CN212390613U - Anti-freezing drainage device and water heater system - Google Patents

Abstract

The utility model discloses a drainage device and water heater system prevent frostbite, include: the water heater comprises a communication piece, a water inlet pipe, a water outlet pipe and a water outlet pipe, wherein the communication piece is provided with a drainage channel and can be connected with an external water heater; the temperature adjusting assembly is arranged on the communicating piece and can deform according to temperature change to block or open the drainage channel. Through being provided with the temperature regulation subassembly on the intercommunication piece, the temperature regulation subassembly can produce deformation according to temperature variation, and then can reduce the automatic drainage channel that opens under the condition of threshold value at the temperature, and shutoff drainage channel when the temperature rises to the threshold value, realizes the effect of automatic drainage with this mode, need not user manual operation and need not power supply alright use, be favorable to convenient to use, reduce use cost and improve the reliability.

Description

Anti-freezing drainage device and water heater system

Technical Field

The utility model relates to a water heater field, in particular to drainage device and water heater system prevent frostbite.

Background

Along with the development of science and technology, the gas water heater has the limitations of high energy consumption, low efficiency and waste gas generation, and more water heaters utilizing electric energy for heating appear on the market, wherein the water storage type water heater is widely used due to the advantages of being used at any time, not needing to wait for heating and the like.

However, in a low temperature environment, such as the northern winter, in order to prevent the stored water in the storage water heater from freezing and expanding, which may cause damage to the storage water heater, the storage water heater is generally provided with a drainage device, such as a drainage valve. In the prior art, a user needs to manually and directly operate the drainage device to drain water, the use is inconvenient, and the situation that the user forgets to drain water is easy to occur. Partial water storage formula water heater is provided with temperature sensor and detects ambient temperature, carries out the drainage according to the automatic switching of ambient temperature control drainage device through automatically controlled mode, and this kind of mode needs power supply always can normally work, consumes the electric energy, increases use cost to can not normally work under the circumstances of outage, the reliability is lower.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an antifreeze drainage device, it need not the power supply use alright open the outlet according to ambient temperature is automatic.

The utility model discloses still provide the water heater system, it can be under the low environment of temperature, the water storage of the interior retaining chamber of automatic discharge.

According to the utility model discloses prevent frostbite drainage device and water heater of first aspect embodiment, include: the water heater comprises a communication piece, a water inlet pipe, a water outlet pipe and a water outlet pipe, wherein the communication piece is provided with a drainage channel and can be connected with an external water heater; the temperature adjusting assembly is arranged on the communicating piece and can deform according to temperature change to block or open the drainage channel.

According to the utility model discloses prevent frostbite drainage device and water heater has following beneficial effect at least: through being provided with the temperature regulation subassembly on the intercommunication piece, the temperature regulation subassembly can produce deformation according to temperature variation, and then can reduce the automatic drainage channel that opens under the condition of threshold value at the temperature, and shutoff drainage channel when the temperature rises to the threshold value, realizes the effect of automatic drainage with this mode, need not user manual operation and need not power supply alright use, be favorable to convenient to use, reduce use cost and improve the reliability.

According to some embodiments of the utility model, the intercommunication piece be provided with the intercommunication chamber and with the intake port, the delivery port and the drainage port of intercommunication chamber intercommunication, intake port with between the drainage port perhaps delivery port with form between the drainage port drainage channel.

According to some embodiments of the utility model, the temperature regulation subassembly includes casing, temperature-sensing piece and shutoff piece, the casing with the intercommunication piece is connected, the temperature-sensing piece sets up on the casing, the shutoff piece with the temperature-sensing piece is connected, the intercommunication piece be provided with the opening of intercommunication chamber intercommunication, the shutoff piece passes the opening stretches into in the intercommunication chamber, the temperature-sensing piece can expand or shrink in order to drive according to the temperature the shutoff piece shutoff or open the drainage port.

