Closable cold water discharge structure

Abstract

The present invention provides a closable cold water drain structure, which belongs to the technical field of shower equipment. It solves the problem of the inconvenience of using the cold water drain function. The closable cold water drain structure includes a shell having a water inlet and a water outlet, a temperature sensing component is provided in the shell, and a drainage hole is also provided on the side of the shell. The temperature sensing component can detect the high and low temperature of the medium in the shell and move, and after the temperature sensing component moves, one of the water outlet and the drainage hole can be connected to the water inlet. The outer side of the shell is also provided with a cylindrical opening and closing cylinder, and an opening and closing mechanism is provided between the temperature sensing component and the opening and closing cylinder. The opening and closing mechanism can drive the temperature sensing component to move and block the drainage hole after the opening and closing cylinder rotates circumferentially. The closable cold water drain structure has the advantage of being easy to use.

Description

Technical Field

[0001] The invention belongs to the technical field of shower equipment and relates to a closable cold water discharge structure. Background Art

[0002] Showers are the most commonly used showering device in daily life. As living standards continue to improve, people's demand for shower comfort and convenience is growing. For example, in winter, although most homes have water heaters, a large amount of cold water remains in the pipes between the water heater and the shower. People often need to pre-drain the water before showering to remove the remaining cold water, and then manually test the water temperature to determine whether it is suitable for a shower, which is inconvenient. Some users may also choose the wrong outlet route when draining cold water, resulting in cold water directly pouring on them, compromising convenience and comfort.

[0003] To this end, people have designed a control valve and a switching valve device with a cold water discharge function, and applied for a Chinese patent with the application number: 201510022883.0; its announcement number: CN105840908B; the control valve and the switching valve device with a cold water discharge function include a valve body part, which is provided with a water inlet and a water outlet; a piston, which can be slidably connected in the valve body part and the sliding direction is X-direction; a slide tube, which is sealed and slidably connected in the valve body part along the X-direction; a temperature sensing part and a back pressure spring, the temperature sensing part can sense the water flowing through the valve body part to generate deformation, and the temperature sensing part can press against the piston through the deformation to generate a pushing force to open the on-off channel; a handle mechanism, which is movably connected to the valve body part and is transmission-connected to the slide tube, so that the slide tube can be driven to slide by the movement of the handle mechanism. In the control valve and switching valve device with cold water discharge function, the temperature of the water flow is sensed by the temperature-sensing part to control the on and off of the water flow by deformation. When the cold water is drained and the water temperature rises, the water flow stops, providing a more intuitive prompt for the user.

[0004] However, when the above-mentioned control valve and switching valve device with cold water discharge function is in use, if cold water is always discharged, the cold water discharge state can be maintained stably. If hot water is needed, the water discharge will automatically stop after the residual cold water in the pipeline is drained. The user needs to manually operate the handle again to discharge hot water, which is not convenient to use. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to propose a closable cold water discharge structure to solve the problem of the inconvenience of using the cold water discharge function.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A closable cold water discharge structure includes a shell having a water inlet and a water outlet, a temperature sensing component being arranged in the shell, and is characterized in that a drainage hole is also provided on the side of the shell, the temperature sensing component can detect the high and low temperature of the medium in the shell and move, and after the temperature sensing component moves, one of the water outlet and the drainage hole can be connected to the water inlet, and a cylindrical opening and closing cylinder is also provided on the outside of the shell, and an opening and closing mechanism is provided between the temperature sensing component and the opening and closing cylinder, and the opening and closing mechanism can drive the temperature sensing component to move and block the drainage hole after the opening and closing cylinder rotates circumferentially.

[0008] This closable cold water discharge structure can be connected to the pipes of a shower device or used in the shower device. When in use, the temperature sensing component detects the temperature of the medium entering the housing and connects one of the water outlet and the drain hole to the water inlet. For example, when the temperature is low, the temperature sensing component connects the drain hole to the water inlet and closes the water outlet, and the liquid medium is discharged from the drain hole. When the temperature is high, the temperature sensing component moves, connects the water inlet to the water outlet and closes the drain hole, and the liquid medium flows out from the water outlet to the water outlet of the shower device. When only cold water is used in summer, the opening and closing cylinder can be rotated, and the opening and closing mechanism actively drives the temperature sensing component to move and block the drain hole. At this time, the liquid medium entering the closable cold water discharge structure can flow directly from the water outlet without being controlled.

