piece to drive the moving piece to move in the first direction and drive the water breaking piece to open the water outlet, the second driving piece is arranged at the end, facing the first direction, of the moving piece, and when the temperature sensing piece is heated to expand, second thrust in the first direction is generated on the second driving piece. The blocking piece is arranged at the end, away from the moving piece, of the second driving piece, the blocking piece and the shell are kept in a relatively static state without external force, and the second driving piece abuts against the blocking piece; and the second thrust counteracts on the moving part to push the moving part to move towards the opposite direction of the first direction and drive the water breaking part to block the water outlet, so that the problem of scalding caused by over-high water temperature of the water outlet is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bathroom, especially a temperature limiting scalding prevention structure and shower. BACKGROUND

[0002] In modern bathroom equipment, shower and faucet are indispensable water temperature adjusting devices in daily life, and their performance and user experience are directly related to the comfort and safety of users. The shower and faucet products widely used in the market generally adjust water temperature in two ways. One is to use a thermostatic valve with intelligent control technology, but these products usually rely on complex electronic components and external power supply, increasing the cost and risk of failure. The other is to rely on a built-in valve core structure to adjust the water temperature. This adjustment mechanism usually changes the water inlet area ratio of cold and hot water by rotating the valve core adjusting rod to achieve the purpose of mixing and adjusting the outlet water temperature.

[0003] However, such products that adjust water temperature by rotating the valve core adjusting rod have several significant problems: ① Insufficient temperature adjustment accuracy: the temperature adjustment stroke of some products is relatively short, and even a slight rotation during the adjustment process may cause a significant change in outlet water temperature, especially when approaching the set temperature limit, which increases the risk of scalding caused by excessively high outlet water temperature; ② Greatly affected by water inlet conditions: due to the differences in water pressure and initial temperature of cold and hot water, especially in cases where the water pressure difference is large or the water temperature itself is high, the existing valve core adjustment system cannot accurately control the outlet water temperature, often resulting in actual outlet water temperature higher than expected, further increasing the likelihood of scalding; ③ Lack of terminal temperature limiting protection: most existing products lack a mechanism to directly limit the temperature of the terminal outlet, relying entirely on user manual adjustment and valve core accuracy, which greatly limits the safety and ease of use of the product.

[0004] Therefore, there is an urgent need in the market for an outlet structure that not only significantly improves the accuracy and stability of water temperature adjustment, but also effectively avoids the problem of excessively high outlet water temperature caused by changes in water inlet conditions. SUMMARY

[0005] To solve the above problems, the purpose of the utility model is to provide a temperature limiting scalding prevention structure and shower, which uses the thermal expansion and contraction characteristics of a temperature sensing element to drive a water cutoff element to block the outlet when the water temperature is too high, thereby solving the problem of scalding caused by excessively high water temperature at the outlet.

[0006] The utility model realizes the following technical solutions:

[0007] A temperature limiting scalding prevention structure, comprising a housing having a water inlet, a water outlet, and an inner cavity communicating the water inlet and the water outlet, further comprising:

[0008] a moving member, which is slidingly arranged in the inner cavity, and a temperature sensing member arranged in the moving member and capable of thermal expansion and contraction;

[0009] a water cutting member, which is connected to the moving member and moves with the moving member to close or open the water outlet;

[0010] a first driving member, which applies a first pushing force to the moving member to drive the moving member to move towards a first direction and drive the water cutting member to open the water outlet;

[0011] a second driving member, which is arranged at one end of the moving member towards the first direction and generates a second pushing force in the first direction to the second driving member when the temperature sensing member is heated and expanded;

[0012] a blocking member, which is arranged at one end of the second driving member away from the moving member, and which remains relatively static with the shell under no external force, and the second driving member abuts against the blocking member; the second pushing force is applied to the moving member in the opposite direction of the first direction, and the second pushing force is sufficient to overcome the first pushing force and the friction between the water cutting member and the inner cavity, so as to drive the moving member to move towards the opposite direction of the first direction and drive the water cutting member to close the water outlet.

[0013] Further, the blocking member comprises a switching member, an end cover and a knob; the shell is provided with a third opening communicating with the inner cavity along the first direction, and the end cover is arranged at the third opening; one end of the second driving member abuts against the switching member, and the other end of the switching member penetrates through the end cover and is connected with the knob; the switching member has a first abutting portion, the end cover has a second abutting portion and a third abutting portion; when the knob is at a first position, the first abutting portion corresponds to the second abutting portion, when the knob is at a second position, the first abutting portion corresponds to the third abutting portion; the distance from the abutting end face of the third abutting portion to the second driving member is greater than the distance from the abutting end face of the second abutting portion to the second driving member.

