CN217207889U - Temperature sensing check valve and water heater - Google Patents

Abstract

The utility model discloses a temperature sensing check valve and water heater, temperature sensing check valve includes: a first valve body having a water inlet flow passage; the second valve body is provided with a water outlet flow channel and is fixedly connected with the first valve body, a mounting cavity is formed in the first valve body, or mounting cavities are formed in the first valve body and the second valve body, and the water inlet flow channel is communicated with the water outlet flow channel through the mounting cavity; the adjusting valve is movably arranged in the mounting cavity and used for opening or blocking an inlet of the water outlet flow passage; and the temperature control assembly is arranged in the mounting cavity and used for pushing the regulating valve to move towards or away from the water outlet flow channel according to the temperature of water flowing through the temperature control assembly. The utility model discloses temperature sensing check valve, its simple structure, easy dismounting has solved and has preheated the back and opened the pain point problem that cold water goes out hot water.

Description

Temperature sensing check valve and water heater

Technical Field

The utility model relates to a water heater technical field especially relates to a temperature sensing check valve and water heater.

Background

Zero cold water gas heater can realize hot water and open instant use, has become water heater industry trend. When the existing zero-cold-water gas water heater starts a preheating function, a built-in circulating pump operates to drive water stored in an external hot water pipe and a water return pipe to circularly flow and realize preheating.

During the preheating process, when the return water temperature T is monitored _{Go back to} > (predetermined temperature T) _{Preset of} Preheating temperature difference DeltaT _Preheating ) And when the preheating is finished, the circulating pump is closed and the preheating is stopped. When the zero-cold-water heater is actually used for preheating, the preheating temperature is controlled according to the preset temperature of a user, due to the heat loss of water stored in the circulating pipeline, the temperature rise of the backwater is slow, the preheating can be completed only by circularly heating for 2.5 circles, the time for the user to wait for the hot water is long (generally more than 4 min), the gas consumption is high, and the energy is not saved.

In addition, the two-pipe zero-cold-water gas water heater adopts the cold water pipe to replace a water return pipe, after preheating, the cold water pipe is filled with hot water with higher temperature, a large amount of hot water flows out when cold water is opened, household appliances such as a washing machine and a water purifier can be damaged, and a user can be scalded.

Disclosure of Invention

The utility model discloses aim at solving one of the problems that exist among the prior art to a certain extent at least, for this reason, the utility model provides a temperature sensing check valve, its simple structure, easy dismounting has solved and has preheated the back and opened the pain point problem that cold water goes out the hot water.

The utility model also provides a water heater of this temperature sensing check valve.

According to the temperature sensing one-way valve provided above, it is realized through following technical scheme:

a temperature sensitive one way valve comprising: a first valve body having a water inlet flow passage; the second valve body is provided with a water outlet flow channel and is fixedly connected with the first valve body, a mounting cavity is formed in the first valve body, or mounting cavities are formed in the first valve body and the second valve body, and the water inlet flow channel is communicated with the water outlet flow channel through the mounting cavity; the adjusting valve is movably arranged in the mounting cavity and used for opening or blocking an inlet of the water outlet flow passage; and the temperature control assembly is arranged in the mounting cavity and used for pushing the regulating valve to move towards or away from the water outlet flow channel according to the temperature of water flowing through the temperature control assembly.

In some embodiments, the temperature control assembly comprises: the temperature sensing elastic element is arranged in the mounting cavity, is positioned between the water inlet flow channel and the regulating valve and is used for pushing the regulating valve to move towards the water outlet flow channel when the temperature of water flowing through the regulating valve is increased; the resetting elastic piece is arranged in the installation cavity and positioned between the regulating valve and the water outlet flow channel and used for pushing the regulating valve to deviate from the water outlet flow channel to move.

In some embodiments, the first valve body is provided with a plurality of cutting grooves at intervals in the circumferential direction at positions corresponding to the temperature-sensitive elastic piece, and each cutting groove is communicated with the mounting cavity.

