WO2022218439A1

WO2022218439A1 - Fan and heat pump type water heater using same

Info

Publication number: WO2022218439A1
Application number: PCT/CN2022/087424
Authority: WO
Inventors: 王菲; 伍敏; 罗文�
Original assignee: 瑞美(中国)热水器有限公司
Priority date: 2021-04-16
Filing date: 2022-04-18
Publication date: 2022-10-20
Also published as: CN113074457A; US20240200828A1

Abstract

The present invention relates to the field of heat pump water heaters. Disclosed are a fan and a heat pump type water heater using same. The fan of the present invention is mounted upside down in an upper space of a water tank for pumping air refrigerated by an evaporator in the heat pump type water heater; the fan comprises volutes, a partition plate, and an impeller, the impeller is arranged in the volutes, the volutes are designed as an involute structure, and volute tongues of the volutes are in a backscrolling shape; there are two volutes, the partition plate is arranged between the two volutes, spiral shafts of the two volutes are perpendicular to the partition plate, and the two volutes are symmetrically arranged; an air inlet is formed in the side wall of each volute distant from the partition plate, the air inlets are perpendicular to the spiral shafts of the volutes, and air outlet directions of the air outlets of the two volutes are the same. The integrated heat pump water heater of the present invention can achieve effects such as high energy efficiency, large heating capacity, and low noise in a limited space mainly by means of optimization of a wind field of the whole system and reasonable layout of components.

Description

Fan and heat pump type water heater using the fan

technical field

The invention relates to a fan and a heat pump type water heater using the fan, and relates to the field of heat pump water heaters.

Background technique

With the improvement of living standards, more and more people pay attention to higher quality of life, and also pay more and more attention to how much energy consumption is needed to obtain the same income. Energy utilization has gradually become the pursuit and goal of people's quality of life. As a new type of water heater, the heat pump type water heater has higher actual energy efficiency. Compared with the electric water heater, its consumption of 1kW of electricity will generate more than 1kW of heat, which also makes it used in the practical application of water heaters. quality of life and response to the call for a low-carbon life. The working principle of the heat pump water heater is to use the reverse Carnot cycle to concentrate the heat in the environment to form an effect similar to a heat pump, and extract the heat from the environment to heat the water in the water tank to achieve the purpose of hot water supply.

The reverse Carnot cycle generally includes four components. The power core components generally use compressors (including centrifugal rotor compressors, scroll compressors, etc.), and the compressors are used for medium (including R134a, R404A, R22, etc.) Type refrigerant) is compressed to form a high temperature and high pressure type gas refrigerant (for example, different refrigerants can form superheated refrigerants up to tens of degrees or even nearly 100 degrees Celsius); it is transported to the condenser to exchange heat with the water tank or water, Finally, the phase change in the release of superheat is realized, and the latent heat and sensible heat of the cooling medium are used to heat the water and convert it into a refrigerant liquid medium in a supercooled state; After throttling, it becomes a low-pressure liquid medium with a large superheat degree, and finally evaporates in the evaporator, exchanging heat with the air flowing through the evaporator, thereby absorbing the heat in the air. Due to the function of the throttling element, the evaporation temperature of the low-pressure liquid refrigerant can actually be relatively low at this time, so it can adapt to changes in the ambient temperature within a certain range, and can achieve the effect of absorbing heat in the air to complete the entire cycle.

In order to ensure the comprehensive requirements of the heating capacity and energy efficiency of the water heater, the heat pump type water heater generally adopts a split design, but this design has defects such as difficult installation and high maintenance cost. In order to ensure the beauty of the entire heat pump system, more and more heat pump water heaters adopt an integral design, which has the advantages of easy installation and small footprint. However, there are very few heat pump water heaters that can achieve high energy efficiency, large heating capacity, and integrated design. An innovative design is urgently needed to solve the contradiction between aesthetic space and heating energy efficiency.

