CN217602957U - Centrifugal fan and heat pump water heater - Google Patents

Abstract

The utility model discloses a centrifugal fan and heat pump water heater. The centrifugal fan includes: the volute comprises a first volute and a second volute, an air suction opening is formed in the first volute, a mounting groove is formed in the inner wall of the second volute, and the first volute and the second volute are buckled together to form an air outlet; the centrifugal fan blade comprises a motor and fan blades arranged on the shaft of the motor, and the motor is arranged in the mounting groove. The centrifugal fan can be conveniently and quickly assembled, the volume of the centrifugal fan is reduced, and the requirement of the compact structure design of the heat pump water heater is met.

Description

Centrifugal fan and heat pump water heater

Technical Field

The utility model belongs to the technical field of domestic appliance, especially, relate to a centrifugal fan and heat pump water heater.

Background

At present, a water heater is a household appliance commonly used in daily life. The water heater is generally divided into an electric water heater, a gas water heater and a heat pump water heater, and the heat pump water heater is widely popularized and used due to high energy efficiency.

The heat pump water heater generally comprises a heat pump unit and a water tank, wherein the heat pump unit comprises a compressor, an evaporator and a fan, and the water tank generally comprises a tank shell, an inner container and a condenser. Wherein, the fan is used for the evaporimeter in the use ventilation heat transfer. The centrifugal fan is widely popularized and used due to small volume and high efficiency. The centrifugal fan generally includes a volute, a fan blade and a motor, wherein the fan blade can rotate in the volute, and the motor is disposed outside the volute and is used for driving the fan blade to rotate. In order to meet the requirement of installing and fixing the motor, a bracket is usually configured outside the volute to install the motor, which results in a complex assembly process and a large volume.

In view of this, how to design a technology for simplifying the assembling process and reducing the volume of the centrifugal fan to meet the requirement of the compact structure design of the heat pump water heater is the technical problem to be solved by the utility model.

SUMMERY OF THE UTILITY MODEL

The utility model provides a centrifugal fan and heat pump water heater realizes making things convenient for the swift equipment of centrifugal fan and dwindles centrifugal fan's volume to realize the requirement of heat pump water heater compact structure design.

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

in one aspect, the present invention provides a centrifugal fan, comprising:

the volute comprises a first volute and a second volute, an air suction opening is formed in the first volute, a mounting groove is formed in the inner wall of the second volute, and the first volute and the second volute are buckled together to form an air outlet;

the centrifugal fan blade comprises a motor and fan blades arranged on a motor shaft, and the motor is arranged in the mounting groove.

Through set up the mounting groove in the second spiral case for the motor is built-in the inside of spiral case, like this, alright with need not additionally to increase the support and install the motor. Utilize the mounting groove to install the motor, on the one hand can reduce to increase the support and cause manufacturing cost's increase, on the other hand, embeds the motor in the spiral case, can effectually reduce centrifugal fan's whole volume, realizes making things convenient for centrifugal fan swift equipment and dwindle centrifugal fan's volume to realize the requirement of the compact structure design of heat pump water heater.

In an embodiment of the present application, the inlet scoop with the mounting groove is just to arranging, the cross-section of mounting groove is circular, the central line of mounting groove with the central line collineation setting of inlet scoop.

In an embodiment of the present application, the second scroll case is provided with a protrusion protruding toward the outside, and the mounting groove is formed in the protrusion.

In one embodiment of the application, a first reinforcing rib is arranged on the bottom surface of the groove, opposite to the motor, of the mounting groove.

In an embodiment of the present application, the outer surface of the second scroll casing is provided with a plurality of second reinforcing ribs around the protruding portion.

In an embodiment of the present application, an outer surface of the second scroll casing is provided with a reinforcing ring protruding outward around the protruding portion, and the second reinforcing ribs are arranged in a staggered manner with the reinforcing ring. The outer surface of the second volute is provided with a plurality of layers of the reinforcing rings around the protruding portion.

In an embodiment of the present application, the protruding portion is further provided with a wire passing hole, and a power line of the motor passes through the wire passing hole. The outer surface of the second volute is also provided with a hook used for positioning a power line of the motor.

In one embodiment of the application, mounting groove's lateral wall is provided with the step face, be provided with the fixed orifices on the step face, the outer periphery of motor is provided with the linking arm of outside extension, the linking arm passes through the fix with screw on the fixed orifices.

An embodiment of the utility model provides a heat pump water heater is still provided, include:

a machine shell, a clapboard is arranged in the machine shell and divides the machine shell into a first mounting cavity and a second mounting cavity, an air inlet and an air outlet which are communicated with the first mounting cavity are arranged on the machine shell,

the water heater comprises a liner, wherein a water inlet pipe and a water outlet pipe are arranged on the liner, and the liner is used for storing water to be heated;

the refrigeration unit comprises a compressor, a condenser, a throttling device and an evaporator which are connected together;

the centrifugal fan is adopted;

wherein, the inner bag sets up in the second installation cavity, the condenser sets up be used for heating on the inner bag water in the inner bag, the compressor the evaporimeter with centrifugal fan is located in the first installation cavity and sets up on the baffle, centrifugal fan's inlet scoop with the evaporimeter is arranged relatively, centrifugal fan's air exit with the air outlet is connected.