In some embodiments, the regulator valve comprises: the shell is provided with a shaft hole and a water through hole positioned on the periphery of the shaft hole, and can move towards or away from the water outlet flow channel under the pushing of the temperature control component; one end of the valve core assembly is movably inserted into the shaft hole, the other end of the valve core assembly is provided with a first plugging part used for opening or plugging an inlet of the water outlet flow channel, one end of the valve core assembly close to the shaft hole is provided with a second plugging part, and the second plugging part is used for opening or plugging the water through hole; the elastic body is sleeved on the outer surface of the valve core assembly and used for pushing the valve core assembly to move towards the water through port.

In some embodiments, the valve core assembly includes a first valve core and a second valve core, one end of the second valve core is provided with a mounting groove opening toward the first valve core, the other end of the second valve core is provided with the first blocking portion, two opposite ends of the first valve core are movably inserted into the shaft hole and the mounting groove respectively, and the outer surface of the first valve core is provided with the second blocking portion extending outwards.

In some embodiments, the valve core assembly further comprises a cover body, the cover body is provided with a central hole and an opening through which water flows, the cover body is sleeved on the outer surface of the valve core assembly and is located between the first blocking portion and the second blocking portion, the shell is detachably connected with the cover body, and two opposite ends of the elastic body are respectively abutted to the cover body and the second blocking portion.

In some embodiments, a first seal is provided between the housing and a wall of the mounting cavity; and/or a second sealing element is arranged on one side, facing the water through opening, of the second plugging part.

In some embodiments, a mounting opening is formed in one end, close to the second valve body, of the first valve body, one end of the second valve body is inserted into the mounting opening, and the second valve body is fixedly connected with the first valve body through a connecting piece or a threaded structure.

In some embodiments, the first valve body is provided with a hot water outlet communicating with the water inlet channel and/or the mounting cavity, and/or the second valve body is provided with a cold water outlet communicating with the water outlet channel.

According to the water heater that provides above-mentioned, it realizes through following technical scheme:

a water heater, comprising: the water heater comprises a water heater body, a water inlet connector and a water outlet connector, wherein the water heater body is provided with an inner water pipe, the water inlet connector and the water outlet connector; a temperature sensitive one way valve as described above; the opposite two ends of the outer hot water pipe are respectively communicated with the water outlet interface and the inlet of the water inlet flow channel; and one end of the outer cold water pipe is communicated with the outlet of the water outlet flow passage, and the other end of the outer cold water pipe is respectively communicated with tap water and the water inlet connector.

Compared with the prior art, the utility model discloses an at least including following beneficial effect:

the utility model discloses a temperature sensing check valve, through the first valve body that will have outlet flow way and installation cavity and the second valve body fastening connection who has outlet flow way as an organic whole to install governing valve and temperature control component movably in the installation cavity, temperature control component can promote the governing valve orientation or deviate from the outlet flow way and remove according to the temperature of flowing through it, simple structure makes things convenient for governing valve and temperature control component's quick assembly disassembly, has solved the painful point problem of opening cold water outlet hot water after preheating simultaneously.

Drawings

Fig. 1 is an explosion diagram of a temperature sensing check valve in embodiment 1 of the present invention;

fig. 2 is a sectional view of the outlet flow passage of the thermostatic check valve in embodiment 1 of the present invention when opened;

fig. 3 is a partially enlarged view of a portion a in fig. 2;

fig. 4 is a sectional view of the outlet flow passage of the thermostatic check valve in embodiment 1 of the present invention when it is cut off;

fig. 5 is a schematic structural view of a temperature sensing check valve in embodiment 2 of the present invention;

fig. 6 is a cross-sectional view of the outlet flow passage of the thermostatic check valve in embodiment 2 of the present invention when opened

Fig. 7 is a schematic structural diagram of a water heater according to embodiment 3 of the present invention.

