CN216344034U - Water inlet joint and water heater - Google Patents

Abstract

The utility model belongs to the technical field of water heaters, and particularly relates to a water inlet connector and a water heater. The utility model aims to solve the problem that the existing water heater is easy to block. The water inlet joint of the water heater comprises a joint body and a valve core, wherein the joint body comprises a water passing pipe section and a mounting pipe section arranged on the side wall of the water passing pipe section, and the mounting pipe section divides the water passing pipe section into a water inlet pipe section and a water outlet pipe section which are opposite to each other, so that the resistance of water is reduced; case seal installation is in the installation pipeline section, the bottom of case is provided with first installation passageway, the lateral wall of first installation passageway is provided with relative water inlet and delivery port, first filter screen is installed to the water inlet, the second filter screen is installed to the delivery port, the mesh number of first filter screen is less than or equal to the mesh number of second filter screen, so the water through the case filters twice through first filter screen and second filter screen, improve the filter effect, avoid the valve isotructure jam of water heater, the life of extension water heater.

Description

Water inlet joint and water heater

Technical Field

The utility model belongs to the technical field of water heaters, and particularly relates to a water inlet connector and a water heater.

Background

The water heater is a device which can increase the temperature of cold water to hot water within a certain time, and is a common household appliance.

The water inlet of most water heaters is directly connected with a tap water pipe, and the hot water and the cold water are mixed after being heated and then flow out from the water outlet of the water mixing valve. The long-time accumulation of large particle impurities such as silt in tap water not only easily leads to the structure such as valve of water heater to block up, still can influence the life of water heater.

Accordingly, there is a need in the art for a new water inlet joint having a filtering function to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, namely to solve the problem that the water inlet of the existing water heater is directly connected with a tap water pipe, a valve and other structures are easy to block, the utility model provides a water inlet joint and a water heater.

The water inlet joint comprises: a connector body and a valve core; the joint body comprises a water passing pipe section and a mounting pipe section arranged on the side wall of the water passing pipe section, and the mounting pipe section divides the water passing pipe section into a water inlet pipe section and a water outlet pipe section which are opposite; the bottom end of the valve core is fixed in the installation pipe section in a sealing mode, a first installation channel is arranged at the bottom end of the valve core, a water inlet and a water outlet which are opposite to each other are formed in the side wall of the first installation channel, the water inlet is opposite to the water inlet pipe section, and the water outlet is opposite to the water outlet pipe section; the water inlet is provided with a first filter screen, the water outlet is provided with a second filter screen, and the mesh number of the first filter screen is smaller than or equal to that of the second filter screen.

In an optional technical scheme of the water inlet joint, the mesh number of the first filter screen is 30-50 meshes, or the mesh number of the first filter screen is 40 meshes; the mesh number of the second filter screen is 50-70 meshes, or the mesh number of the second filter screen is 50 meshes.

In an optional technical solution of the above water inlet joint, the water inlet joint further includes a cylindrical filter screen, the cylindrical filter screen includes a first filter portion and a second filter portion, the first filter portion forms the first filter screen, and the second filter portion forms the second filter screen.

In an optional technical scheme of the water inlet joint, the first filter screen and the second filter screen are respectively in a semi-circular arc shape.

In an optional technical scheme of the water inlet joint, two water outlets are provided, namely a first water outlet and a second water outlet, and the opening area of the first water outlet is larger than that of the second water outlet; the two water inlets are respectively a first water inlet and a second water inlet, and the opening area of the first water inlet is larger than that of the second water inlet; the first water inlet is opposite to the first water outlet, and the second water inlet is opposite to the second water outlet; the valve core can rotate between a first position and a second position relative to the joint body, when the valve core is located at the first position, the first water inlet is opposite to the water inlet pipe section, and the first water outlet is opposite to the water outlet pipe section; when the valve core is located at the second position, the second water inlet is opposite to the water inlet pipe section, and the second water outlet is opposite to the water outlet pipe section.