According to some embodiments of the invention, the blocking piece with the communicating piece forms be provided with at least one sealing member between the internal face in communicating chamber.

According to the utility model discloses a some embodiments, the shutoff piece is provided with the pressure release passageway, the pressure release passageway can communicate the intercommunication chamber and the drainage port, the pressure release passageway is provided with pressure release structure, pressure release structure can be based on the big or small shutoff of water pressure in the intercommunication chamber or open the pressure release passageway.

According to some embodiments of the present invention, the pressure relief structure includes a first elastic member and a blocking member located in the pressure relief passage, the pressure relief passage is provided with a narrowing portion, one end of the first elastic member is connected with the blocking member, the other end of the first elastic member is connected with the blocking member so that the blocking member abuts against the narrowing portion to block the pressure relief passage.

According to some embodiments of the utility model, still including setting up operating device on the casing, operating device with the temperature sensing piece is connected, operating device receives external force to order about and can drive the shutoff piece removes.

According to some embodiments of the utility model, operating device includes second elastic component, pivot and the handle piece of being connected with the pivot, the pivot is rotated and is set up on the casing, the one end of second elastic component with the casing butt and the other end of second elastic component with shutoff piece or temperature sensing piece butt, so that temperature sensing piece with the lateral wall face butt of pivot, be provided with the bellying on the lateral wall face of pivot, the pivot is rotated and is made the bellying promotes temperature sensing piece.

According to some embodiments of the present invention, a detachable connecting structure is provided between the communicating member and the housing, and the communicating member is detachably connected to the housing through the detachable connecting structure; the detachable connecting structure comprises an insertion piece and a groove arranged on the shell, an insertion hole and a limiting hole are formed in the wall surface of the shell forming the groove, an insertion channel is formed in the communication piece 100, the communication piece can extend into the groove, and the insertion piece penetrates through the insertion hole and the insertion channel and extends into the limiting hole to limit the communication piece to be separated from the groove; the shell is provided with a limiting block capable of limiting the insertion piece to be separated from the limiting hole.

According to the utility model discloses second aspect embodiment water heater system, including foretell drainage device and the water heater body of preventing frostbite, the water heater body be provided with the water storage chamber and with the water route pipeline of water storage chamber intercommunication, the intercommunication piece with water route pipeline intercommunication.

According to the utility model discloses water heater system has following beneficial effect at least: the intercommunication piece passes through water pipeline and retaining chamber intercommunication, when ambient temperature descends to the threshold value, temperature regulation subassembly produces deformation and opens drainage channel, make the water storage in the retaining chamber discharge through drainage channel, avoid the low temperature to lead to the water storage to freeze and damage water heater body or water pipeline, when ambient temperature risees, temperature regulation subassembly produces deformation shutoff drainage channel, realize the function according to the automatic drainage of ambient temperature with this mode, need not user manual operation, it is more convenient to make the use, also need not outside power supply, use more energy-conservation, high reliability.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of one embodiment of the present invention;

fig. 2 is an exploded perspective view of one embodiment of the present invention;

FIG. 3 is a sectional view of a drainage channel in a blocked state according to one embodiment of the present invention;

FIG. 4 is a cross-sectional view of an open state of a drain passage according to an embodiment of the present invention;

fig. 5 is an enlarged schematic view of a portion a of fig. 2.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in fig. 1 to 4, an anti-freezing drainage device according to an embodiment of the present invention includes: a communication member 100, the communication member 100 being provided with a drainage passage, the communication member 100 being connectable with an external water heater; the temperature adjusting assembly 200 is arranged on the communicating piece 100, and the temperature adjusting assembly 200 can deform according to temperature change so as to seal or open the drainage channel.

Through being provided with temperature regulation subassembly 200 on communicating piece 100, temperature regulation subassembly 200 can produce deformation according to the temperature variation, and then can reduce the automatic drainage channel that opens under the condition of threshold value at the temperature, and shutoff drainage channel when the temperature rises to the threshold value, realizes the effect of automatic drainage with this mode, need not user manual operation and need not the power supply alright use, is favorable to convenient to use, reduces use cost and improves the reliability.