Reference numerals: the water heater comprises a first valve body 1, a water inlet flow channel 11, an installation cavity 12, a hot water outlet 13, a first limiting part 14, a limiting step 15, a cutting groove 16, an installation opening 17 and a first flange part 18;

the second valve body 2, the water outlet flow channel 21, the cold water outlet 22, the second flange part 23, the annular groove 24 and the sealing ring 25;

the control valve 3, the housing 31, the shaft hole 311, the water passage port 312, the first valve element 32, the second blocking portion 321, the second valve element 33, the first blocking portion 331, the mounting groove 332, the elastic body 34, the cover 35, the opening 351, the first sealing member 36, the second sealing member 37, and the valve housing 38;

a temperature-sensitive elastic member 4; a return elastic member 5; a connecting piece 6;

the water heater comprises a water heater body 7, an inner water pipe 71, a water inlet connector 72 and a water outlet connector 73;

an outer cold water pipe 81 and an outer hot water pipe 82.

Detailed Description

The present invention is illustrated by the following examples, but the present invention is not limited to these examples. To the embodiment of the present invention, modify or replace some technical features, without departing from the spirit of the present invention, it should be covered in the technical solution scope of the present invention.

Example 1

Referring to fig. 1 to 4, the present embodiment provides a temperature-sensing check valve, which is applied to a water heater with a zero-cold water function. The temperature sensing one-way valve comprises a first valve body 1, a second valve body 2, a regulating valve 3 and a temperature control assembly (not shown in the figure), wherein the first valve body 1 is provided with a water inlet flow passage 11 and a mounting cavity 12 which are arranged along the water flow direction and are sequentially communicated. The second valve body 2 has a transversely arranged outlet flow channel 21. During installation, the second valve body 2 is tightly connected with one end of the first valve body 1 close to the installation cavity 12, and the water outlet flow passage 21 is communicated with the water inlet flow passage 11 through the installation cavity 12. The regulating valve 3 is movably disposed in the mounting chamber 12 and has a passage (not shown) through which water flows, and the regulating valve 3 has a first blocking portion 331 for opening or blocking an inlet of the outlet flow passage 21. The temperature control component is arranged in the mounting cavity 12 and used for pushing the regulating valve 3 to move towards or away from the water outlet flow channel 21 according to the temperature of water flowing through the temperature control component.

When water flows into the installation cavity 12 from the water inlet channel 11, when the temperature of the water flowing through the temperature control component is lower than a specific temperature (about 35 ℃ is assumed), the temperature control component pushes the regulating valve 3 towards the water inlet channel 11, so that the first blocking portion 331 of the regulating valve 3 is far away from the inlet of the water outlet channel 21, and the installation cavity 12 is communicated with the water outlet channel 21, as shown in fig. 2. When the temperature of the water flowing through the temperature control assembly is higher than a specific temperature, the temperature control assembly is switched to push the regulating valve 3 to the water outlet flow channel 21, so that the first blocking portion 331 of the regulating valve 3 is tightly attached to the inlet of the water outlet flow channel 21, the passage between the installation cavity 12 and the water outlet flow channel 21 is cut off, referring to fig. 4, hot water with higher temperature after preheating is prevented from flowing into the water inlet flow channel 11 from the water outlet flow channel 21, the flow of the hot water after preheating into the cold water pipe is effectively reduced, and the problem of pain of the hot water of boiled cold water after preheating is solved.

It is thus clear that this embodiment is as an organic whole through the first valve body 1 that will have outlet flow channel 21 and installation cavity 12 and the second valve body 2 fastening connection that has outlet flow channel 21 to install governing valve 3 and temperature control component movably in installation cavity 12, temperature control component can promote governing valve 3 orientation or deviate from outlet flow channel 21 and remove according to the temperature that flows through it, moreover, the steam generator is simple in structure, make things convenient for governing valve 3 and temperature control component's quick assembly disassembly, the painful point problem of opening cold water and going out hot water after preheating has been solved simultaneously.

Referring to fig. 1 to 3, the bottom of the first valve body 1 is further provided with a downwardly extending hot water outlet 13, and the hot water outlet 13 is communicated with the water inlet channel 11 and/or the mounting cavity 12, so that the first valve body 1 is T-shaped as a whole. In this embodiment, the hot water outlet 13 is connected to the installation cavity 12 as an example, in order to facilitate connection between the hot water outlet 13 and the water inlet end of the water inlet channel 11 and other water pipes, the outer surfaces of the hot water outlet 13 and the water inlet channel 11 are respectively provided with thread cutting, so that the first valve body 1 and other water pipes are stably and reliably connected into a whole, and the connection part is prevented from being flushed away by water flow.

