CN215522069U

CN215522069U - Anti-freezing valve and water heater applying same

Info

Publication number: CN215522069U
Application number: CN202121477162.6U
Authority: CN
Inventors: 沈文权
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-01-14
Anticipated expiration: 2031-06-30

Abstract

The utility model relates to an anti-freezing valve and a water heater applying the same, wherein the anti-freezing valve comprises a valve body with an accommodating cavity and a valve core movably arranged in the accommodating cavity, and is characterized in that: the valve core is limited on an anti-freezing mechanism, and the anti-freezing mechanism can drive the valve core to be switched from a normal state to an off state when the ambient temperature is lower than the preset temperature, and compared with the prior art, the anti-freezing valve has the advantages that: the valve core is integrated with the anti-freezing mechanism, so that the switching of water inlet and water discharge can be completed even in a power-off state, and the problem of freezing and damage of a heat exchanger is avoided.

Description

Anti-freezing valve and water heater applying same

Technical Field

The utility model relates to a valve for a water heater, in particular to an anti-freezing valve and a water heater applying the anti-freezing valve.

Background

The gas water heater is communicated with the outdoor environment through the smoke exhaust pipe, and cold air easily enters the water heater along the smoke exhaust pipe when the outdoor temperature is lower than zero centigrade in cold winter, so that the weak part of a water path pipeline of the water heater is frozen and cracked, and most of the gas water heaters are additionally provided with the electric heating anti-freezing cracking device, so that a certain anti-freezing function is achieved. The electric heating anti-frost-crack device can normally start to work only when the water heater is in a power-on state, and the situation that the electric heating device cannot be started and a water heater pipeline is frost-cracked due to the fact that some users have the habit of pulling out a power plug of the water heater after using the water heater, or have power failure at home, or a newly-decorated house does not use power failure for a long time and the like can be caused. In order to solve the above problems, for example, in the utility model patent of china with patent number ZL201510398012.9 (publication number CN104976771B), a water inlet pipe, a water outlet pipe, a bypass pipe, a water outlet pipe and a U-shaped pipe are arranged on a valve body, which is communicated with a valve cavity; the other end of the U-shaped pipe is communicated with the water outlet pipe, and the water inlet pipe, the water outlet pipe, the bypass pipe, the water outlet pipe and the communication ports of the U-shaped pipe and the valve cavity are positioned on the same circle; the valve core is provided with a first pipeline and a second pipeline which are communicated with each other; when the first pipeline conducts the water inlet pipe and the water outlet pipe, the second pipeline is closed by the valve body; when the bypass pipe and the U-shaped pipe are communicated by the first pipeline, the second pipeline is communicated with the drain pipe, and the anti-freezing device can realize the conversion of water supply and drainage functions only by rotating the valve core.

In addition, the existing water heater is also provided with an anti-freezing heating rod, so that a user can use the water heater normally, and the anti-freezing heating rod starts to work when the temperature of inlet water is lower than 5 ℃ under the condition of no power failure, so that frost cracking caused by over-low temperature is prevented; however, when the user is out of the door and the power is off, when the temperature is lower than 5 ℃, the anti-freezing heating rod cannot work, the water inlet temperature can be further reduced downwards, and when the temperature is reduced to below zero, the danger of freezing damage can be caused, so that the prior anti-freezing device needs to be further improved.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the present invention is to provide an anti-freezing valve which can avoid the problem of freezing damage of a heat exchanger when a water heater is powered off, in view of the above-mentioned prior art.

The second technical problem to be solved by the present invention is to provide a water heater using the above mentioned frost valve, in view of the above mentioned prior art.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: this frost valve, including the valve body that has the holding chamber and can locate the case of above-mentioned holding intracavity with moving, its characterized in that: the valve spool is restrained on an anti-freeze mechanism that can drive the valve spool to switch from a normal state to an off state when the ambient temperature is below a predetermined temperature.