[0014] Further, the switching member is provided with a first limiting portion, and the end cover is provided with a second limiting portion, and the first limiting portion and the second limiting portion cooperate to limit the rotation range of the knob.

[0015] Further, the first limiting portion is a protruding rib arranged on the switching member, the second limiting portion is an arc-shaped slot arranged on the end cover, and the protruding rib can slide in the arc-shaped slot.

[0016] Further, a torsion spring is arranged between the switching member and the end cover, and the torsion spring is in a torsion state when the knob is in the second position.

[0017] Further, the blocking member is provided with a receiving groove facing the end surface of the second driving member, and the end of the second driving member is arranged in the receiving groove to abut against the blocking member.

[0018] Further, the moving member is provided with a recess facing the end surface of the second driving member, and the end of the second driving member is arranged in the recess to abut against the moving member.

[0019] Further, the moving member comprises an outer shell and a filler arranged in the outer shell, and the filler can expand or contract with temperature change.

[0020] Further, the first driving member is an elastic member arranged between the moving member and the inner cavity wall away from the second driving member.

[0021] Further, the outer periphery of the water cutting member is provided with a sealing ring, and the sealing ring is always in contact with the wall of the inner cavity.

[0022] A shower comprising the temperature-limiting anti-scald structure.

[0023] Compared with the prior art, the technical scheme and beneficial effects of the present application are as follows:

[0024] (1) The temperature-limiting anti-scald structure of the present application can drive the moving member to move towards the first direction to open the water outlet when the water flow is at a normal temperature value, and can drive the moving member to move towards the first direction to block the water outlet when the water flow is at a high temperature value, thereby avoiding high-temperature water flow from flowing out to scald people and being affected by the flow or pressure of the water flow.

[0025] (2) The plugging piece of the utility model, through the knob driving the switching piece circumferential rotation, and through the first abutment portion respectively with the second abutment portion, the third abutment portion cooperation, switching piece can along the first direction removal, to removal 200 make room, so that removal under the action of the first driving piece towards the first direction removal, in turn drive the water cut-off piece towards the first direction removal, open the water outlet, the high temperature water flow is arranged away. So as to realize water cut-off, if want to restore water, on one hand can wait after water temperature reduces and restores water, on the other hand can also manually rotate and pull the knob, so that removal drive the water cut-off piece removal and lose water cut-off function, so as to arrange hot water, after the whole waterway again water.

[0026] (3) The utility model discloses switching piece and end cap still be provided with torsion spring, when the knob is at the second position, torsion spring is at torsion state, second abutment portion and third abutment portion between setting have slope. So that manually drain water is finished, loosen the knob, can automatically reset.

[0027] (4) The utility model discloses removal towards the end face of second driving piece is provided with recess, and the end of second driving piece is placed in recess and realizes the abutment with removal, on one hand can prevent second driving piece relative to removal inclination, on the other hand, when the temperature sensing element in removal is heated and expands, make stress be more concentrated at recess, so as to convert the expansion force of temperature sensing element into the second thrust to second driving piece. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the explosion map of the temperature-limiting scald-preventing structure provided by the utility model embodiment;

[0029] Figure 2 It is the cross-sectional view of the temperature-limiting scald-preventing structure water-passing state provided by the utility model embodiment;

[0030] Figure 3 It is the cross-sectional view of the temperature-limiting scald-preventing structure water-cutting state provided by the utility model embodiment;

[0031] Figure 4 It is the cooperation structure diagram of the plugging piece when normal working provided by the utility model embodiment;

[0032] Figure 5 It is the cooperation structure diagram of the plugging piece in manual drainage state provided by the utility model embodiment;

[0033] Figure 6 It is the cross-sectional view of the temperature-limiting scald-preventing structure when manually draining provided by the utility model embodiment;

[0034] Figure 7 It is the structure diagram of switching piece and end cap provided by the utility model embodiment.