The mounting cavity 12 comprises a rear cavity and a front cavity located between the rear cavity and the water inlet channel 11, and the front cavity is respectively communicated with the water inlet channel 11, the mounting cavity 12 and the rear cavity. The diameter of the front cavity is larger than that of the water inlet channel 11, so that a step is formed at the joint of the water inlet channel 11 and the front cavity, and the step forms a first limiting part 14. The diameter of the front cavity is smaller than that of the rear cavity, so that a limiting step 15 is formed at the joint of the front cavity and the rear cavity, and the limiting step 15 is used for limiting the movement of the regulating valve 3.

One end of the first valve body 1 close to the second valve body 2 is provided with a mounting opening 17 which is opened towards the second valve body 2, and the diameter of the mounting opening 17 is larger than the diameter of the rear cavity of the mounting cavity 12. When the valve is installed, one end of the second valve body 2 close to the first valve body 1 is inserted into the installation opening 17.

In order to facilitate the reliable connection of the second valve body 2 and the first valve body 1, and prevent water leakage caused by water flow rushing away the joint, the first valve body 1 is provided with a first flange part 18 extending outwards in the circumferential direction of the opening of the mounting opening 17, correspondingly, one end of the second valve body 2 close to the first flange part 18 is provided with a second flange part 23 extending outwards in the circumferential direction, the second flange part 23 abuts against the first flange part 18, and the two are detachably connected through a connecting piece 6 (such as a snap ring, a clamp hoop or a snap spring), and can also be connected by threads.

In order to avoid water leakage at the matching position of the second valve body 2 and the mounting port 17, an inwardly concave annular groove 24 is circumferentially arranged at one end of the second valve body 2 extending into the mounting port 17, and a sealing ring 25 abutting against the wall surface of the mounting port 17 is mounted in the annular groove 24, so that the air tightness between the second valve body 2 and the mounting port 17 is improved.

In this embodiment, the bottom of the second valve body 2 is provided with a cold water outlet 22 extending downward, and the outer surfaces of the cold water outlet 22 and the water outlet end of the water outlet flow passage 21 are provided with thread cuts, so that the cold water outlet 22 and the water outlet end of the water outlet flow passage 21 are respectively connected to different water pipes stably and reliably.

Referring to fig. 2 to 3, the temperature control assembly includes a temperature sensing elastic element 4 and a reset elastic element 5, the adjusting valve 3 is movably installed in the rear cavity of the installation cavity 12, and when the adjusting valve 3 moves towards the water inlet channel 11, the adjusting valve is limited by the limiting step 15. The temperature-sensing elastic element 4 is preferably a memory alloy spring, and is disposed in the front cavity of the mounting cavity 12, and opposite ends of the temperature-sensing elastic element abut against the first limiting portion 14 and the regulating valve 3, respectively, for pushing the regulating valve 3 to move toward the water outlet flow passage 21 when the temperature of water flowing through the temperature-sensing elastic element rises. The elastic restoring element 5 is preferably a restoring spring, is arranged in the rear cavity of the installation cavity 12, and two opposite ends of the elastic restoring element abut against the inlet edges of the regulating valve 3 and the water outlet flow passage 21 respectively, and the elastic restoring element 5 is used for pushing the regulating valve 3 to move away from the water outlet flow passage 21. Thereby, the regulating valve 3 is moved toward or away from the outlet flow passage 21 by the combined force of the temperature-sensitive elastic member 4 and the return elastic member 5.

