CN111380216A

CN111380216A - Air duct structure

Info

Publication number: CN111380216A
Application number: CN201811608629.9A
Authority: CN
Inventors: 吴剑; 代南海; 王海丽; 刘莉
Original assignee: Qingdao Haigao Design and Manufacturing Co Ltd
Current assignee: Qingdao Haigao Design and Manufacturing Co Ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-07-07
Also published as: WO2020135064A1

Abstract

The invention discloses an air duct structure, and belongs to the technical field of water heaters. The air channel structure comprises a volute, an air guide shell and an exhaust ring, wherein an air outlet end of the volute is communicated with an air inlet end of the air guide shell, and wind blocking sheets are arranged on the edge of the periphery of the volute; the air outlet end of the air guide shell is communicated with the inner arc surface of the exhaust ring; the periphery of the exhaust ring is provided with air guide sheets which are of arc structures and are uniformly bent towards the same side. By adopting the embodiment, the air guide efficiency of the air duct is effectively improved, and the running speed of the fan in the air duct can be properly reduced after the air guide efficiency is improved, so that the purpose of reducing noise is achieved. A heat pump water heater is also disclosed.

Description

Air duct structure

Technical Field

The invention relates to the technical field of water heaters, in particular to an air duct structure.

Background

The heat pump water heater can absorb low-temperature heat in air, gasify fluorine media, then increase pressure and heat after being compressed by the compressor, and then convert the heat into water for heating by the heat exchanger, so that the compressed high-temperature heat energy can heat the water temperature, and the heat pump water heater has the characteristics of high efficiency and energy saving, can produce the same hot water amount which is 4-6 times of that of a common electric water heater, has the annual average heat efficiency ratio which is 4 times of that of electric heating, and has high utilization efficiency.

The main energy of the heat pump water heater is low-temperature heat in the air, so that the heat in the air is obtained, the air is firstly introduced by utilizing the air channel, and the air channel structure with various air inlets is available in the prior art, so that the air guide efficiency is low although the air channel structure can be utilized on the heat pump water heater.

Disclosure of Invention

The embodiment of the invention provides an air duct structure. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

According to a first aspect of embodiments of the present invention, there is provided an air duct structure.

In some optional embodiments, the air duct structure comprises a volute, an air guide shell and an exhaust ring, wherein an air outlet end of the volute is communicated with an air inlet end of the air guide shell, and the periphery of the volute is provided with a wind shield sheet; the air outlet end of the air guide shell is communicated with the inner arc surface of the exhaust ring; the periphery of the exhaust ring is provided with air guide sheets which are of arc structures and are uniformly bent towards the same side.

By adopting the optional embodiment, the installation space of the air duct is divided into two parts by the wind shield sheet, so that the air inlet of the air duct completely comes from the same side, namely, one side provided with the evaporator, and the air flow passes through the evaporator in a centralized manner, so that the air flow circulating in the air duct exchanges energy with the evaporator as much as possible, the air guide efficiency of the air duct is effectively improved, the running speed of a fan in the air duct can be properly reduced after the air guide efficiency is improved, and the purpose of reducing noise is achieved.

Optionally, the volute includes a first volute and a second volute, the first volute is provided with a first volute groove, the centrifugal fan is embedded in the first volute groove, the second volute is provided with a second volute groove, the second volute groove is provided with an air inlet, and the air suction end of the centrifugal fan blade is close to the air inlet. By adopting the optional embodiment, the volute is divided into two parts, so that the interior of the volute is maintained at the later stage, and the centrifugal fan blades correspond to the air inlet, so that the air flow can enter the volute more smoothly.

Optionally, a gas outlet is arranged at a connecting part of the gas outlet end of the gas exhaust ring and the gas guide shell, a gas guide sheet in the gas outlet penetrates through the gas outlet, other parts of the gas exhaust ring except the gas outlet are all of a closed structure, and the gas guide sheet is embedded on the closed structure. By adopting the optional embodiment, the air can be discharged from the half side, and the decorative air guide sheet is directly embedded in the half side without discharging the air, so that the cost can be reduced.

Optionally, one end of the centrifugal fan is embedded into the first volute, the depth of the embedding is half to three-quarters of the depth of the first volute plus the depth of the second volute, the first volute is connected with the second volute in a sealing mode, and the other end of the centrifugal fan is provided with a material which is exposed outside the first volute. Adopt this optional embodiment, with inside the partial embedding of centrifugal fan spiral case, utilize the spiral case to carry out partial isolation to the noise that centrifugal fan produced, reduce the noise, adopt the mounting means of embedding simultaneously, make the structure compacter, reduce the space occupancy.

Optionally, the first volute and the second volute are identical in shape, a sealing groove is formed in the edge of the first volute and the edge of the second volute, or a sealing groove is formed in the edge of the first volute or the edge of the second volute, a sealing strip is arranged in the sealing groove, and the first volute and the second volute are fixed through screws. By adopting the optional embodiment, the first worm groove and the second worm groove which have the same structure are buckled together to form the integral worm groove, and the sealing groove and the sealing strip in the middle of the two parts can ensure the sealing property between the first worm groove and the second worm groove and prevent air leakage.

Optionally, the air guide shell is of a semicircular structure, the arc surface of the air guide shell is an air outlet end, the lower side surface of the air guide shell is an air inlet end, and the direction of the air outlet end of the air guide shell is opposite to that of the air inlet. Adopt this optional embodiment, adopt semicircular structure, guarantee to discharge the air current from half, utilize the air outlet end of wind-guiding shell and air intake opposite direction, can guarantee the air that is discharged by the cooling, can not be inhaled again from the air intake immediately to guarantee that the inspiratory air temperature of air intake is some relatively high, improve the utilization ratio of air temperature energy.