[0009] This closable cold water drain structure features two independent water paths for outlet and drain. In autumn and winter, the temperature sensing component's autonomous detection and movement automatically selects one of the water paths, draining the cold water from the pipe. This eliminates the need for additional operation and is convenient to use. In summer, the cold water drain function can be manually turned off by turning the opening and closing cylinder. This single adjustment is sufficient for extended use, making it even more convenient. Furthermore, this closable cold water drain structure can be installed anywhere in the pipe, depending on the user or location.

[0010] In the above-mentioned closable cold water discharge structure, the opening and closing mechanism includes an adjusting portion provided on the temperature sensing component, an adjusting surface located on the opening and closing cylinder, and a limiting portion located on the opening and closing cylinder or the shell. The adjusting portion extends from the side of the shell, and the position of the adjusting surface corresponds to the position of the adjusting portion, and the adjusting surface is tilted relative to the axis of the opening and closing cylinder. When the opening and closing cylinder rotates circumferentially, the adjusting portion can move along the adjusting surface and drive the temperature sensing component to move, and the limiting portion can limit the moving adjusting portion when the drain hole is blocked. By coordinating the adjusting surface with the adjusting portion connected to the temperature sensing component, the force of the circumferential rotation is gradually converted into a force to move the temperature sensing component during the circumferential rotation of the opening and closing cylinder. Compared with directly pulling the temperature sensing component to move, the required force is smaller, the adjustment process is easier, and it is more convenient to use. The setting of the limiting portion can prevent the temperature sensing component from resetting after the drain hole is blocked, thereby ensuring the reliability and stability of the cold water discharge function.

[0011] In the above-mentioned closable cold water discharge structure, the adjustment portion includes an opening and closing spring and an adjustment column. A guide cover is fixed to the side of the shell. An adjustment hole is formed on the guide cover at a position corresponding to the position of the adjustment column. The adjustment column partially passes through the guide cover under the elastic force of the opening and closing spring. The limiting portion includes a recessed hole located on the inner side of the opening and closing cylinder, and the outer end of the adjustment column can extend into the recessed hole. The provision of the guide cover can guide the movement of the adjustment column through the side wall of the adjustment hole, prevent the adjustment column from being offset, ensure smooth movement of the adjustment column and the opening and closing cylinder when the opening and closing cylinder rotates circumferentially, and facilitate adjustment.

[0012] In the aforementioned closable cold water drain structure, the inner side of the opening and closing cylinder has a protruding annular ring around its axis. The side surface of the adjustment portion is adjacent to or abuts against the end surface of the ring. The end of the ring, close to the adjustment portion, has a protruding projection. The adjustment surface is located on one side of the projection and forms a circular transition with the end surface of the ring. The annular ring abuts against the outer side of the housing to prevent the opening and closing cylinder from shaking. The adjustment surface is provided on one side of the projection, so that when the adjustment portion moves to the projection, it can quickly move to close the drain hole, shortening the operation time and facilitating quick opening and closing.

[0013] Alternatively, in the aforementioned closable cold water discharge structure, the inner wall of the opening and closing cylinder has a spiral groove formed around its axis. The adjustment surface is formed as a sidewall of the spiral groove. The outer end of the adjustment portion extends into the spiral groove and abuts against the adjustment surface. The adjustment portion is driven by the sidewall of the spiral groove, requiring less adjustment force and easing rotation.

[0014] In the aforementioned closable cold water discharge structure, the opening and closing cylinder is axially fixed to the housing, and the inner sides of the opening and closing cylinder at both ends are sealed to the outer sides of the housing by sealing rings. The regulating portion is located between the two sealing rings. The sealing rings at both ends ensure a good seal, preventing the medium from leaking out of the opening and closing cylinder at the moving part of the regulating portion.

[0015] In the aforementioned closable cold water drain structure, the housing is cylindrical, with the water inlet and outlet located at opposite ends. The temperature sensing assembly includes a temperature sensing element, a cylindrical switch member sleeved outside the temperature sensing element, and an elastic member. The switch member is fixed to the temperature sensing element. The switch member moves under the elastic force of the elastic member, blocking the water inlet and outlet. Upon detecting an increase in the temperature of the medium within the housing, the temperature sensing element drives the switch member to move, blocking the water inlet and drain hole. The elastic member and temperature sensing element cooperate to detect water temperature and automatically select a water path, eliminating the need for additional operation and providing convenient use.

[0016] In the above-mentioned closable cold water discharge structure, a limit seat is provided in the shell near the water outlet, and a water outlet for water to flow through is formed between the outer side of the limit seat and the inner wall of the shell. The switch component can approach the limit seat and form a seal with the limit seat under the elastic force of the elastic component.