The memory alloy spring has temperature variation characteristic, and the elasticity thereof is increased along with the temperature rise, so that the resultant force of the temperature sensing elastic element 4 and the return elastic element 5 is changed along with the change of the water temperature. When the temperature of the water flowing through the memory alloy spring is lower than the specific temperature, the elastic force of the memory alloy spring is smaller than the elastic force of the return spring, and the first blocking portion 331 of the regulating valve 3 is automatically pushed to the water inlet flow channel 11 under the resultant force action, so that the mounting cavity 12 is communicated with the water outlet flow channel 21, as shown in fig. 2. When the temperature of the water flowing through the memory alloy spring is higher than the specific temperature, the elastic force of the memory alloy spring is larger than that of the return spring, and the regulating valve 3 is automatically pushed to the water outlet flow channel 21 under the resultant force action, so that the first blocking portion 331 of the regulating valve 3 is tightly attached to the inlet of the water outlet flow channel 21, and the passage between the installation cavity 12 and the water outlet flow channel 21 is cut off, as shown in fig. 4, hot water with higher temperature after preheating is prevented from flowing into the water inlet flow channel 11 from the water outlet flow channel 21, and the problem of pain points of the hot water after the hot water is preheated and boiled is solved.

Referring to fig. 3, the adjusting valve 3 includes a housing 31, a valve core assembly (not shown in the figure), and an elastic body 34, wherein the housing 31 is movably disposed in the rear cavity of the mounting cavity 12, and the front end of the housing abuts against the temperature-sensing elastic member 4, the rear end of the housing is detachably connected to a cover 35, and the cover 35 abuts against the elastic return member 5. Thus, the housing 31 can be pushed to move toward or away from the outlet flow passage 21 by the combined force of the temperature-sensitive elastic element 4 and the return elastic element 5. The housing 31 has a cavity (not shown) opening toward the return elastic member 5, and a shaft hole 311 at the center and a water passage port 312 at the periphery of the shaft hole 311 are provided at the front end of the housing 31. The cover 35 has a central hole (not shown) and a plurality of openings 351 spaced apart from and around the central hole, and opposite ends of the cavity communicate with the openings 351 and the water openings 312, respectively, to form a passage for water to flow through.

The valve core assembly transversely penetrates through the central hole, the front end of the valve core assembly is movably inserted into the shaft hole 311, and the rear end of the valve core assembly is provided with a first plugging portion 331 for opening or plugging the inlet of the water outlet flow passage 21. In addition, a second blocking portion 321 is disposed at one end of the valve core assembly close to the shaft hole 311, and the second blocking portion 321 is located in the cavity and is used for opening or blocking the water passage port 312. The elastic body 34 is preferably a small spring, and is disposed in the cavity and sleeved on the outer surface of the valve core assembly, and opposite ends of the elastic body 34 respectively abut against the cover body 35 and the second blocking portion 32, so as to push the valve core assembly to move toward the water passage opening 312, so that the second blocking portion 32 blocks the water passage opening 312.

When no water flows to the water passage port 312 of the housing 31, the combined force of the temperature-sensitive elastic element 4 and the return elastic element 5 pushes the housing 31 and the valve core assembly toward the water inlet flow passage 11, so that the housing 31 abuts against the first stopper 14, and the mounting cavity 12 communicates with the water outlet flow passage 21. At the same time, the elastic force of the elastic body 34 pushes the second blocking portion 321 toward the water passage opening 312, so that the second blocking portion 321 blocks the water passage opening 312, thereby preventing the running water from flowing into the water outlet passage 21 and flowing into the water inlet passage 11. When water flows to the water passage port 312 of the housing 31, the second blocking portion 321 is pushed open by the water flow so that the second blocking portion 321 opens the water passage port 312, and at this time, the water flows from the water passage port 312 to the water outlet flow passage 21 through the cavity, the opening 351, and the rear cavity of the mounting chamber 12 in this order.

The valve core assembly comprises a first valve core 32 and a second valve core 33, and the second valve core 33 and the cover body 35 are connected into a whole in a buckling mode so that the cover body 35 and the second valve core 33 move synchronously. The front end of the second valve core 33 is provided with a mounting groove 332 opening towards the first valve core 32, the rear end is provided with a first blocking part 331, the two opposite ends of the first valve core 32 are movably inserted into the shaft hole 311 and the mounting groove 332 respectively, and the middle part of the outer surface of the first valve core 32 is provided with a second blocking part 321 extending outwards, so that the first valve core 32 is in a cross shape.

