CN212157383U

CN212157383U - Water floor heating protection device

Info

Publication number: CN212157383U
Application number: CN202020512851.5U
Authority: CN
Inventors: 李增清; 李渊; 张华军
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-12-15
Anticipated expiration: 2030-04-10

Abstract

The invention provides a novel water floor heating protection device, in particular to a floor heating protection device which has a water leakage protection function, can periodically and fully automatically clean and discharge dirt and has a pressure difference bypass valve function, has the advantages of reasonable design and simple structure, has the water leakage protection function, can periodically and fully automatically clean and discharge dirt, has the pressure difference bypass valve function, can periodically and fully automatically scrape and remove impurities on a filter screen, synchronizes the dirt cleaning and the dirt discharge, greatly improves the cleaning convenience of the water floor heating protection device, correspondingly prolongs the service life of equipment, and combines the water leakage protection function, so that the performance of the water floor heating protection device is greatly improved, and the cost performance is extremely competitive.

Description

Water floor heating protection device

Technical Field

The utility model belongs to the technical field of warm logical, a protection device's technique warms up water is related to, especially relate to a protection function and can full-automatic blowdown of leaking have the technique of pressure differential bypass valve function concurrently in area.

Background

The water floor heating is the most extensive heating mode in the heating and ventilation industry, and has centralized heating and distributed heating, and particularly is the most common water floor heating in cold regions.

Generally, circulating water in the water floor heater is dirty, has a lot of impurities, easily causes the failure of branch water collector control, causes the scale deposit of floor heating pipeline to lead to heat exchange efficiency's greatly reduced, and correspondingly, the energy consumption rises, and heating expense water rises ship height, causes very big waste to the energy.

In view of the above situation, in traditional water floor heating, a Y-shaped filter is often installed in front of a water collecting and distributing device and used for filtering impurities in water, but the Y-shaped filter is small in filtering precision and limited in filtering capacity, cannot regularly and fully automatically discharge sewage and remove dirt, and brings inconvenience to users.

Traditional irrigated and heated floor lacks the protection of leaking, and although irrigated and heated floor has a great deal of advantage, irrigated and heated floor is afraid of leaking most, in case leak, will cause huge loss of property for the user.

Traditional warm ground of water is rarely had pressure protection, though has the bypass valve of adorning at water collection and collection ware end, installs the bypass valve at water collection and collection ware end, only can play pressure balance effect, can not play reposition of redundant personnel step-down effect.

Traditional water ground heating does not have more direct emergency protection device to the temperature of the inflow water is too high or the return water temperature is too low, and the user needs to be able to turn off or open the return water ball valve fast to protect the pipe network from bursting or frost cracking under the condition that the temperature of the water is ultrahigh or too low.

Disclosure of Invention

The utility model aims at prior art problem, a provide a new protection device warms up water, especially a protection function leaks in area and can regularly full-automatic blowdown have the protection device warms up of pressure differential bypass valve function concurrently of decontaminating.

