Valve core seat assembly, valve core device, safety valve and electric water heater

Abstract

The utility model discloses a valve core seat assembly, a valve core device, a safety valve and an electric water heater, and relates to the technical field of electrical equipment. The valve core seat assembly comprises a valve core seat and a sealing ring; the valve core seat is provided with an internal leakage channel, the valve core is used to penetrate the internal leakage channel, and one side of the valve core seat is provided with an annular mounting portion; the sealing ring is sleeved on the annular mounting portion, and the sealing surface of the sealing ring is flush with the end surface of the annular mounting portion. The technical solution of the utility model can reduce the noise of the safety valve during the internal leakage process.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a valve core seat component, a valve core device, a safety valve and an electric water heater. Background Art

[0002] During the use of electric water heaters, the inner tank will be subjected to different pressures at different stages and under different conditions. In order to prevent fatigue damage or destruction of the inner tank due to long-term high pressure and ensure normal and safe use by users, a safety valve is usually installed at the water inlet pipe of the electric water heater. The safety valve has a rated external leakage pressure value. During use, the pressure in the inner tank continues to rise. When the pressure in the inner tank rises to the rated external leakage pressure value, the one-way safety valve leakage port opens, and the pressure is released by discharging part of the hot water in the inner tank of the water heater, thereby effectively reducing the pressure in the inner tank and protecting the inner tank.

[0003] In the related art, due to the changes in the inner tank pressure and the frequent fluctuations in the water inlet pressure, the safety valve will frequently start and stop the internal leakage function, and will generate noise when the internal leakage is frequently opened. Utility Model Content

[0004] The main purpose of the utility model is to provide a valve core seat assembly, a valve core device, a safety valve and an electric water heater, aiming at reducing the noise of the safety valve during the internal leakage process.

[0005] In order to achieve the above-mentioned purpose, a valve core seat assembly proposed by the utility model comprises:

[0006] A valve core seat is provided with an internal leakage channel, the valve core is used to penetrate the internal leakage channel, and an annular mounting portion is provided on one side of the valve core seat;

[0007] The sealing ring is sleeved on the annular mounting portion, and the sealing surface of the sealing ring is flush with the end surface of the annular mounting portion.

[0008] In one embodiment of the present application, the sealing ring is interference fit with the annular mounting portion.

[0009] In one embodiment of the present application, the inner side wall of the annular mounting portion is provided with a notch communicating with the internal leakage channel.

[0010] In an embodiment of the present application, the notch is arranged to extend radially along the annular mounting portion.

[0011] In one embodiment of the present application, the notch penetrates from the inner side wall to the outer side wall of the annular mounting portion.

[0012] In one embodiment of the present application, the notch also penetrates to a side of the annular mounting portion away from the valve core seat body.

[0013] In one embodiment of the present application, at least two notches are provided, and at least two notches are distributed at intervals along the circumference of the annular mounting portion.

[0014] To achieve the above objectives, the present application also provides a valve core device, including the above valve core seat assembly.

[0015] In one embodiment of the present application, the valve core device further includes:

[0016] A fixed seat, the valve core seat assembly is located on one side of the fixed seat;

[0017] The valve core comprises a valve core rod and a valve core bowl seat arranged at one axial end of the valve core rod, the valve core rod penetrates the internal leakage channel of the valve core seat and the fixed seat, and the valve core bowl seat abuts against the sealing ring to close the internal leakage channel;

[0018] A clamping elastic member, sleeved on the valve core rod, one end of the clamping elastic member abuts against the valve core seat, and the other end abuts against the fixed seat, and the clamping elastic member applies a force in a first direction to the valve core seat and the valve core;

[0019] An inner leakage elastic member is sleeved on the valve core rod, one end of the inner leakage elastic member abuts against the valve core seat, and the other end abuts against the outer side wall of the valve core rod, and the inner leakage elastic member applies a force opposite to the first direction to the valve core.