SUMMARY OF THE INVENTION

In view of the above-mentioned deficiencies in the prior art, a fan and a heat pump type water heater using the fan are provided, so as to solve the problems of insufficient heating capacity of the system and poor design of the system wind field in the prior art under the requirements of aesthetics, space requirements, and convenient installation. Insufficient heating capacity caused by inefficient heat exchange with air, and technical problems such as low actual energy efficiency under standard system conditions caused by unreasonable overall system layout, and even lead to serious deviations in the design of the heat pump system until the heat pump water heater cannot be realized The energy saving benefits brought by energy efficiency.

In order to achieve the above purpose, the technical scheme adopted in the present invention:

The fan used for the heat pump water heater, the fan is a double-inlet type fan, and the double-inlet type fan is optimally selected as a centrifugal type fan, including a volute, a partition plate and an impeller, the impeller is arranged in the volute, and the impeller The rotating shaft is located on the helical axis of the volute and is connected with the transmission shaft in the volute,

The volute is designed with an involute structure, and the volute tongue of the volute is in a reverse roll shape;

There are two volutes, the spacer plate is disposed between the two volutes to form two sets of exhaust passages, the helical axes of the two volutes are perpendicular to the spacer plate, and the two volutes are arranged symmetrically to each other;

A side wall of the volute away from the partition plate is provided with an air inlet, the air inlet is perpendicular to the spiral axis of the volute, and the two air outlets are arranged in parallel and in the same direction, so that the air outlet directions of the air outlets of the two volutes are the same.

A drive motor is arranged on the partition plate to ensure reliable and effective heat dissipation of the motor, and the drive motor is arranged symmetrically with the partition plate as a symmetrical plane, and is located in the center of the partition plate, and the air on both sides of the partition plate does not flow. interfere with each other. Impellers are arranged on the output shaft of the drive motor and located in different volutes, and the gap between the impeller and the volute satisfies the relationship of an involute equation.

The present invention also provides a heat pump type water heater, comprising a condenser and a water tank, the top of the water tank is provided with a heat pump system;

The heat pump system includes a casing, and the above-mentioned fan is arranged inside the casing, and an evaporator, a compressor and a throttling device are also arranged;

The air outlet of the compressor is connected to the air inlet of the condenser, the liquid outlet of the condenser is connected to the liquid inlet of the throttling device, the liquid outlet of the throttling device is connected to the liquid inlet of the evaporator, and the air outlet of the evaporator Connected to the air inlet of the compressor;

The fan is used to take away the air refrigerated by the evaporator, the fan is installed upside down in the upper space of the water tank, and the air outlet and the air inlet of the fan are both vertical.

Further, the air outlet directions of the two volute air outlets are horizontal, and the air outlets are located on the lower side of the air inlets.

Further, the axis of the impeller is horizontal, the axis of the impeller preferably coincides with the axis of the spiral of the volute, and the included angle between the axis of the impeller and the axis of the water tank is 90°.

Further, the evaporator is a plate type evaporator, two sets of plate type evaporators are symmetrically arranged on both sides of the partition plate, and the plate surface of the plate type evaporator is opposite to the air inlet of the volute.

Further, the two sets of plate evaporators are arranged in parallel. In order to make full use of the heat exchange area, when the evaporators are divided into two groups, in addition to the vertically symmetrical evaporators, other structures such as double L type, double C type and

type and so on.

Further, the gap between the air inlet and the evaporator and the wall surface of the volute form a uniform air distribution chamber, and the distance between the air inlet and the evaporator is 30-90 mm.

Further, a lattice baffle is connected between the two sets of the evaporators, the lattice baffle is arranged vertically, the lattice baffle is located on the side of the volute and is far away from the air outlet of the volute, and the lattice baffle is away from the side of the air outlet. There is a compressor on it. Both ends of the grid baffle are respectively connected to the evaporators on both sides of the fan. The thickness of the grid baffle is 0.8-1.5 mm. The shape of the grid baffle plate can be adaptively adjusted according to the relative positional relationship between the compressor and the fan.