In one embodiment of the present application, the partition plate is provided with a guide mounting portion; the spiral case of the centrifugal fan is provided with a positioning installation part, the guiding installation part is matched with the positioning installation part in an inserting mode, and the guiding installation part is configured to guide the positioning installation part to be inserted and installed in the guiding installation part in a sliding mode.

Through set up the location installation department on centrifugal fan's spiral case, it is corresponding, be provided with the direction installation department on the baffle, centrifugal fan passes through location installation department and direction installation department cooperation fixed mounting on the baffle, and to location installation department and direction installation department, the direction installation department can lead the location installation department when installing centrifugal fan, so that the location installation department can slide and accurate grafting together along the direction installation department, thus, on the one hand, can ensure that centrifugal fan can accurate installation target in place, on the other hand can make centrifugal fan's air exit and the accurate alignment of air outlet, realize that the swift accurate equipment of centrifugal fan targets in place, in order to improve the equipment precision and improve the product percent of pass.

Drawings

In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is one of the schematic structural diagrams of the heat pump unit of the present invention;

FIG. 2 is a schematic view of a partial structure of the heat pump unit of the present invention;

FIG. 3 is a second schematic view of a partial structure of the heat pump unit of the present invention;

fig. 4 is a schematic structural view of the centrifugal fan of the present invention;

fig. 5 is an exploded view of the centrifugal fan of the present invention;

FIG. 6 is a second schematic structural view of the heat pump unit of the present invention;

fig. 7 is one of the schematic structural views of the water leakage preventing device of the present invention;

fig. 8 is a second schematic structural view of the water leakage preventing device of the present invention;

FIG. 9 isbase:Sub>A sectional view taken along line A-A of FIG. 8;

FIG. 10 is a sectional view taken along line B-B of FIG. 8;

FIG. 11 is an enlarged view of a portion of the area C in FIG. 9;

fig. 12 is a schematic structural view of a first water pipe of the present invention;

fig. 13 is a cross-sectional view of a first water pipe of the present invention;

fig. 14 is a schematic structural view of a second water pipe of the present invention;

fig. 15 is a sectional view of a second water pipe of the present invention;

fig. 16 is a schematic structural view of the pressure on-off valve of the present invention;

fig. 17 is an exploded view of the pressure on/off valve of the present invention;

figure 18 is a cross-sectional view of the flexible sealing member of the present invention.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model provides a heat pump water heater, it includes heat pump set and water tank usually. The heat pump unit comprises a shell, and a compressor, an evaporator, a throttling device, a centrifugal fan and other components which are arranged in the shell, and the water tank comprises a tank shell, an inner container and a condenser.

The compressor, the evaporator, the throttling device and the condenser are connected to form a refrigerant circulating flow path, and the water in the inner container is heated by utilizing the principle of a heat pump. The above is the basic configuration of the conventional heat pump water heater, and is not limited and described herein.

As shown in fig. 1 to 5, the integral heat pump water heater provided by the present embodiment includes:

the air conditioner comprises a machine shell 1, wherein a partition plate 4 is arranged in the machine shell 1, the partition plate divides the machine shell into a first installation cavity and a second installation cavity, an air inlet 1001 and an air outlet 1002 which are communicated with the first installation cavity are formed in the machine shell 1, and a guide installation part 41 is arranged on the partition plate;

an inner container (not shown) for storing water to be heated;

the refrigerating unit comprises a compressor, a condenser, a throttling device and an evaporator 2 which are connected together;

the centrifugal fan 3 comprises a volute 31 and a centrifugal fan blade 32, wherein the volute 31 is provided with an air suction opening 3001 and an air exhaust opening 3002, the centrifugal fan blade 32 is arranged in the volute 31, and the volute 31 is provided with a positioning installation part 311;

the inner container is arranged in the second mounting cavity, the condenser is arranged on the inner container and used for heating water in the inner container, the compressor, the evaporator and the centrifugal fan are positioned in the first mounting cavity and arranged on the partition plate, the air suction opening 3001 is arranged opposite to the evaporator 2, and the air exhaust opening 3002 is connected with the air outlet 1002; the guide mounting portion 41 is inserted into the positioning mounting portion 311, and the guide mounting portion 41 is configured such that the guide positioning mounting portion 311 is slidably inserted into the guide mounting portion 41.

Specifically, the integrated heat pump water heater is provided with related components in the shell 1, wherein the compressor, the evaporator and the centrifugal fan which are arranged in the first installation cavity form a heat pump unit, and the inner container in the second installation cavity is heated through the condenser.

During assembly, the centrifugal fan 3 is assembled to the partition 4, and the centrifugal fan 3 is connected to the guide mounting portion 41 of the partition 4 through the positioning mounting portion 311 provided on the scroll casing 31. On one hand, the guide mounting part 41 can meet the requirement of connecting, positioning and fixing with the positioning mounting part 311, and on the other hand, the guide mounting part 41 can guide the positioning mounting part 311 to be accurately assembled in place, so that the assembling precision is improved.

