CN218761595U - Temperature control valve and water heater - Google Patents

Abstract

The utility model discloses a temperature-sensing valve and water heater. The temperature control valve is arranged in a circulating water path of the water heater and is positioned at a water consumption point, the temperature control valve comprises a valve body, a valve cavity is arranged in the temperature control valve, a hot water inlet and a hot water outlet which are communicated with the valve cavity are formed in the first part of the valve body, the hot water inlet is communicated with the hot water outlet, a cold water inlet and a cold water outlet which are communicated with the valve cavity are formed in the second part of the valve body, and the cold water inlet is communicated with the cold water outlet; the temperature control stop valve is detachably arranged in the valve cavity and used for controlling the connection and disconnection between the hot water inlet and the cold water inlet, and when the temperature of water in the valve cavity is lower than a preset temperature T, the temperature control stop valve opens the connection between the hot water inlet and the cold water inlet; and when the water temperature in the valve cavity reaches above a preset temperature T, the temperature control stop valve closes the communication between the hot water inlet and the cold water inlet.

Description

Temperature control valve and water heater

Technical Field

The utility model relates to a household electrical appliances technical field especially relates to a temperature-sensing valve and water heater.

Background

In the prior art, when the zero-cold-water heater operates the preheating function, the preheating temperature is controlled according to the temperature preset by a user. Because the water in the circulating pipeline of the water heater has heat loss, the temperature of the return water in the circulating pipeline is slowly raised, the preheating can be completed generally by circularly heating for 2 to 3 circles, the user has long time (generally more than 4 min) for waiting for hot water, excessive gas is consumed, and the energy-saving property is poor. And adopt the zero cold water gas heater of two tubs of cold water pipe replacement return water pipe, cold water pipe then can be in preheating the back, is full of the hot water that scalds, and the user can flow out a large amount of hot water when opening cold water mode with the water spot, causes the damage of household electrical appliances such as washing machine, water purifier.

Therefore, a thermostatic valve is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

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 control valve can reduce the energy consumption of water heater, when using in the water heater that adopts the water pipe as the return water route, can also avoid the return water route to be full of hot water and lead to the user to open the cold water mode of water point, but the hot water of outflow to cause the problem of the damage of household electrical appliances such as washing machine, water purifier in user's home.

The above purpose is realized by the following technical scheme:

a temperature-controlled valve installed in a circulation water path of a water heater at a water use point, the temperature-controlled valve comprising:

the valve comprises a valve body, a valve cavity is arranged in the valve body, a hot water inlet and a hot water outlet which are communicated with the valve cavity are formed in the first part of the valve body, the hot water inlet is communicated with the hot water outlet, a cold water inlet and a cold water outlet which are communicated with the valve cavity are formed in the second part of the valve body, and the cold water inlet is communicated with the cold water outlet;

the temperature control stop valve is detachably arranged in the valve cavity and used for controlling the connection and disconnection between the hot water inlet and the cold water inlet, and when the temperature of water in the valve cavity is lower than a preset temperature T, the temperature control stop valve opens the connection between the hot water inlet and the cold water inlet; and when the water temperature in the valve cavity reaches above a preset temperature T, the temperature control stop valve closes the communication between the hot water inlet and the cold water inlet.

Optionally, the temperature-controlled shutoff valve comprises:

the valve cavity is internally provided with a through hole, the side wall of the shell is provided with a water trough, water in the valve cavity can flow into the through hole through the water trough, one end of the shell, which is close to the cold water inlet, is provided with a water outlet, and the shell is arranged in the valve cavity and is detachably connected with the inner wall of the valve cavity;

the plug is arranged in the through hole, and the diameter of the plug is larger than that of the water outlet;

the deformation module is arranged in the through hole, one end of the deformation module is abutted to one end, far away from the cold water inlet, of the shell, the plug is located between the deformation module and the water outlet, when the temperature of water in the water through groove is lower than a preset temperature T, the thickness of the deformation module in the radial direction of the through hole is L1, and the plug is in a state of opening the water outlet; when the water temperature in the water passing groove reaches above a preset temperature T, the thickness of the deformation module along the radial direction of the through hole is increased to be L2, so that the plug is extruded to move along the through hole and block the water outlet.

Optionally, the deformation module includes:

the thickness of the middle part of the gasket is greater than or less than the thickness of the peripheral side along the radial direction of the through hole;

the double-metal piece is arranged on each of two sides of the gasket and comprises a first metal sheet and a second metal sheet which are attached to each other, the second metal sheet is close to the gasket, and the thermal expansion coefficient of the second metal sheet is larger than that of the first metal sheet;

when the water temperature in the water passing tank is lower than a preset temperature T, the middle parts of the two bimetal pieces bend towards the mutually approaching direction and are attached to the middle part of the gasket; when the water temperature in the water passing tank reaches above a preset temperature T, the middle parts of the two bimetal parts bend towards the direction away from each other and are separated from the middle part of the gasket.

Optionally, the deformation module comprises:

the peripheral side to the middle part of the gasket are bent along the radial direction of the through hole;

the bimetal piece is arranged on one side of the concave surface of the gasket and comprises a first metal sheet and a second metal sheet which are mutually attached, the second metal sheet is close to the gasket, and the thermal expansion coefficient of the second metal sheet is greater than that of the first metal sheet;

when the temperature of water in the water passing tank is lower than a preset temperature T, the middle part of the bimetal bends towards the direction close to the middle part of the gasket and is attached to the middle part of the gasket; when the water temperature in the water passing groove reaches above a preset temperature T, the middle part of the bimetal bends towards the direction far away from the middle part of the gasket and is separated from the middle part of the gasket.