In order to achieve the above purpose, the utility model adopts the following technical proposal: a floor heating protection device comprises a floor heating protection device and is characterized in that the floor heating protection device comprises a filtering part with a pressure difference bypass valve inside, the filtering part comprises a filtering part shell, a filter cylinder, a speed reducing motor, a cleaning scraping brush component and a pressure difference bypass valve core component, the filtering part shell comprises a main shell, a top cover, a bottom cover and a valve seat between the main shell and the top cover, the valve seat is matched with the pressure difference bypass valve core component, the circular inner cavity of the filtering part shell is divided into an upper cavity and a lower cavity by the valve seat, one side of the upper cavity is provided with a water inlet connecting port, a water inlet connecting head is arranged in the water inlet connecting port, the other corresponding side is provided with a purified water outlet, a first electric ball valve is arranged at the purified water outlet, and a magnetic water flow is arranged in the inner cavity of a water inlet or a water outlet of the first, a Hall sensor is arranged on the outer wall of the valve body corresponding to the magnetic water flow rotor component, and the Hall sensor and the valve body form a water flow sensor; the filter cartridge is arranged in the upper cavity and is integrally tubular, the peripheries of two ports of the filter cartridge are respectively provided with an outward-protruding O-shaped ring sealing structure, the O-shaped ring sealing structures are in sealing fit with the inner wall of the upper cavity, an annular water purification cavity is formed between the two O-shaped ring sealing structures, the water purification cavity is communicated with a purified water outlet, a raw water inlet is formed in one side surface of an upper port of the filter cartridge, the raw water inlet is in sealing insertion fit with the front end of the water inlet connector, and a filter screen is arranged on the inner wall of the filter cartridge below the raw water inlet; the cleaning scraping brush component is arranged on a central axis in the filter cylinder, a plurality of flexible scraping strips or bristles are arranged on the outer surface of the cleaning scraping brush component and are attached to the surface of the filter screen, a rotating connecting rod is arranged at the center of the top cover and forms dynamic sealing fit with the rotating connecting rod, the lower end of the rotating connecting rod is connected with the upper end of the cleaning scraping brush component, the upper end of the rotating connecting rod is connected with the speed reducing motor arranged on the top cover, and the speed reducing motor can drive the cleaning scraping brush component to rotate in the filter cylinder; a water return connecting port is arranged on the same side of the lower cavity close to the water inlet connecting port, a water return inlet is arranged on the other side corresponding to the water return connecting port, a second electric ball valve is arranged at the water return inlet, a magnetic water flow rotor assembly is arranged in an inner cavity of a water inlet or a water outlet of the second electric ball valve, a Hall sensor is arranged on the outer wall of a valve body corresponding to the magnetic water flow rotor assembly, and the Hall sensor and the water flow rotor assembly form a water flow sensor; the Hall sensor is connected to an electronic controller, and the electronic controller controls the first electric ball valve, the second electric ball valve and the speed reducing motor to cooperatively operate. Generally, the flexible scraping and brushing dirt cleaning device is cylindrical as a whole, a hexagonal inner hole is formed in the upper end opening of the flexible scraping and brushing dirt cleaning device, one end, matched with the rotary connecting rod, of the flexible scraping and brushing dirt cleaning device is hexagonal, and brush bristles are regularly planted on the outer surface of the flexible scraping and brushing dirt cleaning device.

The ground heating protection device is characterized in that the differential pressure bypass valve core assembly is arranged on the bottom cover to form a combination body, one end of an adjusting rod of the differential pressure bypass valve core assembly extends out of the bottom cover, differential pressure setting and adjusting can be carried out on the differential pressure bypass valve core assembly through the adjusting rod, when the differential pressure between the upper cavity and the lower cavity exceeds a set value, a sealing gasket at the top end of the differential pressure bypass valve core assembly is separated from the valve seat, water in the upper cavity flows into the lower cavity, and then the water is discharged through the water return connecting port.

The above-mentioned floor heating protection device is characterized in that the main valve body parts of the first electric ball valve and the second electric ball valve and the main housing are of an integrated structure. Generally, such a design not only saves material, but also primarily makes the product look more compact and aesthetically pleasing.

The floor heating protection device is characterized in that the main valve body parts of the first electric ball valve and the second electric ball valve and the main shell are of an integral structure, the first electric ball valve and the second electric ball valve share one electric actuator, the main valve bodies of the first electric ball valve and the second electric ball valve are communicated through a tubular part, a transmission rod is arranged in the tubular part, the upper end of the transmission rod is connected to a spherical valve core of the first electric ball valve, the lower end of the transmission rod is connected to a spherical valve core of the second electric ball valve, and the electric actuator arranged at the top of the first electric ball valve drives the first electric ball valve to be switched on and off and synchronously drives the second electric ball valve to be switched on and off through the transmission rod.

The above water floor heating protection device is characterized in that an O-shaped sealing ring is arranged on the periphery of the front end of the water inlet connector, and the O-shaped sealing ring is in sealing insertion fit with the inner wall of the raw water inlet at the upper end part of the filter cylinder. Generally, when the front end of the water inlet connector is screwed into the raw water inlet of the filter cartridge, the filter cartridge is fixed inside the filter housing and is not rotated by the rotation of the dirt removing wiper member.

