CN212225372U

CN212225372U - Magnetic sensing thermostat assembly

Info

Publication number: CN212225372U
Application number: CN202020781598.3U
Authority: CN
Inventors: 翁国华
Original assignee: Chuandong Magnetic Electronic Co Ltd
Current assignee: Chuandong Magnetic Electronic Co Ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2020-12-25
Anticipated expiration: 2030-05-12

Abstract

The utility model discloses a magnetic sensing thermostat assembly, which comprises a shell with a circulating cavity and a magnetic sensing thermostat arranged in the circulating cavity; the shell comprises a first shell, a small-circulation water inlet part, a large-circulation water inlet part and a water outlet part; the magnetic sensing thermostat is used for controlling the communication or the blocking of the large-circulation water inlet part and the circulation cavity. The utility model provides a magnetic sensing thermostat assembly compares with current wax formula thermostat assembly and has following advantage: 1. the manufacturing process is simple, and the control mode is simple; 2. the temperature sensing principle of the thermosensitive soft magnet is utilized to achieve the effect of accurate temperature control, and the sensitivity is high; 3. the risk of paraffin loss is fundamentally eliminated.

Description

Magnetic sensing thermostat assembly

Technical Field

The utility model relates to a heat energy control technical field, in particular to magnetic sensing thermostat assembly.

Background

The automobile thermostat assembly is an indispensable part in an automobile engine cooling system. In a cooling system of an automobile, cooling liquid flows through a large circulation or a small circulation respectively through the opening and closing of a thermostat, and finally the purpose of quickly heating an engine in a cold day or quickly radiating the engine in a hot day is achieved.

The thermostat assembly used by the current automobile engine mainly comprises a shell and a wax thermostat arranged in the shell. The principle of the wax type thermostat is as follows; when the cooling temperature is lower than a specified value, the thermostat temperature sensing body refined paraffin is solid, the thermostat shell is in a closed state under the action of the spring, when the temperature of the cooling liquid reaches the specified value, the paraffin begins to melt and gradually becomes liquid, the volume begins to increase, the rubber tube is pressed to shrink the rubber tube, the rubber tube shrinks and simultaneously acts on an upward force of the push rod, the push rod pushes the shell downwards to open the valve, and the cooling liquid flows into a cooling cycle. Generally, the cooling water circulation of the engine includes a large circulation and a small circulation. The start and stop of the large circulation is controlled by opening and closing the large circulation water outlet through the thermostat.

The above-described wax thermostat assembly has the following problems: 1. the structure is complex, and the manufacturing process requirement is high; 2. the paraffin of the wax type thermostat is always lost. If the paraffin loss amount is small, the opening degree of the thermostat is insufficient, the water temperature continues to rise, and finally the engine is overheated. If the paraffin is leaked too much, the thermostat is always in a closed state, the engine can be overheated, and the engine can be burnt out in serious cases.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a magnetic sensing thermostat assembly with simple structure and easy manufacture, aiming at overcoming the defect of paraffin loss in the wax thermostat.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a magnetic sensing thermostat assembly comprises a shell with a circulating cavity and a magnetic sensing thermostat arranged in the circulating cavity; the shell comprises a first shell, a small-circulation water inlet part, a large-circulation water inlet part and a water outlet part; the magnetic sensing thermostat is used for controlling the communication or the blockage of the large-circulation water inlet part and the circulation cavity; the magnetic-sensing thermostat comprises a second shell with a water outlet, a temperature sensing magnet assembly fixedly connected with the second shell, a hard magnet assembly arranged outside the second shell and a switch assembly used for plugging the water outlet, wherein the temperature sensing magnet assembly and the hard magnet assembly can eliminate the magnetic force effect at a preset temperature to drive the switch assembly to remove the plugging of the water outlet.

The temperature sensing magnet assembly comprises a support and a temperature sensing soft magnet arranged on the support, the support is fixedly connected with the second shell, and a flow channel for cooling liquid to flow into the inner cavity of the second shell is formed in the top of the temperature sensing soft magnet.

