Cold water discharge structure

Abstract

The present invention provides a cold water drain structure, belonging to the technical field of shower equipment. It solves the problem of the inconvenience of using the cold water drain function in existing control valves. The cold water drain structure includes a housing having a water inlet and a water outlet, wherein a temperature sensing component and an elastic member are disposed within the housing. The side of the housing also has a drain hole that can be connected to the water inlet. The temperature sensing component moves under the elastic force of the elastic member to block the water inlet and the water outlet and connect the water inlet and the drain hole. After sensing an increase in the temperature of the medium in the housing, the temperature sensing component can overcome the elastic force of the elastic member and move to block the water inlet and the drain hole and reconnect the water inlet to the water outlet. The 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 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, the control valve and switching valve device with the cold water discharge function require the cooperation of structures such as a piston, a sliding pipe, a handle, an eccentric pin, a deep groove, and a shallow groove. Not only is the overall structure relatively complicated, but when in use, the pre-released cold water still flows out from the original water outlet. That is, when used in a shower, the cold water is discharged from the shower head or the overhead spray, and there is still a possibility of directly wetting the user. After the cold water 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 cold water discharge structure to solve the problem that the cold water discharge function in the existing control valve is inconvenient to use.

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

[0007] The cold water discharge structure includes a shell with a water inlet and a water outlet, and a temperature sensing component and an elastic member are arranged in the shell. It is characterized in that the side of the shell also has a drainage hole that can be connected to the water inlet. The temperature sensing component moves under the elastic force of the above-mentioned elastic member to block the water inlet and the water outlet and connect the water inlet and the drainage hole. The temperature sensing component can overcome the elastic force of the elastic member and move after sensing the temperature increase of the medium in the shell to block the water inlet and the drainage hole and connect the water inlet with the water outlet again.

[0008] This cold water drain structure can be applied to the water outlet mechanisms of hand-held showers, overhead showers, and other shower equipment. When the shower equipment has not been used for a long time, the temperature of the residual water in the water supply pipe will gradually decrease. When the shower equipment is turned on again, the cold water in the water supply pipe will first enter this cold water drain structure through the water inlet. Because the temperature in the shell is low by default, the temperature sensing component remains in a low-temperature contracted state and moves under the elastic force of the elastic part, so that the water inlet and the water outlet are blocked. The water inlet is only connected to the drain hole, and the cold water entering the shell will be discharged from the drain hole. When the cold water is drained and hot water enters the shell, the temperature of the medium sensed by the temperature sensing component rises rapidly. The temperature sensing component overcomes the elastic force of the elastic part and moves, closing the drain hole and opening the water outlet. Hot water can then flow out from the water outlet and then out through the hand-held shower and overhead shower.

[0009] During this working process, with the cooperation of the temperature sensing component and the elastic part, the water path switching between the drain hole and the water outlet can be automatically realized according to the change of the water temperature flowing into the shell, without manual operation, and it is more convenient to use.

[0010] The drainage channel provided by the drainage hole on the side of the shell is independent of the water outlet and can drain water separately, separating the channels for draining cold water and hot water. In actual use, the discharged cold water will not flow out from the water outlet panel of the handheld shower or overhead shower, which can effectively avoid getting wet when turning on the shower equipment. At the same time, when the user sees water coming out of the handheld shower or overhead shower, it means that hot water has started to flow out. The result is more intuitive and convenient for users.

[0011] In the aforementioned cold water drainage structure, an annular seal 1 forms a seal between the outer side of the temperature sensing component and the inner wall of the housing. The housing also includes an annular sealing portion. The drain hole is located between the seal 1 and the sealing portion. Upon sensing a rise in the temperature of the medium within the housing, the temperature sensing component abuts against the sealing portion, blocking the water inlet from the drain hole. The drain hole is located on the side of the housing and is sealed on both sides by the seal 1 and the sealing portion. This allows the drain hole to be sufficiently large to facilitate rapid drainage, shorten drainage time, and facilitate user convenience.