Like this, after assembling centrifugal fan 3 on baffle 4, location installation department 311 can improve centrifugal fan 3's equipment position accuracy nature with the cooperation of direction installation department 41 to make things convenient for the quick accurate installation of assembly personnel scene, and, after centrifugal fan 3 assembles the position, make centrifugal fan 3's air exit 3002 can with the alignment that the air outlet 1002 is more accurate.

Through set up the location installation department on centrifugal fan's spiral case, it is corresponding, be provided with the direction installation department on the baffle, centrifugal fan passes through location installation department and direction installation department cooperation fixed mounting on the baffle, and to location installation department and direction installation department, the direction installation department can lead the location installation department when installing centrifugal fan, so that the location installation department can slide along the direction installation department and accurate grafting together, thus, on the one hand, can ensure that the installation that centrifugal fan can be accurate targets in place, on the other hand can make centrifugal fan's air exit and the accurate alignment of air outlet, realize that swift accurate equipment of centrifugal fan targets in place, in order to improve the equipment precision and improve the product percent of pass.

In an embodiment of the present application, the casing further includes a first casing 1005 and a second casing 1006, the partition is disposed between the first casing and the second casing, and the first casing is provided with the air inlet and the air outlet.

Specifically, in order to facilitate assembly to form an integrated structure, the casing is designed to be split, and the first casing 1005 and the second casing 1006 are connected together through the partition.

In an embodiment of the present application, two positioning installation portions 311 are disposed at the bottom of the volute casing 31, and a guiding installation portion 41 corresponding to the positioning installation portions 311 is disposed on the partition board 4.

Specifically, in order to improve the connection reliability, two positioning mounting portions 311 are arranged at the bottom of the scroll casing 31, and the two positioning mounting portions 311 can support the entire scroll casing 31 at the bottom; in addition, during the assembly process, the guide mounting parts 41 correspondingly configured on the partition board 4 can guide and fix the positioning mounting part 311 on the volute casing 31 in a distributed manner, so as to improve the assembly accuracy more accurately.

In some embodiments, after the positioning and mounting portion 311 and the guide mounting portion 41 are inserted into place, in order to more firmly and reliably fasten the scroll casing 31 and the partition plate 4, the scroll casing 31 is provided with a mounting hole 312 penetrating through the positioning and mounting portion 311, and the guide mounting portion 41 is provided with a threaded hole (not shown), and a screw passes through the mounting hole 312 and is screwed in the threaded hole.

Specifically, in the actual assembly process, the assembling person first pre-assembles the centrifugal fan 3 to the partition plate 4 by the positioning and mounting portion 311 and the guide mounting portion 41 being engaged with each other. Then, screws are passed through the mounting holes 312 from the side of the volute 31 of the centrifugal fan 3 and screwed in the threaded holes.

Like this, further fasten centrifugal fan 3 and baffle 4 through the screw, more be favorable to improving the connection reliability between the two, and then reduce the phenomenon emergence that causes centrifugal fan 3 to drop because of fixed inefficacy. Meanwhile, for the centrifugal fan 3 with the position adjusted, the requirement that the air outlet 3002 and the air outlet 1002 are well matched can be always kept.

In an embodiment of the present application, the concrete entities of the positioning mounting portion 311 and the guiding mounting portion 41 may adopt various structural forms, which are exemplified below with reference to the drawings.

The guide mounting part 41 is a first positioning protrusion arranged on the partition board 4, the positioning mounting part 311 is a first positioning groove arranged on the partition board 4, and the first positioning protrusion is inserted into the corresponding first positioning groove.

Specifically, the guide mounting portion 41 is inserted into the positioning mounting portion 311 to complete the insertion fitting of the two. During the assembly process, the volute casing 31 is matched with the first positioning protrusion below through the first positioning groove arranged on the two sides of the bottom of the volute casing. The first positioning protrusion is inserted into the corresponding first positioning groove, and in the process that the first positioning protrusion is inserted into the first positioning groove, the first positioning protrusion and the first positioning groove can be matched with each other to play a role in guiding the volute casing 31 to be preassembled in place.

In one embodiment, two first positioning protrusions are arranged in an inclined manner relative to each other.

Specifically, two first positioning protrusions are obliquely arranged towards the middle position of the two first positioning protrusions, and the obliquely arranged first positioning protrusions have a self-positioning guiding function, so that after the volute casing 31 is assembled in place, high accuracy is achieved.

The included angle of the outer side walls of the two first positioning bulges ranges from 30 degrees to 60 degrees. Therefore, the volute casing 31 can be better pre-positioned and centrally assembled by the two first positioning protrusions, and the assembly efficiency and the assembly precision can be improved.

In some embodiments, the inner wall of the first positioning groove near the outer side forms an inclined surface matched with the outer side wall of the first positioning protrusion.