Optionally, the edge of the arc surface of the air guide shell is provided with a guide groove, and the middle of the upper side surface of the air guide shell is provided with a through hole. By adopting the optional embodiment, the reserved guide groove and the reserved through hole are utilized to provide an installation space for the supporting mechanism in the heat pump water heater, and the combination between the whole bodies is convenient.

Optionally, an arc-shaped air guide surface is arranged on one side of the inside of the lower side of the air guide shell, which is opposite to the air outlet end of the volute. Adopt this optional embodiment, dredge the formation of air current to reduce the windage, guarantee that the air current is more smooth and easy.

Optionally, one side of the wind shield is provided with one or more pipeline grooves, and both ends of the lower side of the wind shield are provided with wind shield installation fixing pieces. Adopt this optional embodiment, utilize the wind-break piece installation stationary blade can be with whole wind channel stable in structure's fixing inside heat pump water heater, the pipeline groove then reserves the position of arranging for the inside pipeline of heat pump water heater.

According to a second aspect of embodiments of the present invention, there is provided a heat pump water heater.

In some optional embodiments, a heat pump water heater comprises the air duct structure of any one of the above.

By adopting the optional embodiment, the air duct structure can effectively improve the air guide efficiency of the heat pump water heater.

By adopting the optional embodiment, the wind-blocking sheet arranged on the air channel is utilized to separate the installation space of the wind-blocking sheet, so that the air inlet of the air channel completely comes from the same side, namely, one side of the evaporator is installed, the air flow is concentrated through the evaporator, the air flow circulating in the air channel exchanges energy with the evaporator as much as possible, the wind-guiding efficiency of the air channel is effectively improved, the running speed of the fan in the air channel can be properly reduced after the wind-guiding efficiency is improved, and the purpose of reducing noise is achieved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic block diagram illustrating an alternative embodiment of a heat pump water heater in accordance with an exemplary embodiment;

FIG. 2 is a schematic block diagram illustrating an alternate embodiment of the interior of a heat pump water heater in accordance with an exemplary embodiment;

FIG. 3 is a schematic structural diagram illustrating an alternative embodiment of a lower housing of a heat pump water heater in accordance with an exemplary embodiment;

FIG. 4 is a schematic diagram of an alternative embodiment of a front side shell of a heat pump water heater according to an exemplary embodiment;

FIG. 5 is a schematic diagram of an alternate embodiment of a rear side shell of a heat pump water heater according to an exemplary embodiment;

FIG. 6 is a schematic diagram of an alternative embodiment of an upper housing of a heat pump water heater according to an exemplary embodiment;

FIG. 7 is a schematic diagram illustrating an alternate embodiment of a water tank of a heat pump water heater in accordance with an exemplary embodiment;

FIG. 8 is a schematic diagram illustrating an alternate embodiment of a heat pump of the heat pump water heater according to an exemplary embodiment;

FIG. 9 is a schematic structural view of an alternative embodiment of a support mechanism according to an exemplary embodiment;

FIG. 10 is a top view of a base of a support mechanism shown in accordance with an exemplary embodiment;

FIG. 11 is a top view of a lower load-bearing partition of the support mechanism shown in accordance with an exemplary embodiment;

FIG. 12 is a bottom view of the lower load bearing partition of the support mechanism shown in accordance with one exemplary embodiment;

FIG. 13 is a bottom view of an upper load bearing partition of the support mechanism shown in accordance with an exemplary embodiment;

FIG. 14 is a schematic structural view of an alternative embodiment of a load bearing bar of the support mechanism according to an exemplary embodiment;

FIG. 15 is a schematic structural view of an alternative embodiment of a lower support bar of the support mechanism according to an exemplary embodiment.

FIG. 16 is a schematic structural view of an alternative embodiment of an upper support bar of the support mechanism shown in accordance with an exemplary embodiment;

FIG. 17 is a schematic structural view of an alternative embodiment of a duct structure according to an exemplary embodiment;

FIG. 18 is a planform view of an air duct structure shown in accordance with an exemplary embodiment;

FIG. 19 is a planform view of another orientation of the air duct structure shown in accordance with an exemplary embodiment;

FIG. 20 is a schematic view of an alternative embodiment of a first volute of a duct configuration according to an exemplary embodiment;

FIG. 21 is a schematic view of an alternate embodiment of the second volute of the air duct configuration shown in accordance with an exemplary embodiment;

FIG. 22 is a schematic structural view of an alternative embodiment of a wind scooper of the wind tunnel structure according to an exemplary embodiment;

FIG. 23 is a schematic structural view illustrating an alternative embodiment of a connection relationship between a wind scooper and an exhaust ring of the air duct structure according to an exemplary embodiment;

FIG. 24 is a horizontal planform view of a wind scooper of the wind tunnel structure shown in accordance with an exemplary embodiment;

FIG. 25 is a schematic block diagram of an alternative embodiment of an evaporator shown in accordance with an exemplary embodiment;

FIG. 26 is a schematic block diagram illustrating an alternative embodiment of the arrangement of heat exchange tubes of an evaporator according to one exemplary embodiment;

FIG. 27 is a side view of a heat exchange tube of an evaporator shown in accordance with an exemplary embodiment;

FIG. 28 is a schematic structural view of an alternative embodiment of a U-shaped tube of an evaporator shown in accordance with an exemplary embodiment;

FIG. 29 is a schematic diagram illustrating an alternative embodiment of a heat exchange tube spacer for an evaporator in accordance with an exemplary embodiment;

fig. 30 is a schematic view of an alternative embodiment of a sealing flap for an evaporator according to an exemplary embodiment.