In order to avoid water from between the housing 31 and the wall of the installation cavity 12, an annular installation groove recessed towards the inside is circumferentially arranged on the outer surface of the front end of the housing 31, and a first sealing element 36 abutting against the wall of the installation cavity 12 is arranged in the annular installation groove.

In order to ensure the sealing effect of the second closing portion 321 closing the water passage port 312, a second seal 37 is provided on the side of the second closing portion 321 facing the water passage port 312, and the second seal 37 is preferably a gasket. In addition, in order to ensure the blocking effect of the first blocking portion 331 on the inlet of the outlet flow channel 21 and to prevent the first blocking portion 331 from being in rigid contact with the inlet of the outlet flow channel 21, which causes the contact portion to be worn and water leakage, the outer surface of the first blocking portion 331 is coated with the valve sleeve 38, and the valve sleeve 38 is made of rubber material.

In this embodiment, the outer surface of one end of the second valve element 33 close to the first blocking portion 331 is provided with an inward concave clamping groove, the valve sleeve 38 is correspondingly provided with a clamping portion, during installation, the valve sleeve 38 is sleeved on the outer surface of the first blocking portion 331, and the clamping portion is clamped with the clamping groove in a matching manner, so that the valve sleeve 38 is reliably installed on the second valve element 33.

Example 2

Referring to fig. 5 to 6, the present embodiment is different from embodiment 1 in that the first valve body 1 and the second valve body 2 are different in structure. The present embodiment shortens the lengths of the first valve body 1 and the second valve body 2 and omits the hot water outlet 13 and the cold water outlet 22.

Specifically, a mounting cavity 12 is formed in the first valve body 1 and the second valve body 2, a front cavity suitable for assembling the mounting cavity 12 of the temperature-sensitive elastic element 4 is formed in the first valve body 1, and the diameter of the front cavity of the mounting cavity 12 is larger than that of the water inlet flow passage 11, so that a first limiting part 14 is formed at the joint. In addition, the water outlet end of the water inlet channel 11 extends backwards to extend into the front cavity, so that the water outlet end of the water inlet channel 11 is inserted into the temperature-sensing elastic element 4, and the temperature-sensing elastic element 4 is positioned and guided to a certain extent, thereby preventing the temperature-sensing elastic element 4 from shifting in the movement process.

A plurality of cutting grooves 16 are circumferentially arranged at intervals at the position of the first valve body 1 corresponding to the temperature-sensitive elastic piece 4, and each cutting groove 16 is communicated with the front cavity of the mounting cavity 12. Therefore, through the cutting groove 16, whether the temperature-sensing elastic element 4 assembled in the front cavity of the installation cavity 12 is mistaken or not can be checked, meanwhile, the mark prompting effect can be achieved, the situation of reverse assembly cannot occur when the temperature-sensing one-way valve is assembled on the water heater, and the assembly accuracy and efficiency are improved.

One end of the first valve body 1 close to the second valve body 2 is provided with a mounting opening, and the diameter of the mounting opening is larger than that of the front cavity of the mounting cavity 12. The front end of the second valve body 2 is inserted into the mounting opening, and the wall surface of the mounting opening is in threaded connection with the front end of the second valve body 2.

The end of the second valve body 2 close to the first valve body 1 is provided with a rear cavity of a mounting cavity 12 opening forward, which is suitable for assembling the regulating valve 3 and the return elastic element 5. The diameter of the rear cavity is larger than that of the front cavity and smaller than that of the mounting opening, so that a limiting step 15 is formed at the matching position of the front end of the rear cavity, the mounting opening and the front cavity.

One end of the second valve body 2, which is far away from the first valve body 1, is provided with a water outlet flow passage 21, and the front end of the water outlet flow passage 21 extends forwards to extend into the rear cavity, so that the front end of the water outlet flow passage 21 is inserted into the reset elastic part 5, and the reset elastic part 5 is positioned and guided to a certain extent, and the reset elastic part 5 is prevented from shifting in the movement process.

It can be seen that compared with embodiment 1, the temperature-sensing one-way valve of this embodiment has a more compact overall structure, occupies a smaller space, and is beneficial to reducing the overall cost, and meanwhile, the assembly of the temperature-sensing one-way valve is guided by the plurality of cutting grooves 16 on the first valve body 1, so that the probability of wrong assembly is reduced.