Specifically, for the volute casing 31, the first positioning groove forms an inclined surface matched with the first positioning protrusion, and the inclined surface is matched with the outer side wall of the first positioning protrusion, so that the functions of guiding and positioning can be better achieved.

In another embodiment, the cross-sectional area of the first positioning protrusion is gradually reduced along the direction away from the partition plate 4, the first positioning groove forms a bell mouth structure, and the inner contour of the first positioning groove is matched with the outer contour of the first positioning protrusion.

Specifically, the first positioning groove forms a trapezoidal notch structure, and for the first positioning protrusion, the top of the first positioning protrusion is smaller, so that the first positioning protrusion can be easily inserted into the first positioning groove in an aligned manner by an assembling person. The size of the bottom of the first positioning protrusion is larger, so that the first positioning protrusion and the first positioning groove can be assembled together in a more matched manner after the scroll casing 31 is assembled in place.

Wherein, in order to reduce the influence that parts machining and installation error caused, to form certain clearance between first positioning arch and the first positioning recess. After the volute casing 31 is pre-positioned and assembled through the matching of the first positioning protrusion and the first positioning groove, fine adjustment can be performed according to the requirement of the alignment connection of the air outlet 3002 and the air outlet 1002 of the worm wheel, so that the air outlet 3002 and the air outlet 1002 can be aligned and accurately butted together. And the first positioning groove forms a notch with a trapezoidal structure, so that the value range of the gap is 5% -10% of the length of the upper bottom of the trapezoid formed by the first positioning groove. By the design, when the volute 31 is fixed, the adjustment freedom degree is provided in the direction, so that the problem that the air outlet 3002 of the volute 31 is not aligned with the air outlet 1002 of the machine shell 1 is solved.

In another embodiment of the present application, the guide mounting portion 41 is a second positioning groove provided on the partition plate 4, and the positioning mounting portion 311 is a second positioning protrusion provided on the partition plate 4, the second positioning protrusion being inserted into the corresponding second positioning groove.

Specifically, the volute casing 31 may be configured with a protruding second positioning protrusion and inserted into the second positioning groove configured on the partition plate 4 to achieve the pre-assembly positioning.

In one embodiment of the present application, the end of the volute 31 away from the positioning and mounting portion 311 is provided with a flanging structure 313, the flanging structure 313 is lapped on the evaporator 2, and the evaporator 2 is located between the flanging structure 313 and the partition plate 4.

Specifically, in addition to the assembly and cooperation of the volute 31 and the partition plate 4, the top of the volute 31 is also assembled and connected with the evaporator 2 through the extended flanging structure 313 on one side thereof. The burring structure 313 overlaps the evaporator 2 to support the top of the scroll 31 by the evaporator 2.

More importantly, the volute 31 is attached to the evaporator 2 and covers the leeward side of the evaporator 2, so that the negative pressure generated by the air inlet 3001 of the volute 31 acts on the entire leeward side of the evaporator 2 to fully utilize the heat exchange area of the evaporator 2 to exchange heat with air.

In one embodiment, extension plates 314 may be respectively disposed at both sides and the bottom of the scroll casing 31, and the extension plates 314 extend toward the corresponding side or bottom of the evaporator 2 and abut against the evaporator 2. The volute casing 31 and the evaporator 2 are spaced by the extension plate 314 and form a negative pressure cavity therebetween, after the centrifugal fan blade 32 rotates, negative pressure is formed in the negative pressure cavity, and air can be uniformly fed from the air inlet surface of the whole surface of the evaporator 2 under the action of the negative pressure formed by the negative pressure cavity, so that the evaporator 2 can uniformly exchange heat, and further the heat exchange efficiency is improved.

In the second embodiment, as shown in fig. 4 and 5, for the volute 31, it is required to meet the requirement of installing the centrifugal fan 32, and the centrifugal fan 32 generally includes the motor 321 and the fan blade 322 disposed on the shaft of the motor 321, in order to meet the requirement of installing the motor 321 inside the volute 31, the volute 31 includes a first volute 3101 and a second volute 3102, the first volute 3101 is provided with an air suction opening 3001, the inner wall of the second volute 3102 is provided with an installation groove 3003, and the first volute 3101 and the second volute 3102 are buckled together to form an air outlet 1002; the motor 321 is disposed in the mounting groove 3003, and the fan blades 322 are located between the first and second volutes 3101 and 3102 and cover the air suction opening 3001.

Specifically, the installation groove 3003 is provided in the second scroll 3102, so that the motor 321 is embedded in the inner wall of the scroll 31, and thus, the motor 321 can be installed without an additional bracket. The installation groove 3003 is used for installing the motor 321, so that on one hand, the increase of the manufacturing cost caused by the increase of the support can be reduced, and on the other hand, the motor 321 is arranged in the volute 31, so that the whole volume of the centrifugal fan 3 can be effectively reduced.

In some embodiments, the air suction opening 3001 is disposed opposite to the mounting groove 3003, the mounting groove 3003 has a circular cross section, and a center line of the mounting groove 3003 is collinear with a center line of the air suction opening 3001.