Further, the valve core is provided with a mounting part for mounting the anti-freezing mechanism, wherein the anti-freezing mechanism comprises:

the lock seat is arranged on the mounting part of the valve core and is provided with a lock seat hole communicated with the accommodating cavity;

the lock tongue is arranged on the lock seat and can stretch out and draw back relative to the inside and the outside of the lock seat;

the first elastic piece is arranged in the lock seat, so that the lock tongue has an outward extending trend;

correspondingly, the mounting part is provided with a through hole communicated with the lock base hole, the valve body is provided with a limiting part corresponding to the extending part of the lock tongue, and the lock tongue is limited under the condition that the first elastic piece drives the lock tongue to extend outwards.

Therefore, the first elastic piece is reduced along with the reduction of the ambient temperature or does not apply elastic force to the lock tongue when the ambient temperature is lower than the preset temperature, the limiting effect of the lock tongue on the valve core is released, the valve core is driven to be switched from the normal state to the off state, and the antifreezing valve can be closed even under the condition of power failure.

Furthermore, the valve core is movably arranged in the accommodating cavity and can move to a first position or a second position, the valve core is provided with a through water passing channel, two ends of the water passing channel are respectively and correspondingly communicated with the water inlet and the water outlet in a fluid mode under the condition that the valve core is at the first position, and two ends of the water passing channel are communicated with the corresponding water outlet and the water outlet under the condition that the valve core is at the second position.

In order to better realize the switching of the valve core from the normal state to the off state, preferably, the anti-freezing mechanism further comprises a second elastic element connected to the mounting portion adjacent to the valve core, and the second elastic element switches the valve core from the normal state to the off state in a state of releasing the limit of the lock tongue on the limit portion of the valve body. Similarly, the second elastic element is reduced along with the reduction of the ambient temperature or does not apply elastic force to the valve core when the ambient temperature is lower than the preset temperature, so that the valve core is driven to be switched from the normal state to the off state by releasing, and the antifreezing valve can be closed even in the power-off condition.

In order to assist the valve core to switch from the normal state to the off state in the power-off state, the valve body is preferably further provided with a third elastic member, and the third elastic member makes the valve core always have the tendency of being kept in the off state.

The first elastic piece and the second elastic piece are both heat-sensitive springs, wherein the elastic force applied by the heat-sensitive springs to the lock tongue or the valve core can be reduced along with the reduction of the ambient temperature or the elastic force is not applied to the lock tongue or the valve core when the ambient temperature is lower than the preset temperature.

In order to solve the second technical problem, the utility model further provides a water heater with the anti-freezing valve, which comprises a casing, and is characterized in that: the valve body is connected to the water inlet connector of the casing.

Compared with the prior art, the utility model has the advantages that: the valve core is integrated with the anti-freezing mechanism, so that the switching of water inlet and water discharge can be completed even in a power-off state, and the problem of freezing and damage of a heat exchanger is avoided.

Drawings

FIG. 1 is a schematic view of a freeze valve according to an embodiment of the present invention;

FIG. 2 is a sectional view of the antifreeze valve in the normal state according to the embodiment of the present invention;

FIG. 3 is a cross-sectional view at another angle from FIG. 2;

FIG. 4 is a sectional view of the antifreeze valve of the embodiment of the present invention in the antifreeze state;

fig. 5 is a cross-sectional view at another angle of fig. 3.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in FIGS. 1 to 5, the preferred embodiment of the present invention is shown. The antifreezing valve of the embodiment comprises a valve body 1 with an accommodating cavity 10 and a valve core 2 movably arranged in the accommodating cavity 10, wherein the valve core 2 is limited on an antifreezing mechanism 3, and the antifreezing mechanism 3 can drive the valve core 2 to switch from a normal state to a closed state when the ambient temperature is lower than a preset temperature. By integrating the anti-freezing mechanism 3 on the valve core 2, the switching of water inlet and water discharge can be completed even in the power-off state, and the problem of freezing and damaging the heat exchanger is avoided.