FIG. 31 is a schematic structural view of an alternative embodiment of a centrifugal fan according to an exemplary embodiment;

FIGS. 32, 33, 34 and 35 are schematic structural views of an alternative embodiment of a centrifugal fan blade of the centrifugal fan according to an exemplary embodiment;

FIG. 36 is a schematic structural view of an alternative embodiment of a fan motor of a centrifugal fan, according to an exemplary embodiment.

Detailed Description

The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method or device comprising the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.

The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein, as used herein, are defined as orientations or positional relationships based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections via intermediary media, where the specific meaning of the terms is understood by those skilled in the art as appropriate.

Fig. 1 and 2 show an alternative embodiment of the heat pump water heater.

In this alternative embodiment, a heat pump water heater includes an upper casing 100 mounted with a water tank 101 and a lower casing 200 mounted with a heat pump 201, the upper casing 100 is disposed on the upper side of the lower casing 200, a supporting mechanism 300 is further mounted inside the lower casing 200, and the water tank 101 in the upper casing 100 is fixed on the top end of the supporting mechanism 300.

By adopting the optional embodiment, the water tank 101 is arranged at the upper side, the heat pump 201 which can generate vibration during working is arranged at the lower side, the lower shell 200 provided with the heat pump 201 is pressed by the weight of the water tank 101, the vibration amplitude is suppressed, the purpose of reducing noise is achieved, and the supporting mechanism 300 can ensure the stability of the water tank 101 and prevent the heat pump water heater from being easy to topple over as a whole.

Optionally, a vent ring 630 is further included, the vent ring 630 being disposed between the upper case 100 and the lower case 200. With this alternative embodiment, the ring-shaped exhaust ring 630 is disposed between the upper casing 100 and the lower casing 200, and functions to separate the upper casing 100 from the lower casing 200, thereby providing an elegant appearance.

Optionally, a foaming material is filled between the upper case 100 and the water tank 101. Adopt this optional embodiment, utilize the packing of expanded material to let the holding that water tank 101 can be better fixed, prevent that water tank 101 from rocking, the expanded material of filling simultaneously can play fine heat preservation effect, prevents that the heat in the water tank 101 from scattering and disappearing.

Alternatively, the support mechanism 300 is closely attached to the inside of the lower case 200, and a sufficient installation space is provided inside the support mechanism 300. By adopting the optional embodiment, the compactness of the whole structure can be ensured, and the space utilization rate is increased.

Fig. 3, 4, 5 and 6 show an alternative structure of the upper and lower shells of the heat pump water heater.

In this alternative embodiment, the lower housing 200 is of a truncated cone type construction. By adopting the optional embodiment, the structure with the large lower side area and the small upper side area of the truncated cone structure is utilized, the stability is improved, and the side inclination is effectively prevented.

Optionally, the lower casing 200 includes a front side casing 202 and a rear side casing 203, the front side casing 202 and the rear side casing 203 are fixedly connected by screws, screw holes 204 for mounting screws are located on the rear side casing 203, and an air inlet 205 is provided on the front side casing 202. Adopt this optional embodiment, divide into two parts with lower casing 200, install through the butt joint, it is more convenient to install to it is also more convenient to dismantle during later stage maintenance.

Optionally, the upper housing 100 includes a cylindrical housing 102 and a top cover 103, the cylindrical housing 102 is sleeved outside the water tank 101, one side of the top cover 103 is provided with an elastic protrusion 104, the elastic protrusion 104 is inserted into the upper end of the cylindrical housing 102, the top cover 103 can be fixed on the cylindrical housing 102, and the inner side surface of the elastic protrusion 104 is an arc surface 105. Adopt this optional embodiment, divide into two parts with upper housing 100, the installation of being more convenient for, simultaneously, utilize the arcwall face 105 of top cap 103 downside elastic bulge 104 medial surface to the better fixed in upper end of water tank 101, prevent that water tank 101 from rocking, slope.

Alternatively, the elastic protrusion 104 is an annular protrusion with a diameter smaller than the inner diameter of the cylindrical shell 102, and is made of some elastic material such as rubber.

Optionally, the elastic protrusion 104 is composed of multi-lobe protrusions, and the multi-lobe protrusions form an annular structure, and a preset gap is formed between each lobe. With this alternative embodiment, the elasticity of the elastic lug 104 can be increased.

Fig. 7 shows an alternative embodiment of the water tank of the heat pump water heater.

In this alternative embodiment, the water tank 101 is a cylindrical structure with spherical ends, and the spherical surface on the lower side of the water tank 101 is fixed on the top end of the supporting mechanism 300 through the fixing connecting disc 106. Adopt this optional embodiment, can guarantee cylinder water tank 101 volume, reduce the space simultaneously and occupy, improve the pressure that water tank 101 can bear to utilize fixed connection dish to connect water tank 101 on supporting mechanism 300, be connected water tank 101 and supporting mechanism 300 and become a whole, guarantee the stability of water tank 101 through the stability of supporting mechanism 300.

Optionally, a heating pipe 105 is provided on the cylindrical side of tank 101. With this alternative embodiment, it is convenient to heat the water tank 101 by coiling the heating tube 105 outside the cylindrical water tank.

Alternatively, the fixing connection disc 106 is a disc-shaped structure, and one side of the fixing connection disc is connected to the water tank 101 by a fixing connection manner such as screws, welding, or fasteners, and the other side of the fixing connection disc is fixedly connected to the supporting mechanism 300 by screws, welding, or fasteners. With this alternative embodiment, the water tank 101 can be firmly fixed to the supporting mechanism 300, maintaining the stability of the water tank 101.