Specifically, for the mounting groove 3003, the mounting groove is disposed opposite to the air suction opening 3001, so that the suction force generated by the fan blade 322 can utilize the opening degree of the air suction opening 3001 to achieve air suction to the maximum extent, thereby improving the air supply capacity.

In another embodiment, the second scroll 3102 is provided with a protrusion 3004 protruding toward the outside, and the mounting groove 3003 is formed in the protrusion 3004.

Specifically, by forming the protrusion 3004 on the second scroll 3102, the mounting groove 3003 is formed on the inner wall of the second scroll 3102 by the protrusion 3004, so as to meet the requirement that the motor 321 is built inside the scroll 31. Meanwhile, forming the mounting groove 3003 in the protrusion 3004 may reduce the influence of the inside of the scroll case 31 on the rotation of the fan blades 322 due to the mounting of the motor 321.

In an embodiment, the first rib 3005 is disposed on the bottom surface of the mounting groove 3003 opposite to the motor 321, and the first rib 3005 can reinforce the structural strength of the mounting groove 3003 on the inner wall of the second volute 3102 to meet the mounting requirement of the motor 321.

In another embodiment, the outer surface of the second scroll 3102 is provided with a plurality of second reinforcing ribs 30063006 around the projection 3004. By providing a plurality of second reinforcing ribs 3006 on the outer surface of the second scroll 3102, the overall structural strength of the second scroll 3102 can be enhanced to support the supporting force required for the operation of the motor 321 in the second scroll 3102.

Wherein, in order to further enhance the overall structural strength of the second volute 3102, the outer surface of the second volute 3102 is provided with a reinforcing ring 3007 protruding outward around the protrusion 3004, and the second reinforcing ribs 3006 are arranged alternately with the reinforcing ring 3007. The reinforcement ring 3007 cooperates with the second reinforcement rib 3006 to increase the structural strength of the periphery thereof around the projection 3004. And, as necessary, the outer surface of the second scroll 3102 is provided with a multi-layered reinforcement ring 3007 around the projection 3004.

In other embodiments, since the motor 321 is built in the volute casing 31, in order to facilitate connection of the power line of the motor 321 with an external electronic control board, a wire through hole 3008 may be further disposed on the protrusion 3004, and the power line of the motor 321 passes through the wire through hole 3008. In order to facilitate the wiring layout, a hook 3009 for positioning a power line of the motor 321 is further disposed on an outer surface of the second volute 3102, and the power line of the motor 321 is output from the inside of the volute 31 through the wire passing hole 3008 and hung on the hook 3009 to facilitate the wiring installation.

In some embodiments, in order to securely and reliably mount and fix the motor 321, the side wall of the mounting recess 3003 is provided with a stepped surface (not numbered) on which a fixing hole is provided, and the outer circumferential ring of the motor 321 is provided with an outwardly extending coupling arm 323, and the coupling arm 323 is fixed to the fixing hole by a screw.

Specifically, the end of the motor 321 is inserted into the mounting groove 3003, and the connecting arm 323 extending from the outer periphery of the motor 321 is fixedly connected to the fixing hole on the step surface by a bolt, so as to ensure that the motor 321 can be firmly fixed on the second scroll 3102.

In the third embodiment, as shown in fig. 6 to 18, an inner container is disposed in the casing 1 in an embodiment of the present invention, and the inner container is provided with a water inlet pipe 1003 and a water outlet pipe 1004, and the inner container is used for storing water to be heated.

Wherein, in order to improve the leak protection water performance of water tank, split type heat pump water heater still includes leak protection water installation 3000, and it includes:

the water pipe comprises a first water pipe 100, wherein the first water pipe 100 is provided with a first water inlet pipe head 101, a first pipe head 102 and a first water outlet pipe head 103, a first connecting flow passage 104 is further arranged in the first water pipe 100, a first port of the first connecting flow passage 104 is communicated with the first water inlet pipe head 101, and a second port of the first connecting flow passage 104 is communicated with the first water outlet pipe head 103;

the second water pipe 200 is provided with a second water inlet pipe head 201, a second pipe connecting head 202 and a second water outlet pipe head 203 which are communicated with each other, the second water inlet pipe head 201 is provided with a one-way valve 208, and the one-way valve is used for controlling water flow to flow into the second water pipe 200 from the second water inlet pipe head 201 in a one-way manner;

a pressure on-off valve 300, the pressure on-off valve 300 being provided in the first connector head 102 and being used to switch the second port of the first connection flow path 104 according to the water pressure at the first connector head 102;

and a connection tube 400, the connection tube 400 being connected between the first connector head 102 and the second connector head 202.

Specifically, the water tank 1000 includes a cabinet and a liner disposed in the cabinet 1, and a water inlet pipe 1003 and a water outlet pipe 1004 are disposed on the liner. The water leakage preventing device 3000 mainly includes a first water pipe 100, a second water pipe 200, a pressure on-off valve 300, and a connection pipe 400.