In an optional technical scheme of the water inlet joint, an arc-shaped limiting groove is formed in the outer side surface of the valve core, and the limiting groove is located above the water inlet and the water outlet; the side wall of the mounting pipe section is provided with a mounting hole; the water inlet joint also comprises a limiting pin, and one end of the limiting pin is connected with the mounting hole and then extends into the limiting groove; the limiting pin rotates relative to the limiting groove; when the limiting pin rotates to the first end of the limiting groove, the valve core is located at the first position; when the limit pin rotates to the second end of the limit groove, the valve core is located at the second position.

In an optional technical scheme of the water inlet joint, a second mounting channel communicated with the first mounting channel is further arranged in the valve core; and a pressure relief valve is arranged in the second installation channel.

In an optional technical scheme of the water inlet joint, a plugging ring is arranged in the second mounting channel; the relief valve comprises a plugging head, an elastic piece and a mounting ring, the mounting ring is mounted in the second mounting channel, two ends of the elastic piece are respectively abutted against the first end of the plugging head and the mounting ring, and the second end of the plugging head is abutted against the plugging ring.

In an optional technical scheme of the water inlet joint, a connecting flange and a first sealing groove are arranged on the outer side of the water inlet pipe section, and the connecting flange is located between the first sealing groove and the mounting pipe section; and a second sealing ring is arranged between the valve core and the mounting pipe section.

The water heater includes: : the water inlet connector comprises a water heater body and the water inlet connector, wherein the water heater body is provided with a water inlet port, and a water outlet pipe section of the water inlet connector is connected with the water inlet port in a sealing mode.

As can be understood by those skilled in the art, the water inlet joint of the water heater of the utility model is installed at the water inlet port and comprises a joint body and a valve core, wherein the joint body comprises a water passing pipe section and an installation pipe section arranged on the side wall of the water passing pipe section, and the installation pipe section divides the water passing pipe section into a water inlet pipe section and a water outlet pipe section which are opposite to each other, so that the resistance of water is reduced; the valve core is hermetically arranged in the installation pipe section, the bottom end of the valve core is provided with a first installation channel, the side wall of the first installation channel is provided with a water inlet and a water outlet which are opposite, the water inlet is provided with a first filter screen, the water outlet is provided with a second filter screen, and the mesh number of the first filter screen is smaller than or equal to that of the second filter screen, so that water passing through the valve core is filtered twice through the first filter screen and the second filter screen, the filtering effect is improved, the blockage of structures such as a valve of a water heater is avoided, and the service life of the water heater is prolonged; the filtering area is increased, and the decay speed of water flow is reduced. Under the condition that other conditions are not changed, the time that the water flow is reduced to the minimum opening flow of the whole water heater is prolonged. In addition, the valve core can be cleaned by being detached from the joint body, the operation is simple and convenient, and special personnel are not needed; the double-layer filter screen reduces the accumulation of impurities in the valve core, and can reduce the cleaning times of the filter screen, thereby being beneficial to reducing the use cost.

Drawings

Preferred embodiments of the water inlet joint and the water heater of the present invention will be described with reference to the accompanying drawings. The attached drawings are as follows:

FIG. 1 is a schematic structural diagram of a water inlet joint provided in an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a cross-sectional view B-B of FIG. 2;

FIG. 5 is a schematic structural view of a valve core and a limiting pin of the water inlet joint according to an embodiment of the present invention;

FIG. 6 is a schematic view of another directional structure of a valve core of the water inlet joint according to the embodiment of the present invention;

FIG. 7 is a front view of FIG. 6;

FIG. 8 is a cross-sectional view taken at C-C of FIG. 7;

FIG. 9 is a cross-sectional view taken along line D-D of FIG. 7;

fig. 10 is a schematic structural view of a joint body according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a direction of a pressure relief valve according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a pressure relief valve provided in an embodiment of the present invention in another direction.