Specifically, the valve body 2 has an installation portion 21 for installing the anti-freezing mechanism 3, wherein the anti-freezing mechanism 3 includes a lock base 31 disposed on the installation portion 21 of the valve body 2, the lock base 31 has a lock base hole 311 communicated with the accommodation chamber 10, the lock base 31 is further provided with a lock tongue 32 capable of extending inside and outside relative to the lock base 31 and a first elastic member 33 capable of enabling the lock tongue 32 to have an outward extending trend, correspondingly, the installation portion 21 has a through hole 211 communicated with the lock base hole 311, the valve body 1 has a limiting portion 11 corresponding to the outward extending position of the lock tongue 32, and the lock tongue 32 is limited when the first elastic member 33 drives the lock tongue 32 to extend outwards. Therefore, the first elastic member 33 is reduced along with the reduction of the ambient temperature or does not apply elastic force to the latch tongue 32 when the ambient temperature is lower than the preset temperature, the limiting effect of the latch tongue 32 on the valve element 2 is released, so that the valve element 2 is driven to be switched from the normal state to the off state, and the antifreezing valve can be closed even in the power-off condition. In order to better realize the switching of the valve core 2 from the normal state to the off state, the anti-freezing mechanism 3 further comprises a second elastic element 34 connected to the valve core 2 adjacent to the mounting portion 21, the second elastic element 34 enables the valve core 2 to be switched from the normal state to the off state in the state that the limit of the lock releasing tongue 32 on the limit portion 11 of the valve body 1 is released, and the valve core 2 is released to be driven to be switched from the normal state to the off state by the fact that the second elastic element 34 is reduced along with the reduction of the ambient temperature or no elastic force is applied to the valve core 2 when the ambient temperature is lower than a preset temperature, so that the anti-freezing valve can be closed even in the power-off condition. In order to assist the valve core 2 to switch from the normal state to the off state in the power-off state, the valve body 1 is further provided with a third elastic element 4, the third elastic element 4 makes the valve core 2 always have a tendency of being kept in the off state, wherein the third elastic element 4 is a common spring, and the first elastic element 33 and the second elastic element 34 are both heat-sensitive springs, wherein the elastic force exerted by the first elastic element 33 on the valve core 2 by the latch tongue 32 or the second elastic element 34 can be reduced along with the reduction of the ambient temperature, or the elastic force is not exerted on the latch tongue 32 or the valve core 2 when the ambient temperature is lower than a predetermined temperature.

In order to adapt to the valve core 2 movably arranged in the accommodating cavity 10 and capable of moving to the first position or the second position, the valve core 2 is provided with a through water passing channel, two ends of the water passing channel are correspondingly and respectively communicated with the water inlet 12 and the water outlet 14 in a fluid mode under the condition that the valve core 2 is at the first position, namely, the normal state, and two ends of the water passing channel are communicated with the corresponding water outlet 14 and the water outlet 13 under the condition that the valve core 2 is at the second position, namely, the valve core 2 is in a cylindrical shape, one end adjacent to the installation part 21 is an open end 22, the other end far away from the installation part 21 is a closed end 23, the bolt 32 of the anti-freezing mechanism 3 can be installed on the lock seat 31 through the open end 22, in addition, one end of the third elastic piece 4 is connected to the valve body 1, and the other end is connected to the closed end 230 of the valve core 2. In order to adapt to the movement of the valve core 2, the water passing channel of the valve core 2 comprises a first water passing opening 23 which is arranged on the wall of the valve core 2 and can alternatively open or close the water inlet 12 and the water outlet 13, and a second water passing opening 24 and a third water passing opening 25 which are communicated with the water outlet 14.

In summary, the operation of the anti-freeze valve of the present embodiment is as follows (taking the example that the water inlet 12 and the water outlet 13 are arranged side by side, the water inlet 12 is located below the water outlet 13, the water outlet 14 is located at the opposite side of the water inlet 12 and the water outlet 13, and the water outlet 14 and the water outlet 13 are located at the same horizontal direction):

in a normal state (as shown in fig. 2), the valve core 2 is in the first position, the first water passing port 23 is in fluid communication with the water inlet 12, the second water passing port 24 and the water outlet 14 to be in a water inlet state, the first elastic element 33 and the second elastic element 34 are in a normal preset force, so that the lock tongue 32 is positioned on the limiting part 11 extending out of the valve body 1, and the third elastic element 4 is in a compressed state;