[0020] To achieve the above objectives, the present application also provides a safety valve, comprising:

[0021] The valve body is provided with a liquid inlet cavity, a liquid outlet cavity and an external leakage cavity, wherein the liquid inlet cavity is communicated with the liquid outlet cavity, and the liquid outlet cavity is communicated with the external leakage cavity;

[0022] The valve core device is arranged in the liquid outlet cavity and is used to reduce the pressure of the liquid flowing from the liquid inlet cavity into the liquid outlet cavity;

[0023] The leakage device is arranged in the leakage cavity and is used for allowing the liquid in the liquid outlet cavity with a pressure higher than a set pressure to flow into the leakage cavity.

[0024] To achieve the above objectives, the present application also provides an electric water heater, comprising an inner tank, a water inlet pipe connected to the inner tank, and a safety valve installed at the water inlet end of the water inlet pipe, wherein the safety valve is the above-mentioned safety valve, and the water inlet pipe is connected to the liquid inlet of the safety valve.

[0025] The technical solution of the utility model makes the sealing surface of the sealing ring flush with the end face of the annular mounting portion, which is equivalent to shortening the length of the annular mounting portion. When the valve core seat assembly is applied to the safety valve, the distance between the annular mounting portion and the valve core bowl seat can be increased, thereby eliminating the internal leakage seal between the valve core seat and the valve core bowl seat, and only the sealing ring and the valve core bowl seat are used to form the internal leakage seal. When the internal leakage opening condition is reached, it is only necessary to open the internal leakage seal formed between the sealing ring and the valve core bowl seat, which can reduce the number of sudden changes of the water flow from a large cross-section to a small cross-section. At the same time, the shortening of the length of the annular mounting portion can increase the internal leakage channel and reduce the cross-sectional difference of the water flow from a large cross-section to a small cross-section, thereby reducing the noise of the safety valve during the internal leakage process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 A cross-sectional view of a valve core seat assembly in one embodiment of the utility model when it cooperates with the valve core;

[0028] Figure 2 This is a structural schematic diagram of a valve core seat in an embodiment of a valve core seat assembly of the utility model;

[0029] Figure 3 A bottom view of a valve core seat in an embodiment of a valve core seat assembly of the utility model;

[0030] Figure 4 This is a structural schematic diagram of an embodiment of the safety valve of the utility model;

[0031] Figure 5 A bottom view of an embodiment of a safety valve of the utility model;

[0032] Figure 6 for Figure 5 Sectional view at AA in the middle;

[0033] Figure 7 This is a partial structural schematic diagram of a safety valve in an embodiment of the utility model without the valve core.

[0034] Description of Figure Numbers:

[0035]

[0036]

[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0042] During the use of electric water heaters, the inner tank will be subjected to different pressures at different stages and under different conditions. In order to prevent fatigue damage or destruction of the inner tank due to long-term high pressure and ensure normal and safe use by users, a safety valve is usually installed at the water inlet pipe of the electric water heater. The safety valve has a rated external leakage pressure value. During use, the pressure in the inner tank continues to rise. When the pressure in the inner tank rises to the rated external leakage pressure value, the one-way safety valve leakage port opens, and the pressure is released by discharging part of the hot water in the inner tank of the water heater, thereby effectively reducing the pressure in the inner tank and protecting the inner tank.

[0043] In the related art, due to the changes in the inner tank pressure and the frequent fluctuations in the water inlet pressure, the safety valve will frequently start and stop the internal leakage function, and will generate noise when the internal leakage is frequently opened.

[0044] It should be noted that since the sealing ring is sleeved on the annular mounting portion of the valve core seat, in order to improve the installation reliability of the sealing ring, the bottom of the annular mounting portion is usually extended to form a step through the extended section of the bottom of the annular mounting portion to limit and fix the sealing ring, so that a second seal or a narrow gap exists between the valve core seat and the valve core bowl seat.