Optionally, the deformation module is provided in plurality.

Optionally, the temperature control stop valve further comprises a sliding block, the sliding block is arranged in the through hole and can slide relative to the through hole, and the sliding block is arranged between the deformation module and the plug and connected with the plug.

Optionally, the water outlet device further comprises an elastic resetting piece, one end of the elastic resetting piece is connected with one end, close to the cold water inlet, of the shell, the other end of the elastic resetting piece is connected with the sliding block, and when the temperature of water in the water through groove is lower than a preset temperature T, the plug resets under the elastic force of the elastic resetting piece and opens the water outlet.

Optionally, the temperature control stop valve includes an adjusting screw, the adjusting screw is disposed in the through hole and located at an end of the deformation module far away from the cold water inlet, and the adjusting screw is in threaded connection with the inner wall of the through hole.

Optionally, the temperature-control stop valve further comprises a first sealing ring, and the first sealing ring is arranged between the screw rod and the inner wall of the through hole and used for sealing a gap between the screw rod and the through hole.

Optionally, the temperature-control stop valve further comprises a second sealing ring, and the second sealing ring is arranged between one end of the housing close to the cold water inlet and the inner wall of the valve cavity and used for sealing a gap between one end of the housing close to the cold water inlet and the inner wall of the valve cavity.

Optionally, the temperature control stop valve further comprises a third sealing ring, and the third sealing ring is arranged between one end of the casing far away from the cold water inlet and the inner wall of the valve cavity and used for sealing a gap between one end of the casing far away from the cold water inlet and the inner wall of the valve cavity.

Optionally, one end of the housing, which is far away from the cold water inlet, is in threaded connection with the inner wall of the valve cavity, and one end of the housing, which is close to the cold water inlet, is abutted against the inner wall of the valve cavity.

Optionally, the hot water inlet and the hot water outlet are located on the same line and are arranged perpendicular to the housing, and the cold water inlet and the cold water outlet are located on the same line and are arranged perpendicular to the housing.

Optionally, the temperature control stop valve further comprises a check valve core, and the check valve core is arranged in the valve cavity and is positioned on one side of the temperature control stop valve close to the cold water inlet.

Optionally, the valve body include first valve body and with the second valve body that the connection can be dismantled to first valve body, hot water entry and hot water export all sets up on the first valve body, cold water entry and cold water export all sets up on the second valve body, keeping away from of control by temperature change stop valve the one end of second valve body with the inner wall butt of first valve body, control by temperature change stop valve is close to the one end of second valve body with the second valve body butt.

Optionally, the housing includes a first housing and a second housing connected to the first housing, one end of the first housing far away from the second housing abuts against an inner wall of the first valve body, one end of the second housing far away from the first housing abuts against the second valve body, and the water passage groove is formed in a side wall of the first housing.

Optionally, the valve further comprises a first sealing member and a second sealing member, the first sealing member is arranged between the second housing and the inner wall of the valve chamber and used for sealing a gap between the second housing and the inner wall of the valve chamber, and the second sealing member is arranged between the first valve body and the second valve body and used for sealing a gap between the first valve body and the second valve body.

The utility model discloses another aspect provides a water heater, including foretell temperature-sensing valve, the temperature-sensing valve is installed in the circulation water route of water heater, the hot water export communicates with the hot water interface of water consumption point, cold water export with the cold water interface intercommunication of water consumption point.

Optionally, the circulation waterway comprises:

the main water way is arranged in a water heater body of the water heater;

one end of the water return waterway is communicated with a water supply pipeline outside the water heater and the water inlet end of the main waterway, and the other end of the water return waterway is communicated with the cold water inlet;

and one end of the hot water waterway is communicated with the water outlet end of the main waterway, and the other end of the hot water waterway is communicated with the hot water inlet.

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

the utility model provides a temperature-sensing valve installs in the circulation water route of water heater to be located the water consumption department, temperature-sensing valve includes valve body and temperature control stop valve. The valve body is internally provided with a valve cavity, the first part of the valve body is provided with a hot water inlet and a hot water outlet which are communicated with the valve cavity, the hot water inlet is communicated with the hot water outlet, the second part of the valve body is provided with a cold water inlet and a cold water outlet which are communicated with the valve cavity, and the cold water inlet is communicated with the cold water outlet. The temperature control stop valve is detachably arranged in the valve cavity and used for controlling the on-off of the hot water inlet and the cold water inlet, and when the temperature of water in the valve cavity is lower than a preset temperature T, the temperature control stop valve opens the communication between the hot water inlet and the cold water inlet; when the water temperature in the valve cavity reaches above the preset temperature T, the temperature control stop valve closes the communication between the hot water inlet and the cold water inlet. Specifically, when the water heater is in the preheating process, if hot water in a circulating water path of the water heater reaches a preset temperature T and flows to a water using point, the temperature control stop valve closes communication between the hot water inlet and the cold water inlet, and then the preheating program is ended, so that the hot water is prevented from continuously flowing to a water return water path of the circulating water path, and the energy consumption of the water heater is reduced.