In the drawings: 100: a connector body; 110: a water passing pipe section; 111: a water inlet pipe section; 112: a water outlet pipe section; 120: installing a pipe section; 130: mounting holes; 140: a connecting flange; 141: connecting holes; 150: a first seal groove; 200: a valve core: 210: a first mounting channel; 211: a first water inlet; 212: a second water inlet; 213: a first water outlet; 214: a second water outlet; 220: a limiting groove; 230: a second mounting channel; 231: a first channel; 232: a second channel; 233: a third channel; 240: a plugging ring; 250: a second seal groove; 300: a cylindrical screen; 310: a first filter screen; 320: a second filter screen; 400: a limit pin; 500: a pressure relief valve; 510: plugging a plug; 511: a plugging seat; 512: blocking; 520: an elastic member; 530: a mounting ring; 531: an adjusting ring; 532: a connecting ring; 610: a first seal ring; 620: and a second seal ring.

Detailed Description

First, it should be understood by those skilled in the art that these embodiments are merely for explaining technical principles of the embodiments of the present invention, and are not intended to limit the scope of the embodiments of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. For example, although the water inlet connector of the embodiment of the utility model is described in conjunction with a water heater, this is not limiting, and other devices having a water inlet requirement may be configured with the water inlet connector of the embodiment of the utility model, such as a water pump, a washing machine, and the like.

Next, it should be noted that, in the description of the embodiments of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or member must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present invention.

Furthermore, it should be noted that, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. Specific meanings of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

The import lug connection of current water heater water pipe, the long-time accumulation of large granule impurity such as silt in the running water not only leads to the structure such as valve of water heater to block up easily, still can influence the life of water heater.

In order to filter large particle impurities such as silt, a filtering structure, such as a filter screen, is usually installed in the water inlet pipe section or the joint. On one hand, however, the filter is limited by installation space and filtering area, which not only affects the filtering effect, but also affects the flow rate of water; on the other hand, the filter screen needs to be cleaned repeatedly, and needs the special personnel dismouting, leads to use cost to increase.

In view of this, the embodiment of the present invention provides a water inlet joint, wherein a filter valve core is hermetically inserted into a joint body and is fixed on the joint body through a screw, so that the water inlet joint is simple and convenient to assemble and disassemble, does not require professional staff, and reduces use cost; the filter valve core is provided with two opposite filter screens, and the mesh number of the two filter screens is different, so that not only can the filter area be increased, the filter effect be improved, but also the attenuation speed of the water flow can be slowed down, and the influence on the operation of the whole water heater is avoided.

The following describes a preferred technical scheme of the water inlet joint and the water heater of the embodiment of the utility model with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a water inlet joint provided in an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1; FIG. 3 is a cross-sectional view A-A of FIG. 2; fig. 4 is a sectional view B-B in fig. 2.

With reference to fig. 1 and 2, an embodiment of the present invention provides a water inlet joint, including: a fitting body 100 and a valve cartridge 200. The joint body 100 is used for connecting with a pipeline to be installed, and the joint body 100 provides an installation space for the valve core 200; the valve cartridge 200 functions as a filter.

The joint body 100 comprises a water passing pipe section 110 and an installation pipe section 120 arranged on the side wall of the water passing pipe section 110, wherein the water passing pipe section 110 is a straight pipe section, and the installation pipe section 120 can be perpendicular to the water passing pipe section 110, so that the valve core 200 can be conveniently disassembled and assembled, and the influence of a bent pipe section on water flow can be reduced.

The mounting section 120 divides the water flow pipe section 110 into opposing water inlet and outlet pipe sections 111 and 112. In the view of fig. 1, the left side of the installation pipe section 120 is the water inlet pipe section 111, the right side of the installation pipe section 120 is the water outlet pipe section 112, and the water inlet pipe section 111 and the water outlet pipe section 112 are opposite, so that the resistance of water can be reduced, the water flow rate can be improved, and the influence of the bent pipe section on the water flow rate can be avoided. The installation pipe section 120 and the water passing pipe section 110 are both circular pipes.

Fig. 10 is a schematic structural diagram of a joint body according to an embodiment of the present invention. Referring to fig. 10, the water inlet pipe section 111 and the water outlet pipe section 112 of the joint body 100 are respectively connected with the pipe to be installed in a sealing manner, and the connection manner may be various. Such as a snap fit, a threaded connection, an interference connection, etc. The connection mode of the water inlet pipe section 111 and the connection mode of the water outlet pipe section 112 can be the same or different.