Further, the central plane of the evaporator is parallel to the partition plate, the axis of the central plane of the evaporator includes a vertical axis and a horizontal axis, the vertical distance between the vertical axis and the axis of the impeller is 0-125mm, and the horizontal axis and the axis of the impeller are The vertical distance of the axis is 0-50mm. The central plane is the vertical plane of the center of the evaporator and is parallel to the partition plate. At this time, the axis of the central plane is the vertical centerline (vertical axis) and the horizontal centerline (horizontal axis) of the rectangular surface. Of course, in other scenarios, it may be It is only a symmetrical distribution of part of the central plane of the evaporator (such as C-type, L-type, etc. evaporators).

That is, the vertical distance between the vertical center line of the evaporator and the axis of the impeller is 0-125 mm, and the horizontal distance between the horizontal center line of the evaporator and the axis of the impeller is 0-50 mm.

Further, an air inlet is provided on the housing at a position corresponding to the evaporator, and an air outlet is provided on the housing at a position corresponding to the air outlet.

Further, the condenser can be arranged inside the water tank or attached to the wall of the water tank, and it is included in the range constructed by the outer space of the water tank.

Further, the COP of the heat pump system is not lower than 4.0 under standard conditions.

Beneficial effects of the present invention:

1) The present invention designs a heat pump type water heater with high energy efficiency, large heating capacity, and low noise based on the integrated water heater, which also satisfies the characteristics of easy system installation and good production and maintenance.

2) The arrangement of the fan of the present invention can effectively improve the heat exchange efficiency of the evaporator and reduce the noise.

3) In the present invention, by using the heat pump type water heater containing the fan of the present invention, the energy efficiency index under standard conditions is not lower than COP4.0 (meeting the requirements of secondary energy efficiency), and the heating capacity is not less than 2500W. Large heating capacity, and The noise of the whole machine can also be maintained at a level close to 40dB(A).

Description of drawings

1 is a schematic diagram of the principle of a heat pump type water heater in the prior art;

Fig. 2 is the external schematic diagram of the heat pump type water heater provided by the embodiment of the present invention;

FIG. 3 is a schematic layout diagram of a part of a heat pump system provided by an embodiment of the present invention;

4 is a top view of a fan according to an embodiment of the present invention;

5 is a schematic diagram of a volute provided by an embodiment of the present invention;

Figure 6 is a front view of the heat pump system shown in Figure 3;

Figure 7 is a top view of the heat pump system shown in Figure 3;

FIG. 8 is an enlarged view of the heat pump system shown in FIG. 3;

9 is a schematic diagram of setting the axial distance between a fan and an evaporator according to an embodiment of the present invention;

10 is a schematic diagram of a performance test result of a heat pump type water heater provided by an embodiment of the present invention;

11 is a schematic diagram of the overall structure of the fan of the present invention;

In the figure: 1, water tank; 2, shell; 3, fan; 4, evaporator; 5, compressor; 6, air inlet; 7, air outlet; 8, volute; 9, partition plate; 10, air intake mouth; 11, air outlet; 12, grid baffle; 13, volute tongue; 14-throttle device.

Detailed ways

The following will combine the drawings in the embodiments of the present invention; the technical solutions in the embodiments of the present invention will be described clearly and completely; obviously; the described embodiments are only a part of the embodiments of the present invention; rather than all the embodiments, based on The embodiments of the present invention; all other embodiments obtained by those of ordinary skill in the art without creative work; all belong to the protection scope of the present invention.