[0045] During the use of the electric water heater, when the internal leakage opening condition is not met, the internal leakage sealing ring contacts the valve core bowl seat of the valve core to form the first seal. At the same time, because the internal leakage sealing ring is made of silicone material, when the internal leakage sealing ring forms a seal with the valve core bowl seat, the sealing ring will produce a certain degree of deformation, and there will be a second seal or a narrow gap between the valve core seat and the valve core bowl seat. When the internal leakage opening condition is met, the internal leakage channel first restores the deformation of the sealing ring to open the second seal between the valve core seat and the valve core bowl seat, and then opens the second seal between the sealing ring and the valve core bowl seat as the difference between the inner tank pressure and the water inlet pressure increases, thereby achieving internal leakage. Then, in the process of fully opening the internal leakage channel, there will be multiple transitions from a large water flow section to a small water flow section, and multiple jet noises will occur during this process, so noise will frequently be generated when the internal leakage is frequently opened.

[0046] Based on this, see Figure 1 The utility model proposes a valve core seat assembly 1 including a valve core seat 21 and a sealing ring 23; the valve core seat 21 is provided with an internal leakage channel 21a, the valve core 24 is used to penetrate the internal leakage channel 21a, and an annular mounting portion 211 is provided on one side of the valve core seat 21; the sealing ring 23 is sleeved on the annular mounting portion 211, and the sealing surface of the sealing ring 23 is flush with the end surface of the annular mounting portion 211.

[0047] When the valve core seat assembly 1 is applied to the safety valve 100, the valve core rod 241 of the valve core 24 is inserted into the internal leakage channel 21a. When the internal leakage opening condition is not met, the valve core bowl seat 242 of the valve core 24 abuts against the sealing ring 23 to form an internal leakage seal; when the internal leakage opening condition is met, the internal leakage channel 21a first restores the deformation of the sealing ring 23 to slowly open the sealing surface between the sealing ring 23 and the valve core bowl seat 242, and starts internal leakage. Since the sealing surface of the sealing ring 23 is flush with the end face of the annular mounting portion 211, the distance between the annular mounting portion 211 and the valve core bowl seat 242 can be increased, thereby canceling the internal leakage seal between the valve core seat 21 and the valve core bowl seat 242, and reducing the sudden change of the water flow from a large cross-section to a small cross-section here.

[0048] Therefore, the technical solution of the utility model makes the sealing surface of the sealing ring 23 flush with the end surface of the annular mounting portion 211, which is equivalent to shortening the length of the annular mounting portion 211. When the valve core seat assembly 1 is applied to the safety valve 100, the distance between the annular mounting portion 211 and the valve core bowl seat 242 can be increased, thereby canceling the internal leakage seal between the valve core seat 21 and the valve core bowl seat 242, and only the sealing ring 23 and the valve core bowl seat 242 are used to form the internal leakage seal. When the internal leakage opening condition is reached, it is only necessary to open the internal leakage seal formed between the sealing ring 23 and the valve core bowl seat 242, which can reduce the number of sudden changes of the water flow from a large cross-section to a small cross-section. At the same time, the shortening of the length of the annular mounting portion 211 can increase the internal leakage channel 21a, and can reduce the cross-sectional difference of the water flow from a large cross-section to a small cross-section, thereby reducing the noise of the safety valve 100 during the internal leakage process and reducing the howling during the use of the electric water heater.

[0049] In one embodiment of the present application, please refer to Figure 1 The sealing ring 23 and the annular mounting portion 211 are interference fit.

[0050] It can be understood that by making the sealing ring 23 and the annular mounting portion 211 have an interference fit, the installation reliability of the sealing ring 23 can be effectively guaranteed on the basis of shortening the length of the annular mounting portion 211 .

[0051] In one embodiment of the present application, please refer to Figure 2 , Figure 3 The inner side wall of the annular mounting portion 211 is provided with a notch 2111 communicating with the inner leakage channel 21a.