The bracket is provided with a positioning step for mounting the thermosensitive soft magnet, the middle part of the bracket is provided with an avoidance hole, the bottom of the thermosensitive soft magnet is provided with a suction part, and the suction part penetrates through the avoidance hole; the bottom surface height of the suction portion is lower than that of the support.

Hard magnet subassembly includes the collet and sets up hard magnet on the collet, hard magnet fixes through the cover body on the collet, the inner chamber of the cover body is equipped with the projection, hard magnet suit is in on the projection, the cover body is connected with the collet buckle.

The switch assembly comprises an outer spring sleeved outside the sleeve body, an inner spring arranged in the inner cavity of the second shell, a sealing block and a push rod; the inner spring is used for pushing the sealing block to block the water outlet on the second shell; the push rod is used for pushing the sealing block to remove the blockage of the water outlet.

The push rod comprises a rod body, a positioning ring arranged at the bottom of the rod body, a first clamping groove formed in the rod body and a first clamping ring clamped into the first clamping groove; the first clamping groove is located below the positioning ring, and the bottom support is fixed between the positioning ring and the first clamping ring.

The push rod further comprises a second clamping groove formed in the rod body and a second clamping ring clamped into the second clamping groove, and the second clamping ring is arranged in the inner cavity of the second shell and located above the sealing block; the second snap ring is used for pushing the sealing block to compress the inner spring.

The water outlet is arranged at the top of the second shell, a limiting bulge is arranged at the top of the second shell, a third clamping groove is arranged at the top of the rod body, a third clamping ring is clamped into the third clamping groove, and the third clamping ring is located above the limiting bulge.

The second casing sets up first casing with between the major cycle portion of intaking, first casing, second casing, major cycle portion of intaking can dismantle the connection, be provided with first sealing washer between first casing and the second casing, be equipped with the second sealing washer between second casing and the major cycle portion of intaking.

The second casing is provided with at least two first connecting lugs, the first casing is provided with threaded fixing columns which are equal in number and in one-to-one correspondence with the first connecting lugs, the large-circulation water inlet part is provided with second connecting lugs which are equal in number and in one-to-one correspondence with the first connecting lugs, each first connecting lug is provided with a first fixing hole, each second connecting lug is provided with a second fixing hole, a screw is inserted into the second fixing hole of each second connecting lug, and each screw penetrates through the first fixing hole and is screwed into a corresponding threaded hole of the threaded fixing column.

Has the advantages that:

the utility model provides a magnetism sensing thermostat assembly is provided with magnetism sensing thermostat in the shell, and magnetism sensing thermostat utilizes the ferromagnetism of temperature sensing magnetic material to receive the characteristic of temperature change, and the switch of control thermostat when the temperature of coolant liquid is less than when predetermineeing the temperature value, temperature sensing magnet subassembly and hard magnet subassembly take place the magnetic action suction and be in the same place, the outer spring is compression state, and seal assembly blocks delivery port and water inlet intercommunication. When the temperature of the cooling liquid reaches a preset temperature value, the temperature sensing magnet assembly and the hard magnet assembly lose suction force, the hard magnet assembly drives the push rod to move under the action of the outer spring, and the push rod drives the sealing assembly to remove the blockage of the water outlet. So as to automatically control the switch of the magnetic-sensing thermostat according to the temperature of the cooling liquid. It can be seen that the utility model provides a magnetic sensing thermostat assembly compares with current wax formula thermostat assembly and has following advantage: 1. the manufacturing process is simple, and the control mode is simple; 2. the temperature sensing principle of the thermosensitive soft magnet is utilized to achieve the effect of accurate temperature control, and the sensitivity is high; 3. the risk of paraffin loss is fundamentally eliminated.

Drawings

Fig. 1 is a perspective view of the magnetic sensing thermostat assembly provided by the present invention.

Fig. 2 is an assembly schematic diagram of the magnetic sensing thermostat assembly provided by the present invention.

Fig. 3 is a perspective view of the magnetic sensing thermostat in the magnetic sensing thermostat assembly provided by the present invention.

Fig. 4 is an exploded view of the magnetic sensing thermostat in the magnetic sensing thermostat assembly provided by the present invention.