Referring to fig. 1 to 4, in some embodiments of the present invention, the communication member 100 is provided with a communication chamber 110, and a water inlet port 120, a water outlet port 130 and a water outlet port 140 which are communicated with the communication chamber 110, and a water drainage channel is formed between the water inlet port 120 and the water outlet port 140 or between the water outlet port 130 and the water outlet port 140.

The communication piece 100 can be connected with an external water heater, and under the condition that the temperature adjusting assembly 200 blocks the drainage channel, water flow can flow from the water inlet port 120 to the water outlet port 130 and then flows to the external water heater, namely, the communication piece 100 is communicated with a water inlet pipe of the water heater; or the water flow flows out from the water heater, enters the water inlet port 120 and then flows out from the water outlet port 130, namely the communicating piece 100 is communicated with the water outlet pipe of the water heater, and under the two connection modes, when the temperature adjusting assembly 200 opens the drainage channel, the effect of draining the stored water in the water storage cavity of the water heater can be achieved. Through being provided with inlet port 120 and outlet port 130 on the communicating piece 100, communicating piece 100 can conveniently be connected with ordinary water storage formula water heater, need not to set up the outlet specially on the water heater, and the current water heater of adaptation is favorable to improving general purpose, simultaneously, can select inlet tube or the play water piping connection with the water heater according to the needs of installation environment, and the homoenergetic realizes anticipated function, makes and uses more convenient.

Referring to fig. 2 to 4, in some embodiments of the present invention, the temperature adjustment assembly 200 includes a housing 210, a temperature sensing element 220 and a blocking element 230, the housing 210 is connected to the communicating element 100, the temperature sensing element 220 is disposed on the housing 210, the blocking element 230 is connected to the temperature sensing element 220, the communicating element 100 is provided with an opening communicated with the communicating cavity 110, the blocking element 230 passes through the opening and extends into the communicating cavity 110, and the temperature sensing element 220 can expand or contract according to the temperature to drive the blocking element 230 to block or open the drainage port 140.

According to the principle of thermal expansion and cold contraction, the temperature sensing element 220 contracts along with the reduction of temperature, so that the volume is reduced to drive the plugging element 230 to move to open the drainage port 140, drainage is performed, and the water storage in the external water heater is prevented from being frozen and expanded to damage the water heater. Along with the temperature rise, the volume expansion of the temperature sensing element 220 drives the plugging element 230 to move and plug the drainage port 140, and the external water heater can be normally used. The drainage port 140 is plugged or opened in a mode that the temperature sensing element 220 expands with heat and contracts with cold to drive the plugging element 230 to move, and the device is simple in structure and convenient to implement.

The temperature sensing element 220 may be implemented by an object having a large thermal expansion coefficient, such as a conventional wax bulb, or may be implemented by a material having a volume change with temperature change, such as mercury or alcohol. The temperature adjustment assembly 200 may also be an embodiment including a memory alloy, which can be deformed according to a change in temperature, and then the blocking member 230 is driven to block or open the drainage channel when the memory alloy is deformed.

Referring to fig. 2 to 4, in some embodiments of the present invention, at least one sealing member 300 is disposed between the blocking member 230 and the inner wall surface of the communication chamber 110 formed by the communication member 100.

By providing the sealing member 300 between the blocking member 230 and the inner wall surface of the communication chamber 110, when the blocking member 230 blocks the drainage port 140, the sealing member 300 can improve the sealing property, prevent the water flow from leaking from the gap between the blocking member 230 and the inner wall surface of the communication chamber 110, and contribute to improving the reliability. The sealing members 300 may be provided on the inner wall surface of the communication chamber 110, and preferably, two sealing members 300 are provided on the blocking member 230.