Drawings

Fig. 1 is a schematic perspective view of a temperature control valve according to a first embodiment of the present invention;

fig. 2 is a sectional view of a thermostatic valve according to a first embodiment of the present invention (when the plug opens the water outlet);

fig. 3 is a sectional view of a valve body of a temperature control valve according to a first embodiment of the present invention;

fig. 4 is a sectional view of a thermostatic stop valve according to a first embodiment of the present invention;

fig. 5 is an exploded view of a thermostatic shutoff valve of a thermostatic valve according to an embodiment of the present invention;

fig. 6 is a sectional view of a housing of a thermostatic stop valve according to a first embodiment of the present invention;

fig. 7 is a sectional view of a deformation module of a thermostatic stop valve according to some embodiments of the present invention (when the thickness of the deformation module is L1);

fig. 8 is a sectional view of a deformation module of a thermostatic stop valve according to some embodiments of the present invention (when the thickness of the deformation module is L2);

fig. 9 is a sectional view of a deformation module of a thermostatic stop valve according to another embodiment of the present invention (when the thickness of the deformation module is L1);

fig. 10 is a sectional view of a deformation module of a thermostatic stop valve according to another embodiment of the present invention (when the thickness of the deformation module is L2);

fig. 11 is a sectional view of a deformation module of a thermostatic stop valve according to still other embodiments of the first embodiment of the present invention (when the thickness of the deformation module is L1);

fig. 12 is a sectional view of a deformation module of a thermostatic stop valve according to still other embodiments of the first embodiment of the present invention (when the thickness of the deformation module is L2);

fig. 13 is a cross-sectional view of a thermostatic valve according to a first embodiment of the present invention (when a plug blocks a water outlet);

fig. 14 is a schematic perspective view of a temperature control valve according to a second embodiment of the present invention;

fig. 15 is a sectional view of the temperature control valve according to the second embodiment of the present invention (when the plug opens the water outlet);

fig. 16 is a sectional view of a temperature-controlled stop valve of a temperature-controlled valve according to a second embodiment of the present invention;

fig. 17 is an exploded view of a thermostatic stop valve of a thermostatic valve according to a second embodiment of the present invention;

fig. 18 is a schematic structural diagram of a water heater according to an embodiment of the present invention;

fig. 19 is a step diagram of a water heater according to an embodiment of the present invention.

In the figure:

1. a valve body; 11. a hot water inlet; 12. a hot water outlet; 13. a cold water inlet; 14. a cold water outlet; 15. a valve cavity; 151. a second internal thread;

2. a temperature control stop valve; 21. a housing; 2101. a first housing; 2102. a second housing; 211. a flange step; 212. a first internal thread; 213. a through hole; 214. a water outlet; 215. a second external thread; 216. a water trough; 217. a second groove; 22. adjusting a screw rod; 221. a first internal thread; 222. an adjustment groove; 223. a first groove; 23. a deformation module; 231. a bimetal; 2311. a first metal sheet; 2312. a second metal sheet; 232. a gasket; 24. a slider; 25. a plug; 26. an elastic reset member; 27. a first seal ring; 28. a second seal ring; 29. a third seal ring;

3. a one-way valve core;

4. a water heater body; 41. a main waterway; 410. a water inlet end; 420. a water outlet end;

5. a water pump;

6. a flow meter;

7. a backwater temperature probe;

8. an operation display; 81. a preheat bond;

9. a controller;

101. a first valve body; 102. a second valve body; 103. a screw; 104. a second seal member;

200. water consumption; 201. a cold water port; 202. a hot water interface;

300. a hot water waterway;

400. a water return waterway;

500. a water supply pipeline.

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 one

Referring to fig. 1 to 13, the present invention provides a temperature control valve installed in a circulation water path of a water heater and located at a water consumption point 200, including a valve body 1 and a temperature control stop valve 2. The valve body 1 is internally provided with a valve cavity 15, a hot water inlet 11 and a hot water outlet 12 which are communicated with the valve cavity 15 are arranged on the first part of the valve body 1, the hot water inlet 11 is communicated with the hot water outlet 12, a cold water inlet 13 and a cold water outlet 14 which are communicated with the valve cavity 15 are arranged on the second part of the valve body 1, and the cold water inlet 13 is communicated with the cold water outlet 14. The temperature control stop valve 2 is detachably arranged in the valve cavity 15 and used for controlling the connection and disconnection between the hot water inlet 11 and the cold water inlet 13, and when the temperature of water in the valve cavity 15 is lower than a preset temperature T, the temperature control stop valve 2 opens the connection between the hot water inlet 11 and the cold water inlet 13; when the temperature of the water in the valve cavity 15 reaches a preset temperature T or higher, the temperature control stop valve 2 closes the communication between the hot water inlet 11 and the cold water inlet 13. Specifically, when the water heater is in the preheating process, if the hot water in the circulation water path of the water heater reaches the preset temperature T and flows to the water consumption point 200, the temperature control stop valve 2 closes the communication between the hot water inlet 11 and the cold water inlet 13, and then the preheating process is ended, so that the hot water is prevented from continuously flowing to the return water path 400 of the circulation water path, and the energy consumption of the water heater is reduced.