Fig. 5 is a schematic view of the internal structure of the magnetic sensing thermostat in the closed state in the magnetic sensing thermostat assembly provided by the utility model.

Fig. 6 is a schematic view of the internal structure of the magnetic sensor thermostat in an open state in the magnetic sensor thermostat assembly provided by the utility model.

Fig. 7 is a front view of the magnetic sensing thermostat in the magnetic sensing thermostat assembly provided by the present invention.

Detailed Description

The utility model provides a magnetic sensing thermostat assembly, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right that the following refers to the attached drawing and the embodiment is lifted the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention.

Referring to fig. 1-7, a magnetic sensing thermostat assembly includes a housing 1 having a circulation chamber and a magnetic sensing thermostat 2 disposed in the circulation chamber; the shell 1 comprises a first shell 11, a small circulation water inlet part 12, a large circulation water inlet part 13 and a water outlet part 14; the magnetic sensing thermostat 2 is used for controlling the communication or the blockage of the large-circulation water inlet part 14 and the circulation cavity; the magnetic sensing thermostat 2 comprises a second shell 21 with a water outlet 24, a temperature sensing magnet assembly 3 fixedly connected with the second shell 21, a hard magnet assembly 4 arranged outside the second shell 21 and a switch assembly 5 used for plugging the water outlet 24, wherein the temperature sensing magnet assembly 3 and the hard magnet assembly 4 can eliminate magnetic force at a preset temperature to drive the switch assembly 5 to remove plugging of the water outlet 24.

In one embodiment, as shown in fig. 1 and 2, the small circulation water inlet part 12 is configured as a small circulation water inlet pipe integrally formed with the first housing 11, and the water outlet part 14 is configured as a water outlet pipe and detachably connected with the first housing 11; the water outlet 14 is sealed from the first housing 11 by a third seal ring 15.3.

In this embodiment, as shown in fig. 1 and 2, the second casing 21 is disposed between the first casing 11 and the large circulation water inlet portion 13, the first casing 11, the second casing 21 and the large circulation water inlet portion 13 are detachably connected, a first sealing ring 15.1 is disposed between the first casing 11 and the second casing 21, and a second sealing ring 15.2 is disposed between the second casing 21 and the large circulation water inlet portion 13.

Further, as shown in fig. 1 and 2, at least two first connecting lugs 17 are arranged on the second casing 21, threaded fixing posts 16 which are equal in number and correspond to the first connecting lugs 17 one to one are arranged on the first casing 11, second connecting lugs 18 which are equal in number and correspond to the first connecting lugs 17 one to one are arranged on the large circulation water inlet portion 13, each first connecting lug 17 is provided with a first fixing hole, each second connecting lug 18 is provided with a second fixing hole 22, a screw 19 is inserted into each second fixing hole 22 of each second connecting lug 18, and each screw penetrates through the first fixing hole and is screwed into the corresponding threaded hole of the threaded fixing post 16.

The following brief description is made on the working principle: when the engine works, the cooling liquid enters the circulating cavity from the water outlet pipe, the cooling liquid is in heat transfer with the temperature sensing magnet assembly 3, the temperature sensing magnet assembly 3 is internally provided with the heat-sensitive soft magnet 31, if the temperature of the engine is not high at the moment and the temperature of the cooling liquid is lower than a preset temperature value, namely the temperature is lower than the Curie temperature point of the heat-sensitive soft magnet 31, the temperature sensing magnet assembly 3 and the hard magnet assembly 4 are attracted together under the action of magnetic force, and the switch assembly 5 blocks the water outlet 24; the magnetic thermostat 2 is now in the closed state. The coolant cannot flow into the large circulation water inlet part 13, but only flows into the small circulation water inlet part 12, so that the temperature of the engine is rapidly raised.

When the temperature of the cooling liquid reaches a preset temperature value, namely the Curie temperature point of the thermosensitive soft magnet 31 is reached, the thermosensitive soft magnet 31 loses magnetic conductivity, the temperature sensing magnet assembly 3 and the hard magnet assembly 4 lose suction force, and the hard magnet assembly 4 drives the switch assembly 5 to remove the blockage of the water outlet 24; the magnetic thermostat 2 is now in the open state. The cooling liquid can flow into the large-circulation water inlet part to form large circulation, so that the engine can be rapidly cooled.