As shown in Figure 1, on the one hand, the compressor 5 provides the power to circulate the refrigerant in the entire system (of course, the type of refrigerant is not limited here, it can be R134a, R404A, R22, or even CO ₂ working in a supercritical state, etc.), and on the other hand On the one hand, for the gaseous refrigerant compression work, the energy of the refrigerant increases the working power of W, and the dissipation effect in the process is not considered here. After the refrigerant absorbs the work of the compressor 5, it becomes a high temperature and high pressure gaseous refrigerant due to its own temperature rise. At the position of the water tank 1, it can be arranged on the outer wall surface of the water tank 1 through a coil or a micro-coil. Of course, an auxiliary heat-conducting layer with good thermal conductivity can be applied between the coil, the micro-coil and the wall, or the coil can be used. The tube is arranged in the water tank 1. Of course, for a special type of water heater, a plate heat exchanger may also be used to achieve wall-type heat exchange between water and refrigerant, which is not limited here. After the refrigerant in the high temperature and high pressure state in the condenser exchanges heat with the low temperature water, it is condensed into a liquid form with a lower temperature, that is, the latent heat and sensible heat contained in the refrigerant in the condenser are transferred to the water. The absorbed heat is Qw. Of course, the water that has absorbed the heat can be heated by circulating for many times to raise the water in the water tank 1 to the set temperature, and the condensed refrigerant passes through the throttling device 14 (here can be a thermal expansion valve, a capillary tube , electronic expansion valve, etc.), it becomes a superheated refrigerant with a certain degree of superheat. After entering the evaporator 4, it is equivalent to entering a fully developed large-scale space, so the refrigerant will absorb heat. At this time, the fan 3 makes the evaporator 4 The air in contact is pumped in real time, thus achieving the effect of continuous energy supply from the surrounding air. Of course, in order to meet the heating demand, the speed of the fan 3 can be precisely controlled, so as to achieve the effect of precise heating. The energy drawn from the surrounding air is Qa. During the whole cycle, we can clearly obtain Qw=W+Qa according to the principle of energy conservation, where W is the work done by the compressor 5, which is strongly related to the power consumption, It can even occupy more than 80% of the power consumption of the entire system, which is not limited here, and the energy obtained by the actual water includes two parts, that is, the work part of the compressor 5 and the part extracted from the surrounding air. The part of the energy extracted from the air is often several times the work done by the compressor 5, so this is also the reason why the heat pump type water heater can obtain higher energy efficiency and higher output ratio, which is also the heat pump system compared with the traditional electric water heater. The most basic reason for more energy saving, so the heat pump type water heater will also become a new trend of high energy efficiency in the subsequent production and life, but the traditional type of heat pump water heater is generally designed as a split in the scenario of large heating capacity and high energy efficiency The type of water heater, that is, the condenser and the water tank 1 as one part, and the compressor 5, the fan 3, etc. as the other part, form two parts, indoor and outdoor, similar to the current air conditioner installation scheme, but the installation scene required by this scheme is more complex , and the overall space occupied by the system is particularly large, and for users, the appearance of the split heat pump water heater cannot be designed particularly beautiful. The noise heat pump type water heater also meets the characteristics of easy system installation and good production and maintenance.

Example 1

As shown in Figures 3-5 and 11, the fan used for the heat pump type water heater, fan 3 adopts a double-inlet type fan, which can ensure that the air intake can meet the demand. There is basically no interference between the air outlets of the two volutes 8, the helical axes of the two volutes 8 are perpendicular to the partition plate 9, and the two volutes 8 are arranged symmetrically with each other. The design of the double air inlet fans can create a negative pressure area from the symmetrical side to achieve the effect of greater heating capacity. Of course, the air inlets 6 can also be set to more than two structures, which is not limited here.

A side wall of the volute 8 away from the partition plate 9 is provided with an air inlet 6, the air inlet 6 and the spiral axis of the volute 8 are perpendicular, and the air outlet directions of the air outlets 7 of the two volutes 8 are the same. The air outlet 7 of the fan 3 is arranged corresponding to the air inlet 6, and here, in order to ensure that the air inlet 6 and the evaporator 4 can form an optimal negative pressure field.