[0017] In the above-mentioned closable cold water discharge structure, the limit seat has a concave limit hole on the side facing the water inlet, and the temperature sensing element has a protruding rod-shaped telescopic part, and the end of the telescopic part rests against the bottom of the limit hole under the elastic force of the elastic member.

[0018] In the aforementioned closable cold water drain structure, the outer side of the temperature sensing element near the water inlet has a protruding stop shoulder. The outer side of the temperature sensing element near the water outlet is threadedly connected to a stop ring. The inner wall of the switch element has a protruding, annular shoulder that extends between the stop ring and the stop shoulder. The threaded stop ring and the stop shoulder secure the switch element, effectively preventing manufacturing errors and ensuring stable fixation of the temperature sensing element and switch element. Furthermore, it facilitates disassembly, maintenance, and replacement of different temperature sensing elements or switch elements, thus providing a wide range of applications.

[0019] Compared with the existing technology, this closable cold water discharge structure has the following advantages:

[0020] 1. This closable cold water drain mechanism automatically opens one of the waterways in the fall and winter by utilizing the temperature sensing component's autonomous movement to drain the cold water from the pipes. This eliminates the need for additional operation and is convenient to use. In the summer, the cold water drain function can be manually closed by turning the on / off cylinder. This single adjustment allows for extended use, making it even more convenient to use.

[0021] 2. Two independent water channels for water outlet and drainage are set up, so that the discharge of cold water and the output of hot water are independent of each other, avoiding getting the user wet, and the hot water output status is visible and more intuitive.

[0022] 3. When the closable cold water discharge structure is in use, the cylindrical shell can be easily connected to any position in the pipeline. It can be installed in a convenient position according to the different users or places of use. It has a wide range of applications and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic cross-sectional view of the closable cold water discharge structure.

[0024] Figure 2 This is a cross-sectional structural diagram of the closable cold water discharge structure when the cold water discharge function is closed.

[0025] Figure 3 It is a schematic cross-sectional view of the opening and closing cylinder in the closable cold water discharge structure.

[0026] In the figure, 1. Shell; 11. Water inlet; 12. Water outlet; 13. Drain hole; 14. Limit seat; 15. Water outlet; 16. Limit hole; 2. Temperature sensing component; 21. Temperature sensing element; 22. Switch component; 23. Elastic component; 24. Telescopic part; 25. Limit shoulder; 26. Boss; 3. Opening and closing cylinder; 31. Adjusting surface; 32. Limiting part; 33. Convex ring; 34. Protruding part; 4. Adjusting part; 41. Opening and closing spring; 42. Adjusting column; 5. Guide cover; 6. Limiting ring. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, the closable cold water drain structure comprises a cylindrical housing 1 having a water inlet 11 and a water outlet 12 at its two ends. A water passage connecting the water inlet 11 and the water outlet 12 is provided within the housing 1. A drain hole 13 is also formed through the side of the housing 1 and communicates with the water passage. This drain hole 13 is connected to the exterior of the housing 1 via a separate drainage channel. The outlet of the drainage channel has a water outlet for connection to a pipeline.

[0030] Inside the housing 1, a stopper 14, a temperature sensing assembly 2, and a sealing portion are arranged in sequence from the water outlet 12 toward the water inlet 11. The water passage includes a water inlet 15 formed between the outer side of the stopper 14 and the inner wall of the housing 1, through which water flows. The temperature sensing assembly 2 includes a temperature sensing element 21 having a protruding, rod-shaped telescopic portion 24, a cylindrical switch 22 coaxially arranged with the housing 1, and an elastic member 23. The stopper 14 has a second annular sealing member at one end facing the switch 22. When the switch 22 moves toward the water outlet 12 under the elastic force of the elastic member 23, the end of the switch 22 abuts against the second sealing member, forming a seal between the switch 22 and the stopper 14. At the same time, a circular seal member 1 is fixed to the outside of the end of the switch member 22 near the water outlet 12. This seal member 1 forms a seal between the outside of the switch member 22 and the inner wall of the housing 1. When the switch member 22 abuts against the seal member 2 under the elastic force of the elastic member 23, the seal between the seal members 1 and 2 blocks the water passage 15, preventing communication between the water inlet 11 and the water outlet 12. A water gap is formed between the inside of the switch member 22 and the outside of the temperature sensing element 21, through which water flows.