When the temperature of the cooling liquid is reduced to be lower than the preset temperature value, the magnetic conductivity of the heat-sensitive soft magnet 31 is recovered, the heat-sensitive soft magnet 31 and the hard magnet 42 are automatically attracted, and the magnetic-sensing thermostat 2 is in a closed state. So as to automatically control the on-off of the magnetic sensing thermostat 2 according to the temperature of the cooling liquid.

It can be seen that the utility model provides a magnetic sensing thermostat assembly compares with current wax formula thermostat assembly and has following advantage: 1. the manufacturing process is simple, and the control mode is simple; 2. the temperature sensing principle of the thermosensitive soft magnet 31 is utilized to achieve the effect of accurate temperature control, and the sensitivity is high; 3. the risk of paraffin loss is fundamentally eliminated.

Specifically, as shown in fig. 4 and 7, the temperature sensing magnet assembly 3 includes a support 30 and a temperature sensitive soft magnet 31 disposed on the support 30, the support 30 is fixedly connected to the second casing 21, and a flow channel 32 for cooling fluid to flow into the inner cavity of the second casing 21 is formed at the top of the temperature sensitive soft magnet 31. In this embodiment, two and symmetrical flow channels 32 are provided, each flow channel 32 is in a semi-arc shape, and the cooling liquid enters the inner cavity of the housing through the flow channel 32 and is directly contacted with the thermosensitive soft magnet 31, so that the cooling liquid can directly transfer heat with the thermosensitive soft magnet 31, and the technical effect of precise temperature control is achieved; the flow channel 32 can reduce the used materials of the thermosensitive soft magnet 31 and save the cost, and the flow channel 32 is wide and the cooling liquid flows smoothly without causing blockage.

The thermosensitive soft magnet 31 is mainly composed of a thermosensitive metal material and a thermosensitive ferrite, and ferromagnetic substances in the thermosensitive soft magnet 31 lose ferromagnetism and become paramagnetic when the temperature is higher than a certain temperature (the transition temperature is the curie temperature point). While the ferromagnetic substance in the thermally sensitive soft-magnetic body 31 regains ferromagnetic properties below a certain temperature (the transition temperature being the curie temperature point). When the thermally sensitive soft magnet 31 has ferromagnetism, the thermally sensitive soft magnet 31 and the hard magnet 42 are attracted to each other by the magnetic force. When the soft heat-sensitive magnet 31 loses ferromagnetism, the soft heat-sensitive magnet 31 and the hard magnet 42 cannot magnetically attract each other. The skilled person may adjust the ratio of the materials in the heat sensitive soft-magnetic body 31 to set the curie temperature point of the heat sensitive soft-magnetic body 31. Under the closed state of the magnetic sensing thermostat 2, the cooling liquid enters the flow channel 32 and then directly contacts the first magnet, so that the cooling liquid can directly transfer heat with the first magnet, and the technical effect of accurate temperature control is achieved.

In one embodiment, as shown in fig. 4 and 5, a positioning step 33 for mounting the heat-sensitive soft magnet 31 is arranged on the support 30, an avoidance hole 34 is formed in the middle of the support 30, a suction portion 35 is arranged at the bottom of the heat-sensitive soft magnet 31, and the suction portion 35 penetrates through the avoidance hole 34; the bottom surface of the suction portion 35 is lower than the bottom surface of the bracket 30. With this arrangement, the bottom surface of the attraction portion 35 can be in direct contact with the temperature-sensitive magnet assembly 3, preventing the bracket 30 from being bonded and interfering with the temperature-sensitive magnet assembly 3.

In an embodiment, as shown in fig. 5, hard magnet assembly 4 includes collet 41 and sets up hard magnet 42 on collet 41, this hard magnet 42's material can be ferrite material or neodymium iron boron material, hard magnet 42 fixes through cover body 43 on collet 41, the inner chamber of cover body 43 is equipped with projection 44, and for the convenience of guaranteeing that hard magnet 42's focus is steady, hard magnet 42 sets up to cylindric, hard magnet 42 suit is in on projection 44, cover body 43 wraps up hard magnet 42 completely, realizes hard magnet 42's location. The hard magnet 42 is sleeved on the convex column 44, and the sleeve body 43 is connected with the bottom support 41 in a buckling manner.