Example 3

The present embodiment provides a water heater having a zero cold water function, which includes a water heater body 7, a temperature-sensitive one-way valve as described in embodiment 1 or 2, an outer cold water pipe 81, and an outer hot water pipe 82. The water heater body 7 is provided with an inner water pipe 71, a water inlet connector 72 and a water outlet connector 73, wherein the water inlet section and the water outlet section of the inner water pipe 71 are respectively communicated with the water inlet connector 72 and the water outlet connector 73. A water flow sensor, a water pump and a water inlet temperature probe which are respectively and electrically connected with the controller are arranged on the inner water pipe 71. One end of the outer cold water pipe 81 is connected to the outlet of the water outlet channel 21, and the other end is connected to the tap water and the water inlet port 72. The opposite ends of the outer hot water pipe 82 are respectively communicated with the water outlet port 73 and the inlet of the water inlet flow passage 11.

Referring to fig. 7, in the present embodiment, an external cold water pipe 81 is used as a water return pipe, a temperature-sensing check valve is disposed at a bathing tap at a remote water consumption point, an inlet of a water inlet flow passage 11 of the temperature-sensing check valve is connected to an external hot water pipe 82, a hot water outlet 13 is connected to a hot water end of the bathing tap, an outlet of a water outlet flow passage 21 is connected to the external cold water pipe 81, and a cold water outlet 22 is connected to a cold water end of the bathing tap. The conducting direction of the regulating valve 3 in the temperature sensing one-way valve is that hot water flows to cold water, and the cold water is prevented from flowing to a hot water end of the bath faucet.

When the water heater main body 7 is in the standby mode, the user starts the preheating function through the operation display electrically connected with the controller. The controller starts the water pump, if the water flow of the inner water pipe 71 measured by the water flow sensor is larger than the program starting flow (generally 2.5L/min), the controller starts the machine to ignite and preheat the circulating pipeline to store water, otherwise, the controller gives an alarm for preheating fault.

In the preheating operation mode, the controller monitors the circulating flow in real time through the water flow sensor, when the circulating hot water flows to the temperature sensing one-way valve, the elastic force of the temperature sensing elastic piece 4 is increased along with the circulating hot water, the valve plug 38 of the regulating valve 3 is pushed to the cold water end to block the inlet of the water outlet flow channel 21, and the cold and hot water path is cut off. At the moment, if the water flow measured by the water flow sensor is smaller than the program starting-up flow and the water flow is identified to be the circulating hot water flow to the farthest water using point, the controller turns off the water pump and exits the preheating mode.

In the preheating operation mode, when the condition of program preheating pump closing is achieved, the controller closes the water pump, exits the preheating mode and restores to the standby mode.

Therefore, the water heater of the embodiment has the advantages that the temperature sensing one-way valve is arranged at the position of the bath faucet of the far-end water consumption point, the on-off of the cold and hot water path in the preheating process is controlled by utilizing the temperature characteristic of the memory alloy spring, the preheating time and the air consumption are greatly reduced, and the time and the energy are saved. Meanwhile, the flow of preheated hot water into the cold water pipe is reduced, and the problem of pain of the preheated boiled cold water and the hot water is solved.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims (10)

1. A temperature sensitive one-way valve, comprising:

a first valve body (1) having a water inlet flow passage (11);

the second valve body (2) is provided with a water outlet flow channel (21), the second valve body (2) is fixedly connected with the first valve body (1), a mounting cavity (12) is formed in the first valve body (1), or mounting cavities (12) are formed in the first valve body (1) and the second valve body (2), and the water inlet flow channel (11) is communicated with the water outlet flow channel (21) through the mounting cavity (12);

the adjusting valve (3) is movably arranged in the mounting cavity (12) and is used for opening or blocking an inlet of the water outlet flow channel (21);

the temperature control assembly is arranged in the installation cavity (12) and used for pushing the adjusting valve (3) to move towards or away from the water outlet flow channel (21) according to the temperature of water flowing through the temperature control assembly.