[0012] In the aforementioned cold water drain structure, the housing is cylindrical, with the water inlet and outlet located at opposite ends of the housing. The drain hole is tilted relative to the axis of the housing, with the outlet end of the drain hole being closer to the water inlet than the inlet end. In actual use of this cold water drain structure, after the housing is installed, the water inlet is often located at the bottom of the housing. Tilt the drain hole toward the water inlet to facilitate the discharge of cold water and the connection of the drainage pipe.

[0013] In the aforementioned cold water discharge structure, the temperature sensing assembly includes a temperature sensing element and a cylindrical switch element that fits over the temperature sensing element. The switch element is fixed to the temperature sensing element. The sealing element is positioned between the outer side of the switch element facing the water outlet and the inner wall of the housing. The other end of the switch element, driven by the temperature sensing element, can approach and abut against the sealing portion to form a seal. The cylindrical switch element reduces obstruction to water flow within the housing, ensuring smooth water flow and a stable seal.

[0014] In the aforementioned cold water discharge structure, a stopper is provided within the housing near the water outlet. A water passage is formed between the outer side of the stopper and the inner wall of the housing, through which water can flow. Under the elastic force of the elastic member, the switch element can approach the stopper and form a seal therewith. The seal between the end of the switch element and the stopper, in conjunction with the seal between the switch element and the inner wall of the housing, seals the water passage. This also ensures a sufficiently large water passage area, ensuring a sufficient water flow rate. This allows for switching of the cold water discharge path while avoiding any impact on the actual water flow, thus facilitating user experience.

[0015] In the above-mentioned 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.

[0016] In the aforementioned cold water discharge 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 ring 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. It also facilitates disassembly, maintenance, and replacement of different temperature sensing elements or switch elements, thus providing a wide range of applications.

[0017] In the above-mentioned cold water discharge structure, the temperature sensing element includes a paraffin temperature sensing package or an SMA temperature sensing package. The temperature sensing element can be selected from different existing temperature sensing packages according to different actual use locations.

[0018] Alternatively, in the aforementioned cold water discharge structure, the temperature sensing element comprises a main body and a rod-shaped movable portion located at one end of the main body. The main body is fixed to the housing, the outer end of the movable portion abuts one end of the switch element, and the elastic member abuts the other end of the switch element. While placing the temperature sensing element outside the switch element increases the overall volume of the structure, it increases internal clearance, ensuring adequate water flow, and can be adapted to different locations.

[0019] In the above-mentioned cold water discharge structure, a water outlet seat is also fixed in the water outlet of the shell, the outer side of the water outlet seat is in contact with and sealed against the inner wall of the shell, a water outlet hole is opened through the water outlet seat, and the middle part of the side where the water outlet seat discharges water also has a protruding protrusion, and this side of the water outlet seat is also provided with a ring-shaped check diaphragm that can cover the water outlet hole, the outer edge of the check diaphragm is fixed to the water outlet seat, the inner edge of the check diaphragm is in contact with the outer side of the protrusion, and the check diaphragm can be deformed and leave the protrusion under the action of water pressure at the water outlet. A check diaphragm is provided in the water outlet of the shell to prevent backflow. When the water in the shell flows toward the water outlet, the check diaphragm will be pushed open by the water pressure and leave the protrusion, and the water can flow out from the inner hole of the annular check diaphragm; on the contrary, after the water outflow in the shell stops, the check diaphragm is reset under the action of its own elastic force and abuts against the outer side of the protrusion, the inner hole of the check diaphragm is blocked by the protrusion, and the water flow in the direction of the water outlet port cannot flow back.