In an exemplary embodiment, a connecting flange 140 and a first seal groove 150 are disposed on the outer side of the water inlet pipe section 111, the connecting flange 140 is located between the first seal groove 150 and the installation pipe section 120, and a first seal ring 610 is installed in the first seal groove 150. That is, the first sealing ring 610 is disposed between the water inlet pipe section 111 and the pipe to be installed, and the water inlet pipe section 111 and the pipe to be installed are connected by the connecting flange 140. Wherein, the connecting flange 140 is provided with a connecting hole 141, the flange plate on the pipeline to be installed is also provided with a fixing hole, and the bolts are respectively connected with the connecting hole 141 and the fixing hole, so as to fix the water inlet pipe section 111 on the pipeline to be installed.

One first seal groove 150 may be provided, and at this time, a first seal ring 610 is provided between the water inlet pipe section 111 and the pipe to be installed; or, a plurality of first seal grooves 150 are arranged at intervals along the axial direction of the water inlet pipe section 111, and at this time, a plurality of first seal rings 610 are arranged between the water inlet pipe section 111 and the pipeline to be installed, which is beneficial to improving the installation tightness of the water inlet pipe section 111. For example, the water inlet pipe section 111 is provided with two first seal grooves 150, but the number of the first seal grooves 150 is not limited thereto.

The water outlet pipe section 112 may be in interference connection, clamping connection, threaded connection, etc. with the pipe to be installed, which is not limited in the embodiment of the present invention.

In the embodiment, the water inlet pipe section 111 is connected through the connecting flange 140, and the water outlet pipe section 112 is connected in an interference manner, so that the water inlet pipe section 111 can be conveniently detached to clean impurities in the water inlet pipe section 111.

FIG. 5 is a schematic structural view of a valve core and a limiting pin of the water inlet joint according to an embodiment of the present invention; FIG. 6 is a schematic view of another directional structure of a valve core of the water inlet joint according to the embodiment of the present invention; FIG. 7 is a front view of FIG. 6; FIG. 8 is a cross-sectional view taken at C-C of FIG. 7; fig. 9 is a cross-sectional view taken along line D-D of fig. 7.

Referring to fig. 3 and 5, the bottom end of the valve cartridge 200 is sealingly fixed in the mounting tube segment 120. A second sealing ring 620 is provided between the valve cartridge 200 and the mounting tube segment 120. Referring to fig. 6 to 8, a second seal groove 250 is formed at an outer side of a bottom end of the valve body 200, and a second seal ring 620 is installed in the second seal groove 250. One second seal groove 250 may be provided, and in this case, one second seal ring 620 is provided; the number of the second seal grooves 250 may also be multiple, for example, two, and the multiple second seal grooves 250 are arranged at intervals along the axial direction of the valve core 200, and at this time, the number of the second seal rings 620 is multiple, which is beneficial to improving the sealing performance of the connection between the valve core 200 and the installation pipe section 120. The valve cartridge 200 and the mounting tube segment 120 may be mechanically secured by a stop pin 400 described below.

Referring to fig. 5 and 6, a first installation channel 210 is disposed at the bottom end of the valve core 200, and the cross section of the first installation channel 210 may be circular, which facilitates processing and subsequent installation of a filter screen. The side wall of the first installation channel 210 is provided with opposite water inlet and outlet ports, for example, a first water inlet port 211 and a first water outlet port 213. The water inlet is opposite to the water inlet pipe section 111, so that water in the water inlet pipe section 111 can enter the first installation channel 210 through the water inlet; the water outlet is opposite to the water outlet pipe section 112, so that water in the first installation channel 210 can enter the water outlet pipe section 112 through the water outlet.