In an embodiment, a plurality of fastening flanges 45 are arranged on the side wall of the bottom end of the sleeve body 43, the bottom support 41 is provided with corresponding clamping blocks 46, and the sleeve body 43 and the bottom support 41 are connected through the fastening flanges 45 and the clamping blocks 46 in a buckling manner. During assembly, the sleeve body 43 is only required to be directly pressed to the upper end of the bottom support 41, so that connection can be completed, and the assembly and disassembly are convenient.

In one embodiment, as shown in fig. 4-5, the switch assembly 5 includes an outer spring 52 sleeved outside the sleeve body 43, an inner spring 53 disposed in the inner cavity of the second housing 21, a sealing block 54, and a push rod 55; the outer spring 52 is arranged between the thermosensitive soft magnet 31 and the bottom support 41, the bottom of the sealing block 54 is provided with an installation cavity, the bottom end of the inner spring 53 is pressed against the top of the thermosensitive soft magnet 31, and the top end of the inner spring 53 is clamped in the installation cavity; the inner spring 53 is used for pushing the sealing block 54 to block the water outlet 24 on the second shell 21; the heat-sensitive soft magnet 31 and the hard magnet 42 are sleeved on a push rod 55, and the push rod 55 is used for pushing the sealing block 54 to remove the blockage of the water outlet 24. When the magnetic sensitive thermostat 2 is in a closed state, the inner spring 53 exerts elastic force on the sealing block 54, so that the sealing block 54 tightly blocks the water outlet 24 of the second shell 21 and blocks the coolant from flowing into the large-circulation water inlet 13 from the water outlet 24.

In an embodiment, as shown in fig. 4, the push rod 55 includes a rod body 55.4, a positioning ring 64 disposed at the bottom of the rod body 55.4, a first locking groove 55.1 formed on the rod body 55.4, and a first locking ring 61 locked into the first locking groove 55.1; the first locking groove 55.1 is located below the positioning ring 64, and the bottom bracket 41 is fixed between the positioning ring 64 and the first snap ring 61. In order to make the structure more compact, the bottom support 41 is configured to be a disk shape, the bottom end of the outer spring 52 is pressed against the bottom surface of the inner cavity of the bottom support 41, a first through hole 71 for the push rod 55 to pass through is provided on the bottom support 41, and the first through hole 71 is also a central through hole of the bottom support 41. In practical assembly, after the bottom end of the push rod 55 is inserted into the first through hole 71, the positioning ring 64 is pressed against the upper surface of the bottom support 41, and then the first clamping ring 61 is clamped into the first clamping groove 55.1, so that the bottom support 41 is fixed between the positioning ring 64 and the first clamping ring 61, and the mounting and dismounting are convenient and the fixing is reliable.

In one embodiment, as shown in fig. 4, in order to reduce the influence of the bottom support 41 on the fluidity of the cooling liquid, the bottom support 41 is provided with a plurality of circumferentially arrayed flow guiding grooves.

In one embodiment, see fig. 4, in order to avoid interference of the hard magnet 42 with the positioning ring 64, the middle of the second magnet is provided with a countersunk through hole 42.1, and an interference-proof gap is formed between the countersunk portion of the countersunk through hole and the positioning ring 64.

In one embodiment, as shown in fig. 4 to 6, the push rod 55 further includes a second locking groove 55.2 formed on the rod body 55.4 and a second locking ring 62 locked into the second locking groove 55.2, where the second locking ring 62 is disposed in the inner cavity of the second housing and above the sealing block 54; the second snap ring 62 is used to push the sealing block 54 to compress the inner spring 53. When the magnetic thermostat 2 is in an open state, under the action of the outer spring 52, the base support 41 drives the push rod 55 to move away from the first component, and the second snap ring 62 also moves along with the push rod 55 to push the sealing block 54 to compress the spring downwards, so that the sealing block 54 releases the blockage of the water outlet 24 of the second housing 21. In order to facilitate the close contact between the second snap ring 62 and the sealing block 54 and also reduce the adhesion between the second snap ring 62 and the upper surface of the sealing block 54, the sealing block 54 is disc-shaped, and a circular groove 54.1 for accommodating the second fixture block 46 is formed in the middle of the sealing block.