[0020] In the above-mentioned cold water discharge structure, an annular drain seat is also fixed in the shell, and the drain seat includes an inner cylinder which is cylindrical and connected as a whole, and an outer cylinder which is sleeved on the outside of the inner cylinder. The outer edge of the check diaphragm is tightly pressed between the end of the outer cylinder and the water outlet seat. There is a gap between the outer side of one end of the outer cylinder away from the check diaphragm and the inner wall of the shell, and the gap is connected to the port of the shell water outlet. A drain hole is opened through the side wall of the outer cylinder to connect the inside of the outer cylinder with the above-mentioned gap. The end of the inner cylinder facing the check diaphragm is closer to the check diaphragm than the drain hole. The check diaphragm can be deformed under the action of water pressure at the water outlet to leave the protrusion and abut against the end of the inner cylinder. When water is flowing normally, the check diaphragm is deformed and moves away from the protrusion under the action of the water pressure in the shell, and at the same time abuts against the end of the inner cylinder, so that the outflowing water flows directly into the inner cylinder instead of flowing into the space between the inner cylinder and the outer cylinder; on the contrary, after the water flow stops, the check diaphragm resets, and the residual water in the water-using equipment connected to the water outlet of the shell will flow back under the action of its own gravity. Since the water outlet is blocked by the check diaphragm, the water will flow between the inner cylinder and the outer cylinder, and flow to the port of the water outlet of the shell through the drain hole, and flow out from the gap between the shell and the water-using equipment, thereby realizing the function of discharging residual water.

[0021] Compared with the existing technology, this cold water discharge structure has the following advantages:

[0022] 1. Through the cooperation of temperature sensing elements and elastic parts, the drain hole and water outlet can be automatically controlled without manual operation, which is more convenient to use.

[0023] 2. A separate drainage hole is opened on the side of the shell for drainage, so that cold water will not flow out from the water outlet to avoid getting the user wet. At the same time, after the cold water is drained, hot water will flow from the water outlet to the shower equipment, which makes it more intuitive to see whether the water is hot and more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional structural diagram of the first embodiment of the cold water discharge structure.

[0025] Figure 2 This is a schematic cross-sectional view of the switch component after movement in the first embodiment of the cold water discharge structure.

[0026] Figure 3 This is a schematic cross-sectional view of the water outlet in the third embodiment of the cold water discharge structure.

[0027] In the figure, 1. shell; 11. water inlet; 12. water outlet; 13. drain hole; 14. drain channel; 15. water channel; 2. temperature sensing element; 21. telescopic part; 22. limit shoulder; 3. switch member; 31. convex ring; 4. elastic member; 5. water outlet; 6. sealing member 1; 7. sealing member; 8. limit seat; 81. limit hole; 9. water outlet; 10. limit ring; 101. seal member 2; 20. water outlet seat; 201. water outlet hole; 202. protrusion; 30. check diaphragm; 40. drain seat; 401. inner tube; 402. outer tube; 403. drain hole; 50. gap. DETAILED DESCRIPTION

[0028] 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.

[0029] Example 1

[0030] like Figure 1As shown, the cold water drainage structure includes a cylindrical shell 1, the two ends of which are a water inlet 11 and a water outlet 12, respectively. The shell 1 has a water passage 15 connecting the water inlet 11 and the water outlet 12. A drainage hole 13 is also provided through the side of the shell 1, which is connected to the water passage 15. The drainage hole 13 is always connected to the outside of the shell 1 through a drainage channel 14 independent of the water passage 15. The outlet of the drainage channel 14 has a water outlet 5 for connecting a pipeline. In this embodiment, the drainage hole 13 is inclined relative to the axis of the shell 1, and the water outlet end of the drainage hole 13 is closer to the water inlet 11 than the water inlet end.

[0031] Inside the housing 1, arranged in sequence from the water outlet 12 toward the water inlet 11, are a limit seat 8 fixed to the housing 1, a temperature sensing element 2 having a protruding, rod-shaped telescopic portion 21, a cylindrical switch member 3 coaxially arranged with the housing 1, an elastic member 4 acting on the switch member 3, and a sealing portion 7. The water passage 15 includes a water inlet 9 formed between the outer side of the limit seat 8 and the inner wall of the housing 1, through which water can flow. The limit seat 8 has a second annular sealing member 101 at one end facing the switch member 3. When the switch member 3 moves toward the water outlet 12 under the elastic force of the elastic member 4, the end of the switch member 3 can abut against the second sealing member 101, forming a seal between the switch member 3 and the limit seat 8. At the same time, a circular seal 1 (6) is fixed to the outside of the end of the switch member 3 near the water outlet 12. This seal 1 (6) forms a seal between the outside of the switch member 3 and the inner wall of the housing 1. When the switch member 3 abuts against the seal 2 (101) under the elastic force of the elastic member 4, the seal between the seal 1 (6) and the seal 2 (101) blocks the water outlet 9 of the water passage 15, preventing communication between the water inlet 11 and the water outlet 12. A water gap is defined between the inside of the switch member 3 and the temperature sensing element 2, allowing water to flow through.