With reference to fig. 4, the first filter screen 310 is installed at the water inlet of the present embodiment, and the second filter screen 320 is installed at the water outlet, so that the double-layer filtering is realized, and the filtering effect is improved. And, the mesh number of the first filter 310 is less than or equal to the mesh number of the second filter 320. That is, the aperture of the first filter 310 is greater than or equal to the aperture of the second filter 320, and the water in the water inlet pipe section 111 is primarily filtered by the first filter 310 to filter out larger-sized impurities; the water entering the first installation channel 210 is filtered by the second filter 320 for the second time, so as to filter smaller-sized impurities, and enters the water outlet pipe section 112, and the two-stage filtering can not only improve the filtering effect, but also prevent larger-sized particles from accumulating between the first filter 310 and the second filter 320 to influence the water flow rate.

In some embodiments, the mesh number of the first filter 310 is 30-50 meshes, for example, the mesh number of the first filter 310 is 40 meshes, which can prevent the filter effect from being affected by too large aperture due to too small mesh number of the first filter 310; and the influence on the water flow speed caused by the undersize of the aperture due to the overlarge mesh number of the first filter screen 310 can be avoided.

In some embodiments, the mesh number of the second filter 320 is 50-70 meshes, for example, the mesh number of the second filter 320 is 50 meshes, which can prevent the filter effect from being affected by too large aperture due to too small mesh number of the second filter 320; and the problem that the mesh number of the second filter screen 320 is too large to cause too small aperture, which causes a large amount of impurities to accumulate in the first mounting channel 210 and shortens the cleaning time of the filter screen can be avoided.

In some implementations, the first filter 310 and the second filter 320 are separately provided, and the first filter 310 and the second filter 320 are respectively fixed in the first mounting channel 210. So configured, it is convenient to replace and maintain the first filter 310 or the second filter 320 separately.

In other implementations, the water intake joint further includes a cylindrical screen 300, and the cylindrical screen 300 includes a first filter portion forming a first filter screen 310 and a second filter portion forming a second filter screen 320. That is, the first filter 310 and the second filter 320 are an integrated structure, so that they are convenient to disassemble and assemble. The cylindrical filter screen 300 may be clamped in the first installation channel 210, and the cylindrical filter screen 300 may also be fixed in the first installation channel 210 by screws, and the specific structure of the cylindrical filter screen 300 is not limited in the embodiment of the present invention.

Alternatively, the first filter 310 and the second filter 320 are respectively semi-circular arc-shaped, that is, half of the cylindrical filter 300 is the first filter 310, and the other half is the second filter 320. So set up, convenient balanced area of setting up water inlet and delivery port.

The valve cartridge 200 of the present embodiment can also regulate water flow. Specifically, referring to fig. 4, 5 and 9, two water outlets are provided, which are a first water outlet 213 and a second water outlet 214, and an opening area of the first water outlet 213 is larger than an opening area of the second water outlet 214, that is, a water flow rate of the first water outlet 213 is larger than a water flow rate of the second water outlet 214. The shape of the first water outlet 213 and the second water outlet 214 may be a rectangle, a circle, an ellipse, etc. disposed on the arc-shaped sidewall of the first mounting channel 210, and the shape of the first water outlet 213 and the second water outlet 214 is not limited in the embodiment of the present invention.

The water inlets are provided with two, which are the first water inlet 211 and the second water inlet 212, respectively, and the opening area of the first water inlet 211 is larger than that of the second water inlet 212, that is, the water inflow rate of the first water inlet 211 is larger than that of the second water inlet 212. Wherein, the shape of the first water inlet 211 and the second water inlet 212 may be a rectangle, a circle, an ellipse, etc. disposed on the arc-shaped side wall of the first installation channel 210, for example, the first water inlet 211 is a rectangle, and the second water inlet 212 is a circle.

The first water inlet 211 is opposite to the first water outlet 213, so that the water inlet joint has larger water flow; the second water inlet 212 is opposite the second water outlet 214 so that the water inlet joint has a smaller flow rate of water passing therethrough.