The water floor heating protection device is characterized by further comprising a decorative outer shell, wherein the decorative outer shell comprises a section shell and plastic sealing covers arranged at two ports of the section shell.

The floor heating protection device is characterized in that the water flow sensor can reflect the change of water flow, the dynamic change of the water flow is converted into a pulse signal through the Hall sensor and fed back to the electronic controller, the specifications of the water flow sensors in the first electric ball valve and the second electric ball valve are the same, under normal conditions, the water amount of the floor heating system entering and exiting the floor heating pipe network system is equivalent, when the water flow sensors in the first electric ball valve and the second electric ball valve reflect the water flow difference, when the difference reaches a set parameter value, the floor heating pipe network is judged to leak, the difference signal is used as a set instruction and sent to the first electric ball valve and the second electric ball valve, and the two electric ball valves are turned off through the electric actuator.

At foretell protection device warms up aquatic products, its characterized in that last lateral wall of cavity on be provided with first temperature sensor installing port, the lateral wall of lower cavity on or be provided with the second temperature sensor installing port on the bottom, install temperature sensor in this first temperature sensor installing port and second temperature sensor installing port, this temperature sensor is connected to electronic controller on, and through this electronic controller to the too high or low energy of temperature and return water temperature of intaking in time make emergent reaction.

The above water floor heating protection device is characterized in that one surface of the sealing retainer ring facing the upper cavity is provided with a polygonal convex body, the lower port of the filter cylinder is sleeved on the polygonal convex body, and the lower port of the filter cylinder is polygonal and matched with the polygonal convex body.

The floor heating protection device is characterized in that the first electric ball valve, the second electric ball valve and the return water connecting port are all of an internal thread structure, and are respectively provided with a conversion joint matched with the first electric ball valve, the second electric ball valve and the return water connecting port.

Compared with the prior art, the floor heating protection device has the advantages of reasonable design and simple structure, has the water leakage protection function, can regularly and fully automatically clean and discharge dirt and has the function of a pressure difference bypass valve. Can accomplish to the impurity on the filter screen regularly full-automatic scraping brush clear away, accomplish that trash cleaning and blowdown are synchronous, improve the abluent convenience of this protection device warms up water itself greatly, correspondingly prolonged the life of equipment, simultaneously, combined the protect function that leaks for this protection device warms up water's performance is promoted by a wide margin, and the price/performance ratio is extremely competitive.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. The drawings are provided for reference and illustration purposes only and are not intended to be limiting of the present invention.

Fig. 1 is a schematic structural view of a floor heating protection device in embodiment 1 provided by the present invention;

fig. 2 is a schematic structural view of a main body part of the floor heating protection device provided by the utility model without a speed reduction motor and an electric actuator;

fig. 3 is an exploded view of the main body of the floor heating protection device provided by the present invention corresponding to fig. 2;

fig. 4 is a schematic structural diagram of a main housing in a floor heating protection device provided by the present invention;

fig. 5 is a schematic structural view of a filter cartridge provided by the present invention;

FIG. 6 is a schematic view of the structure of the cleaning and scraping brush component provided by the present invention;

FIG. 7 is a schematic structural view of the bottom cover and the differential pressure bypass valve core assembly integrated together;

fig. 8 is a schematic diagram of an appearance front structure of a pre-filter according to the present invention.

In the figure, a floor heating protection device 1, a filter part 2, a filter part shell 3, a main shell 3a, a top cover 3b, a bottom cover 3c, a valve seat 3d, a first temperature sensor mounting port 3e, a second temperature sensor mounting port 3f, a polygonal convex body 3g, a filter cartridge 4, an O-shaped ring sealing structure 4a, a water purification cavity 4b, a raw water inlet 4c, a filter screen 4d, a speed reducing motor 5, a dirt cleaning and scraping component 6, a positioning hole 60, a differential pressure bypass valve core component 7, a positioning shaft 70, a first electric ball valve 8, a magnetic water flow rotor component 8a, a Hall sensor 8b, a water flow sensor 8c, an upper cavity 10, a water inlet connecting port 10a, a water inlet connecting head 10b, a purified water outlet 10c, a lower cavity 11, a rotating connecting rod 12, an electronic controller 13, a tubular component 14, a transmission rod 15, a decorative outer shell 16, a profile shell 16a, A temperature sensor 17 and an adapter 18.