Referring to fig. 2 to 4, in some embodiments of the present invention, the blocking member 230 is provided with a pressure relief channel 231, the pressure relief channel 231 can communicate with the communicating cavity 110 and the drainage port 140, the pressure relief channel 231 is provided with a pressure relief structure 240, and the pressure relief structure 240 can block or open the pressure relief channel 231 according to the water pressure in the communicating cavity 110.

Due to the blockage of the pipeline and other reasons, the pipeline of the water heater may have a problem of high water pressure, so that the pipeline is broken or the water heater is damaged. To this end, through being provided with pressure release channel 231 and pressure release structure 240 on shutoff piece 230, when the water pressure in intercommunication chamber 110 was too big, pressure release structure 240 opened pressure release channel 231, made the water in intercommunication chamber 110 can flow to drainage port 140 through pressure release channel 231 and discharge, and then reduced the water pressure in intercommunication chamber 110, avoided the too high pipeline that leads to the fact of water pressure to break or the water heater damages, improved the reliability.

Referring to fig. 2 to 4, in some embodiments of the present invention, the pressure relief structure 240 includes a first elastic member 241 and a blocking member 242 located in the pressure relief channel 231, the pressure relief channel 231 is provided with a narrowing portion 232, one end of the first elastic member 241 is connected with the blocking member 230, and the other end of the first elastic member 241 is connected with the blocking member 242 such that the blocking member 242 blocks the pressure relief channel 231 against the narrowing portion 232.

The pressure relief channel 231 is provided with a narrowing portion 232, so that the aperture of the pressure relief channel 231 at the narrowing portion 232 is reduced, the blocking member 242 abuts against the wall surface of the narrowing portion 232, the blocking member 242 can block the through hole formed by the narrowing portion 232, and further blocks the pressure relief channel 231, and water flow in the communication cavity 110 cannot flow to the drainage port 140 through the pressure relief channel 231. When the water pressure in the communicating chamber 110 is too high, the water pressure forces the blocking member 242 to separate from the narrowing portion 232, at this time, the first elastic member 241 is pressed to be elastically deformed, a gap is left between the blocking member 242 and the narrowing portion 232, so that the pressure relief channel 231 is opened, the water flow in the communicating chamber 110 can flow to the water discharge port 140 through the pressure relief channel 231 to be discharged, and after the water pressure in the communicating chamber 110 is reduced, the first elastic member 241 recovers the elastic deformation, and presses the blocking member 242 against the narrowing portion 232 to block the pressure relief channel 231. Realize the function of automatic pressure release with this mode, be favorable to preventing that intercommunication chamber 110 and the outside pipeline water pressure that communicates with intercommunication chamber 110 are too high, avoid appearing the condition that outside pipeline breaks, the water heater damages, improve the reliability.

Because the temperature sensing element 220 deforms according to the temperature change to drive the plugging element 230 to move, the position of the plugging element 230 does not change under the condition of stable temperature. When the temperature is high, the stopper 230 blocks the drain port 140, and when the water pressure in the communication chamber 110 is normal, the stopper 242 blocks the pressure release passage 231, so that the water flows in from the inlet port 120 and flows out from the outlet port 130.

Under the condition of higher temperature, the blocking piece 230 blocks the drainage port 140, if the water pressure in the communication chamber 110 exceeds a threshold value, the water pressure drives the blocking piece 242 to move to open the pressure relief channel 231, and part of the water in the communication chamber 110 flows to the drainage port 140 through the pressure relief channel, so as to avoid damage caused by excessive pressure of the communication chamber 110 or the waterway pipeline.

Under the condition that the temperature is lower than the threshold value, the temperature sensing element 220 drives the blocking element 230 to open the drainage port 140, at this time, the pressure relief channel 231 does not work, and the water in the communication cavity 110 is discharged through the drainage port 140.

Referring to fig. 1 to 4, in some embodiments of the present invention, the present invention further includes an operating mechanism 400 disposed on the housing 210, the operating mechanism 400 is connected to the temperature sensing element 220, and the operating mechanism 400 is driven by an external force to drive the blocking element 230 to move.