[0031] The side of the limit seat 14 facing the water inlet 11 has a recessed limit hole 16. The end of the telescopic portion 24 extends into the limit hole 16 and, under the elastic force of the elastic member 23, abuts the bottom of the limit hole 16. The temperature sensing element 21 is disposed within the switch member 22. The outer side of the temperature sensing element 21 near the water inlet 11 has a protruding, annular limit shoulder 25. The outer side of the temperature sensing element 21 near the water outlet 12 is threadedly connected to an annular limit ring 6. The inner wall of the switch member 22 has a protruding, annular shoulder 26. This shoulder 26 extends between the limit ring 6 and the limit shoulder 25. When the limit ring 6 is screwed in, the shoulder 26 is pressed against the limit shoulder 25, thereby securing the switch member 22 and the temperature sensing element 21. When the temperature sensing element 21 senses that the temperature of the medium in the water passage has risen to a set value, the telescopic portion 24 of the temperature sensing element 21 is pushed out. Since the limit seat 14 is fixed in the housing 1, the temperature sensing element 21 drives the switch member 22 to move toward the sealing portion until the end of the switch member 22 abuts against the sealing portion and forms a seal. Since the opening position of the drain hole 13 in the axial direction of the housing 1 is located between the sealing portion and the sealing member 1, the seal formed by the sealing member 1 and the sealing portion can block the drain hole 13. In this embodiment, the elastic member 23 is a tower spring, and its two ends respectively abut against the housing 1 and the temperature sensing element 21; the temperature sensing element 21 can be a paraffin temperature sensing package or an SMA temperature sensing package; the sealing portion includes an annular sealing seat fixed to the housing 1 and an annular sealing ring fixed to the sealing seat, and the tower spring is inserted into the sealing seat.

[0032] This closable cold water drain structure can be used in the water outlet of hand showers, overhead showers, and other showerheads in shower equipment. Specifically, it can be used as a joint structure, with the threaded connection structure at both ends of the housing 1 connected to the delivery pipe or the water inlet of the hand shower or overhead shower. The water outlet of the drainage channel can be directly connected to the floor drain or the cold water pipe through a pipe for reuse.

[0033] In cool weather, such as autumn and winter, when a shower is needed, the faucet is turned on and water first flows into the housing 1 of the closable cold water drain structure. The remaining water in the pipe is relatively low in temperature, and the temperature sensing element 21 does not extend. The switch member 22, under the elastic force of the elastic member 23, abuts against the second sealing member, thereby blocking the water inlet 11 and the water outlet 12. At the same time, the switch member 22 leaves the sealing seat, opening the drain hole 13, and the cold water is discharged through the drain hole 13 without entering the shower device.

[0034] When the hot water in the water heater enters the housing 1, the temperature sensing element 21 expands, driving the switch member 22 to move toward the water inlet 11 under the elastic force of the elastic member 23 until it abuts against the sealing portion and blocks the drain hole 13. At this time, the other end of the switch member 22 leaves the sealing member 2, the water outlet 15 is opened, and hot water can flow from the water outlet 12 into the shower device for the user to shower.

[0035] However, in the case of needing to use cold water, such as in summer, the cold water draining function needs to be turned off.

[0036] A cylindrical opening and closing cylinder 3 is also sleeved on the outside of the shell 1. The opening and closing cylinder 3 is axially fixed to the shell 1, and the inner sides of the two ends of the opening and closing cylinder 3 are sealed with the outer side of the shell 1 by a sealing ring. An opening and closing mechanism is provided between the temperature sensing component 2 and the opening and closing cylinder 3. The opening and closing mechanism can drive the temperature sensing component 2 to move axially after the opening and closing cylinder 3 rotates circumferentially and position it after blocking the drainage hole 13.

[0037] Specifically, the opening and closing mechanism includes an adjusting portion 4 provided on the temperature sensing component 2, an adjusting surface 31 located on the opening and closing cylinder 3, and a limiting portion 32 located on the opening and closing cylinder 3 or the shell 1. The adjusting portion 4 passes through an opening on the side of the shell 1. The axial width of the opening in the shell 1 is greater than the axial width of the adjusting portion 4 in the shell 1, and the adjusting portion 4 is located between the two aforementioned sealing rings. The position of the adjusting surface 31 corresponds to the position of the adjusting portion 4, and the adjusting surface 31 is tilted relative to the axis of the opening and closing cylinder 3. When the opening and closing cylinder 3 rotates circumferentially, the adjusting portion 4 can move along the adjusting surface 31 and drive the temperature sensing component 2 to move. The limiting portion 32 can limit the adjusting portion 4 when the drain hole 13 is blocked.