In an embodiment, as shown in fig. 5 and 6, the water outlet 24 is opened at the top of the second casing 21, a limiting protrusion 26 is disposed at the top of the second casing 21, a third clamping groove 55.3 is disposed at the top of the rod body 55.4, a third clamping ring 63 is clamped into the third clamping groove 55.3, and the third clamping ring 63 is located above the limiting protrusion 26. The third snap ring 63 is provided to restrict the movement of the second housing 21 between the first snap ring 61 and the third snap ring 63, and to prevent the second housing 21 from being detached from the push rod 55.

In order to further ensure the clamping strength, the first clamping ring 61, the second clamping ring 62 and the third clamping ring 63 are preferably E-shaped clamping rings.

In one embodiment, as shown in fig. 4, at least two third engaging lugs 36 are fixedly connected to the outer edge of the support 30, the bottom of the second casing 21 is provided with connecting posts 23 corresponding to the third engaging lugs 36 in number one by one, each third engaging lug 36 is provided with a first threaded hole, each connecting post 23 is provided with a second threaded hole, a screw is screwed into the first threaded hole of each third engaging lug 36 from top to bottom, the top end of each screw is screwed into the second threaded hole of the corresponding connecting post 23, and the support 30 presses the thermosensitive soft magnet 31 against the water inlet 25 of the second casing 21. Preferably, the outer edge of the bracket 30 is fixedly connected with 3 third engaging lugs 36, and the circumferential included angle between any two adjacent third engaging lugs 36 is 120 degrees; 3 connecting columns 23 on the shell are correspondingly arranged; of course, 3 screws are provided accordingly. The arrangement improves the connecting strength of the bracket 30 and the shell, and the thermosensitive soft magnetic block cannot incline.

In order to avoid the push rod 55, a second through hole 72 is formed in the sleeve body 43, a third through hole 73 is formed in the thermosensitive soft magnet 31, a fourth through hole 74 is formed in the sealing block 54, and a fifth through hole 75 is formed in the limiting protrusion 26 and is a central through hole of a part.

The assembly process of the magnetic sensitive thermostat assembly is briefly described as follows: firstly, assembling the magnetic-sensing thermostat 2, inserting the bottom end of the push rod 55 into the first through hole 71 of the bottom support 41, pressing the positioning ring 64 against the bottom support 41, and clamping the first clamping ring 61 into the first clamping groove 55.1; the hard magnet 42 is sleeved in the sleeve body 43, the push rod 55 passes through the second through hole 72 of the sleeve body 43, the sleeve body 43 is connected with the bottom support 41 in a buckling manner, and then the outer spring 52 is placed on the bottom support 41; support 30, temperature sensing soft magnet 31, inner spring 53, sealed piece 54 penetrate push rod 55 in proper order, and second snap ring 62 card is gone into second draw-in groove 55.2, push rod 55 passes the fifth through-hole 75 of spacing arch 26, and second casing 21 parcel inner spring 53 and sealed piece 54 and second snap ring 62, spliced pole 23 on the second casing 21 and support 30's third engaging lug 36 one-to-one and screw connection, third snap ring 63 card is gone into in third draw-in groove 55.3 at last, accomplishes the assembly of magnetic sensing thermostat 2. The magnetic sensing thermostat 2 is installed in the circulating cavity, after a first sealing ring 15.1 is placed between the first shell 11 and the second shell 21, and after a second sealing ring 15.2 is placed between the second shell 21 and the large circulating water inlet part 13, the first shell 11 is connected with the second shell 21 and the large circulating water inlet part 13 through screws, and then the assembly of the magnetic sensing thermostat 2 can be completed. Therefore, the assembly difficulty of the magnetic sensitive thermostat assembly is low, the requirement on the manufacturing process is low, and the production efficiency can be well ensured by manually assembling.