The valve cartridge 200 of the present embodiment is rotatable between a first position and a second position with respect to the joint body 100. When the valve core 200 is located at the first position, the first water inlet 211 is opposite to the water inlet pipe section 111, and the first water outlet 213 is opposite to the water outlet pipe section 112, at this time, the water inlet joint has a larger water flow rate. When the valve core 200 is located at the second position, the second water inlet 212 is opposite to the water inlet pipe section 111, and the second water outlet 214 is opposite to the water outlet pipe section 112, and at this time, the water inlet joint has a smaller water flow passing amount.

The water supply connector of this embodiment not only can improve the filter effect through double-deck filter screen filtration, can also rotate through case 200, adjusts water supply connector's water inlet flow, increases water supply connector's function.

Referring to fig. 3 and 5, an arc-shaped limiting groove 220 is disposed on an outer side surface of the valve core 200 of this embodiment, and the limiting groove 220 is located above the water inlet and the water outlet. The limiting groove 220 may be a quarter-circular arc groove. The second sealing groove 250 is located below the limiting groove 220, and the second sealing groove 250 is located above the water inlet and the water outlet.

Referring to fig. 10, the side wall of the mounting tube segment 120 is provided with a mounting hole 130. The water inlet joint of the embodiment further comprises a limiting pin 400, and one end of the limiting pin 400 is connected with the mounting hole 130 and then extends into the limiting groove 220. The mounting hole 130 may be a threaded hole, and one end of the limit pin 400 is connected with the mounting hole 130 through a thread and then extends into the limit groove 220; the other end of the stopper pin 400 is located outside the mounting hole 130.

The spacing pin 400 rotates relative to the spacing groove 220; when the limit pin 400 rotates to the first end of the limit groove 220, the valve core 200 is located at the first position; when the check pin 400 is rotated to the second end of the check groove 220, the valve spool 200 is located at the second position. The limiting recess 220 functions as a limiting and guiding.

By the arrangement, the limiting pin 400 and the limiting groove 220 are matched to play a fixing role relative to the axial positions of the fixed valve core 200 and the installation pipe section 120; the valve core 200 can also rotate circumferentially relative to the installation pipe section 120, and the limiting pin 400 and the limiting groove 220 cooperate to guide the rotation of the valve core 200.

With continued reference to fig. 3, 7 and 8, a second installation channel 230 communicated with the first installation channel 210 is further provided in the valve core 200, and a water flow sensor, a pressure relief valve and the like can be installed in the second installation channel 230 to increase the function of the water inlet joint, so that the water inlet joint has more functions under a simple structure.

Illustratively, a pressure relief valve 500 is installed in the second installation channel 230, so that the water inlet joint has a pressure relief function, and the safety and reliability of the use of the water inlet joint are improved.

Fig. 11 is a schematic structural diagram of a direction of a pressure relief valve according to an embodiment of the present invention; fig. 12 is a schematic structural diagram of a pressure relief valve provided in an embodiment of the present invention in another direction.

Referring to fig. 7 and 8, a blocking ring 240 is disposed within the second mounting channel 230. The second mounting channel 230 includes a first channel 231, a second channel 232, and a third channel 233 that are coaxial. The diameter of the first passage 231 is larger than that of the second passage 232, and the diameter of the first passage 231 is smaller than that of the third passage 233. The first end of the second passage 232 directly communicates with the first mounting passage 210. The second end of the second channel 232 is provided with a plugging ring 240, and the plugging ring 240 is a conical ring.

Because the diameter of the second channel 232 is smaller, the rear side of the side wall corresponding to the second channel 232 is thicker, the second sealing groove 250 is conveniently arranged, and the structural strength of the valve core 200 is prevented from being influenced by the arrangement of the second sealing groove 250.

Referring to fig. 3, 11 and 12, the relief valve 500 includes a blocking head 510, an elastic member 520 and an installation ring 530, the installation ring 530 is installed in the second installation channel 230, two ends of the elastic member 520 respectively abut against the installation ring 530 and a first end of the blocking head 510, and a second end of the blocking head 510 abuts against the blocking ring 240.