Detailed Description

Example (b):

as shown in fig. 1 to 8, a floor heating protection device 1 comprises a filter part 2 with a differential pressure bypass valve inside, the filter part 2 comprises a filter part housing 3, a filter cartridge 4, a speed reduction motor 5, a cleaning brush component 6 and a differential pressure bypass valve core component 7, the filter part housing 3 comprises a main housing 3a, a top cover 3b, a bottom cover 3c and a valve seat 3d therebetween, the valve seat 3d is matched with the differential pressure bypass valve core component 7, the circular inner cavity of the filter part housing 3 is divided into an upper cavity 10 and a lower cavity 11 by the valve seat 3d, one side of the upper cavity 10 is provided with a water inlet connector 10a, a water inlet connector 10b is arranged in the water inlet connector 10a, the other corresponding side is provided with a purified water outlet 10c, a first electric ball valve 8 is arranged at the purified water outlet 10c, a magnetic water flow rotor component 8a is arranged in the inner cavity of the water inlet or the water outlet of the first electric ball valve 8, a Hall sensor 8b is arranged on the outer wall of the valve body corresponding to the magnetic water flow rotor assembly 8a, and the Hall sensor and the valve body form a water flow sensor 8 c; the reduction motor 5 is a permanent magnet synchronous reduction motor.

The filter cartridge 4 is arranged in the upper cavity 10 and is integrally tubular, the peripheries of two ports of the filter cartridge are respectively provided with an outward-protruding O-shaped ring sealing structure 4a, the O-shaped ring sealing structure 4a is in sealing fit with the inner wall of the upper cavity 10, an annular water purification cavity 4b is formed between the two O-shaped ring sealing structures 4a, the water purification cavity 4b is communicated with a water purification outlet 10c, a raw water inlet 4c is formed in one side surface of an upper port of the filter cartridge 4, an O-shaped sealing ring is arranged on the periphery of the front end of the water inlet connector 10b and forms sealing insertion fit with the inner wall of the raw water inlet 4c at the upper end of the filter cartridge 4, and a filter screen 4d is arranged on the inner wall of the filter cartridge below the.

The cleaning and scraping component 6 is arranged on a central axis in the filter cylinder 4, a plurality of flexible scraping strips or bristles are arranged on the outer surface of the cleaning and scraping component 6 and attached to the surface of the filter screen 4d, a rotating connecting rod 12 is arranged at the center of the top cover 3b and forms dynamic sealing fit with the rotating connecting rod 12, the lower end of the rotating connecting rod 12 is connected with the upper end of the cleaning and scraping component 6, the upper end of the rotating connecting rod 12 is connected with the speed reducing motor 5 arranged on the top cover 3b, and the speed reducing motor 5 can drive the cleaning and scraping component 6 to rotate in the filter cylinder 4. The bottom end of the cleaning and scraping component 6 is provided with a positioning hole 60.

A water return connecting port 11a is arranged on the same side of the lower cavity 11 close to the water inlet connecting port 10a, a water return inlet 11b is arranged on the other side corresponding to the water return connecting port 11a, a second electric ball valve 9 is arranged at the water return inlet 11b, a magnetic water flow rotor assembly 8a is arranged in an inner cavity of a water inlet or a water outlet of the second electric ball valve 9, a Hall sensor 8b is arranged on the outer wall of a valve body corresponding to the magnetic water flow rotor assembly 8a, and the two form a water flow sensor 8 c; the hall sensor 8b is connected to an electronic controller 13, and the electronic controller 13 controls the cooperative operation of the first and second

electric ball valves

8 and 9 and the reduction motor 5.