It should be noted that the temperature control valve in this embodiment may be preferably applied to a water heater using a tap water pipe as the return water path 400, so as to avoid the problem that when the return water path 400 is filled with hot water and a user opens the cold water mode of the water consumption point 200, hot water flows out from the water consumption point 200, which may cause damage to household appliances such as a washing machine and a water purifier at home of the user.

Optionally, the temperature-controlled stop valve 2 comprises a housing 21, a plug 25 and a deformation module 23. The shell 21 is internally provided with a through hole 213, the side wall of the shell 21 is provided with a water trough 216, water in the valve cavity 15 can flow into the through hole 213 through the water trough 216, one end of the shell 21 close to the cold water inlet 13 is provided with a water outlet 214, and the shell 21 is arranged in the valve cavity 15 and is detachably connected with the inner wall of the valve cavity 15. Plug 25 is disposed within through hole 213, and the diameter of plug 25 is greater than the diameter of outlet 214. The deformation module 23 is arranged in the through hole 213, one end of the deformation module 23 abuts against one end of the shell 21 far away from the cold water inlet 13, the plug 25 is located between the deformation module 23 and the water outlet 214, when the temperature of water in the water trough 216 is lower than the preset temperature T, the thickness of the deformation module 23 along the radial direction of the through hole 213 is L1, the plug 25 is in a state of opening the water outlet 214, and at this time, water can flow along the direction indicated by the arrow B in fig. 2 and the arrow a in fig. 6; when the temperature of the water in the water trough 216 reaches above the preset temperature T, the thickness of the deformation module 23 in the radial direction of the through hole 213 is increased to L2, so as to extrude the plug 25 to move along the through hole 213 and block the water outlet 214, thereby realizing the control of the on-off between the hot water inlet 11 and the cold water inlet 13.

Alternatively, as shown in fig. 7 and 8, in some embodiments, the deformation module 23 includes a washer 232 and a bimetal 231. The spacer 232 has a thickness in the middle portion of the spacer 232 smaller than the thickness of the peripheral side in the radial direction of the through hole 213. The bimetal 231 is arranged on two sides of the gasket 232, the bimetal 231 comprises a first metal sheet 2311 and a second metal sheet 2312 which are attached to each other, the second metal sheet 2312 is arranged close to the gasket 232, and the thermal expansion coefficient of the second metal sheet 2312 is larger than that of the first metal sheet 2311. When the temperature of the water in the water trough 216 is lower than the preset temperature T, the middle parts of the two bimetal 231 bend towards the direction of approaching each other and are attached to the middle part of the gasket 232, and the maximum distance between the two bimetal 231 along the radial direction of the through hole 213 is L1 at this time; when the temperature of the water in the water trough 216 reaches a preset temperature T or above, the middle portions of the two bimetal 231 are bent in the direction away from each other and separated from the middle portion of the gasket 232, and at this time, the maximum distance between the two bimetal 231 is L2, so that the opening and closing states of the water outlet 214 are controlled by the temperature. The spacer 232 can support the two bimetal 231.

Alternatively, as shown in fig. 9 and 10, in other embodiments, the thickness of the middle portion of the gasket 232 may be greater than the thickness of the peripheral side, and may also serve as a support for the two bimetal 231.

In still other embodiments, as shown in fig. 11 and 12, the deformation module 23 may optionally include a washer 232 and a bimetal. The gasket 232 is curved in the radial direction of the through hole 213 from the peripheral side to the middle. The bimetal 231 is disposed on one side of the concave surface of the pad 232, the bimetal 231 includes a first metal sheet 2311 and a second metal sheet 2312 which are attached to each other, the second metal sheet 2312 is disposed close to the pad 232, and the thermal expansion coefficient of the second metal sheet 2312 is greater than that of the first metal sheet 2321. When the water temperature in the water tank 216 is lower than the preset temperature T, the middle part of the bimetal 231 bends towards the direction close to the middle part of the gasket 232 and is attached to the middle part of the gasket 232, and the maximum distance between the bimetal 231 and the gasket 232 along the radial direction of the through hole 213 is L1; when the temperature of the water in the water trough 216 reaches the preset temperature T or higher, the middle part of the bimetal 231 bends toward the direction away from the middle part of the gasket 232 and separates from the middle part of the gasket 232, and the maximum distance between the bimetal 231 and the gasket 232 is L2 at this time, so that the opening and closing states of the water outlet 214 are controlled by the temperature.

Optionally, the deformation module 23 is provided in plurality, so that the moving distance of the plug 25 in the through hole 213 can reach a preset length, and sufficient thrust is generated to the plug 25, so that the plug 25 can stably block the water outlet 214, and water is prevented from leaking from a gap between the water outlet 214 and the plug 25.

Optionally, one end of the housing 21, which is far away from the cold water inlet 13, is further provided with a flange step 211, and when the temperature control stop valve 2 is installed in place in the valve cavity 15, a step surface of the flange step 211 abuts against one end of the valve body 1, which is far away from the cold water inlet 13, so that a positioning effect on the temperature control stop valve 2 is achieved in the process of installing the temperature control stop valve 2 into the valve cavity 15.