[0052] It can be understood that when the valve core seat 21 is applied to the safety valve 100, the annular mounting portion 211 is sleeved with a sealing ring 23, and the valve core rod 241 of the valve core 24 is inserted into the internal leakage channel 21a. When the internal leakage opening condition is not met, the valve core bowl seat 242 of the valve core 24 abuts against the sealing ring 23 to form an internal leakage seal; when the internal leakage opening condition is met, the internal leakage channel 21a first restores the deformation of the sealing ring 23 to slowly open the sealing surface between the sealing ring 23 and the valve core bowl seat 242, and starts internal leakage. The inner wall is provided with a notch 2111 connected to the internal leakage channel 21a, and the internal leakage channel 21a of the valve core seat 21 can also be enlarged by the notch 2111, so that the cross-sectional difference of the water flow from the liquid outlet chamber 10b of the safety valve 100 to the internal leakage channel 21a can be further reduced, that is, the cross-sectional difference of the water flow from the large cross-section to the small cross-section can be further reduced, thereby reducing the noise of the safety valve 100 during the internal leakage process, thereby reducing the howling of the electric water heater during use, and at the same time, the rapid opening of the sealing surface in a short time can be achieved.

[0053] In one embodiment of the present application, please refer to Figure 2 , Figure 3The notch 2111 is arranged along the radial extension of the annular mounting portion 211. It can be understood that the radially extending notch 2111 can ensure the strength of the annular mounting portion 211 itself, and can also better reduce the cross-sectional difference of the water flow from the large cross section to the small cross section, so as to effectively reduce the noise of the safety valve 100 during the internal leakage process.

[0054] In practical applications, the notch 2111 may only penetrate the groove body on the inner side wall of the annular mounting portion 211 , or the notch 2111 may not only penetrate the inner side wall of the annular mounting portion 211 , but also penetrate other side walls of the annular mounting portion 211 .

[0055] In one embodiment of the present application, please refer to Figure 2 , Figure 3 The notch 2111 extends from the inner wall of the annular mounting portion 211 to the outer wall. It can be understood that the notch 2111 extending from the inner wall of the annular mounting portion 211 to the outer wall can further increase the internal leakage channel 21a of the valve core seat 21, thereby further reducing the cross-sectional difference of the water flow from the liquid outlet cavity 10b of the safety valve 100 to the internal leakage channel 21a, so that the safety valve 100 has a better noise reduction effect during the internal leakage process.

[0056] In practical applications, the width of the notch 2111 at each position may be the same or different.

[0057] In one embodiment of the present application, please refer to Figure 2 , Figure 3 The notch 2111 also penetrates to the side of the annular mounting portion 211 away from the valve core seat 21 body, that is, the notch 2111 is a through hole with openings on three sides.

[0058] It can be understood that the notch 2111 with openings on three sides can further enlarge the internal leakage channel 21a of the valve core seat 21, thereby further reducing the cross-sectional difference of the water flow from the liquid outlet chamber 10b of the safety valve 100 to the internal leakage channel 21a, so that the safety valve 100 has a better noise reduction effect during the internal leakage process.

[0059] In one embodiment of the present application, please refer to Figure 2 , Figure 3 There are at least two notches 2111 , and the at least two notches 2111 are distributed at intervals along the circumference of the annular mounting portion 211 .

[0060] It can be understood that by distributing at least two notches 2111 at circumferential intervals on the annular mounting portion 211, the internal leakage channel 21a of the valve core seat 21 can be further enlarged by at least two notches 2111, thereby further reducing the cross-sectional difference of the water flow from the liquid outlet chamber 10b of the safety valve 100 to the internal leakage channel 21a, so that the noise reduction effect of the safety valve 100 during the internal leakage process is better.

[0061] In practical applications, the shapes and sizes of the at least two notches 2111 may be the same or different.

[0062] Furthermore, at least two notches 2111 are distributed in a circumferential annular array along the annular mounting portion 211 .

[0063] In this embodiment, when there are two notches 2111, the angle between the two notches 2111 is 180°; when there are three notches 2111, the angle between two adjacent notches 2111 is 120°, and so on.

[0064] It can be understood that at least two notches 2111 distributed in the annular array can be evenly distributed on the circumference of the annular mounting portion 211. In this way, while ensuring the strength of the annular mounting portion 211 itself, the water flow can be quickly and evenly diffused in the internal leakage channel 21a during the internal leakage process, and the sealing surface between the sealing ring 23 of the safety valve 100 and the valve core bowl seat 242 can be quickly opened in a short time.