Fig. 4 is a schematic diagram of the air flow of the fan 3 in the working state represented by the fan 3 of the double-inlet and double-outlet type as an example. The double-inlet and double-outlet fan is optimally selected as a centrifugal fan, so that the fan 3 and the evaporator can be guaranteed. The negative pressure between 4 and 4 is larger, which can also ensure that the entire system can still have sufficient air intake under the condition of limited installation location. The middle partition plate 9 optimally contains the drive motor of the fan 3, and the drive motor is arranged in the The heat-exchanged air flow passages passing through the evaporator 4 can also ensure reliable heat dissipation of the motor. Optimally, the motor is symmetrically installed at the center of the partition plate 9, and the air on both sides of the partition plate 9 does not interfere with each other. Under the drive of the driving motor, the two impellers of the centrifugal fan 3 rotate. Due to the centrifugal force of the air between the fan blade and the volute 8, the static pressure energy of the air is partially converted into velocity energy. At this time, a negative pressure state will be formed at the air inlet 6 of the fan 3. In order to ensure the entire balance, the surrounding air Under the action of negative pressure, it flows through the evaporator 4 to generate a continuous supply of heat source.

The volute 8 of the fan 3 is optimally designed with an involute structure, and the volute tongue 13 of the fan 3 is optimally designed as a structure with a gradually increasing opening, that is, a reverse roll shape, and the impeller of the fan 3 is optimally designed. The gap with the volute 8 of the fan 3 needs to meet the set involute equation relationship, so as to ensure that the negative pressure is sufficient, the fan 3 has less running noise, and the centrifugal fan with double-in and double-out structure The application of 3 ensures that lower noise can still be guaranteed under the requirements of large heating capacity, high energy efficiency and volume limitation.

Further, when used in a heat pump type water heater, in order to obtain high heating energy efficiency, the fan 3 is optimally installed upside down in the upper space of the water tank 1, that is, the average position of the air outlet 7 of the fan 3 is required to be lower than the inlet of the fan 3. Average position of tuyere 6. The two air outlets 7 are arranged side by side in the same direction, so that the air outlet directions are parallel to each other; the height of the air outlet 7 is lower than the height of the air inlet 6 . An air inlet 10 is provided on the housing 2 at a position corresponding to the evaporator 4 , and an air outlet 11 is provided on the housing 2 at a position corresponding to the air outlet 7 . The included angle between the axis of the fan 3 and the axis of the water tank 1 (ie, the vertical centerline) is 90°.

Example 2

Based on Embodiment 1, the present invention also provides a heat pump type water heater, comprising a condenser and a water tank 1, and a heat pump system is provided on the top of the water tank 1;

The heat pump system includes a casing 2 and a fan 3 (ie, the fan 3 described in Embodiment 1), an evaporator 4, a compressor 5 and a throttling device 14 arranged inside the casing 2;

The air outlet of the compressor 5 is connected to the air inlet of the condenser, the liquid outlet of the condenser is connected to the liquid inlet of the throttling device 14, and the liquid outlet of the throttling device 14 is connected to the liquid inlet of the evaporator 4. The air outlet of the compressor 4 is connected to the air inlet of the compressor 5;

The fan 3 is arranged beside the evaporator 4 and is used to extract the air cooled by the evaporator 4, and the air outlet 7 and the air inlet 6 of the fan 3 are both vertical.

The condenser arranged inside the water tank 1 or attached to the wall surface is not shown, and it is included in the range constructed by the peripheral space of the water tank 1 .

Preferably, the compressor 5 is the power element of the system, which can be selected in the form of a scroll type compressor 5, a centrifugal type compressor 5, etc. In a heat pump water heater system, due to the special requirements of the system for superheat, the design of the compressor 5 is also It differs from the compressor 5 for general air conditioners, and is not limited here.