Optionally, temperature control stop valve 2 still includes slider 24, and slider 24 sets up in through-hole 213 and can slide relative to through-hole 213, and slider 24 sets up between deformation module 23 and end cap 25 and is connected with end cap 25, and slider 24 plays the guide effect to make end cap 25 can follow the radial slip of through-hole 213 all the time under the promotion of deformation module 23, thereby guarantee temperature control stop valve 2's stability.

Optionally, the diameter of the slider 24 is 0.1-1mm smaller than the diameter of the through hole 213. Preferably, in this embodiment, the diameter of the slider 24 is 0.2mm smaller than the diameter of the through hole 213.

Optionally, an elastic reset piece 26 is further included, one end of the elastic reset piece 26 is connected with one end of the housing 21 close to the cold water inlet 13, and the other end is connected with the slider 24, when the temperature of the water in the water trough 216 is lower than the preset temperature T, the plug 25 is reset under the elastic force of the elastic reset piece 26 and opens the water outlet 214. By arranging the elastic resetting piece 26, when the temperature of water in the water passing groove 216 is lower than the preset temperature T, the plug 25 can be automatically reset, so that the water outlet 214 is in an open state, and the water heater can conveniently execute the next round of preheating program.

Optionally, the temperature-control stop valve 2 includes an adjusting screw 22, the adjusting screw 22 is disposed in the through hole 213 and located at an end of the deformation module 23 away from the cold water inlet 13, and the adjusting screw 22 is in threaded connection with an inner wall of the through hole 213.

Specifically, the adjusting screw 22 is provided with a first external thread, and an inner wall of one end of the through hole 213 far away from the cold water inlet 13 is provided with a first internal thread 221 corresponding to the first external thread.

Optionally, an adjusting groove 222 is further provided at an end of the adjusting screw 22 away from the cold water inlet 13, so that an operator can adjust the position of the adjusting screw 22 relative to the through hole 213 by using a tool such as a screwdriver.

Optionally, the temperature-control stop valve 2 further includes a first sealing ring 27, and the first sealing ring 27 is disposed between the screw and the inner wall of the through hole 213 and is used for sealing a gap between the screw and the through hole 213 and preventing water from overflowing from the gap between the screw and the through hole 213.

Optionally, a first groove 223 is further formed on the screw, and the first sealing ring 27 is sleeved in the first groove 223 and protrudes out of the outer side surface of the screw.

Optionally, the temperature-control stop valve 2 further comprises a second sealing ring 28, and the second sealing ring 28 is arranged between one end of the casing 21 close to the cold water inlet 13 and the inner wall of the valve cavity 15 and is used for sealing a gap between one end of the casing 21 close to the cold water inlet 13 and the inner wall of the valve cavity 15 and preventing water from overflowing from the gap between one end of the casing 21 close to the cold water inlet 13 and the inner wall of the valve cavity 15.

Specifically, a second groove 217 is formed in an outer side of one end of the housing 21 close to the cold water inlet 13, and the second sealing ring 28 is sleeved in the second groove 217 and protrudes out of an outer side surface of the housing 21.

Optionally, the temperature-control stop valve 2 further comprises a third sealing ring 29, and the third sealing ring 29 is arranged between one end of the casing 21 far away from the cold water inlet 13 and the inner wall of the valve cavity 15 and is used for sealing a gap between one end of the casing 21 far away from the cold water inlet 13 and the inner wall of the valve cavity 15 and preventing water from overflowing from the gap between one end of the casing 21 far away from the cold water inlet 13 and the inner wall of the valve cavity 15.

Optionally, one end of the housing 21 far away from the cold water inlet 13 is in threaded connection with the inner wall of the valve cavity 15, and one end of the housing 21 close to the cold water inlet 13 is in abutment with the inner wall of the valve cavity 15.

Specifically, one end of the housing 21 remote from the cold water inlet 13 is provided with a second external thread 215, and the inner wall of the valve chamber 15 remote from the cold water inlet 13 is provided with a second internal thread 151 corresponding to the second external thread 215.

Alternatively, the hot water inlet 11 and the hot water outlet 12 are positioned on the same line and are disposed perpendicular to the housing 21, so that when the water outlet 214 is blocked by the plug 25, hot water can smoothly flow to the hot water outlet 12 through the hot water inlet 11 in the direction indicated by the arrow C in fig. 11. The cold water inlet 13 is aligned with the cold water outlet 14 and is disposed perpendicular to the housing 21 so that when the water outlet 214 is blocked by the plug 25, cold water can smoothly flow to the cold water outlet 14 through the cold water inlet 13 in a direction indicated by an arrow D in fig. 11.

Optionally, a one-way valve core 3 is further included, and the one-way valve core 3 is arranged in the valve cavity 15 and is positioned on one side of the temperature control stop valve 2 close to the cold water inlet 13. Specifically, the check valve 3 is in communication connection with the controller 9 of the water heater, so that the water heater controls the check valve 3 to open or close the water outlet 214 through program setting. This is prior art and will not be described herein.