[0065] In one embodiment of the present application, please refer to Figure 2 , Figure 3 , the width of the notch 2111 is 1mm to 1.5mm. It is understandable that when the width of the notch 2111 is too small, the internal leakage channel 21a cannot be effectively enlarged by the notch 2111, thereby affecting the noise reduction effect during the internal leakage process; when the width of the notch 2111 is too large, the strength of the annular mounting portion 211 itself will be insufficient, thereby affecting the installation reliability of the sealing ring 23; therefore, by controlling the width of the notch 2111 to 1mm to 1.5mm, a better noise reduction effect can be achieved during the internal leakage process while ensuring the strength of the annular mounting portion 211 itself.

[0066] As some exemplary examples, the width of the notch 2111 can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, etc.

[0067] In one embodiment of the present application, please refer to Figure 2 , Figure 3 The inner wall of the internal leakage channel 21 a is provided with a plurality of supporting protrusions 2112 , and the plurality of supporting protrusions 2112 are distributed at intervals along the circumference of the annular mounting portion 211 , and the inner sidewall of the supporting protrusion 2112 is used to abut against the valve core 24 .

[0068] In this embodiment, the inner side surface of the supporting protrusion 2112 is a concave arc surface matching the outer side surface of the valve core 24 .

[0069] It can be understood that the provision of multiple support protrusions 2112 can effectively support the valve core 24 to ensure the installation stability of the valve core 24, and the provision of the support protrusions 2112 can also play a guiding role. When the valve core 24 moves during the internal leakage process, the valve core 24 can move along the inner side surface of the support protrusions 2112, so that the valve core 24 can move more smoothly.

[0070] In actual application, the shapes and sizes of the multiple supporting protrusions 2112 can be the same or different.

[0071] In one embodiment of the present application, please refer to Figure 2 , Figure 3 The notch 2111 is located between two adjacent supporting protrusions 2112. In this way, not only can the notch 2111 be smoothly connected to the internal leakage channel 21a, but also the notch 2111 will not affect the supporting effect of the supporting protrusion 2112 on the valve core 24.

[0072] In practical applications, the notch 2111 may be provided between any two adjacent supporting protrusions 2112 , or the notch 2111 may be provided only between two adjacent supporting protrusions 2112 .

[0073] See also Figures 4 to 7 The utility model also proposes a valve core device 20, which includes a valve core seat assembly 1. The specific structure of the valve core seat assembly 1 refers to the above embodiment. Since the valve core device 20 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0074] In one embodiment of the present application, please refer to Figure 6 The valve core device 20 also includes a fixed seat 22, a valve core 24, a clamping elastic member 25 and an internal leakage elastic member 26; the valve core seat assembly 1 is located on one side of the fixed seat 22; the valve core 24 includes a valve core rod 241 and a valve core bowl seat 242 arranged at one axial end of the valve core rod 241, the valve core rod 241 penetrates the internal leakage channel 21a of the valve core seat 21 and the fixed seat 22, and the valve core bowl seat 242 abuts against the sealing ring 23 to close the internal leakage channel 21a; the clamping elastic member 2 5 is sleeved on the valve core rod 241, one end of the clamping elastic member 25 abuts against the valve core seat 21, and the other end abuts against the fixed seat 22, and the clamping elastic member 25 applies a force in a first direction to the valve core seat 21 and the valve core 24; the internal leakage elastic member 26 is sleeved on the valve core rod 241, one end of the internal leakage elastic member 26 abuts against the valve core seat 21, and the other end abuts against the outer side wall of the valve core rod 241, and the internal leakage elastic member 26 applies a force opposite to the first direction to the valve core 24.

[0075] In this embodiment, the valve core seat 21 is provided with a first mounting hole extending along its axial direction, and the fixed seat 22 is provided with a second mounting hole extending along its axial direction. The valve core rod 241 passes through the sealing ring 23 and the first mounting hole of the valve core seat 21 in sequence. The internal leakage elastic member 26 is sleeved on the circumferential surface of the valve core rod 241, one end of which is clamped in the clamping groove on the circumferential surface of the valve core rod 241, and the other end abuts against the side surface of the valve core seat 21, so that the internal leakage elastic member 26 can apply a force to the valve core seat 21 in the opposite direction to the first direction (away from the liquid inlet chamber 10a), so that the valve core 24 can move relative to the valve core seat 21 in the opposite direction to the first direction (away from the liquid inlet chamber 10a) to the position where the valve core bowl seat 242 abuts against the sealing ring 23; thereafter, the valve core rod 241 passes through the clamping elastic member 25 and the second mounting hole of the fixed seat 22 in sequence.