The stored water in the water heater may need to be drained during disassembly, maintenance, etc. Therefore, through the arrangement of the operating mechanism 400, the user can control the plugging piece 230 to move through the operating mechanism 400, and then manually open the drainage channel, so that the drainage function is realized, and the use is more convenient.

Referring to fig. 1 to 4, in some embodiments of the present invention, the operating mechanism 400 includes a second elastic member 410, a rotating shaft 420 and a handle block 430 connected to the rotating shaft 420, the rotating shaft 420 is rotatably disposed on the casing 210, one end of the second elastic member 410 abuts against the casing 210 and the other end of the second elastic member 410 abuts against the blocking member 230 or the temperature sensing member 220, so that the temperature sensing member 220 abuts against a side wall surface of the rotating shaft 420, a protrusion is disposed on the side wall surface of the rotating shaft 420, and the rotating shaft 420 rotates to enable the protrusion to push the temperature sensing member 220.

Through being provided with handle piece 430 and being connected with pivot 420, the user can conveniently drive pivot 420 through operation handle piece 430 and rotate, because temperature sensing piece 220 and the lateral wall face butt of pivot 420, temperature sensing piece 220 and shutoff piece 230 butt simultaneously for pivot 420 rotates when making bellying and temperature sensing piece 220 butt pressure, can promote temperature sensing piece 220 to remove by the bellying, and then orders about shutoff piece 230 to remove and realizes the purpose of shutoff or opening drainage channel. In this way, the use of objects is less, the structure is simple, and the implementation is convenient.

The operating mechanism 400 may further include a screw, the housing 210 is provided with a threaded hole, the screw is in threaded connection with the threaded hole, and the screw abuts against the temperature sensing element 220, so that the user can push the temperature sensing element 220 by rotating the screw, and further move the blocking element 230, thereby achieving the effect of blocking or opening the drainage channel.

Referring to fig. 2 to 4, in some embodiments of the present invention, a detachable connection structure is disposed between the communicating member 100 and the housing 210, and the communicating member 100 is detachably connected to the housing 210 through the detachable connection structure.

Since the communicating member 100 is connected to an external pipe, it is inconvenient to disassemble, and in case of maintenance and cleaning of the communicating chamber 110, the user can conveniently operate the device on the housing 210 by detachably connecting the housing 210 to the communicating member 100, and in case of emergency, the opening allowing the blocking member 230 to pass through can be exposed in this way to perform drainage.

Referring to fig. 2 and 5, in some embodiments of the present invention, the detachable connection structure includes an insertion member 510 and a groove 520 disposed on the housing 210, an insertion hole 521 and a limiting hole 522 are disposed on a wall surface of the housing 210 forming the groove 520, an insertion channel 150 is disposed on the communication member 100, the communication member 100 can extend into the groove 520, and the insertion member 510 passes through the insertion hole 521 and the insertion channel 150 and extends into the limiting hole 522 to limit the communication member 100 from exiting from the groove 520.

The insert 510 passes through the insertion hole 521 and the insertion channel 150 and finally extends into the limiting hole 522, the insert 510 is limited by the insertion hole 521 and the limiting hole 522, so that the insert 510 cannot move in a direction other than a straight line between the insertion hole 521 and the limiting hole 522, and meanwhile, the insert 510 can limit the communication piece 100 from falling out of the groove 520 in the insertion channel 150, so that the shell 210 and the communication piece 100 can be detachably connected. With the structure, the shell 210 is detachably connected with the communicating piece 100 by inserting the insert 510, so that the use of objects is less, the structure is simple, and the implementation and the operation are convenient.

The detachable connection structure may further include a first threaded portion disposed on the housing 210 and a second threaded portion disposed on the communication member 100, and the first threaded portion and the second threaded portion are threadedly connected to achieve the detachable connection between the housing 210 and the communication member 100.