Example two

Referring to fig. 14-17, the difference between the second embodiment and the first embodiment is: the valve body 1 comprises a first valve body 101 and a second valve body 102 detachably connected with the first valve body 101, a hot water inlet 11 and a hot water outlet 12 are arranged on the first valve body 101, a cold water inlet 13 and a cold water outlet 14 are arranged on the second valve body 102, one end of the temperature control stop valve 2, which is far away from the second valve body 102, is abutted to the inner wall of the first valve body 102, and one end of the temperature control stop valve 2, which is close to the second valve body 102, is abutted to the second valve body 102. In this embodiment, the adjustment screw 22 is mainly eliminated, and in the first embodiment, in order to ensure that water seeps out from the gap between the adjustment screw 22 and the through hole 213, a plurality of first sealing rings 27 are required to be provided, so that the water seepage prevention effect can be effectively achieved. In the second embodiment, the water leakage problem caused by the adjustment screw 22 is completely solved by eliminating the adjustment screw 22. Correspondingly, in order to facilitate the installation of the temperature control stop valve 2 and the check valve core 3 in the valve cavity 15, the valve body 1 is arranged to be a detachable structure in the embodiment, namely, the valve body 1 comprises a first valve body 101 and a second valve body 102 detachably connected with the first valve body 101, when the temperature control stop valve 2 and the check valve core 3 are required to be installed in the valve cavity 15, the first valve body 101 and the second valve body 102 are firstly detached, then the temperature control stop valve 2 and the check valve core 3 are sequentially installed in the valve cavity 15, then the first valve body 101 and the second valve body 102 are assembled together, and therefore the installation of the temperature control valve is completed.

Alternatively, in this embodiment, the first valve body 101 and the second valve body 102 are detachably connected by a screw 103.

Alternatively, the housing 21 includes a first housing 2101 and a second housing 2102 connected to the first housing 2101, one end of the first housing 2101 distant from the second housing 2102 abuts on an inner wall of the first valve body 101, one end of the second housing 2102 distant from the first housing 2101 abuts on the second valve body 102, and the water passage groove 216 is opened in a side wall of the first housing 2101. By arranging the casing 21 to be a detachable structure, that is, the casing 21 comprises the first casing 2101 and the second casing 2102 connected with the first casing 2101, when the deformation module 23, the slider 24 and the plug 25 need to be installed in the through hole 213, the first casing 2101 and the second casing 2102 are detached first, then the deformation module 23, the slider 24 and the plug 25 are sequentially installed in the through hole 213, and then the first casing 2101 and the second casing 2102 are assembled together, so that the installation of the temperature control stop valve 2 is completed.

Optionally, a first sealing member 21032103 and a second sealing member 104 are further included, the first sealing member 21032103 is disposed between the second housing 2102 and the inner wall of the valve chamber 15 for sealing a gap between the second housing 2102 and the inner wall of the valve chamber 15, and the second sealing member 104 is disposed between the first valve body 101 and the second valve body 102 for sealing a gap between the first valve body 101 and the second valve body 102. In this embodiment, only one sealing member needs to be disposed between the second housing 2102 and the inner wall of the valve chamber 15, and between the first valve body 101 and the second valve body 102, respectively, to achieve the overall sealing effect of the thermo-valve.

Optionally, the hot water inlet 11 and the hot water outlet 12 are arranged vertically, and the cold water inlet 13 and the cold water outlet 14 are arranged vertically, so as to facilitate the installation of the temperature-controlled stop valve 2 and the check valve core 3 in the valve cavity 15.

Referring to fig. 1 to 18, another aspect of the present invention provides a water heater including the above temperature control valve, the temperature control valve is installed in a circulation water path of the water heater, the hot water outlet 12 is communicated with a hot water interface 202 of a water consumption point 200, and the cold water outlet 14 is communicated with a cold water interface 201 of the water consumption point 200.

Optionally, the circulation waterway includes a main waterway 41, a return waterway 400, and a hot water waterway 300. The main water passage 41 is provided in the boiler body 4 of the boiler. One end of the return water path 400 is communicated with a water supply line 500 outside the water heater and a water inlet end 410 of the main water path 41, and the other end is communicated with the cold water inlet 13. One end of the hot water path 300 is communicated with the water outlet end 420 of the main water path 41, and the other end is communicated with the hot water inlet 11.

Optionally, the water heater further comprises a controller 9, and an operation display 8, a water pump 5 and a flow meter 6 which are in communication connection with the controller 9, wherein the water pump 5 and the flow meter 6 are both installed on the main water path 41, and the controller 9 and the operation display are both installed on the water heater body 4.

Optionally, the water-returning device further comprises a water-returning temperature probe 7 in communication connection with the controller 9, wherein the water-returning temperature probe 7 is installed at the water inlet end 410 of the main water path 41 and is used for detecting the water temperature of the water inlet end 410.

Referring to fig. 18 and 19, another aspect of the present invention provides a method for operating a water heater as described above, including the following steps:

s1: the preheating function of the water heater is started;

s2: starting a water pump 5 of the water heater;

s3: judging whether the actually measured water flow is larger than the starting-up water flow, if so, entering S4;

s4: starting the water heater for ignition, operating in a preheating mode, and detecting the circulating flow of the water heater in real time by using a flowmeter 6 of the water heater;

s4: judging whether a first preheating condition of the water heater is met, if so, turning off the water pump 5 and exiting the preheating program, otherwise, entering S5;

s5: and judging whether a second preheating condition of the water heater is met, if so, closing the water pump 5 and exiting the preheating program, and if not, returning to S4.

By setting the judgment of the double preheating conditions, the conclusion whether the water pump 5 is turned off and the preheating program is exited is obtained, and the stability of the preheating program of the water heater in the operation process is ensured.