when frost cracking is prevented in winter (as shown in fig. 3), when the external temperature is lower than the preset values of the first elastic member 33 and the second elastic member 34, the first elastic member 33 loses the preset force on the latch tongue 32, so that the latch tongue 32 retracts into the latch seat 31 to release the locking effect on the limiting part 11 of the valve body 1, meanwhile, the second elastic member 34 also loses the preset force on the valve element 2, and drives the valve element 2 to move upwards under the combined action of the third elastic member 4, and the normal state is switched to the off state, at this time, the valve element 2 is in the second position, and the first water passing port 23 is in fluid communication with the water outlet 13, the third water passing port 25 and the water outlet 14 to be in the water drainage state.

If the outside temperature is higher than the preset values of the first elastic member 33 and the second elastic member 34, the water heater needs to be restored to the normal state, at this time, the first elastic member 33 and the second elastic member 34 restore the preset forces thereof, the lock tongue 32 is pushed to the limiting portion 11 of the valve body 1 again to be in the outward extension state, the second elastic member 34 pushes the valve core 2 down to the normal state, and the third elastic member 4 is in the compressed state.

Claims

1. The utility model provides an anti-freeze valve, includes valve body (1) that has holding chamber (10) and can locate case (2) in above-mentioned holding chamber (10) with moving, its characterized in that: the valve core (2) is limited on an anti-freezing mechanism (3), and the anti-freezing mechanism (3) can drive the valve core (2) to be switched from a normal state to an off state when the ambient temperature is lower than a preset temperature.

2. The antifreeze valve according to claim 1, wherein: the valve core (2) is provided with a mounting part (21) for mounting the anti-freezing mechanism (3), wherein the anti-freezing mechanism (3) comprises:

the lock seat (31) is arranged on the mounting part (21) of the valve core (2) and is provided with a lock seat hole (311) communicated with the accommodating cavity (10);

the bolt (32) is arranged on the lock seat (31) and can extend and retract inside and outside relative to the lock seat (31);

the first elastic piece (33) is arranged in the lock seat (31) and enables the lock tongue (32) to have an outward extending trend;

correspondingly, the mounting part (21) is provided with a through hole (211) which is communicated with the lock base hole (311), the valve body (1) is provided with a limiting part (11) corresponding to the extending part of the lock tongue (32), and the lock tongue (32) is limited under the state that the first elastic piece (33) drives the lock tongue (32) to extend.

3. The antifreeze valve according to claim 2, wherein: the valve core (2) is movably arranged in the accommodating cavity (10) and can move to a first position or a second position, the valve core (2) is provided with a through water passing channel, two ends of the water passing channel are correspondingly and respectively communicated with the water inlet (12) and the water outlet (14) in a fluid mode under the condition that the valve core (2) is located at the first position, and two ends of the water passing channel are communicated with the corresponding water outlet (14) and the water outlet (13) under the condition that the valve core (2) is located at the second position.

4. The antifreeze valve according to any one of claims 2 to 3, wherein: the anti-freezing mechanism (3) further comprises a second elastic piece (34) connected to the valve core (2) and adjacent to the mounting portion (21), and the valve core (2) is switched to the off state from the normal state by the second elastic piece (34) in the state that the limit of the lock tongue (32) on the limit portion (11) of the valve body (1) is released.

5. The antifreeze valve according to claim 4, wherein: the valve body (1) is further provided with a third elastic piece (4), and the third elastic piece (4) enables the valve core (2) to always have the tendency of being kept in the off state.

6. The antifreeze valve according to claim 5, wherein: the first elastic piece (33) and the second elastic piece (34) are both heat-sensitive springs, wherein the elastic force applied by the heat-sensitive springs to the lock tongue (32) or the valve core (2) can be reduced along with the reduction of the ambient temperature or the elastic force is not applied to the lock tongue (32) or the valve core (2) when the ambient temperature is lower than a preset temperature.

7. A water heater applying the antifreezing valve as defined in any one of claims 1 to 6, comprising a housing, wherein: the valve body (1) is connected to the water inlet connector of the casing.