[0076] See also Figures 4 to 7 The utility model also proposes a safety valve 100, which includes a valve body 10, a valve core device 20 and a leakage device. The specific structure of the valve core device 20 refers to the above embodiment. Since the electric water heater adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the valve body 10 is provided with a liquid inlet chamber 10a, a liquid outlet chamber 10b and a leakage chamber 10c. The liquid inlet chamber 10a is connected with the liquid outlet chamber 10b, and the liquid outlet chamber 10b is connected with the leakage chamber 10c; the valve core device 20 is arranged in the liquid outlet chamber 10b, and is used to reduce the pressure of the liquid flowing from the liquid inlet chamber 10a into the liquid outlet chamber 10b; the leakage device is arranged in the leakage chamber 10c, and is used to supply the liquid in the liquid outlet chamber 10b that is higher than the set pressure to flow into the leakage chamber 10c.

[0077] In this embodiment, the liquid inlet chamber 10a and the liquid outlet chamber 10b are arranged sequentially in the Y direction (the direction in which water flows in the valve body 10 when the water inlet pipe delivers water into the electric water heater), and the leakage chamber 10c is located on one side of the liquid outlet chamber 10b along the X direction (a direction perpendicular to the Y direction), and is connected to the liquid outlet chamber 10b through the leakage port 10d.

[0078] The safety valve 100 is connected to the external water inlet pipe through the liquid inlet, and the water pressure at the liquid inlet of the valve body 10 is substantially equal to the water pressure in the water inlet pipe; the safety valve 100 is connected to the connecting pipe of the water heater through the liquid outlet, and the water pressure in the liquid outlet cavity 10b of the valve body 10 is substantially equal to the water pressure in the inner tank of the water heater; the leakage cavity 10c is connected to the outside of the safety valve 100 through the leakage outlet, and the pressure in the leakage cavity 10c is substantially the same as the atmospheric pressure.

[0079] After the valve core device 20 is installed in the liquid outlet chamber 10b, it can be fixedly connected by the external thread on the circumferential outer surface of the fixing seat 22 and the internal thread on the inner wall of the liquid outlet chamber 10b. One end of the clamping elastic member 25 abuts against the valve core seat 21, and the other end abuts against the fixing seat 22, so that the clamping elastic member 25 can apply a force in a first direction (towards the liquid inlet chamber 10a) to the valve core seat 21, so that the sealing ring 23 installed on the valve core seat 21 abuts against the inner wall of the liquid outlet chamber to close the connecting port 10e between the liquid inlet chamber 10a and the liquid outlet chamber 10b.

[0080] When the water pressure in the liquid inlet chamber 10a is less than the water pressure in the liquid outlet chamber 10b, or when the water pressure in the liquid inlet chamber 10a is greater than the water pressure in the liquid outlet chamber 10b, but the combined force of the force exerted by the water in the liquid outlet chamber 10b on the valve core 24 and the valve core seat 21, and the force exerted by the clamping elastic member 25 on the valve core seat 21, is less than the combined force of the force exerted by the water pressure in the liquid inlet chamber 10a on the valve core bowl seat 242 and the sealing ring 23, the sealing ring 23 maintains contact with the inner wall of the liquid outlet chamber 10b under the action of the water pressure in the liquid outlet chamber 10b and the clamping elastic member 25 to close the connecting port 10e between the liquid inlet chamber 10a and the liquid outlet chamber 10b. At this time, the water in the liquid inlet chamber 10a cannot flow into the liquid outlet chamber 10b, that is, the water in the liquid inlet pipe cannot flow into the inner tank of the water heater.