The first water inlet pipe head 101 of the first water pipe 100 is configured to be connected to an external water supply pipe to introduce tap water into a municipal pipe network, and the first water outlet pipe head 103 of the first water pipe 100 is connected to a water tank inlet pipe 1003 of a user's home to allow tap water to be delivered into the water tank.

The second water inlet pipe head 201 of the second water pipe 200 is used for connecting with the water outlet pipe 1004 of the water tank, so that the water heated in the water tank is output. The second outlet pipe head 203 of the second water pipe 200 is connected with a water using terminal in the home of the user to realize the final output of water.

The first and second water pipes 100 and 200 are connected by a connection pipe 400, so that the first and second connector heads are connected to each other.

The pressure on/off valve 300 of the first connector may be operated according to a pressure generated between the water pressure in the first connector and the second port of the first connection flow path 104 to prevent water leakage.

In the process that the user used water through the water end, the second water pipe 200 then passed through this moment the second outlet pipe is connected with the water end and is upwards exported water, and at this moment, the water pressure in the second water pipe 200 is compared in the water pressure reduction that first water inlet pipe head 101 goes out, and meanwhile, first connector owing to through connecting pipe 400 with the second connector intercommunication, and then make the water pressure of first connector department also correspondingly reduces. The water introduced from the first inlet header 101 is outputted through the second top open pressure on/off valve 300 of the first connection flow passage 104 and finally flows into the water tank through the first outlet header 103.

After the user closes the water use terminal, since the tap water pressure of the external water supply pipe is transferred to the second water pipe 200, and the water pressure of the first connector is gradually increased and finally identical to the water pressure of the first water inlet connector 101, the pressure on-off valve 300 is automatically reset to close the second port of the first connection flow passage 104.

At this time, if the inner container in the water tank is broken and leaks water, since the second water inlet pipe head 201 of the second pipe is provided with the check valve, the water leakage occurs at the water end, the change of the water pressure in the second pipe is not caused, and the pressure on-off valve 300 is always in the state of closing the second port of the first connecting flow passage 104, and finally, the serious leakage caused by the input of tap water into the water tank is avoided under the condition that the inner container in the water tank is damaged.

Through dispose the pressure on-off valve in first water pipe, the pressure on-off valve is built-in first water pipe completely, first water pipe is connected through first water pipe head and delivery pipe (water pipe) in the user's house, first water pipe and second water pipe are installed respectively on the water tank in the user's house, the water tank is under the user state, the water that first water pipe introduced is exported from the second water pipe after the water tank is handled, at this moment, because first connecting pipe head of connecting pipe intercommunication and second connecting pipe head, the water pressure in the first connecting pipe head is less than the water pressure in the first water pipe head, at this moment, the pressure on-off valve then opens the port two of first connecting runner to make first water pipe head and first water pipe head communicate and realize supplying water. When the water tank is in a water-off state, the water pressure in the first water pipe and the water pressure in the second water pipe are gradually the same, so that the water pressure in the first water inlet pipe head and the water pressure in the first connecting pipe head are balanced, and at the moment, the pressure on-off valve automatically resets and closes the second port of the first connecting flow channel; under the inside condition that takes place to leak of water tank, because the second head of intaking is provided with the check valve for the water pressure in first head of intaking and the first head still maintains balanced state, and then ensures that the delivery pipe can not follow the outside output water of first water pipe, realizes reducing the use reliability that takes place to leak the accident in order to improve electrical apparatus.

In some embodiments, the pressure on-off valve 300 relies primarily on the difference in water pressure between the first water inlet stub 101 and the first connector stub to achieve mechanical on-off control.

To this end, the pressure on-off valve 300 may include a spring 301 and a flexible sealing member 302, the flexible sealing member 302 being disposed in the first connector head 102 and serving to open and close the second port of the first connection flow passage 104, the spring 301 being disposed in the first connector head 102 and serving to apply an elastic force to the flexible sealing member 302 in a direction toward the second port of the first connection flow passage 104.

Specifically, the flexible sealing member 302 is disposed opposite to the second port of the first connection flow path 104 and is used to block the second port of the first connection flow path 104. The two sides of the flexible sealing member 302 in the first connector head are respectively acted by water pressure in different pipe heads, so as to realize deformation according to different pressure differences, and further open and close the second port of the first connection flow channel 104.

In the process that the user uses water through the water terminal, the water pressure in the first connector head is reduced, under the action of the water pressure at the second port of the first connection flow passage 104, the flexible sealing part 302 is deformed to open the second port of the first connection flow passage 104, and the water entering the first water pipe 100 from the first water inlet head 101 is output from the second port of the first connection flow passage 104 and finally flows into the water tank from the first water outlet head 103.

When the user closes the water use terminal and stops using water, the water pressure in the first connector head gradually rises to gradually offset the water pressure generated by the second port of the first connection flow channel 104, and under the action of the spring 301, the flexible sealing member 302 deforms toward the second port of the first connection flow channel 104 and finally blocks the second port of the first connection flow channel 104.