Fig. 8 shows an alternative heat pump implementation of the heat pump water heater.

In this alternative embodiment, the heat pump 201 includes a compressor 400, a condenser 500, an air channel structure 600 and an evaporator 700, the air channel structure 600 divides the internal space of the lower casing 200 into two parts, an air inlet end of the air channel structure 600 is located in the space on one side, the air inlet end of the air channel structure 600 faces the air inlet 205 on the front side casing 202, the evaporator 700 is disposed between the air inlet end of the air channel structure 600 and the air inlet 205, and the compressor 400 and the condenser 500 are disposed in the space on the other side of the air channel structure 600. Adopt this optional embodiment, the space in the casing 200 is divided into two parts down, can let wind get into from air inlet 205 when guaranteeing to admit air, in the air duct structure 600 is gone into behind evaporimeter 700 to by the direct discharge of air duct structure 600, the air current of production is whole through evaporimeter 700, avoid doing useless work, increase the efficiency of the heat transfer of evaporimeter 700, reduce the energy consumption, work is more stable, and after efficiency increased, can reduce the rotational speed of centrifugal fan in the air duct structure 600, thereby the noise reduction.

Fig. 9 to 16 show an alternative embodiment of the support mechanism.

In this optional embodiment, a supporting mechanism 300 includes a base 310 and a bearing rod 320, and further includes an upper bearing partition 330, a lower bearing partition 340, a lower supporting rod 350 and an upper supporting rod 360, the bearing rod 320 passes through the lower bearing partition 340, and both ends of the bearing rod are respectively connected to the base 310 and the upper bearing partition 330, the lower supporting rod 350 is disposed between the base 310 and the lower bearing partition 340, and the upper supporting rod 360 is disposed between the lower bearing partition 340 and the upper bearing partition 330.

By adopting the optional embodiment, the lower bearing partition plate 340 and the upper bearing partition plate 330 are supported by the bearing rods 320, so that the lower bearing partition plate 340 and the upper bearing partition plate 330 have bearing capacity, meanwhile, the lower support rods 350 are arranged between the base 310 and the support of the lower bearing partition plate 340, so that the stability of the lower bearing partition plate 340 can be ensured, the upper support rods 360 are arranged between the lower bearing partition plate 340 and the upper bearing partition plate 330 for supporting, the lower bearing partition plate 340 and the upper bearing partition plate 330 are connected into a whole with the same stress, meanwhile, a space is left between the lower bearing partition plate 340 and the upper bearing partition plate 330, so that enough installation space is provided for the exhaust ring 630, and the stability of the support mechanism 300 during upper side bearing is improved under the condition that reasonable installation space is kept.

Optionally, the bearing rod 320 is a solid cylindrical structure, the lower end of the bearing rod 320 is provided with a fixing plate 321, the lower side of the part of the bearing rod 320 penetrating through the lower bearing partition 340 is provided with a supporting protrusion 322 for supporting the lower bearing partition 340, and the diameter of the bearing rod 320 is proportional to the weight to be borne. By adopting the alternative embodiment, the solid cylindrical structure is used for providing sufficient bearing force, the fixing plate 321 at the lower end of the bearing rod 320 is used for fixing the bearing rod 320 on the base 310, the rotation of the bearing rod 320 is prevented, the stability of the structure is increased, the supporting protrusion 322 on the bearing rod 320 can support the lower bearing partition 340, the lower bearing partition 340 has sufficient bearing capacity, and the diameter of the bearing rod 320 is in direct proportion to the weight range to be supported.

Alternatively, the diameter of the load-bearing bar 320 is 50mm when the load-bearing bar 320 is required to carry 250kg, and the diameter of the load-bearing bar 320 is required to be increased or decreased by 0.5 times when the weight is not increased or decreased by 1 time.

Alternatively, the bearing bar 320, the fixing plate 321, and the support protrusion 322 may be integrally cast, or the fixing plate 321 and the support protrusion 322 may be separately manufactured and then welded to the bearing bar 320.

Optionally, a groove 311 is formed in the base 310, a lower support rod fixing groove 312 and two bearing rod lower fixing grooves 313 are formed in the groove 311, and the centers of the two bearing rod lower fixing grooves 313 are symmetric with respect to the center of the base 310. With this alternative embodiment, the lower end of the bearing bar 320 is fixed by the lower bearing bar fixing groove 313 on the base 310, and two bearing bars 320 can be installed, so as to provide sufficient bearing capacity in a limited space, and the installation positions of the two bearing bars 320 are strictly symmetrical, thereby preventing uneven bearing capacity.

Alternatively, the groove 311 is a groove recessed downward from the upper side of the base 310.

Optionally, the upper side of the upper bearing partition 330 is provided with an inward concave spherical structure, a circle center of the inward concave spherical structure is provided with a mounting groove 333 in which the fixed connection disc 106 can be mounted, and the lower side of the upper bearing partition 330 is provided with an upper support rod fixing groove 331 and two upper bearing rod fixing grooves 332. Adopt this optional embodiment, utilize the spherical surface structure of indent on the one hand, the spherical structure of the water tank 101 lower extreme that needs the installation when the cooperation is used, better fix water tank 101, on the other hand go up the fixed slot 332 can be fine on the bearing bar of bearing partition plate 330 downside and fix the upper end of bearing bar 320, and the position of fixed slot 332 corresponds under two bearing bars on two bearing bars and the position of fixed slot 313 under two bearing bars on base 310, keep the vertical relation between two bearing bars 320 and base 310 and the last bearing partition plate 330, go up the upper strut fixed slot 331 of bearing partition plate 330 downside then and be used for the upper end of fixed connection upper strut 360.