[0081] When the water pressure in the liquid inlet chamber 10a is greater than the water pressure in the liquid outlet chamber 10b, and the combined force of the force exerted by the water in the liquid outlet chamber 10b on the valve core 24 and the valve core seat 21, and the force exerted by the clamping elastic member 25 on the valve core seat 21, is greater than the combined force of the force exerted by the water in the liquid inlet chamber 10a on the valve core bowl seat 242 and the sealing ring 23, the sealing ring 23 moves relative to the valve body 10 away from the liquid inlet chamber 10a under the action of the water pressure in the liquid inlet chamber 10a to open the connecting port 10e between the liquid inlet chamber 10a and the liquid outlet chamber 10b, so that the water in the liquid inlet chamber 10a can flow into the liquid outlet chamber 10b. During this process, the sealing ring 23 and the valve core 24, under the elastic force of the clamping elastic member 25, will reduce the pressure of the water flowing through the gap between the connecting port 10e and the sealing ring 23, so that after the water flows out of the liquid chamber 10b from the flow channel in the liquid inlet chamber 10a, the water pressure will be reduced by a certain value. The size of this value is determined by the size of the elastic force applied by the clamping elastic member 25 to the valve core seat 21. The greater the elastic force applied by the clamping elastic member 25 to the valve core seat 21, the greater the value of the water pressure reduction in the process of the water in the liquid inlet chamber 10a flowing to the liquid outlet chamber 10b, and vice versa.

[0082] Exemplarily, both the compression elastic member 25 and the internal leakage elastic member 26 may be springs.

[0083] As some examples, the liquid outlet cavity 10b is connected to the leakage cavity 10c through the leakage port 10d. The leakage device may include a sealing member 31, a mounting seat 32, a leakage valve core seat 33, a leakage elastic member 34 and a leakage valve core 35; the mounting seat 32 is connected to the inner wall of the leakage cavity 10c; the leakage valve core seat 33 is arranged close to the leakage port 10d, and the sealing member 31 is arranged on one side of the leakage valve core seat 33 close to the leakage port 10d; the leakage elastic member 34 is arranged between the leakage valve core seat 33 and the mounting seat 32; the leakage valve core seat 33 penetrates the leakage valve core seat 33, the leakage elastic member 34 and the mounting seat 32. The leakage elastic member 34 can apply a force toward the liquid outlet cavity 10b to the leakage valve core seat 33, the leakage valve core 35 and the sealing member 31, so that the sealing member 31 abuts against the end face of the valve body 10 provided with the leakage port 10d under the force of the leakage elastic member 34 to close the leakage port 10d.

[0084] In this embodiment, the surface of the valve body 10 is provided with a mounting port communicating with the leakage chamber 10c, so that the leakage device can be smoothly installed in the leakage chamber 10c. The mounting seat 32 is used to support other components of the leakage device, and the mounting seat 32 can be fixedly connected to the inner wall of the leakage chamber 10c by means of threads, buckles, bonding, etc.

[0085] It should be noted that when the water pressure in the liquid outlet chamber 10b of the valve body 10 exceeds the water pressure in the inner tank and reaches the set protection pressure, but due to the high water pressure in the liquid inlet pipe, the water in the inner tank cannot flow into the liquid inlet chamber 10a through internal leakage to reduce the water pressure in the inner tank, the water in the liquid outlet chamber 10b can push the sealing member 31 of the external leakage device to move in a direction away from the liquid outlet chamber 10b to open the external leakage port 10d, so that the water in the liquid outlet chamber 10b flows into the external leakage chamber 10c through the external leakage port 10d, and flows to the outside of the valve body 10 through the external leakage port to reduce the water pressure in the inner tank.

[0086] As some exemplary embodiments, the leakage device also includes a leakage handle 36, which is hinged to one end of the leakage valve core 35 away from the liquid outlet chamber 10b. The leakage handle 36 can be rotated to pull the leakage valve core 35, the leakage valve core seat 33 and the sealing member 31 to move in a direction away from the liquid outlet chamber 10b to open the leakage port 10d, so that the water in the liquid outlet chamber 10b flows into the leakage chamber 10c through the leakage port 10d, and flows to the outside of the valve body 10 through the leakage port to reduce the water pressure in the inner tank.