2. The temperature sensitive one-way valve of claim 1, wherein the temperature control assembly comprises:

the temperature sensing elastic element (4) is arranged in the mounting cavity (12), is positioned between the water inlet flow channel (11) and the regulating valve (3), and is used for pushing the regulating valve (3) to move towards the water outlet flow channel (21) when the temperature of water flowing through the temperature sensing elastic element is increased;

the resetting elastic piece (5) is arranged in the installation cavity (12) and located between the adjusting valve (3) and the water outlet flow channel (21) and used for pushing the adjusting valve (3) to deviate from the water outlet flow channel (21) to move.

3. A temperature-sensitive one-way valve according to claim 2, wherein a plurality of cutting grooves (16) are circumferentially spaced at positions of the first valve body (1) corresponding to the temperature-sensitive elastic member (4), and each cutting groove (16) is communicated with the mounting cavity (12).

4. A temperature sensitive one way valve according to claim 1, wherein the regulating valve (3) comprises:

the shell (31) is provided with a shaft hole (311) and a water through port (312) positioned on the periphery of the shaft hole (311), and the shell (31) can move towards or away from the water outlet flow channel (21) under the pushing of the temperature control component;

one end of the valve core assembly is movably inserted into the shaft hole (311), the other end of the valve core assembly is provided with a first plugging portion (331) used for opening or plugging an inlet of the water outlet flow channel (21), one end of the valve core assembly close to the shaft hole (311) is provided with a second plugging portion (321), and the second plugging portion (321) is used for opening or plugging the water through port (312);

the elastic body (34) is sleeved on the outer surface of the valve core assembly and used for pushing the valve core assembly to move towards the water through port (312).

5. The temperature-sensing one-way valve according to claim 4, wherein the valve core assembly comprises a first valve core (32) and a second valve core (33), one end of the second valve core (33) is provided with a mounting groove (332) opening towards the first valve core (32), the other end is provided with the first blocking portion (331), two opposite ends of the first valve core (32) are movably inserted into the shaft hole (311) and the mounting groove (332), respectively, and the outer surface of the first valve core (32) is provided with the second blocking portion (321) extending outwards.

6. The temperature-sensing one-way valve according to claim 4 or 5, further comprising a cover body (35), wherein the cover body (35) is provided with a central hole and an opening (351) for water to pass through, the cover body (35) is sleeved on the outer surface of the valve core assembly and is located between the first blocking portion (331) and the second blocking portion (321), the shell (31) is detachably connected with the cover body (35), and two opposite ends of the elastic body (34) are respectively abutted against the cover body (35) and the second blocking portion (321).

7. A temperature-sensitive one-way valve according to claim 4, wherein a first seal (36) is provided between the housing (31) and the wall of the mounting chamber (12); and/or a second sealing piece (37) is arranged on one side, facing the water through opening (312), of the second blocking part (321).

8. The temperature-sensing one-way valve according to claim 1, wherein a mounting opening (17) is formed at one end of the first valve body (1) close to the second valve body (2), one end of the second valve body (2) is inserted into the mounting opening (17), and the second valve body (2) is tightly connected with the first valve body (1) through a connecting piece (6) or a thread structure.

9. A temperature-sensitive one-way valve according to claim 1, wherein the first valve body (1) is provided with a hot water outlet (13) communicating with the water inlet channel (11) and/or the mounting cavity (12), and/or the second valve body (2) is provided with a cold water outlet (22) communicating with the water outlet channel (21).

10. A water heater, comprising:

the water heater comprises a water heater body (7) and a water outlet pipe, wherein the water heater body is provided with an inner water pipe (71), a water inlet connector (72) and a water outlet connector (73);

a temperature sensitive one way valve according to any one of claims 1 to 9;

the opposite ends of the outer hot water pipe (82) are respectively communicated with the water outlet interface (73) and the inlet of the water inlet flow channel (11);

and one end of the outer cold water pipe (81) is communicated with the outlet of the water outlet flow channel (21), and the other end of the outer cold water pipe is respectively communicated with tap water and the water inlet connector (72).

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