Optionally, the first preheat condition is measured water flow < startup water flow. Specifically, when the measured water flow is less than the starting-up water flow, it is indicated that the water amount in the circulating water path of the water heater is reduced, that is, the temperature control valve temperature control stop valve 2 is closed at this time, that is, it is indicated that the hot water reaching the preset temperature T reaches the water consumption point 200 at this time, the operation of the preheating program is completed, and at this time, the water pump 5 may be closed and the preheating program may be exited.

Alternatively, in S4 and S5, the boiler switches to the bathing standby mode after turning off the water pump 5 and exiting the preheating process.

Alternatively, when the water heater is in the bath standby mode, the user can turn on or off the warm-up function by a warm-up key 81 provided on the operation display 8.

Optionally, in S3, if the measured water flow is less than or equal to the startup water flow, a fault alarm is issued to notify a user that a problem occurs in the water heater.

Optionally, the second preheating condition may be that the return water temperature reaches the target preheating temperature, the outlet water temperature is protected from being over-heated, or the preheating time reaches the programmed maximum preheating time, and the like, which is not limited herein.

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 (19)

1. A thermostatic valve installed in a circulation water path of a water heater at a water consumption point (200), comprising:

the valve comprises a valve body (1), wherein a valve cavity (15) is arranged in the valve body (1), a hot water inlet (11) and a hot water outlet (12) which are communicated with the valve cavity (15) are formed in the first part of the valve body (1), the hot water inlet (11) is communicated with the hot water outlet (12), a cold water inlet (13) and a cold water outlet (14) which are communicated with the valve cavity (15) are formed in the second part of the valve body (1), and the cold water inlet (13) is communicated with the cold water outlet (14);

the temperature control stop valve (2) is detachably arranged in the valve cavity (15) and is used for controlling the connection and disconnection between the hot water inlet (11) and the cold water inlet (13), and when the temperature of water in the valve cavity (15) is lower than a preset temperature T, the temperature control stop valve (2) opens the communication between the hot water inlet (11) and the cold water inlet (13); when the water temperature in the valve cavity (15) reaches a preset temperature T, the temperature control stop valve (2) closes the communication between the hot water inlet (11) and the cold water inlet (13).

2. Temperature-controlled valve according to claim 1, characterized in that the temperature-controlled shut-off valve (2) comprises:

a through hole (213) is formed in the shell (21), a water passing groove (216) is formed in the side wall of the shell (21), water in the valve cavity (15) can flow into the through hole (213) through the water passing groove (216), a water outlet (214) is formed in one end, close to the cold water inlet (13), of the shell (21), and the shell (21) is installed in the valve cavity (15) and detachably connected with the inner wall of the valve cavity (15);

the plug (25) is arranged in the through hole (213), and the diameter of the plug (25) is larger than that of the water outlet (214);

the deformation module (23) is arranged in the through hole (213), one end of the deformation module (23) is abutted to one end, far away from the cold water inlet (13), of the shell (21), the plug (25) is located between the deformation module (23) and the water outlet (214), when the temperature of water in the water through groove (216) is lower than a preset temperature T, the thickness of the deformation module (23) along the radial direction of the through hole (213) is L1, and the plug (25) is in a state of opening the water outlet (214); when the water temperature in the water passing groove (216) reaches above a preset temperature T, the thickness of the deformation module (23) along the radial direction of the through hole (213) is increased to L2, so that the plug (25) is extruded to move along the through hole (213) and block the water outlet (214).

3. Thermostatted valve as claimed in claim 2, characterized in that the deformation module (23) comprises:

a spacer (232) having a thickness in a middle portion of the spacer (232) in a radial direction of the through hole (213) larger or smaller than a thickness of a peripheral side;

the gasket comprises a bimetal (231), wherein the bimetal (231) is arranged on two sides of the gasket (232), the bimetal (231) comprises a first metal sheet (2311) and a second metal sheet (2312) which are attached to each other, the second metal sheet (2312) is arranged close to the gasket (232), and the thermal expansion coefficient of the second metal sheet (2312) is greater than that of the first metal sheet (2311);

when the water temperature in the water trough (216) is lower than a preset temperature T, the middle parts of the two bimetal pieces (231) bend towards the mutually approaching direction and are attached to the middle part of the gasket (232); when the temperature of the water in the water passing groove (216) reaches a preset temperature T or higher, the middle parts of the two bimetal pieces (231) bend in the directions away from each other and are separated from the middle part of the gasket (232).

4. Thermostatted valve as claimed in claim 2, characterized in that the deformation module (23) comprises:

a gasket (232), wherein the peripheral side to the middle of the gasket (232) are bent along the radial direction of the through hole (213);

the bimetal (231) is arranged on one side of the concave surface of the gasket (232), the bimetal (231) comprises a first metal sheet (2311) and a second metal sheet (2312) which are attached to each other, the second metal sheet (2312) is arranged close to the gasket (232), and the thermal expansion coefficient of the second metal sheet (2312) is larger than that of the first metal sheet (2311);

when the temperature of water in the water passing tank (216) is lower than a preset temperature T, the middle part of the bimetal (231) bends towards the direction close to the middle part of the gasket (232) and is attached to the middle part of the gasket (232); when the temperature of the water in the water passing groove (216) reaches a preset temperature T or higher, the middle part of the bimetal (231) bends towards a direction far away from the middle part of the gasket (232) and is separated from the middle part of the gasket (232).