In this embodiment, the differential pressure bypass valve core assembly 7 is installed on the bottom cover 3c to form a combined body, wherein one end of an adjusting rod of the differential pressure bypass valve core assembly 7 extends out of the bottom cover 3c, the differential pressure setting adjustment can be performed on the differential pressure bypass valve core assembly 7 through the adjusting rod, when the differential pressure between the upper cavity 10 and the lower cavity 11 exceeds a set value, a sealing gasket at the top end of the differential pressure bypass valve core assembly 7 is separated from the valve seat 3d, so that water in the upper cavity 10 flows into the lower cavity 11, and then is discharged through the water return connecting port 11 a. The top end of the valve core assembly 7 of the differential pressure bypass valve is provided with a positioning shaft 70, and the positioning shaft 70 is matched with the positioning hole 60 on the bottom end of the cleaning and scraping component 6.

In this embodiment, the main valve body portions of the first electric ball valve 8 and the second electric ball valve 9 and the main housing 3a are an integral structure, and the first electric ball valve 8 and the second electric ball valve 9 share one electric actuator, the main valve bodies of the first electric ball valve 8 and the second electric ball valve 9 are communicated through a tubular member 14, a transmission rod 15 is arranged in the tubular member 14, the upper end of the transmission rod 15 is connected to the spherical valve core of the first electric ball valve 8, and the lower end of the transmission rod 15 is connected to the spherical valve core of the second electric ball valve 9, and the electric actuator arranged at the top of the first electric ball valve 8 drives the first electric ball valve 8 to be opened and closed and simultaneously drives the second electric ball valve 9 to be opened and closed through.

In this embodiment, the floor heating protection device 1 further includes a decorative outer casing 16, and the decorative outer casing 16 includes a profile casing 16a and plastic covers 16b disposed at two ports of the profile casing 16 a.

The water flow sensor 8c can reflect the change of the water flow, and the dynamic change of the water flow is converted into a pulse signal through the Hall sensor 8b and fed back to the electronic controller 13, the specifications of the water flow sensor 8c in the first electric ball valve 8 and the second electric ball valve 9 are the same, under normal conditions, the water amount of the floor heating system entering and exiting the floor heating pipe network system is equivalent, when the water flow sensor 8c in the first electric ball valve 8 and the water flow sensor 8c in the second electric ball valve 9 have a difference value, and when the difference value reaches a set parameter value, the floor heating pipe network is judged to leak water, the difference signal is used as a set instruction and sent to the first electric ball valve 8 and the second electric ball valve 9, and the two electric ball valves are turned off through an electric actuator.

In this embodiment, a first temperature sensor mounting port 3e is provided on the outer side wall of the upper cavity 10, a second temperature sensor mounting port 3f is provided on the bottom cover 3c of the lower cavity 11, temperature sensors 17 are installed in the first temperature sensor mounting port 3e and the second temperature sensor mounting port 3f, the temperature sensors 17 are connected to the electronic controller 13, and an emergency response is timely made to the overhigh or overlow low energy of the inlet water temperature and the return water temperature through the electronic controller 13.

In this embodiment, a polygonal protrusion 3g is provided on a surface of the valve seat 3d facing the upper chamber 10, the lower port of the filter cartridge 4 is fitted over the polygonal protrusion 3g, and the lower port of the filter cartridge 4 is also polygonal and matches with the polygonal protrusion 3 g. Such cooperation allows the cartridge 4 to be secured within the upper chamber 10.