[0087] Exemplarily, the leakage elastic member 34 may be a spring.

[0088] Optionally, a groove is provided on one side of the leakage valve core seat 33 close to the leakage port 10d, and the seal 31 is arranged in the groove, so that the installation reliability of the seal 31 can be improved, thereby improving the sealing effect between the valve body 10 and the seal 31.

[0089] In practical applications, the sealing member 31 can be installed in the groove of the leakage valve core seat 33 by means of interference fit, or can be fixed in the groove of the leakage valve core seat 33 by means of bonding or the like.

[0090] The utility model also provides an electric water heater, which includes an inner tank, a water inlet pipe connected to the inner tank, and a safety valve 100 installed at the water inlet end of the water inlet pipe. The specific structure of the safety valve 100 refers to the above embodiment. Since the electric water heater adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the water inlet pipe is connected to the liquid inlet of the safety valve 100.

[0091] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A valve core seat assembly, characterized in that: include: A valve core seat is provided with an internal leakage channel, the valve core is used to penetrate the internal leakage channel, and an annular mounting portion is provided on one side of the valve core seat; The sealing ring is sleeved on the annular mounting portion, and the sealing surface of the sealing ring is flush with the end surface of the annular mounting portion.

2. The valve core seat assembly according to claim 1, characterized in that: The sealing ring is interference fit with the annular mounting portion.

3. The valve core seat assembly according to claim 1, characterized in that: The inner side wall of the annular mounting portion is provided with a notch communicating with the inner leakage channel.

4. The valve core seat assembly according to claim 3, characterized in that: The notch is arranged to extend radially along the annular mounting portion.

5. The valve core seat assembly according to claim 4, characterized in that: The notch penetrates from the inner side wall to the outer side wall of the annular mounting portion.

6. The valve core seat assembly according to claim 5, characterized in that: The notch also penetrates to a side of the annular mounting portion away from the valve core seat body.

7. The valve core seat assembly according to any one of claims 3 to 6, characterized in that: There are at least two notches, and the at least two notches are distributed at intervals along the circumference of the annular mounting portion.

8. A valve core device, characterized in that: The invention comprises a valve core seat assembly as claimed in any one of claims 1 to 7.

9. The valve core device according to claim 8, characterized in that: The valve core device also includes: A fixed seat, the valve core seat assembly is located on one side of the fixed seat; The valve core comprises a valve core rod and a valve core bowl seat arranged at one axial end of the valve core rod, the valve core rod penetrates the internal leakage channel of the valve core seat and the fixed seat, and the valve core bowl seat abuts against the sealing ring to close the internal leakage channel; A clamping elastic member, sleeved on the valve core rod, one end of the clamping elastic member abuts against the valve core seat, and the other end abuts against the fixed seat, and the clamping elastic member applies a force in a first direction to the valve core seat and the valve core; An inner leakage elastic member is sleeved on the valve core rod, one end of the inner leakage elastic member abuts against the valve core seat, and the other end abuts against the outer side wall of the valve core rod, and the inner leakage elastic member applies a force opposite to the first direction to the valve core.

10. A safety valve, characterized in that: include: The valve body is provided with a liquid inlet cavity, a liquid outlet cavity and an external leakage cavity, wherein the liquid inlet cavity is communicated with the liquid outlet cavity, and the liquid outlet cavity is communicated with the external leakage cavity; The valve core device according to any one of claims 8 to 9, arranged in the liquid outlet cavity, for decompressing the liquid flowing from the liquid inlet cavity into the liquid outlet cavity; The leakage device is arranged in the leakage cavity and is used for allowing the liquid in the liquid outlet cavity with a pressure higher than a set pressure to flow into the leakage cavity.

11. An electric water heater, comprising an inner tank, a water inlet pipe connected to the inner tank, and a safety valve installed at the water inlet end of the water inlet pipe, characterized in that: The safety valve is the safety valve according to claim 10, and the water inlet pipe is connected to the liquid inlet of the safety valve.

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