5. Thermostatted valve as claimed in claim 3, characterized in that the deformation module (23) is provided in plurality.

6. Thermostatted valve as claimed in claim 2, characterized in that the thermostatted stop valve (2) also comprises a slider (24), the slider (24) being arranged in the through hole (213) and being able to slide relative to the through hole (213), the slider (24) being arranged between the deformation module (23) and the stopper (25) and being connected to the stopper (25).

7. Thermostatted valve as claimed in claim 6, characterized in that it also comprises an elastic return element (26), the elastic return element (26) being connected at one end to the housing (21) close to the cold water inlet (13) and at the other end to the slider (24), the plug (25) returning under the force of the elastic return element (26) and opening the water outlet (214) when the temperature of the water in the trough (216) is lower than a preset temperature T.

8. Thermostatic valve according to any of claims 2 to 7, characterized in that the thermostatic shut-off valve (2) further comprises an adjusting screw (22), the adjusting screw (22) being arranged in the through hole (213) at an end of the deformation module (23) remote from the cold water inlet (13), the adjusting screw (22) being in threaded connection with an inner wall of the through hole (213).

9. Thermostatted valve as claimed in claim 8, characterized in that the thermostatted stop valve (2) also comprises a first sealing ring (27), the first sealing ring (27) being arranged between the adjusting screw (22) and the inner wall of the through bore (213) for sealing the gap between the adjusting screw (22) and the through bore (213).

10. Thermostatted valve as claimed in one of claims 2 to 7, characterized in that the thermostatted stop valve (2) also comprises a second sealing ring (28), the second sealing ring (28) being arranged between the end of the housing (21) close to the cold water inlet (13) and the inner wall of the valve chamber (15) for sealing the gap between the end of the housing (21) close to the cold water inlet (13) and the inner wall of the valve chamber (15).

11. Thermostatted valve as claimed in claim 10, characterized in that the thermostatted stop valve (2) also comprises a third sealing ring (29), the third sealing ring (29) being arranged between the end of the housing (21) remote from the cold water inlet (13) and the inner wall of the valve chamber (15) for sealing the gap between the end of the housing (21) remote from the cold water inlet (13) and the inner wall of the valve chamber (15).

12. Thermostatted valve as claimed in one of claims 2 to 7, characterized in that the end of the housing (21) remote from the cold water inlet (13) is screwed to the inner wall of the valve chamber (15), the end of the housing (21) close to the cold water inlet (13) abutting the inner wall of the valve chamber (15).

13. Thermostatted valve as claimed in one of claims 2 to 7, characterized in that the hot water inlet (11) is aligned with the hot water outlet (12) and is arranged perpendicularly to the housing (21), and the cold water inlet (13) is aligned with the cold water outlet (14) and is arranged perpendicularly to the housing (21).

14. Thermostatic valve according to any of claims 2-7, characterized by further comprising a one-way valve spool (3), wherein the one-way valve spool (3) is arranged in the valve chamber (15) and is located on the side of the thermostatic stop valve (2) close to the cold water inlet (13).

15. Thermostatted valve as claimed in one of claims 2 to 7, characterized in that the valve body (1) comprises a first valve body (101) and a second valve body (102) which is detachably connected to the first valve body (101), the hot water inlet (11) and the hot water outlet (12) being arranged on the first valve body (101), the cold water inlet (13) and the cold water outlet (14) being arranged on the second valve body (102), the end of the thermostatic stop valve (2) remote from the second valve body (102) abutting against the inner wall of the first valve body (101), and the end of the thermostatic stop valve (2) close to the second valve body (102) abutting against the second valve body (102).

16. The thermostated valve as claimed in claim 15, characterized in that the housing (21) comprises a first housing (2101) and a second housing (2102) connected to the first housing (2101), the end of the first housing (2101) remote from the second housing (2102) abutting against the inner wall of the first valve body (101), the end of the second housing (2102) remote from the first housing (2101) abutting against the second valve body (102), the water passage channel (216) opening onto the side wall of the first housing (2101).

17. The temperature control valve according to claim 16, further comprising a first sealing member (2103) and a second sealing member (104), the first sealing member (2103) being disposed between the second housing (2102) and an inner wall of the valve chamber (15) for sealing a gap between the second housing (2102) and the inner wall of the valve chamber (15), the second sealing member (104) being disposed between the first valve body (101) and the second valve body (102) for sealing a gap between the first valve body (101) and the second valve body (102).

18. A water heater comprising a thermostatic valve according to any of claims 1 to 17, mounted in a circuit of the water heater, the hot water outlet (12) communicating with a hot water port (202) of a water consumption point (200) (200), the cold water outlet (14) communicating with a cold water port (201) of the water consumption point (200) (200).

19. The water heater of claim 18, wherein the circulating water circuit comprises:

a main water path (41) provided in a water heater body (4) of the water heater;

a water return waterway (400), one end of which is communicated with a water supply pipeline (500) outside the water heater and a water inlet end (410) of the main waterway (41), and the other end of which is communicated with the cold water inlet (13);

and a hot water path (300) having one end communicating with the water outlet end (420) of the main water path (41) and the other end communicating with the hot water inlet (11).

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