[0035] ILLUSTRATION AND DESCRIPTION:

[0036] housing-100; water inlet-101; water outlet-102;

[0037] moving piece-200; first driving piece-210; second driving piece-220; groove-230;

[0038] water cutting piece-300; sealing ring-310;

[0039] switching piece-400; first abutting part-410; first limiting part-420; accommodating groove-430;

[0040] end cover-500; second abutting part-510; third abutting part-520; second limiting part-530; slope-540;

[0041] knob-600; torsional spring-610. DETAILED DESCRIPTION

[0042] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0043] Referring to Figures 1 to 3 A temperature-limiting anti-scald structure, comprising a housing 100, the housing has a water inlet 101, a water outlet 102, and an inner cavity communicating the water inlet 101 and the water outlet 102. It also includes a moving piece 200, a water cutting piece 300, a first driving piece 210, a second driving piece 220, and a plugging piece. The moving piece 200 is slidingly arranged in the inner cavity, and the moving piece 200 is provided with a temperature sensing piece capable of thermal expansion and contraction. When the water temperature rises or falls, the volume of the temperature sensing piece will change, thereby moving the moving piece 200. The water cutting piece 300 is connected with the moving piece 200, and the water cutting piece 300 moves with the moving piece 200 to block or open the water outlet 102. As Figure 2 and Figure 3 shown, when the water cutting piece 300 moves towards the arrow direction, the water cutting piece 300 opens the water outlet 102, and when the water cutting piece moves towards the opposite direction of the arrow, the water cutting piece 300 blocks the water outlet 102.

[0044] The first driving member 210 drives the moving member 200 to move towards the first direction (arrow direction) by applying a first pushing force to the moving member 200, and drives the water cutting member 300 to open the water outlet 102.

[0045] The second driving member 220 is arranged at one end of the moving member 200 towards the first direction, and a second pushing force in the first direction is generated on the second driving member 220 when the temperature sensing member in the moving member 200 is heated and expanded. The blocking member is arranged at the end of the second driving member 220 away from the moving member 200, and the blocking member is in a relatively static state with the shell under no external force. The moving member 200 abuts against the blocking member.

[0046] When the temperature sensing member in the moving member 200 is heated and expanded, the second pushing force acts on the blocking member through the second driving member 220. Since the blocking member is in a static state, the second pushing force acts on the moving member 200 through the second driving member 220, so that the moving member 200 has a movement trend of moving in the opposite direction of the first direction. When the second pushing force is sufficient to overcome the first pushing force and the friction between the water cutting member 300 and the inner cavity, the moving member 200 is pushed to move in the opposite direction of the first direction, and the water cutting member 300 is driven to block the water outlet 102. It is worth noting that the sizes of the first pushing force and the second pushing force change in real time. When the first pushing force, the second pushing force and the friction force are dynamically balanced, the water cutting member 300 stops moving.

[0047] In the embodiment, the first driving member 210 is a spring arranged between the moving member 200 and the inner cavity wall away from the second driving member.

[0048] The temperature limiting and anti-scalding structure is arranged at the water outlet of a shower or faucet. When the water temperature is too high (exceeding a threshold value), the temperature sensing member in the moving member 200 is heated and expanded, the water cutting member 300 is moved, and the water outlet is blocked to prevent high-temperature water flow from flowing out to scald, and the flow or pressure of the water flow has no effect. When the water temperature decreases, the temperature sensing member is contracted, and the water cutting member 300 is driven to move towards the first direction under the action of the first driving member 210, so as to open the water outlet 102 again.

[0049] How to define the water temperature is too high, that is, the temperature threshold setting of the outlet 102 blockage, can be changed by adjusting the formula of the temperature sensing piece, the formula of the temperature sensing piece is adjusted, so that the expansion of the temperature sensing piece in the moving piece 200 at the preset temperature value causes the displacement of the water cutting piece 300 to just block the outlet 102. The moving piece of the embodiment includes a shell and a temperature sensing piece arranged in the shell, for example, a copper shell filled with paraffin, and the water cutting temperature is changed by adjusting the formula of the paraffin. It can also be changed by changing the distance between the water cutting piece 300 and the end surface of the outlet 102, for example, the original setting water temperature is 50 degrees, the expansion volume S1 of the temperature sensing piece in the moving piece 200 drives the water cutting piece 300 to move L1, and the outlet is blocked; now want to realize the water temperature of 45 degrees, then need to reduce the distance between the water cutting piece 300 and the outlet 102, so that the expansion volume S2 (S2 < S1) of the temperature sensing piece in the moving piece 200 at the water temperature of 45 degrees drives the water cutting piece 300 to move L2 (L2 < L1) Displacement can block the outlet.

[0050] In the embodiment, the outer periphery of the water cutting piece 300 is provided with a sealing ring 310, which always contacts the wall of the inner cavity, so as to prevent water from seeping into the space between the moving piece 200 and the blocking piece, thereby interfering with the water cutting temperature.