Alternatively, the mounting groove 333 and the fixing connection disc 106 may be fixedly connected by a screw, welding, or fastening.

Optionally, the lower bearing partition 340 is provided with a support rod connection groove 341, an air duct structure through groove 342, and a bearing rod through hole 343, and the lower side surface of the lower bearing partition 340 is provided with an evaporator fixing clip 344. With this alternative embodiment, the bearing rod through hole 343 can let the bearing rod 320, which plays a supporting role, pass through, and simultaneously support the lower bearing partition 340 and the upper bearing partition 330, and the air duct structure through groove 342 is used to let the air duct structure pass through from the middle.

Optionally, the upper side of the supporting rod connecting groove 341 is a strip-shaped groove for fixing the upper supporting rod 360, and the lower side is a square groove for fixing the lower supporting rod 350. With this alternative embodiment, the supports of the upper support rod 360 and the lower support rod 350 are connected in a straight line, and the stability of the force is maintained.

Optionally, the support bar connecting groove 341 is a combined name of two grooves disposed on the lower bearing partition 340, the two grooves are a strip-shaped groove on the upper side and a square groove on the lower side, the two grooves correspond in position, and the two grooves do not penetrate through the lower bearing partition 340.

Optionally, the lower support rods 350 are provided with one or more and uniformly arranged circumference between the base 310 and the lower load-bearing partition 340, and the upper support rods 360 are provided with one or more and uniformly arranged circumference between the lower load-bearing partition 340 and the upper load-bearing partition 330. With the alternative embodiment, the upper support rods 360 which are uniformly distributed support the base 310 and the lower bearing partition plate 340, so as to improve the support stability, and the lower support rods 350 which are uniformly distributed support the lower bearing partition plate 340 and the upper bearing partition plate 330, so as to improve the support stability.

Optionally, the lower supporting rod 350 has a preset inclination angle, the preset inclination angle of the lower supporting rod 350 is in inverse proportion to the required weight to be borne, the lower supporting rod 350 is of a channel steel structure, a first fixing plate 351 protruding towards the direction of the notch is arranged at the lower end of the lower supporting rod 350, first fixing clips 352 bending downwards are arranged on two sides of the first fixing plate 351, and a second fixing plate 353 protruding towards the direction of the notch is arranged at the upper end of the lower supporting rod 350. With this alternative embodiment, the angle of inclination of the lower support bar 350 is used to resist the lateral force, so as to improve the stability of the support mechanism 300 and prevent the support mechanism 300 from tilting, and the larger the weight to be supported is, the smaller the angle of inclination of the lower support bar 350 is, the larger the force resisting the tilting is, and the first fixing plate 351 is clipped into the lower support bar fixing groove 312 on the base 310, and the second fixing plate 353 is clipped into the support bar connecting groove 341 on the lower bearing partition plate 340, so that the lower support bar 350 is perfectly fixed between the base 310 and the lower bearing partition plate 340 by the first fixing plate 351 and the second fixing plate 353 at the upper and lower ends of the lower support bar 350, and the channel steel structure of the lower support bar 350 increases the strength of the lower support bar 350 itself and reduces the weight.

Optionally, the preset inclination angle of the lower support rod 350 is 89.1 degrees when the weight to be borne is 250 kg; the preset inclination angle is reduced by 0.01 times for every 1 time increase of the required load-bearing weight.

Optionally, the preset inclination angle of the lower support bar 350 is greater than 60 degrees and less than or equal to 90 degrees.

Optionally, the upper supporting rod 360 is a groove-shaped steel structure, a third fixing plate 361 protruding in a reverse direction of the groove opening is arranged at the lower end of the upper supporting rod 360, a second fixing clip 362 bending downwards is arranged on two sides of the third fixing plate 361, a blocking plate 363 bending downwards vertically is arranged at one end of the third fixing plate 361, and a fourth fixing plate 364 protruding in the direction of the groove opening is arranged at the upper end of the upper supporting rod 360. With this alternative embodiment, the third fixing plate 361 is snapped into the support bar connection groove 341 on the lower load-bearing partition plate 340, the fourth fixing plate 364 is snapped into the upper support bar fixation groove 331 on the upper load-bearing partition plate 330, and the upper support bar 360 is stably fixed to the lower load-bearing partition plate 340 and the upper load-bearing partition plate 330 by the third fixing plate 361 and the fourth fixing plate 364.

Fig. 17-24 illustrate an alternative embodiment of the air duct structure.

In this optional embodiment, an air duct structure 600 includes a volute 610, an air guiding shell 620 and an exhaust ring 630, an air outlet end of the volute 610 is communicated with an air inlet end of the air guiding shell 620, and a wind blocking sheet 611 is disposed on a peripheral edge of the volute 610; the air outlet end of the air guide shell 620 is communicated with the inner arc surface of the air exhaust ring 630; the air guide pieces 631 are arranged on the periphery of the exhaust ring 630, the air guide pieces 631 are of arc structures, and the air guide pieces 631 are bent towards the same side in a unified mode.

By adopting the optional embodiment, the installation space of the wind shield piece 611 is divided into two parts, so that the air inlet of the air duct structure 600 completely comes from the same side, namely, the side where the evaporator is installed, and the air flow passes through the evaporator in a centralized manner, so that the air flow circulating in the air duct structure 600 exchanges energy with the evaporator as much as possible, the wind guiding efficiency of the air duct structure 600 is effectively improved, and the running speed of a centrifugal fan in the air duct structure 600 can be properly reduced after the wind guiding efficiency is improved, and the purpose of reducing noise is achieved.