Referring to fig. 2 to 4, in some embodiments of the present invention, a stopper 160 is disposed on the housing 210 to limit the insert 510 from coming out of the limiting hole 522.

The limiting block 160 may be provided with an inclined surface portion, and the inclined surface portion is inclined toward the upper side of the insertion member 510, so that when the limiting block 160 is removed, the inclined surface portion abuts against the inclined surface portion to generate friction force, thereby limiting the removal of the insertion member 510; the stop block 160 may also limit removal of the insert 510 by engaging the insert 510.

Referring to fig. 2, in some embodiments of the present invention, a sealing ring 600 is disposed between the housing 210 and the communicating member 100, so that when the housing 210 is connected to the communicating member 100, a gap can be prevented from existing between the housing 210 and the communicating member, thereby avoiding water leakage and improving reliability.

Referring to fig. 2, in some embodiments of the present invention, the housing 210 may be an embodiment including a base and an upper cover detachably connected to the base to form a cavity for accommodating the rotating shaft 420, the temperature sensing element 220, the blocking element 230 and the second elastic element 410, so that the rotating shaft 420, the temperature sensing element 220, the blocking element 230 and the second elastic element 410 can be protected from being damaged by collision or extrusion of a foreign object. Meanwhile, the blocking piece 230 may be provided with a protrusion portion contacting with the wall surface of the inner cavity, and the protrusion portion may limit the moving direction of the blocking piece 230, so that the temperature sensing piece 220 drives the blocking piece 230 to move more stably.

Go up lid and base and can realize dismantling the connection through the mode of joint, can also be to be provided with the trompil on going up the lid, the base is provided with the embodiment of screw hole, passes trompil and screw hole threaded connection through the bolt to it is connected to make to go up lid and base can dismantle.

In some embodiments of the present invention, a positioning structure is disposed between the temperature sensing element 220 and the plugging element 230, the temperature sensing element 220 and the plugging element 230 want to abut against each other through the positioning structure, and the positioning structure can limit the temperature sensing element 220 from moving relative to the plugging element 230.

The positioning structure may be a slot disposed on the plugging member 230, the temperature sensing member 220 is provided with an insertion portion 221, the insertion portion 221 is inserted into the slot to limit the movement of the temperature sensing member 220 along a direction other than the length of the slot, and the insertion portion 221 is capable of limiting the removal of the slot by cooperating with the second elastic member 410, so that the temperature sensing member 220 can drive the plugging member 230 to move when expanding or contracting.

According to the utility model discloses a water heater system of second aspect embodiment, including foretell drainage device and the water heater body of preventing frostbite, the water heater body is provided with the water storage chamber and with the water route pipeline of water storage chamber intercommunication, intercommunication piece 100 and water route pipeline intercommunication.

Communicating piece 100 passes through water pipeline and water storage chamber intercommunication, when ambient temperature descends to the threshold value, temperature regulation subassembly 200 produces deformation and opens drainage channel, make the water storage in the water storage chamber discharge through drainage channel, avoid the low temperature to lead to the water storage to freeze and damage water heater body or water pipeline, when ambient temperature risees, temperature regulation subassembly 200 produces deformation shutoff drainage channel, realize the function according to the automatic drainage of ambient temperature with this mode, need not user manual operation, it is more convenient to make the use, also need not outside power supply, use more energy-conservation, high reliability.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims (10)

1. An anti-freeze drain device, comprising:

a communication piece (100), wherein the communication piece (100) is provided with a drainage channel, and the communication piece (100) can be connected with an external water heater;

the temperature adjusting assembly (200) is arranged on the communicating piece (100), and the temperature adjusting assembly (200) can deform according to temperature change to seal or open the drainage channel.

2. The antifreeze drain of claim 1, wherein: the communication piece (100) is provided with a communication cavity (110), and a water inlet port (120), a water outlet port (130) and a water drainage port (140) which are communicated with the communication cavity (110), wherein the water drainage channel is formed between the water inlet port (120) and the water drainage port (140) or between the water outlet port (130) and the water drainage port (140).