[0051] Referring to Figure 4 and Figure 5 , the blocking piece includes a switching piece 400, an end cover 500 and a knob 600. The shell 100 is provided with a third opening communicating with the inner cavity in the first direction, and the end cover 500 is arranged in the third opening. In the embodiment, the end cover 500 is connected with the shell 100 by threads. The second driving piece 220 abuts against one end of the switching piece 400, and the other end of the switching piece 400 penetrates through the end cover 500 and is connected with the knob 600, that is, rotating the knob 600 can drive the switching piece 400 to rotate relative to the end cover 500 and the shell 100.

[0052] The switching piece 400 has a first abutting portion 410, and the end cover 500 has a second abutting portion 510 and a third abutting portion 530. When the knob 600 is in the first position (when the switching piece 400 is in the first position), the first abutting portion is opposite to the second abutting portion. When the knob 600 is in the second position (when the switching piece 400 is rotated to the second position), the first abutting portion 410 corresponds to the third abutting portion 520. The distance from the abutting end face of the third abutting portion 520 to the second driving piece 220 is greater than the distance from the abutting end face of the second abutting portion 510 to the second driving piece 220.

[0053] In the normal state, the knob 600 is located in the first position, and the first abutting portion 410 abuts against the second abutting portion 510, as shown in Figure 4. Turn the knob (e.g. clockwise) to the second position, so that the first abutting part 410 corresponds to the third abutting part 520, and pull the knob towards the first direction, which drives the switching piece to move towards the first direction, as shown in Figure 6 . The switching piece 400 gives way to the second driving piece 220, and the reaction force of the second pushing force acting on the moving piece 200 decreases. Under the action of the first driving piece, the moving piece 200 also moves towards the first direction, thereby driving the water cutoff piece 300 to gradually open the water outlet 102 to discharge the high-temperature water flow. During the process of pulling the knob 600 towards the first direction, the first abutting part 410 gradually approaches the third abutting part 520 to abut against each other, and the height difference H between the abutting end face of the third abutting part and the abutting end face of the second abutting part in the first direction is the maximum displacement S of the switching piece 400 moving towards the first direction, as shown in Figure 5 .

[0054] Similarly, after the high-temperature water is discharged, the knob is pushed to move towards the first direction, so that the first abutting part 410 gradually separates from the third abutting part 520, and moves at least a displacement H. Then, the knob is reversely (counterclockwise) turned, so that the first abutting part 410 corresponds to the second abutting part 510, and the knob 600 is loosened. Under the action of the second pushing force, the first abutting part 410 abuts against the second abutting part 510, and the sealing piece returns to the state of being relatively stationary with the shell 100.

[0055] In the embodiment, a torsion spring 610 is further arranged between the switching piece 400 and the end cover 500. When the knob 600 is in the second position, the torsion spring 610 is in a torsion state, and a slope 540 is arranged between the second abutting part 510 and the third abutting part 520. After the high-temperature water is discharged, the knob 600 is loosened, and the restoring deformation force of the torsion spring 600 acts on the slope 540, so that the first abutting part 410 gradually moves along the slope 540 towards the second abutting part 510 until finally resets (the first abutting part 410 abuts against the second abutting part 510).

[0056] Referring to Figure 7 , the switching piece 400 is provided with a first limiting part 420, and the end cover 500 is provided with a second limiting part 530. The first limiting part 420 and the second limiting part 530 cooperate to limit the rotation range of the knob 600. Specifically, the first limiting part 420 is a protruding rib arranged on the switching piece 400, and the second limiting part 530 is an arc-shaped groove arranged on the end cover. The sliding range of the protruding rib along the arc-shaped groove is the rotation angle of the knob 600.

[0057] It can be understood that the knob 600 is rotated from the first position to the second position, and when the convex rib slides along the arc-shaped groove to the end of the arc-shaped groove, the first abutting portion 410 corresponds to the third abutting portion 530. The cooperation of the second limiting portion 530 and the first limiting portion 420 has a positioning effect. When draining, rotating the knob drives the convex rib to slide to the end of the arc-shaped groove, and the knob can be pulled in the first direction, which is convenient to operate.

[0058] Continuing to refer to Figure 1 and 2 The switching piece 400 is provided with a containing groove 430 facing the end surface of the second driving piece 220, and the end of the second driving piece 220 is arranged in the containing groove 430 to abut against the switching piece 400. Through the cooperation of the second driving piece 220 and the containing groove 430, the second driving piece 220 is prevented from tilting during movement, that is, the direction of the second pushing force is always in the first direction.