As shown in FIG. 2 , under the framework of the integrated water heater, the heat pump type water heater of the present invention designs the outer cylinder of the water tank 1 and the heat pump assembly in the same range to realize the integration effect of the system. The extra parts outside the system ensure the beauty and integration effect of the whole system, and the optimal utilization of space is also achieved, and there will be no sudden turning points. The preset range shown in the figure is a circle with a certain diameter. In order to meet the aesthetic requirements, other special-shaped shapes can be made in the range, which is not limited here, but the design of the preset range here needs to balance two requirements, one is the space requirement of the heat pump assembly, and the other is the capacity requirement of the water tank 1 (water tank). 1. It should not be too large, because it will cause energy waste if it is too large; it should not be too small, and the hot water capacity will be too small, which will cause impractical problems).

Example 3

Based on Example 1, the evaporators 4 are two sets of plate evaporators arranged in parallel, and are symmetrically arranged on both sides of the partition plate (9) and are opposite to the air inlet (6) of the volute (8).

Preferably, a gap is provided between the air inlet 6 of the fan 3 and the evaporator 4 , and the gap and the wall surface of the volute 8 form a uniform air distribution chamber.

As shown in FIG. 6, in order to ensure that a uniform negative pressure field with less disturbance is constructed between the fan 3 and the evaporator 4, a gap for pressure equalization is included between the air inlet 6 of the fan 3 and the evaporator 4. The fan 3 here is still an example of a double-inlet type fan. The evaporator 4 includes parts that are symmetrically distributed on both sides of the fan 3. Of course, in order to make full use of the heat exchange area, other structures such as double L-shaped and double C-shaped are also included. and

type, etc., the symmetrically arranged part of the evaporator 4 and the air inlet of the fan 3 includes a gap for pressure equalization, and the spacing width of the gap ranges from 30 to 90 mm. In order to ensure that the negative pressure field constructed by the air inlet is more uniform and the disturbance characteristics are smaller, the interval width of the gap is optimally selected as the above range, and the air outlet 7 of the fan 3 is still located closer to the water tank. The position of 1 is not limited here either.

Example 4

Based on Embodiment 1, a grid plate 12 is provided between the fan 3 and the compressor 5 , and the two ends of the grid plate 12 are respectively connected to the evaporators 4 on both sides of the fan 3 . , the grid baffle plate 12 is located at the side of the volute 8 and away from the air outlet of the volute casing, and the compressor 5 is provided on the side of the grid baffle plate 12 away from the air outlet 7 . The thickness of the grid baffle plate 12 is 0.8-1.5 mm.

As shown in FIG. 7 , the evaporator 4 and the fan 3 form the first part of the heat pump assembly, and between the compressor 5 and the first part of the heat pump assembly, a grid baffle 12 is arranged, and the grid baffle plate 12 has a certain thickness range The sheet metal part is connected with the water tank 1 component to form a strong damping structure for shock absorption. For example, the thickness that needs to be met is 0.8 to 1.5 mm. On the one hand, it can meet the strength requirements, and on the other hand, it can also ensure the stiffness and stability of the entire system. Vibration damping effect, of course, the grid baffle 12 is optimally set as a plate structure composed of metal materials such as steel. In order to further ensure that the two moving parts of the fan 3 and the compressor 5 do not interfere with each other, a noise reduction material can be set on it. And so on, in order to further utilize the heat generated by the compressor 5, the baffle plate 12 may be provided with ventilation openings to more effectively utilize the waste heat generated by the compressor 5, which is not limited here.

As shown in FIG. 8 , the compressor 5 can be arranged in an independent space, and it is connected to the water tank 1 through elements such as buffer pads. The grid baffle 12 is also connected to the water tank 1 and is connected to the evaporator 4. The evaporator 4 includes evaporators 4 that are at least partially symmetrically distributed on both sides of the air inlet 6 of the fan 3, and the evaporators 4 are connected in parallel, that is, the refrigerant is basically evenly distributed to the two symmetrically distributed evaporators 4, so that the two The amount of heat exchange generated by the symmetrically arranged evaporators 4 is basically the same, so that the entire system can utilize the ambient heat in the constructed wind field higher. Of course, if the two evaporators 4 are connected in series, that is, the refrigerant first flows through a part to evaporate It is not excluded that the evaporator 4 flows through another part of the evaporator 4, but the overall heating capacity will be slightly smaller.