[0032] The side of the limit seat 8 facing the water inlet 11 has a recessed limit hole 81. The end of the telescopic portion 21 extends into the limit hole 81 and, under the elastic force of the elastic member 4, abuts the bottom of the limit hole 81. The temperature sensing element 2 is disposed within the switch member 3. A protruding, annular limit shoulder 22 is provided on the outer side of the temperature sensing element 2 near the water inlet 11. An annular limit ring 10 is threadedly connected to the outer side of the temperature sensing element 2 near the water outlet 12. The inner wall of the switch member 3 has a protruding, annular raised ring 31. This raised ring 31 extends between the limit ring 10 and the limit shoulder 22. When the limit ring 10 is screwed in, the raised ring 31 is pressed against the limit shoulder 22, thereby securing the switch member 3 and the temperature sensing element 2. When the temperature sensing element 2 senses that the temperature of the medium in the water passage 15 has risen to a set value, the telescopic portion 21 of the temperature sensing element 2 is pushed out. Since the limit seat 8 is fixed in the housing 1, the temperature sensing element 2 drives the switch member 3 to move toward the sealing portion 7 until the end of the switch member 3 abuts against the sealing portion 7 and forms a seal. Since the drainage hole 13 is located axially between the sealing portion 7 and the sealing element 1 6 in the housing 1, the seal formed by the sealing element 1 6 and the sealing portion 7 can block the drainage hole 13. In this embodiment, the elastic member 4 is a tower spring, with its two ends respectively abutting against the housing 1 and the temperature sensing element 2; the temperature sensing element 2 can adopt a paraffin temperature sensing package or an SMA temperature sensing package; the sealing portion 7 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 disposed in the sealing seat.

[0033] This cold water drain structure can be used in shower equipment such as hand showers and overhead showers. 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 pipeline or the water inlet of the hand shower or overhead shower. The water outlet 5 of the drainage channel 14 can be directly connected to the floor drain or the cold water pipe through a pipe for reuse.

[0034] When the shower device has not been used for a long time, the temperature of the residual water in the water supply line will gradually decrease. The temperature sensing element 2 in the housing 1 senses the temperature drop, and the telescopic portion 21 retracts. The sensing element and the switch 3 move toward the water outlet 12 under the elastic force of the elastic member 4. The end of the switch 3 abuts against the sealing member 2 101 of the limit seat 8, blocking the water outlet 9 of the water channel 15, and the water inlet 11 and the water outlet 12 cannot communicate. At this time, because the axial distance between the limit seat 8 and the sealing portion 7 is greater than the axial length of the switch 3, the other end of the switch 3 leaves the sealing portion 7, and the distance between the two makes the water inlet 11 and the drain hole 13 connected.

[0035] When the shower device is turned on again, the cold water in the water supply pipe will first enter the housing 1 through the water inlet 11 and be discharged through the drainage hole 13, the drainage channel 14 and the water outlet 5 in sequence.

[0036] When the cold water is drained out and the hot water in the water heater enters the housing 1, the medium temperature sensed by the temperature sensing element 2 rises rapidly, and the telescopic part 21 is pushed out, driving the switch member 3 to overcome the elastic force of the elastic member 4 and move toward the water inlet 11. The end of the switch member 3 abuts against the sealing part 7 to block the drainage hole 13. At the same time, the other end of the switch member 3 leaves the limit seat 8, opening the water outlet 9. The water passage 15 connects the water inlet 11 and the water outlet 12, then the drainage stops, and the hot water flows out from the water outlet 12, and then flows out through the hand-held shower and the top spray.

[0037] Although the expansion and deformation of temperature sensing element 2 takes a certain amount of time, due to the temperature difference between the water leaving the water heater and the water remaining in the water pipe, the water temperature rises rapidly when the cold water is drained, shortening the deformation time of temperature sensing element 2. In actual use, a temperature sensing element 2 with the largest change in the comfortable temperature range can be selected to further shorten this time, thereby making the time during the water path switching process negligible. For example, if water temperatures above 35°C are considered sufficient for hot water, a temperature sensing element 2 with the largest deformation around 35°C can be selected for water temperature sensing.