Optionally, the volute 610 includes a first volute 612 and a second volute 613, the first volute 612 is provided with a first volute 614, the centrifugal fan 800 is embedded in the first volute 614, the second volute 613 is provided with a second volute 615, the second volute 615 is provided with an air inlet 616, and the air suction end of the centrifugal fan 800 is adjacent to the air inlet 616. By adopting the optional embodiment, the volute 610 is divided into two parts, so that the interior of the volute 610 can be maintained at the later stage, and the centrifugal fan 800 corresponds to the air suction end, so that the air flow can enter the volute 610 more smoothly.

Optionally, an air outlet 632 is disposed at a connecting portion of the air outlet end of the air exhausting ring 630 and the air guiding shell 620, an air guiding sheet 631 in the air outlet 632 penetrates through the air outlet 632, other portions of the air exhausting ring 630 except the air outlet 632 are all closed structures, and the air guiding sheet 631 is embedded in the closed structures. By adopting the optional embodiment, the half-side air outlet can be ensured, and the decorative air guide piece 631 can be directly embedded in the half-side without air outlet, so that the cost can be reduced.

Optionally, one end of the centrifugal fan 800 is embedded in the first scroll groove 614 by a depth which is one half to three quarters of the depth of the first scroll groove 614 plus the depth of the second scroll groove 615, the first scroll groove 614 is connected in a sealing manner, and the other end of the centrifugal fan 800 is provided with a bare drain outside the first scroll 612. By adopting the optional embodiment, the part of the centrifugal fan 800 is embedded into the volute 610, the volute 610 is used for partially isolating the noise generated by the centrifugal fan 800, the noise is reduced, and meanwhile, the embedded installation mode is adopted, so that the structure is more compact, and the space occupancy rate is reduced.

Optionally, the first scroll groove 614 and the second scroll groove 615 are identical in shape, a sealing groove is provided on an edge of the first scroll groove 614 and an edge of the second scroll groove 615, or a sealing groove is provided on an edge of the first scroll groove 614 or an edge of the second scroll groove 615, a sealing strip is provided in the sealing groove, and the first scroll 612 and the second scroll 613 are fixed by screws. With this alternative embodiment, the first and

second worm grooves

614 and 615 with identical structures are fastened together to form an integral worm groove, and the sealing groove and the sealing strip between the two parts can ensure the sealing performance between the first and

second worm grooves

614 and 615 and prevent air leakage.

Optionally, the air guide shell 620 is of a semicircular structure, the arc surface of the air guide shell 620 is an air outlet end, the lower side surface of the air guide shell 620 is an air inlet end, and the air outlet end of the air guide shell 620 is opposite to the air inlet 616. By adopting the optional embodiment, the half-round structure is adopted, the air flow is ensured to be discharged from the half side, and the discharged cooled air can be ensured not to be sucked from the air inlet 616 again immediately by utilizing the opposite directions of the air outlet end of the air guide shell 620 and the air inlet 616, so that the temperature of the air sucked from the air inlet 616 is relatively high, and the utilization rate of air temperature energy is improved.

Optionally, the arc-shaped edge of the air guiding shell 620 is provided with a guide groove 621, and the middle of the upper side surface of the air guiding shell 620 is provided with a through hole 622. With this alternative embodiment, the support mechanism 300 in the heat pump water heater is provided with increased installation space by using the reserved guide slot 621 and through hole 622, which facilitates the combination of the whole components.

Optionally, an arc-shaped air guiding surface is disposed on a side of the inside of the lower side of the air guiding casing 620 opposite to the air outlet end of the volute 610. Adopt this optional embodiment, dredge the formation of air current to reduce the windage, guarantee that the air current is more smooth and easy.

Optionally, one or more pipe grooves 617 are formed at one side of the wind blocking piece 611, and the wind blocking piece fixing pieces 618 are formed at both ends of the lower side of the wind blocking piece 611. With this alternative embodiment, the whole air duct structure 600 can be stably fixed inside the heat pump water heater by the fixing plate 618, and the pipe groove 617 reserves the arrangement position for the pipe inside the heat pump water heater.

Fig. 25 to 30 show an alternative embodiment of the evaporator.

In the optional embodiment, the evaporator 700 comprises heat exchange tubes 701, the heat exchange tubes 701 are connected in series through U-shaped tubes 702, the heat exchange tubes 701 are arranged in two parallel surfaces, the heat exchange tubes 701 are of a bent structure, two ends of each heat exchange tube 701 are clamped on a heat exchange tube positioning piece 703, and a sealing blocking piece 704 is arranged on one side of each heat exchange tube positioning piece 703.

By adopting the optional embodiment, the contact area between the heat exchange tube 701 with the bent structure and air is increased, so that the heat exchange efficiency of the evaporator 700 is increased, the sealing baffle plate 704 plays a role in gathering air flow, the air flow is gathered at the position of the heat exchange tube 701, the heat exchange efficiency of the evaporator 700 is improved, and the design that the heat exchange tubes 701 are distributed on two surfaces is favorable for reducing wind resistance while ensuring the heat exchange efficiency.

Alternatively, the heat exchange tubes 701 are arranged on two surfaces, wherein the heat exchange tube 701 on one surface corresponds to a gap between two heat exchange tubes 701 on the other surface. With this alternative embodiment, the air flow passing through the two heat exchange tubes 701 directly contacts the heat exchange tube 701 on the other surface for heat exchange, thereby increasing the heat exchange efficiency.

Optionally, a first preset distance is provided between the two heat exchange tubes 701 arranged on one surface. With the alternative embodiment, the distance between the heat exchange tubes 701 on the same surface is controlled by the first preset distance, and then the size of the wind resistance is controlled by the distance.