It is understood that equivalent substitutions or changes can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such changes or substitutions shall fall within the scope of the present invention.

Claims

1. A magnetic sensitive thermostat assembly is characterized by comprising a shell with a circulating cavity and a magnetic sensitive thermostat arranged in the circulating cavity; the shell comprises a first shell, a small-circulation water inlet part, a large-circulation water inlet part and a water outlet part; the magnetic sensing thermostat is used for controlling the communication or the blockage of the large-circulation water inlet part and the circulation cavity; the magnetic-sensing thermostat comprises a second shell with a water outlet, a temperature sensing magnet assembly fixedly connected with the second shell, a hard magnet assembly arranged outside the second shell and a switch assembly used for plugging the water outlet, wherein the temperature sensing magnet assembly and the hard magnet assembly can eliminate the magnetic force effect at a preset temperature to drive the switch assembly to remove the plugging of the water outlet.

2. The magnetic sensing thermostat assembly of claim 1 wherein the temperature sensing magnet assembly includes a support, a temperature sensitive soft magnet disposed on the support, the support being fixedly connected to the second housing, the top of the temperature sensitive soft magnet defining a flow path for cooling fluid to flow into the interior of the second housing.

3. The magnetic sensing thermostat assembly according to claim 2, wherein the bracket is provided with a positioning step for mounting the heat sensitive soft magnet, the middle part of the bracket is provided with an avoidance hole, the bottom of the heat sensitive soft magnet is provided with an attraction part, and the attraction part passes through the avoidance hole; the bottom surface height of the suction portion is lower than that of the support.

4. The magnetic sensing thermostat assembly of claim 1, wherein the hard magnet assembly comprises a base and a hard magnet disposed on the base, the hard magnet is fixed on the base by a sleeve, an inner cavity of the sleeve is provided with a convex pillar, the hard magnet is sleeved on the convex pillar, and the sleeve is connected with the base in a buckling manner.

5. The magnetic sensing thermostat assembly of claim 4 wherein the switch assembly includes an outer spring that is nested outside the housing, an inner spring that is disposed in the second housing cavity, a sealing block, and a push rod; the inner spring is used for pushing the sealing block to block the water outlet on the second shell; the push rod is used for pushing the sealing block to remove the blockage of the water outlet.

6. The magnetic sensing thermostat assembly of claim 5 wherein the push rod comprises a rod body, a positioning ring disposed at the bottom of the rod body, a first clamping groove formed in the rod body, and a first clamping ring clamped into the first clamping groove; the first clamping groove is located below the positioning ring, and the bottom support is fixed between the positioning ring and the first clamping ring.

7. The magnetic sensing thermostat assembly of claim 6 wherein the push rod further comprises a second snap ring disposed in the rod and snap-fitted into the second snap ring, the second snap ring being disposed in the inner cavity of the second housing and above the sealing block; the second snap ring is used for pushing the sealing block to compress the inner spring.

8. The magnetic sensing thermostat assembly of claim 6 wherein the water outlet is disposed at the top of the second housing, the top of the second housing is provided with a limiting protrusion, the top of the rod is provided with a third slot, the third slot is engaged with a third snap ring, and the third snap ring is located above the limiting protrusion.

9. The magnetic sensing thermostat assembly of claim 1 wherein the second housing is disposed between the first housing and the large circulation water inlet portion, the first housing, the second housing and the large circulation water inlet portion are detachably connected, a first sealing ring is disposed between the first housing and the second housing, and a second sealing ring is disposed between the second housing and the large circulation water inlet portion.

10. The thermostat assembly as claimed in claim 9, wherein the second housing has at least two first connecting lugs, the first housing has a number of corresponding screw fixing posts, the water inlet portion of the large circulation pump has a number of corresponding second connecting lugs, each first connecting lug has a first fixing hole, each second connecting lug has a second fixing hole, a screw is inserted into the second fixing hole of each second connecting lug, and each screw passes through the first fixing hole and is screwed into the screw hole of the corresponding screw fixing post.