3. The antifreeze drain of claim 2, wherein: the temperature adjusting assembly (200) comprises a shell (210), a temperature sensing piece (220) and a blocking piece (230), the shell (210) is connected with the communicating piece (100), the temperature sensing piece (220) is arranged on the shell (210), the blocking piece (230) is connected with the temperature sensing piece (220), the communicating piece (100) is provided with an opening communicated with the communicating cavity (110), the blocking piece (230) penetrates through the opening and extends into the communicating cavity (110), and the temperature sensing piece (220) can expand or contract according to the temperature to drive the blocking piece (230) to block or open the drainage port (140).

4. The antifreeze drain of claim 3, wherein: at least one sealing element (300) is arranged between the blocking piece (230) and the inner wall surface of the communication cavity (110) formed by the communication piece (100).

5. The antifreeze drain of claim 3, wherein: the blocking piece (230) is provided with a pressure relief channel (231), the pressure relief channel (231) can be communicated with the communication cavity (110) and the drainage port (140), the pressure relief channel (231) is provided with a pressure relief structure (240), and the pressure relief structure (240) can block or open the pressure relief channel (231) according to the water pressure in the communication cavity (110).

6. The antifreeze drain of claim 5, wherein: the pressure relief structure (240) comprises a first elastic piece (241) and a blocking piece (242) which are located in the pressure relief channel (231), the pressure relief channel (231) is provided with a narrowing part (232), one end of the first elastic piece (241) is connected with the blocking piece (230), and the other end of the first elastic piece (241) is connected with the blocking piece (242) so that the blocking piece (242) abuts against the narrowing part (232) to block the pressure relief channel (231).

7. The antifreeze drain of claim 3, wherein: the temperature sensing device is characterized by further comprising an operating mechanism (400) arranged on the shell (210), wherein the operating mechanism (400) is connected with the temperature sensing element (220), and the operating mechanism (400) can drive the blocking element (230) to move under the driving of external force.

8. The antifreeze drain of claim 7, wherein: the operating mechanism (400) comprises a second elastic piece (410), a rotating shaft (420) and a handle block (430) connected with the rotating shaft (420), the rotating shaft (420) is rotatably arranged on the shell (210), one end of the second elastic piece (410) is abutted to the shell (210) and the other end of the second elastic piece (410) is abutted to the plugging piece (230) or the temperature sensing piece (220), so that the temperature sensing piece (220) is abutted to the side wall surface of the rotating shaft (420), a protruding portion is arranged on the side wall surface of the rotating shaft (420), and the rotating shaft (420) rotates to enable the protruding portion to push the temperature sensing piece (220).

9. The antifreeze drain of claim 3, wherein: a detachable connecting structure is arranged between the communicating piece (100) and the shell (210), and the communicating piece (100) is detachably connected with the shell (210) through the detachable connecting structure;

the detachable connecting structure comprises an inserting piece (510) and a groove (520) arranged on the shell (210), wherein an inserting hole (521) and a limiting hole (522) are formed in the wall surface of the shell (210) forming the groove (520), an inserting channel (150) is arranged on the communicating piece (100), the communicating piece (100) can extend into the groove (520), and the inserting piece (510) penetrates through the inserting hole (521) and the inserting channel (150) and extends into the limiting hole (522) to limit the communicating piece (100) to be separated from the groove (520);

the shell (210) is provided with a limiting block (160) capable of limiting the insertion piece (510) to be separated from the limiting hole (522).

10. The water heater system, its characterized in that: comprises the anti-freezing drainage device as claimed in any one of claims 1 to 9 and a water heater body, wherein the water heater body is provided with a water storage cavity and a water channel pipeline communicated with the water storage cavity, and the communicating piece (100) is communicated with the water channel pipeline.

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