[0038] In this embodiment, the switch member 22 in the temperature sensing assembly 2 has a recessed adjustment hole on its outer side. The adjustment portion 4 includes an opening and closing spring 41 disposed within the adjustment hole and a columnar adjustment column 42. A guide cover 5 is fixed to the side of the housing 1 via fasteners. The guide cover 5 has an adjustment hole extending therethrough at a position corresponding to the adjustment column 42. The adjustment column 42 has a protruding annular retaining edge on the outer side of the end facing the opening and closing spring 41. Under the elastic force of the opening and closing spring 41, the adjustment column 42 partially passes through the guide cover 5 and abuts against the inner wall of the opening and closing cylinder 3. The opening and closing cylinder 3 has a protruding annular protrusion 33 on its inner side around its axis. The side of the adjustment column 42 is adjacent to or abuts against one end surface of the protrusion 33. The protrusion 33 has a protruding protrusion 34 on the end near the adjustment portion 4. Both sides of the protrusion 34 are the aforementioned adjustment surfaces 31, and the adjustment surfaces 31 and the end surfaces of the protrusion 33 form a circular arc transition. The limiting portion 32 comprises a recessed hole located inside the opening and closing cylinder 3, adjacent to the direction in which the protrusion 34 projects. When the adjustment post 42 moves along the adjustment surface 31 to the highest point of the protrusion 34, the outer end of the adjustment post 42 can extend into the recessed hole, thereby limiting the position of the adjustment post 42. To ensure easy removal of the adjustment post 42 after limiting, the recessed hole, sidewalls, and outer end of the adjustment post 42 are all designed to be arc-shaped. To ensure the stability of the axial movement of the temperature sensing component 2, there are at least two adjusting portions 4, one on each opposite side of the temperature sensing component 2.

[0039] When only cold water is used in summer, the opening and closing cylinder 3 can be rotated, and the adjusting column 42 moves along the end surface of the convex ring 33 to the adjusting surface 31, and moves to the highest point of the protrusion 34 through the inclined adjusting surface 31. Under the elastic force of the opening and closing spring 41, it extends and snaps into the concave hole to limit the adjusting column 42. During the movement of this adjusting column 42, it will drive the switch member 22 and the temperature sensing element 21 to move away from the limiting seat 14 and move toward the water inlet 11 until the end of the switch member 22 abuts against the sealing seat to block the drain hole 13. At this time, the drain hole 13 is always in a closed state. The function of this closable cold water discharge structure is equivalent to a joint, and it does not control the switching of water discharge according to the change of the medium temperature in the housing 1.

[0040] Example 2

[0041] The technical solution of this embodiment is roughly the same as that of the first embodiment, except that the opening and closing mechanism includes an adjusting portion 4 passing through the side of the shell 1 and a spiral groove located on the inner wall of the opening and closing cylinder 3 and opened around the axis of the opening and closing cylinder 3. The adjusting surface 31 is the side wall of the spiral groove. The adjusting column 42 in the adjusting portion 4 extends into the spiral groove under the elastic force of the opening and closing spring 41. The width of the spiral groove is slightly larger than the width of the outer end of the adjusting column 42. The limiting portion 32 is a concave hole opened at the bottom of the spiral groove.

[0042] The temperature sensing component 2 may include a temperature sensor, a valve core, a spring and a driving motor that can drive the valve core to move axially along the shell 1. The driving motor may be a linear motor, and its output end is not fixed to the valve core, but is in abutment with it. The driving motor cooperates with the spring to realize the back-and-forth switching of the valve core in the water channel according to the medium temperature detected by the temperature sensor. The regulating part 4 can be arranged on the valve core, and can also drive the valve core to move to close the drain hole 13 through the above-mentioned opening and closing mechanism.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A closable cold water discharge structure, comprising a housing (1) having a water inlet (11) and a water outlet (12), wherein a temperature sensing component (2) is provided in the housing (1), characterized in that: The side of the shell (1) is also provided with a drainage hole (13). The temperature sensing component (2) can detect the temperature of the medium in the shell (1) and move, and after the temperature sensing component (2) moves, one of the water outlet (12) and the drainage hole (13) can be connected to the water inlet (11). The outer side of the shell (1) is also provided with a cylindrical opening and closing cylinder (3). An opening and closing mechanism is provided between the temperature sensing component (2) and the opening and closing cylinder (3). The opening and closing mechanism can drive the temperature sensing component (2) to move and block the drainage hole (13) after the opening and closing cylinder (3) rotates circumferentially. The opening and closing mechanism includes a The invention relates to a device comprising an adjusting portion (4) on the opening and closing cylinder (3), an adjusting surface (31) on the opening and closing cylinder (3), and a limiting portion (32) on the opening and closing cylinder (3) or the shell (1), wherein the adjusting portion (4) extends from the side of the shell (1), the position of the adjusting surface (31) corresponds to the position of the adjusting portion (4), and the adjusting surface (31) is inclined relative to the axis of the opening and closing cylinder (3), and when the opening and closing cylinder (3) rotates circumferentially, the adjusting portion (4) can move along the adjusting surface (31) and drive the temperature sensing component (2) to move, and the limiting portion (32) can limit the moved adjusting portion (4) when the drain hole (13) is blocked.