[0059] The end surface of the moving piece 200 is provided with a groove 230 facing the second driving piece 220, and the end of the second driving piece 220 is arranged in the groove 230 to abut against the moving piece 200. The groove 230 is arranged on one hand to prevent the second driving piece 220 from tilting relative to the moving piece 200, and on the other hand, when the temperature sensing piece in the moving piece 200 expands due to heat, the stress is concentrated at the groove 230, so that the second driving piece is gradually pushed out of the groove 230, and then the expansion force of the temperature sensing piece in the moving piece 200 is converted into the second pushing force of the second driving piece 220. In other embodiments, the shell in the groove 230 region can be made thinner than the shell in other regions of the moving piece, so that when the temperature sensing piece in the moving piece 200 expands due to heat, the stress is concentrated in the thin-walled region (groove region).

[0060] The embodiment also provides a shower comprising the temperature-limiting anti-scald structure.

[0061] The above description shows and describes the preferred embodiments of the utility model, and it should be understood that the utility model is not limited to the forms disclosed in this paper, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept in this paper through the above teaching or related technical or knowledge. The modification and change made by the person skilled in the art without departing from the spirit and scope of the utility model should be within the protection scope of the claims attached to the utility model.

Claims

1. A temperature limiting scald-prevention structure comprising a housing having a water inlet, a water outlet, and an inner cavity communicating the water inlet and the water outlet, characterized in that, Also comprising: a moving piece, which is slidingly arranged in the inner cavity, and is internally provided with a temperature sensing piece capable of thermal expansion and contraction; a water cutting piece, which is connected with the moving piece and moves with the moving piece to block or open the water outlet; a first driving piece, which drives the moving piece to move towards a first direction by applying a first pushing force to the moving piece, and drives the water cutting piece to open the water outlet; a second driving piece, which is arranged at one end of the moving piece towards the first direction, and generates a second pushing force in the first direction to the second driving piece when the temperature sensing piece is heated and expanded; a blocking piece, which is arranged at one end of the second driving piece away from the moving piece, and keeps a relatively static state with the shell without external force, and the second driving piece abuts against the blocking piece; the second pushing force is applied to the moving piece in the opposite direction of the first direction, and is sufficient to overcome the first pushing force and the friction between the water cutting piece and the inner cavity, so as to drive the moving piece to move towards the opposite direction of the first direction, and drive the water cutting piece to block the water outlet.

2. The temperature limiting scald protection structure of claim 1, wherein, The blocking piece comprises a switching piece, an end cover and a knob; the shell is provided with a third opening along the first direction, which communicates with the inner cavity, and the end cover is arranged at the third opening; one end of the second driving piece abuts against the switching piece, and the other end of the switching piece passes through the end cover and is connected with the knob; The switching piece has a first abutting portion, the end cover has a second abutting portion and a third abutting portion; when the knob is in a first position, the first abutting portion corresponds to the second abutting portion, and when the knob is in a second position, the first abutting portion corresponds to the third abutting portion; The distance from the abutting end face of the third abutting portion to the second driving piece is greater than the distance from the abutting end face of the second abutting portion to the second driving piece.

3. The temperature limiting scald protection structure of claim 2, wherein, The switching piece is provided with a first limiting portion, and the end cover is provided with a second limiting portion; the first limiting portion cooperates with the second limiting portion to limit the rotation range of the knob.

4. The temperature limiting scald protection structure of claim 3, wherein, The first limiting portion is a protruding rib arranged on the switching piece, the second limiting portion is an arc-shaped groove arranged on the end cover, and the protruding rib can slide in the arc-shaped groove.

5. The temperature limiting scald protection structure of claim 2, wherein, A torsional spring is further arranged between the switching piece and the end cover; when the knob is in the second position, the torsional spring is in a torsional state; and a slope is arranged between the second abutting portion and the third abutting portion.

6. The temperature limiting scald protection structure of claim 1, wherein, An accommodation groove is arranged on the end face of the blocking piece towards the second driving piece, and the end portion of the second driving piece is arranged in the accommodation groove to abut against the blocking piece.

7. The temperature limiting scald protection structure of claim 1, wherein, A groove is arranged on the end face of the moving piece towards the second driving piece, and the end portion of the second driving piece is arranged in the groove to abut against the moving piece.

8. The temperature limiting scald protection structure of claim 1, wherein, The first driving piece is an elastic piece arranged between the inner cavity walls on the side of the moving piece away from the second driving piece.

9. The temperature limiting scald protection structure of claim 1, wherein, A sealing ring is arranged on the outer circumferential side of the water cutting piece, and the sealing ring always contacts the wall of the inner cavity.

10. A shower, characterised in that The temperature limiting and anti-scald structure comprises any one of claims 1 to 9.

Images