In this embodiment, the first electric ball valve 8, the second electric ball valve 9 and the water return connection port 11a are all set to be of an internal thread structure, and are respectively provided with a conversion joint 18 to be matched with the internal thread structure, so that the body of the water floor heating protection device 1 is fixed in the section shell 90.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although terms such as a floor heating protection device, a filter part housing, a main housing, a top cover, a bottom cover, a valve seat, a first temperature sensor mounting port, a second temperature sensor mounting port, a polygonal convex body, a filter cartridge, an O-ring sealing structure, a water purification cavity, a raw water inlet, a filter screen, a speed reduction motor, a dirt cleaning and scraping brush component, a positioning hole, a differential pressure bypass valve element component, a positioning shaft, a first electric ball valve, a magnetic water flow rotor component, a hall sensor, a water flow sensor, an upper cavity, a water inlet connecting port, a water inlet connector, a purified water outlet, a lower cavity, a rotating connecting rod, an electronic controller, a tubular component, a transmission rod, a decorative housing, a profile housing, a plastic sealing cover, a temperature sensor, a conversion joint and the like are used more often. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A floor heating protection device comprises a floor heating protection device (1) and is characterized in that the floor heating protection device (1) comprises a filtering part (2) with a differential pressure bypass valve inside, the filtering part (2) comprises a filtering part shell (3), a filter cylinder (4), a speed reduction motor (5), a cleaning and scraping brush component (6) and a differential pressure bypass valve core component (7), the filtering part shell (3) comprises a main shell (3 a), a top cover (3 b), a bottom cover (3 c) and a valve seat (3 d) between the two, the valve seat (3 d) is matched with the differential pressure bypass valve core component (7), the circular inner cavity of the filtering part shell (3) is divided into an upper cavity (10) and a lower cavity (11) by the valve seat (3 d), a water inlet connector (10 a) is arranged on one side of the upper cavity (10), and a water inlet connector (10 b) is arranged in the water inlet connector (10 a), a purified water outlet (10 c) is arranged at the other corresponding side, a first electric ball valve (8) is arranged at the purified water outlet (10 c), a magnetic water flow rotor component (8 a) is arranged in an inner cavity of a water inlet or a water outlet of the first electric ball valve (8), a Hall sensor (8 b) is arranged on the outer wall of the valve body corresponding to the magnetic water flow rotor component (8 a), and the Hall sensor and the magnetic water flow rotor component form a water flow sensor (8 c); the filter cartridge (4) is arranged in the upper cavity (10) and is integrally tubular, the peripheries of two ports of the filter cartridge are respectively provided with an outward-protruding O-shaped ring sealing structure (4 a), the O-shaped ring sealing structures (4 a) are in sealing fit with the inner wall of the upper cavity (10), an annular water purifying cavity (4 b) is formed between the two O-shaped ring sealing structures (4 a), the water purifying cavity (4 b) is communicated with a water purifying outlet (10 c), a raw water inlet (4 c) is formed in one side surface of the upper port of the filter cartridge (4), the raw water inlet (4 c) is in sealing insertion fit with the front end of the water inlet connector (10 b), and a filter screen (4 d) is arranged on the inner wall of the filter cartridge below the raw water inlet (4 c); the decontamination wiping part (6) is arranged on a central axis in the filter cylinder (4), a plurality of flexible wiping strips or bristles are arranged on the outer surface of the decontamination wiping part and attached to the surface of the filter screen (4 d), a rotating connecting rod (12) is arranged at the center of the top cover (3 b) and forms dynamic sealing fit with the top cover, the lower end of the rotating connecting rod (12) is connected with the upper end of the decontamination wiping part (6), the upper end of the rotating connecting rod (12) is connected with the speed reducing motor (5) arranged on the top cover (3 b), and the speed reducing motor (5) can drive the decontamination wiping part (6) to rotate in the filter cylinder (4); a water return connecting port (11 a) is arranged on the same side of the lower cavity (11) close to the water inlet connecting port (10 a), a water return inlet (11 b) is arranged on the other side corresponding to the water return connecting port (11 a), a second electric ball valve (9) is arranged at the position of the water return inlet (11 b), a magnetic water flow rotor assembly (8 a) is arranged in an inner cavity of a water inlet or a water outlet of the second electric ball valve (9), a Hall sensor (8 b) is arranged on the outer wall of a valve body corresponding to the magnetic water flow rotor assembly (8 a), and the magnetic water flow rotor assembly and the Hall sensor form a water flow sensor (8 c); the Hall sensor (8 b) is connected to an electronic controller (13), and the electronic controller (13) controls the cooperative operation of the first electric ball valve (8), the second electric ball valve (9) and the speed reducing motor (5).