In some embodiments, in order to facilitate mounting of the flexible sealing member 302, the flexible sealing member 302 is formed with a sealing part 3021, an elastic deformation part 3022, and a mounting fixing part 3023, the elastic deformation part 3022 being connected between the sealing part 3021 and the mounting fixing part 3023, the sealing part 3021 being disposed opposite to the second port of the first connecting flow passage 104, and the mounting fixing part 3023 being provided on the inner wall of the first connector housing 102.

Specifically, the sealing portion 3021 formed by the flexible sealing member 302 is used for sealing the second port of the first connection flow channel 104, the elastic deformation portion 3022 is used for meeting the requirement that the sealing portion 3021 can open and close the second port of the first connection flow channel 104 under different water pressures, and the mounting fixing portion 3023 is used for being mounted in the first connector head.

In some embodiments, the pressure cut-off valve 300 further includes a mounting support 303, the mounting support 303 being disposed in the first connector head, and a spring 301 being disposed between the mounting support 303 and the sealing part 3021, the spring 301 for applying an elastic force to the sealing part 3021 in a direction toward the second port of the first connection flow passage 104.

Specifically, in order to facilitate the installation of the spring 301 in the first connector head, the installation support 303 may be disposed in the first connector head by using a threaded connection, an interference fit, or the like, and the spring 301 may be supported by the installation support 303, so that the spring 301 may provide an effective elastic force to the sealing portion 3021.

The mounting support 303 comprises an outer sleeve 3031 and an inner sleeve 3032, the outer sleeve 3031 is sleeved outside the inner sleeve 3032, and a water flow channel 3033 is formed between the outer sleeve 3031 and the inner sleeve 3032; the outer sleeve 3031 is threaded into the first connector head and the spring 301 is disposed in the inner sleeve 3032.

Specifically, when assembled, the outer sleeve 3031 is threadedly mounted in the first connector housing, and since the outer sleeve 3031 and the inner sleeve 3032 are connected to each other, the mounting spring 301 can be supported by the inner sleeve 3032.

The inner sleeve 3032 may be suspended in the outer sleeve 3031 by a connecting rod between the outer sleeve 3031 and the inner sleeve 3032, thereby forming a water flow channel 3033.

The water flow channel 3033 can ensure that the water pressure in the connecting pipe 400 is directly transmitted to the flexible sealing part 302, so as to ensure that the water path is smooth and ensure that the water pressure can be accurately transmitted.

In some embodiments, to fixedly mount the flexible sealing member 302, the first water pipe 100 is provided with a mounting ring 105 therein, and the mounting fixture 3023 is sandwiched between the mounting ring 105 and the outer sleeve 3031.

Specifically, a mounting ring 105 is provided on the inner wall of the first water pipe 100 on the side of the first connection flow passage 104, and the mounting ring 105 is engaged with the outer sleeve 3031 to fix the flexible sealing member 302.

During assembly, the flexible sealing member 302 is placed into the first connector block and against the mounting ring 105, and then the outer sleeve 3031 is inserted into the first connector block, with the outer sleeve 3031 in place such that the mounting fixture 3023 is sandwiched between the mounting ring 105 and the outer sleeve 3031 to achieve a secure, fixed mounting of the flexible sealing member 302.

In some embodiments, an adjustment member 304 is also disposed within the inner sleeve 3032, the adjustment member 304 being threaded within the inner sleeve 3032 and abutting the spring 301.

Specifically, there is a certain difference in water pressure of water supply networks in different regions, and for this reason, the elastic force generated by the spring 301 to the flexible sealing member 302 needs to be correspondingly adjusted according to the local water pressure, so as to ensure that the flexible sealing member 302 can perform a good sealing function on the first connecting flow channel 104.

In the actual use process, when the operator installs at the user's home, before connecting pipe 400 at first water pipe 100 and second water pipe 200, can be through adjusting part 304 to change the deformation volume under the spring 301 initial condition, and then realize satisfying the water pressure requirement of local water supply network. As the adjusting member 304, a threaded member such as a bolt can be preferably used.

And the connection pipe 400 can be connected between the first and second water pipes 100 and 200 after the initial amount of deformation of the spring 301 is adjusted.

In another embodiment, in order to facilitate a user to directly perform a waterway switching operation on the water leakage preventing device, a first auxiliary joint 106 is disposed on the first water pipe 100, a first partition 107 is disposed in the first auxiliary joint 106, a first water inlet (not marked) and a first water outlet (not marked) are disposed on the first partition 107, and a second port of the first connecting flow channel 104, the first water inlet, the first water outlet and the first water outlet pipe head 103 are sequentially connected;

the first auxiliary connector 106 is provided therein with a first on-off valve 108, and the first on-off valve 108 is disposed opposite to the first partition 107 and is used for opening and closing the first water inlet and/or the first water outlet.

Specifically, in the actual use process, when the user needs to completely close the water leakage preventing device, the first switch valve 108 can be operated to operate, the first water inlet and/or the first water outlet are/is switched on and off through the first switch valve 108 to actively control the on/off of the flow path between the first water inlet pipe head 101 and the first water outlet pipe head 103, and then when the water leakage preventing device is completely closed as required, the use reliability is further improved.