[0038] Example 2

[0039] This embodiment is substantially similar to the first embodiment, differing in that the temperature sensing element 2 is inverted and includes a main body and a rod-shaped movable portion at one end of the main body, securing the main body to the housing 1. The outer end of the movable portion faces toward the water inlet 11 and abuts against one end of the switch member 3. While positioning the temperature sensing element 2 outside the switch member 3 in this embodiment increases the overall structure's volume, it does increase internal clearance, ensuring adequate water flow. This design can be tailored to the specific application location.

[0040] Example 3

[0041] like Figure 3As shown, the scheme of this embodiment is substantially the same as that of the first embodiment, except that: the axial length of the water outlet 12 of the housing 1 is longer, and a water outlet seat 20 and an annular drain seat 40 are fixed inside the water outlet 12 of the housing 1. The drain seat 40 is closer to the end of the water outlet 12 of the housing 1 than the water outlet seat 20. The outer side of the water outlet seat 20 abuts against and seals against the inner wall of the housing 1. Several water outlet holes 201 are formed through the water outlet seat 20. The middle portion of the side of the water outlet seat 20 near the drain seat 40 also has a protruding protrusion 202. The outer side of the protrusion 202 is a curved surface. An annular check diaphragm 30 is also provided between the water outlet seat 20 and the drain seat 40. The check diaphragm 30 can block all the water outlet holes 201. The outer edge of the check diaphragm 30 is pressed tightly between the water outlet seat 20 and the drain seat 40, and the inner edge of the check diaphragm 30 abuts against the outer side of the protrusion 202 to form a seal. The drain seat 40 comprises an integrally connected cylindrical inner cylinder 401 and an outer cylinder 402 sleeved outside the inner cylinder 401. The outer edge of the check diaphragm 30 is tightly pressed between the end of the outer cylinder 402 and the water outlet seat 20. A gap 50 is defined between the outer side of the end of the outer cylinder 402 facing away from the check diaphragm 30 and the inner wall of the housing 1. This gap 50 connects to the outlet 12 of the housing 1. A drain hole 403 is formed through the sidewall of the outer cylinder 402, connecting the interior of the outer cylinder 402 with the gap 50. The end of the inner cylinder 401 facing the check diaphragm 30 is closer to the check diaphragm 30 than the drain hole 403. Under the action of water pressure at the outlet 201, the check diaphragm 30 can deform to move away from the protrusion 202 and rest against the end of the inner cylinder 401.

[0042] When water is flowing out normally, the check diaphragm 30 is deformed and moves away from the protrusion 202 under the action of the water pressure in the shell 1, and at the same time abuts against the end of the inner cylinder 401, so that the outflowing water flows directly into the inner cylinder 401, rather than flowing into the space between the inner cylinder 401 and the outer cylinder 402; on the contrary, after the water flow stops, the check diaphragm 30 is reset, and the residual water in the water-using equipment connected to the water outlet 12 of the shell 1 will flow back under the action of its own gravity. Since the water outlet 201 is blocked by the check diaphragm 30, the water will flow between the inner cylinder 401 and the outer cylinder 402, and flow to the port of the water outlet 12 of the shell 1 through the drain hole 403, and then flow out from the gap between the shell 1 and the water-using equipment, thereby realizing the function of discharging residual water.