Optionally, a second preset distance is provided between two arranged surfaces of the heat exchange pipe 701. By adopting the optional embodiment, the distance between the two surfaces of the heat exchange pipe 701 arranged is reasonably controlled through the second preset distance, and the size of the wind resistance can be controlled as well.

The selectable first preset distance and the second preset distance can be set according to actual conditions, the size of the wind resistance is determined by the first preset distance and the second preset distance, and the optimal widths of the first preset distance and the second preset distance are the diameters of the heat exchange tube 701.

Optionally, the heat exchange tube 701 has a V-shaped structure, and a bending point of the V-shaped structure is an arc. By adopting the optional embodiment, the contact area between the heat exchange tube 701 with the V-shaped structure and the airflow is larger, the opening of the V-shaped structure faces the inner side of the heat pump water heater, and the two sides of the V-shaped structure are tightly attached to the edge of the inner wall of the heat pump water heater, so that the occupation of space is reduced.

Optionally, the heat exchanger 701 is of a circular arc type structure. By adopting the optional embodiment, through the contact area between the heat exchange tube 701 of the arc-shaped structure and the air flow, the inner side arc surface of the arc-shaped structure faces the inner side of the heat pump water heater, and the outer side arc surface of the arc-shaped structure is tightly attached to the edge of the inner wall of the heat pump water heater, so that the occupation of space is reduced.

Optionally, the heat exchange tube positioning piece 703 is of a groove-shaped structure, and a positioning hole 705 for fixing the heat exchange tube 701 is formed in the heat exchange tube positioning piece 703. By adopting the optional embodiment, the heat exchange pipe 701 is fixed by the positioning hole 705, and the heat exchange pipe 701 is regularly arranged according to a fixed shape, so that the heat exchange pipe 701 is shaped and reinforced.

Optionally, one end of the heat exchange tube positioning plate 703 is provided with a fixing clip 706 with an inverted notch. With this alternative embodiment, the heat exchange tube positioning plate 703 is fixed by the fixing clip 706, thereby fixing the entire evaporator 700.

Optionally, the sealing baffle 704 is a triangular structure, one side of which is fixedly connected with one side of the heat exchange tube positioning piece 703 through a screw. By adopting the optional embodiment, the sealing baffle 704 with the triangular structure is matched with the inner wall of the heat pump water heater at the installation position, and the space at two sides of the heat exchange tube is closed, so that the air flow can completely exchange heat through the heat exchange tube 701.

Alternatively, one or more heat exchangers 700 may be used simultaneously, with one or more heat exchangers 700 in parallel.

Fig. 31 to 36 show an alternative embodiment of the centrifugal fan.

In this optional embodiment, a centrifugal fan 800 includes a fan motor 801 and centrifugal blades 802, the centrifugal blades 802 are installed at an output end of one side of the fan motor 801, the centrifugal blades 802 include blades 803 and an impeller 804, and a heat dissipation hole 805 is formed at one end of the fan motor 801 where the centrifugal blades 802 are installed; a wind tunnel 806 is arranged on the side surface of the centrifugal fan blade 802 connected with the fan motor 801, and the side surface is sunken towards the inside of the centrifugal fan blade 802; the blade 803 has a notch 807 at the end where it joins the impeller 804.

By adopting the optional embodiment, because the outlet air of the blade 803 at the connection part of the impeller 804 is blocked by the impeller 804, the blade 803 can be prevented from doing useless work by utilizing the notch 807 arranged at one end of the blade 803 at the connection part with the impeller 804, the resistance of the blade 803 can be reduced, the efficiency of the blade 803 in absorbing air flow is improved, the heat dissipation hole 805 is arranged at one side of the fan motor 801 close to the centrifugal fan blade 802, the air flow generated by the rotation of the impeller 804 dissipates heat of the fan motor 801, the working stability of the fan motor 801 is improved, and the efficiency of the centrifugal fan 800 is improved as a whole.

Alternatively, the centrifugal fan blades 802 are directly fixedly attached to the rotating shaft of the fan motor 801 by screws.

Optionally, an auxiliary heat dissipating port 808 is disposed at the end opposite to the output end of the blower motor 801. By adopting the optional embodiment, the two ends of the fan motor 801 are simultaneously cooled, the cooling efficiency of the fan motor 801 is further increased, and the working stability of the fan motor 801 is improved.

Optionally, the heat dissipation hole 805 and the auxiliary heat dissipation hole 808 penetrate through the blower motor 801 to form a heat dissipation air duct structure. With this alternative embodiment, a part of the airflow is sucked from one end of the fan motor 801 and discharged from the other end by the airflow generated by the rotation of the blade 803, so that the airflow passes through the inside of the fan motor 801, thereby increasing the heat dissipation efficiency of the fan motor 801.

Optionally, the fan motor 801 is provided with a sealing mounting sheet 809 on the side. By adopting the optional embodiment, the fan motor 801 is conveniently fixed on the air duct structure, and the sealing performance between the fan motor 801 and the air duct structure is kept, so that air leakage is prevented, and the suction pressure of the centrifugal fan is reduced.

Optionally, the side circumference of the centrifugal fan blade 802 connected to the fan motor 801 is provided with an annular surface 810. With this alternative embodiment, the blades 803 remain fixed with the annular face 810.

Alternatively, one end of the blade 803 is fixedly attached to the annular surface 810. With this alternative embodiment, one end of the entire blade 803 is fixed to the annular surface 810, so that the wind resistance of the entire blade 803 is maintained, the firmness of the blade 803 is improved, and the blade 803 is directly fixed to the annular surface 810 by injection molding during production.