The specific structure of the first on-off valve 108 may adopt a valve core structure in a conventional water valve, and is not limited and described herein.

In another embodiment, a second connection flow passage 204 is further disposed in the second water pipe 200, a first port of the second connection flow passage 204 is communicated with the second water inlet pipe head 201, and a second port of the second connection flow passage 204 is respectively communicated with the second water inlet pipe head 202 and the second water outlet pipe head 203.

Specifically, in order to satisfy the requirement of supplying water to both the second outlet pipe head 203 and the second connector head, the second inlet pipe head 201 is provided with a second connection flow passage 204 in the second water pipe 200 to distribute the water flow.

Similarly, in order to completely close the second water pipe 200, a second auxiliary connector 205 is disposed on the second water pipe 200, a second partition 206 is disposed in the second auxiliary connector 205, a second water inlet and a second water outlet are disposed on the first partition 107, a second port of the second connection flow channel 204 is the second water inlet, and the second water outlet is respectively communicated with the second water outlet pipe head 203 and the second connection pipe head; the second auxiliary connector 205 is provided therein with a second on-off valve 207, and the second on-off valve 207 is disposed opposite to the second partition 206 and is used for opening and closing the second water inlet and/or the second water outlet.

Specifically, in the actual use process, when the user needs to completely close the second water pipe 200, the second switch valve 207 can be operated to operate, the second water inlet is opened and closed through the second switch valve 207 and/or the second water outlet is opened and closed so as to actively control the flow path between the second water inlet pipe head 201 and the second water outlet pipe head 203 and the second connecting pipe head, and then the second water pipe is completely closed according to the needs, so that the use reliability is further improved.

The specific structure of the second on-off valve 207 may adopt a valve core structure in a conventional water valve, and is not limited and described herein.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.

Claims (10)

1. A centrifugal fan, comprising:

the volute comprises a first volute and a second volute, an air suction opening is formed in the first volute, a mounting groove is formed in the inner wall of the second volute, and the first volute and the second volute are buckled together to form an air outlet;

the centrifugal fan blade comprises a motor and fan blades arranged on a motor shaft, and the motor is arranged in the mounting groove.

2. The centrifugal fan as claimed in claim 1, wherein the air suction opening is disposed opposite to the mounting groove, the mounting groove has a circular cross-section, and a center line of the mounting groove and a center line of the air suction opening are arranged in a collinear manner.

3. The centrifugal fan as claimed in claim 1, wherein the second scroll is provided with a protrusion protruding toward an outside, the mounting groove being formed in the protrusion.

4. The centrifugal fan as claimed in claim 3, wherein a first reinforcing rib is provided on a bottom surface of the mounting groove opposite to the motor.

5. The centrifugal fan of claim 3 wherein the outer surface of the second volute is provided with a plurality of second ribs around the projection.

6. The centrifugal fan as claimed in claim 5, wherein the outer surface of the second volute is provided with an outwardly protruding reinforcing ring around the protrusion, the second reinforcing ribs are arranged in a staggered manner with the reinforcing ring, and the outer surface of the second volute is provided with a plurality of layers of the reinforcing rings around the protrusion.

7. The centrifugal fan as claimed in claim 3, wherein a wire passing hole is further provided on the protruding portion, the power line of the motor passes through the wire passing hole, and a hook for positioning the power line of the motor is further provided on an outer surface of the second volute.

8. The centrifugal fan as claimed in claim 1, wherein the side wall of the mounting recess is provided with a step surface, the step surface is provided with a fixing hole, the outer circumferential ring of the motor is provided with a connecting arm extending outward, and the connecting arm is fixed to the fixing hole by a screw.

9. A heat pump water heater, comprising:

the air conditioner comprises a machine shell, a partition plate is arranged in the machine shell and divides the machine shell into a first mounting cavity and a second mounting cavity, an air inlet and an air outlet which are communicated with the first mounting cavity are arranged on the machine shell,

the water heater comprises a liner, wherein a water inlet pipe and a water outlet pipe are arranged on the liner, and the liner is used for storing water to be heated;

the refrigeration unit comprises a compressor, a condenser, a throttling device and an evaporator which are connected together;

a centrifugal fan, wherein the centrifugal fan is the centrifugal fan as claimed in any one of claims 1 to 8;

wherein, the inner bag sets up in the second installation cavity, the condenser sets up be used for heating on the inner bag water in the inner bag, the compressor the evaporimeter with centrifugal fan is located in the first installation cavity and sets up on the baffle, centrifugal fan's inlet scoop with the evaporimeter is arranged relatively, centrifugal fan's air exit with the air outlet is connected.

10. The heat pump water heater of claim 9, wherein the partition is provided with a guide mount; the spiral case of the centrifugal fan is provided with a positioning installation part, the guiding installation part is matched with the positioning installation part in an inserting mode, and the guiding installation part is configured to guide the positioning installation part to be inserted and installed in a sliding mode on the guiding installation part.

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