The mounting ring 530 comprises an adjusting ring 531 and a connecting ring 532, wherein the connecting ring 532 is mounted in the third channel 233, the outer side surface of the connecting ring 532 is in a wave shape shown in fig. 12, correspondingly, the inner side wall of the third channel 233 is in a wave shape, the connecting ring 532 is in interference connection with the third channel 233, the matching area of the connecting ring 532 and the third channel 233 is increased through the wave-shaped matching surface, and the mounting stability and reliability of the connecting ring 532 are improved. The inner side surface of the connecting ring 532 is provided with internal threads, the outer side surface of the adjusting ring 531 is provided with external threads, and the adjusting ring 531 is in threaded connection with the connecting ring 532. The central passage of the adjusting ring 531 is used to communicate with the first passage 231, achieving pressure relief.

The elastic member 520 may be a spring, a rubber sleeve, or the like having elasticity, and the elastic member 520 is located in the first passage 231. The first end of the elastic member 520 abuts against the adjusting ring 531, and the second end of the elastic member 520 abuts against the first end of the plugging head 510. The length of the threaded connection between the adjusting ring 531 and the connection ring 532 is adjusted to adjust the compression amount of the elastic member 520, thereby adjusting the abutting force of the elastic member 520 against the plugging head 510.

The plugging head 510 may include a plugging seat 511 and a plugging plug 512, wherein the plugging seat 511 includes a first cylindrical section and a second cylindrical section, an outer diameter of the first cylindrical section is smaller than an outer diameter of the second cylindrical section, and a first end face of the second cylindrical section abuts against a second end of the elastic member 520; the second end of second cylinder section is equipped with mounting groove, installs in the mounting groove and seals up stopper 512, seals up stopper 512 and seals up ring 240 butt.

In the water inlet joint of the embodiment, the sealing plug 512 is pressed on the sealing ring 240 through the elastic member 520 to realize sealing, so that water in the first installation channel 210 is prevented from flowing out through the second channel 232; when the water pressure in the first installation channel 210 exceeds the preset water pressure, the blocking plug 512 is jacked up to be away from the blocking ring 240 under the action of the water pressure, and the water in the first installation channel 210 enters the first channel 231 through the second channel 232 and flows out through the central channel of the adjusting ring 531, so that the pressure relief is realized.

The embodiment of the utility model also provides a water heater, which comprises a water heater body and the water inlet connector, wherein the water heater body is provided with a water inlet port, the water heater body comprises an inner container and an outer shell arranged outside the inner container, and the water inlet port is communicated with the inner container and extends to the outside of the outer shell. The water outlet pipe section of the water inlet joint is hermetically connected with the water inlet port, and the water inlet pipe section of the water inlet joint is connected with the tap water pipe.

Therefore, the water entering the water heater body is filtered by the water inlet connector to remove particles such as silt and the like, and the service life of the water heater is prolonged.

In summary, in the water heater provided by the embodiment of the present invention, the water inlet joint is installed at the water inlet port, and the water inlet joint includes the joint body 100 and the valve core 200, wherein the joint body 100 includes the water passing pipe section 110 and the installation pipe section 120 disposed on the side wall of the water passing pipe section 110, and the installation pipe section 120 divides the water passing pipe section 110 into the water inlet pipe section 111 and the water outlet pipe section 112 facing each other, so as to reduce the resistance of water; the valve core 200 is hermetically installed in the installation pipe section 120, the bottom end of the valve core 200 is provided with the first installation channel 210, the side wall of the first installation channel 210 is provided with a water inlet and a water outlet which are opposite, the water inlet is provided with the first filter screen 310, the water outlet is provided with the second filter screen 320, the mesh number of the first filter screen 310 is smaller than or equal to that of the second filter screen 320, so that the water passing through the valve core 200 is filtered twice through the first filter screen 310 and the second filter screen 320, the filtering effect is improved, the filtering area is increased, and the attenuation speed of the water flow is slowed down. Under the condition that other conditions are not changed, the time that the water flow is reduced to the minimum opening flow of the whole water heater is prolonged. In addition, the valve core 200 can be cleaned by being detached from the joint body 100, the operation is simple and convenient, and special personnel are not needed; the double-layer filter screen reduces the accumulation of impurities in the valve core 200, and can reduce the cleaning times of the filter screen, thereby being beneficial to reducing the use cost.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the utility model, and the technical scheme after the changes or substitutions can fall into the protection scope of the utility model.