[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 cold water discharge structure, comprising a housing (1) having a water inlet (11) and a water outlet (12), wherein a temperature sensing component and an elastic member (4) are provided in the housing (1), characterized in that: The side of the shell (1) further comprises a drain hole (13) which can be connected to the water inlet (11). The temperature sensing component moves under the elastic force of the elastic member (4) to block the water inlet (11) and the water outlet (12) and connect the water inlet (11) and the drain hole (13). The temperature sensing component can overcome the elastic force of the elastic member (4) and move after sensing the temperature rise of the medium in the shell (1) to block the water inlet (11) and the drain hole (13) and connect the water inlet (11) to the water outlet (12) again. The temperature sensing component comprises a temperature sensing element (2) and a cylindrical switch member (3) sleeved on the outside of the temperature sensing element (2). A limit seat (8) is provided in the housing (1) near the water outlet (12). A water outlet (9) is formed between the outside of the limit seat (8) and the inner wall of the housing (1) for water to flow through. The switch member (3) can approach the limit seat (8) under the elastic force of the elastic member (4) and form a seal with the limit seat (8). The limit seat (8) has a concave limit seat on the side facing the water inlet (11). The temperature sensing element (2) has a protruding rod-shaped telescopic portion (21), and the end of the telescopic portion (21) abuts against the bottom of the limiting hole (81) under the elastic force of the elastic member (4). The outer side of the temperature sensing element (2) near the water inlet (11) has a protruding limiting shoulder (22). The outer side of the temperature sensing element (2) near the water outlet (12) is threadedly connected to the limiting ring (10). The inner wall of the switch member (3) has a protruding ring (31) in the shape of an annulus, and the ring (31) extends into the A seal is formed between the limiting ring (10) and the limiting shoulder (22), the outer side of the temperature sensing component and the inner wall of the housing (1) by an annular sealing member (6), and the housing (1) also has an annular sealing portion (7). The switch component (3) is fixed to the temperature sensing element (2), and the sealing member (6) is arranged between the outer side of one end of the switch component (3) facing the water outlet (12) and the inner wall of the housing (1). The other end of the switch component (3) can be driven by the temperature sensing element (2) to approach and abut against the sealing portion (7) to form a seal.

2. The cold water discharge structure according to claim 1, characterized in that: The drainage hole (13) is located between the sealing member 1 (6) and the sealing portion (7). The temperature sensing component can abut against the sealing portion (7) after sensing the increase in the temperature of the medium in the housing (1), thereby blocking the water inlet (11) and the drainage hole (13).

3. The cold water discharge structure according to claim 1 or 2, characterized in that: The shell (1) is cylindrical, the water inlet (11) and the water outlet (12) are respectively located at two ends of the shell (1), the drainage hole (13) is opened at an angle relative to the axis of the shell (1), and the water outlet end of the drainage hole (13) is closer to the water inlet (11) than the water inlet end.

4. The cold water discharge structure according to claim 1, characterized in that: The temperature sensing element (2) comprises a paraffin temperature sensing package or an SMA temperature sensing package.

5. The cold water discharge structure according to claim 1 or 2, characterized in that: A water outlet seat (20) is also fixed in the water outlet (12) of the shell (1), and the outer side of the water outlet seat (20) abuts against and seals against the inner wall of the shell (1). A water outlet hole (201) is formed through the water outlet seat (20), and a protruding protrusion (202) is also provided in the middle of one side of the water outlet seat (20). An annular check diaphragm (30) capable of blocking the water outlet hole (201) is also provided on this side of the water outlet seat (20), the outer edge of the check diaphragm (30) is fixed to the water outlet seat (20), and the inner edge of the check diaphragm (30) abuts against the outer side of the protrusion (202), and the check diaphragm (30) can be deformed and leave the protrusion (202) under the action of water pressure at the water outlet hole (201).

6. The cold water discharge structure according to claim 5, characterized in that: A ring-shaped drain seat (40) is also fixed in the shell (1), and the drain seat (40) includes an inner cylinder (401) and an outer cylinder (402) sleeved on the outer side of the inner cylinder (401), the outer edge of the check diaphragm (30) is pressed between the end of the outer cylinder (402) and the water outlet seat (20), and a gap (50) is formed between the outer side of the end of the outer cylinder (402) away from the check diaphragm (30) and the inner wall of the shell (1), and the gap (50) is connected to the inner wall of the shell (1). The shell (1) has a water outlet (12) port, and a drain hole (403) is provided on the side wall of the outer cylinder (402) to connect the interior of the outer cylinder (402) and the gap (50). The end of the inner cylinder (401) facing the check diaphragm (30) is closer to the check diaphragm (30) than the drain hole (403). The check diaphragm (30) can be deformed under the action of water pressure at the water outlet (201) to leave the protrusion (202) and abut against the end of the inner cylinder (401).

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