Optionally, the portion of centrifugal fan blades 802 recessed inwardly is less than the thickness of centrifugal fan blades 802. By adopting the optional embodiment, the inward recessed part of the centrifugal fan blade 802 is ensured not to protrude to the other side of the centrifugal fan blade 802, the occupation of space is reduced, and the mounting structure is more compact.

Alternatively, the centrifugal fan blades 802 are inwardly recessed portions, with a gradually decreasing diameter. With this alternative embodiment, the diameter of the recessed portion is tapered to provide the recessed portion with sloped sides, and the inner diameter is tapered to provide a bowl-like shape, which improves structural stability and makes the side of the centrifugal fan blade 802 that is connected to the fan motor 801 more robust.

Alternatively, the wind tunnels 806 are uniformly arranged on the lateral periphery of the portion of the centrifugal fan blades 802 that are inwardly concave. With this alternative embodiment, wind tunnel 806 is evenly distributed, which stabilizes the airflow as centrifugal fan blades 802 rotate.

Alternatively, wind tunnel 806 is an elliptical or circular hole that extends through the inwardly recessed side of centrifugal fan blades 802.

Optionally, the impeller 804 is attached to the outboard end of the blade 803, and the width of the gap 807 is the same as the width of the impeller 804. With this alternative embodiment, the wind resistance of the blades 803 during rotation can be reduced, and the wind deflection of the blades 803 is not affected.

Alternatively, the centrifugal fan blade 802 is integrally formed by injection molding. By adopting the alternative embodiment, the stability of the structure of the centrifugal fan blade 802 can be effectively increased, and the production and the manufacture are more convenient.

The working principle of the heat pump water heater is as follows: the compressor 400 and the condenser 500 are integrated, the compressor 400 can compress the refrigerant in the condenser 500 to release heat, the inlet end of the evaporator 700 is communicated with the outlet end of the condenser 500 through a refrigerant pipe, the outlet end of the evaporator 700 is connected with the inlet end of the condenser 500 through a refrigerant pipe, the outer side of the condenser 500 is coiled with a heat exchanger, the inlet end of the heat exchanger is communicated with the outlet end of the heating pipe 105, the outlet end of the heat exchanger is communicated with the inlet end of the heating pipe 105, and the outlet end of the heat exchanger and the inlet end of the heating pipe 105 are provided with water pumps to drive media in the heat exchanger and the heating pipe; when air passes through the evaporator 700, the refrigerant in the evaporator 700 is heated, the refrigerant in the evaporator 700 absorbs heat to be vaporized, then the refrigerant flows into the condenser 500, the refrigerant is liquefied and releases heat under the pressurization of the compressor 400, the medium is heated through the heat exchanger, then the heated medium is conveyed into the heating pipe 105 through the water pump, the heating pipe 105 is wound outside the water tank 101, the water in the water tank 101 is heated, the low-temperature heat in the air is absorbed under the continuous circulation of the refrigerant and the medium, the water in the water tank is heated, and the overall energy consumption is small.

It will be understood that the present invention is not limited to the structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. An air duct structure comprises a volute, an air guide shell and an exhaust ring, wherein an air outlet end of the volute is communicated with an air inlet end of the air guide shell; the air outlet end of the air guide shell is communicated with the inner arc surface of the exhaust ring; the periphery of the exhaust ring is provided with air guide sheets, the air guide sheets are of arc structures, and the air guide sheets are uniformly bent towards the same side.

2. The air duct structure according to claim 1, wherein the volute casing includes a first volute casing and a second volute casing, the first volute casing is provided with a first volute groove, the centrifugal fan is embedded in the first volute groove, the second volute casing is provided with a second volute groove, the second volute groove is provided with an air inlet, and the air suction end of the centrifugal fan blade is adjacent to the air inlet.

3. The air duct structure according to claim 2, wherein a gas outlet is provided at a connecting portion between the exhaust ring and the gas outlet end of the air guide shell, the air guide piece in the gas outlet penetrates through the gas outlet, other portions of the exhaust ring except the gas outlet are all closed structures, and the air guide piece is embedded in the closed structures.

4. The air duct structure according to claim 2, wherein one end of the centrifugal fan is embedded in the first volute groove to a depth which is one half to three quarters of the depth of the first volute groove plus the depth of the second volute groove, and the first volute grooves are hermetically connected to each other, and the other end of the centrifugal fan is provided with a blind drain on the outer side of the first volute.

5. The air duct structure according to claim 2, wherein the first spiral groove and the second spiral groove have the same shape, and a sealing groove is provided on an edge of the first spiral groove and an edge of the second spiral groove, or a sealing groove is provided on an edge of the first spiral groove or an edge of the second spiral groove, a sealing strip is provided in the sealing groove, and the first spiral case and the second spiral case are fixed by screws.

6. The air duct structure according to any one of claims 1 to 5, wherein the air guide shell is a semicircular structure, the arc surface of the air guide shell is an air outlet end, the lower side surface of the air guide shell is an air inlet end, and the air outlet end of the air guide shell is opposite to the air inlet.

7. The air duct structure according to claim 6, wherein the arc-shaped edge of the air guide shell is provided with a guide groove, and a through hole is formed in the middle of the upper side surface of the air guide shell.

8. The air duct structure according to claim 6 or 7, wherein an arc-shaped air guide surface is arranged on a side of the inside of the lower side of the air guide shell opposite to the air outlet end of the volute.

9. An air duct structure according to any one of claims 1 to 8, wherein one side of the wind-shielding plate is provided with one or more duct grooves, and both ends of the lower side of the wind-shielding plate are provided with wind-shielding plate mounting fixing pieces.

10. A heat pump water heater comprising the air duct structure of any one of claims 1 to 9.