Claims (10)

1. A water inlet fitting, comprising: a connector body and a valve core;

the joint body comprises a water passing pipe section and a mounting pipe section arranged on the side wall of the water passing pipe section, and the mounting pipe section divides the water passing pipe section into a water inlet pipe section and a water outlet pipe section which are opposite;

the bottom end of the valve core is fixed in the installation pipe section in a sealing mode, a first installation channel is arranged at the bottom end of the valve core, a water inlet and a water outlet which are opposite to each other are formed in the side wall of the first installation channel, the water inlet is opposite to the water inlet pipe section, and the water outlet is opposite to the water outlet pipe section;

the water inlet is provided with a first filter screen, the water outlet is provided with a second filter screen, and the mesh number of the first filter screen is smaller than or equal to that of the second filter screen.

2. The water inlet joint of claim 1, wherein the mesh number of the first filter screen is 30-50 meshes, or the mesh number of the first filter screen is 40 meshes;

the mesh number of the second filter screen is 50-70 meshes, or the mesh number of the second filter screen is 50 meshes.

3. The water intake joint of claim 1, further comprising a cylindrical screen comprising a first filter portion forming the first filter screen and a second filter portion forming the second filter screen.

4. The water intake joint of claim 3, wherein the first filter screen and the second filter screen are each semi-circular in shape.

5. The water inlet joint as claimed in claim 1, wherein there are two water outlets, namely a first water outlet and a second water outlet, and the opening area of the first water outlet is larger than that of the second water outlet;

the two water inlets are respectively a first water inlet and a second water inlet, and the opening area of the first water inlet is larger than that of the second water inlet; the first water inlet is opposite to the first water outlet, and the second water inlet is opposite to the second water outlet;

the valve core can rotate between a first position and a second position relative to the joint body, when the valve core is located at the first position, the first water inlet is opposite to the water inlet pipe section, and the first water outlet is opposite to the water outlet pipe section; when the valve core is located at the second position, the second water inlet is opposite to the water inlet pipe section, and the second water outlet is opposite to the water outlet pipe section.

6. The water inlet joint as claimed in claim 5, wherein the outer side surface of the valve core is provided with an arc-shaped limiting groove, and the limiting groove is positioned above the water inlet and the water outlet;

the side wall of the mounting pipe section is provided with a mounting hole;

the water inlet joint also comprises a limiting pin, and one end of the limiting pin is connected with the mounting hole and then extends into the limiting groove;

the limiting pin rotates relative to the limiting groove; when the limiting pin rotates to the first end of the limiting groove, the valve core is located at the first position; when the limit pin rotates to the second end of the limit groove, the valve core is located at the second position.

7. The water inlet joint according to any one of claims 1 to 6, wherein a second mounting channel is further provided in the valve core in communication with the first mounting channel; and a pressure relief valve is arranged in the second installation channel.

8. The water inlet joint of claim 7, wherein a blocking ring is disposed within the second mounting channel;

the relief valve comprises a plugging head, an elastic piece and a mounting ring, the mounting ring is mounted in the second mounting channel, two ends of the elastic piece are respectively abutted against the first end of the plugging head and the mounting ring, and the second end of the plugging head is abutted against the plugging ring.

9. The water inlet joint as claimed in any one of claims 1 to 6, wherein a connecting flange and a first sealing groove are arranged on the outer side of the water inlet pipe section, and the connecting flange is positioned between the first sealing groove and the mounting pipe section;

and a second sealing ring is arranged between the valve core and the mounting pipe section.

10. A water heater, comprising: the water heater body and the water inlet joint of any one of claims 1 to 9, wherein the water heater body is provided with a water inlet port, and a water outlet pipe section of the water inlet joint is hermetically connected with the water inlet port.

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