2. The water floor heating protection device according to claim 1, wherein the differential pressure bypass valve core assembly (7) is mounted on the bottom cover (3 c) to form a combination, wherein one end of an adjusting rod of the differential pressure bypass valve core assembly (7) extends out of the bottom cover (3 c), the differential pressure setting adjustment can be performed on the differential pressure bypass valve core assembly (7) through the adjusting rod, when the differential pressure between the upper cavity (10) and the lower cavity (11) exceeds a set value, a sealing gasket at the top end of the differential pressure bypass valve core assembly (7) is separated from the valve seat (3 d), water in the upper cavity (10) flows into the lower cavity (11), and then is discharged through the backwater connecting port (11 a).

3. A floor heating protection device according to claim 1, characterized in that the main valve body portions of the first electric ball valve (8) and the second electric ball valve (9) and the main housing (3 a) are of an integral structure.

4. A floor heating protection device according to claim 1, characterized in that the main valve body portions of the first electric ball valve (8) and the second electric ball valve (9) and the main housing (3 a) are of an integral structure, the first electric ball valve (8) and the second electric ball valve (9) share one electric actuator, the main valve bodies of the first electric ball valve and the second electric ball valve are communicated through a tubular part (14), a transmission rod (15) is arranged in the tubular part (14), the upper end of the transmission rod (15) is connected to the ball valve core of the first electric ball valve (8), the lower end of the electric actuator is connected to a spherical valve core of a second electric ball valve (9), the electric actuator arranged at the top of the first electric ball valve (8) drives the first electric ball valve (8) to be opened and closed, the transmission rod (15) synchronously drives the second electric ball valve (9) to be opened and closed.

5. A floor heating protection device as claimed in claim 1, characterized in that an O-ring is provided on the front end periphery of the water inlet connector (10 b) and forms a sealing insertion fit with the inner wall of the raw water inlet (4 c) at the upper end of the filter cartridge (4).

6. A floor heating protection device according to claim 1, characterized in that the floor heating protection device (1) further comprises a decorative outer shell (16), and the decorative outer shell (16) comprises a section shell (16 a) and plastic covers (16 b) arranged at two ports of the section shell (16 a).

7. A floor heating protection device according to claim 1, characterized in that the water flow sensor (8 c) can reflect the change of the water flow, and convert the dynamic change of the water flow into a pulse signal through the hall sensor (8 b) and feed back the pulse signal to the electronic controller (13), the water flow sensor (8 c) in the first electric ball valve (8) and the second electric ball valve (9) have the same specification, under normal conditions, the water flow entering and exiting the floor heating pipe network system is equivalent, when the water flow sensor (8 c) in the first electric ball valve (8) and the water flow sensor (8 c) in the second electric ball valve (9) have a difference value, and when the difference value reaches a set parameter value, the water leakage of the floor heating pipe network is determined, and the difference signal is sent to the first electric ball valve (8) and the second electric ball valve (9) as a set instruction, and the two electric ball valves are shut down through the electric actuator.

8. A floor heating protection device as claimed in claim 1, characterized in that a first temperature sensor mounting port (3 e) is provided on the outer side wall of the upper cavity (10), a second temperature sensor mounting port (3 f) is provided on the outer side wall of the lower cavity (11) or on the bottom cover (3 c), a temperature sensor (17) is installed in the first temperature sensor mounting port (3 e) and the second temperature sensor mounting port (3 f), the temperature sensor (17) is connected to the electronic controller (13), and the water inlet temperature and the water return temperature are controlled by the electronic controller (13).

9. A floor heating protection device according to claim 1, characterized in that the side of the valve seat (3 d) facing the upper cavity (10) is provided with a polygonal protrusion (3 g), the lower end of the filter cartridge (4) is sleeved on the polygonal protrusion (3 g), and the lower end of the filter cartridge (4) is polygonal and matched with the polygonal protrusion (3 g).

10. A floor heating protection device as claimed in claim 1, characterized in that the first electric ball valve (8), the second electric ball valve (9) and the return water connection port (11 a) are all provided with internal thread structures, and each has a conversion joint (18) matched with the internal thread structure.