2. The closable cold water discharge structure according to claim 1, characterized in that: The regulating portion (4) includes an opening and closing spring (41) and an regulating column (42). A guide cover (5) is fixed to the side of the shell (1). An regulating hole is formed on the guide cover (5) at a position corresponding to the position of the regulating column (42). The regulating column (42) partially passes through the guide cover (5) under the elastic force of the opening and closing spring (41). The limiting portion (32) includes a concave hole located on the inner side of the opening and closing cylinder (3), and the outer end of the regulating column (42) can extend into the concave hole.

3. The closable cold water discharge structure according to claim 1 or 2, characterized in that: The inner side of the opening and closing cylinder (3) is provided with a protruding annular convex ring (33) around its axis, the side surface of the regulating portion (4) is arranged adjacent to or abuts against the end surface of the convex ring (33), and the convex ring (33) has a protruding protrusion (34) at one end close to the regulating portion (4), and the regulating surface (31) is located on one side of the protrusion (34) and transitions to the end surface of the convex ring (33) in an arc shape.

4. The closable cold water discharge structure according to claim 1 or 2, characterized in that: The inner wall of the opening and closing cylinder (3) has a spiral groove concave in a spiral shape around its axis, the adjustment surface (31) is the side wall of the spiral groove, and the outer end of the adjustment portion (4) extends into the spiral groove and abuts against the adjustment surface (31).

5. The closable cold water discharge structure according to claim 1 or 2, characterized in that: The opening and closing cylinder (3) is axially fixed to the housing (1), and the inner sides of both ends of the opening and closing cylinder (3) and the outer side of the housing (1) are sealed by sealing rings, and the adjusting portion (4) is located between the two sealing rings.

6. The closable cold water discharge structure according to claim 1 or 2, characterized in that: The housing (1) is cylindrical, the water inlet (11) and the water outlet (12) are respectively located at two ends of the housing (1), the temperature sensing component (2) comprises a temperature sensing element (21), a cylindrical switch member (22) sleeved on the outside of the temperature sensing element (21), and an elastic member (23), the switch member (22) being fixed to the temperature sensing element (21), the switch member (22) being able to move under the elastic force of the elastic member (23) and causing the water inlet (11) and the water outlet (12) to be blocked, and the temperature sensing element (21) being able to drive the switch member (22) to move and block the water inlet (11) and the drain hole (13) after detecting that the temperature of the medium in the housing (1) has increased.

7. The closable cold water discharge structure according to claim 6, characterized in that: A limit seat (14) is provided in the housing (1) near the water outlet (12), and a water outlet (15) is formed between the outer side of the limit seat (14) and the inner wall of the housing (1) for water to flow through. The switch member (22) can approach the limit seat (14) under the elastic force of the elastic member (23) and form a seal with the limit seat (14).

8. The closable cold water discharge structure according to claim 7, characterized in that: The limiting seat (14) has a concave limiting hole (16) on one side facing the water inlet (11), and the temperature sensing element (21) has a protruding rod-shaped telescopic portion (24), and the end of the telescopic portion (24) abuts against the bottom of the limiting hole (16) under the elastic force of the elastic member (23).

9. The closable cold water discharge structure according to claim 6, characterized in that: The outer side of the temperature sensing element (21) near the water inlet (11) has a protruding limit shoulder (25), and the outer side of the temperature sensing element (21) near the water outlet (12) is threadedly connected to a limit ring (6). The inner wall of the switch member (22) has a protruding annular shoulder (26), and the shoulder (26) extends between the limit ring (6) and the limit shoulder (25).

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