Example 5

Based on Embodiment 1, the central plane of the evaporator 4 is parallel to the partition plate 9, the axis of the central plane of the evaporator 4 includes a vertical axis and a horizontal axis, and the vertical distance between the vertical axis and the axis of the fan 3 is 0-125 mm, so The vertical distance between the horizontal axis and the axis of the fan 3 is 0-50mm. The central plane is the vertical plane of the center of the evaporator 4, which is parallel to the partition plate 9. At this time, the axis of the central plane is the vertical central line (vertical axis) and the horizontal central line (horizontal axis) of the rectangular plane. Of course, in other scenarios It may be only a symmetrically distributed part of the central plane of the evaporator 4 (eg, C-type, L-type, etc. evaporators 4).

Preferably, the COP of the heat pump system is not lower than 4.0 under standard conditions.

As shown in FIG. 9 , for the symmetrically arranged part of the evaporator 4, the axis of the central plane and the axis of the fan 3 need to be within a preset range. For example, in a special scenario, the symmetrically arranged evaporator 4 includes at least two For the plane part, as shown in Figure 9, its central plane is the vertical plane of the center of the evaporator 4. At this time, the axis of the central plane is also the central line of the rectangular plane. Of course, in other scenarios, it may only be a symmetrically distributed part of the evaporation. The central plane of the evaporator 4 (such as the C-type, L-type evaporator 4, etc.), the vertical distance between the vertical axis and the axis of the fan 3 is 0mm, and the vertical distance between the horizontal axis and the axis of the fan 3 is 0mm. The optimal size of the distance is 0 mm, so that the distribution of the wind field in the entire evaporator 4 can be more uniform, and the average speed of the constructed wind field is more reasonable, which ensures more effective utilization of the environmental energy by the evaporator 4 . Finally, by using the heat pump type water heater of the present invention, it is possible to achieve a high energy efficiency index with an energy efficiency not lower than COP4.0 under standard conditions (meeting the requirements of secondary energy efficiency), a large heating amount of not less than 2500W, and the noise of the whole machine can be maintained. At the level close to 40dB(A), the schematic diagram of the heat pump performance realized by the solution of the present application under different test conditions is shown in Figure 10, that is, the design structure proposed in the present application can solve the space and energy efficiency heating It is of great value for the subsequent popularization and use of heat pumps.

It should be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Include other elements not expressly listed, or which are inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element. The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims

A fan for a heat pump type water heater, comprising a volute (8), a partition plate (9), and an impeller, the impeller being arranged in the volute (8), the rotating shaft of the impeller being located on the helical axis of the volute (8), and It is connected with the drive shaft shaft in the volute (8), and is characterized in that,

The volute (8) has an involute structure, and the volute tongue (13) of the volute is in a reverse roll shape;

Two volutes (8) are provided, the spacer plate (9) is arranged between the two volutes (8), the screw axes of the two volutes (8) are perpendicular to the spacer plate (9), and the two The volutes (8) are symmetrically arranged with the spacer plate (9) as the symmetrical plane;

A side wall of the volute (8) away from the partition plate (9) is provided with an air inlet (6). The air outlet direction of the air outlet (7) is the same.
A heat pump type water heater, characterized in that it comprises a condenser and a water tank (1), and a heat pump system is provided on the top of the water tank (1);

The heat pump system comprises a casing (2), the fan (3) according to claim 1 is arranged inside the casing (2), and an evaporator (4), a compressor (5) and a throttling device are also arranged (14);

The air outlet of the compressor (5) is connected to the air inlet of the condenser, the liquid outlet of the condenser is connected to the liquid inlet of the throttling device (14), and the liquid outlet of the throttling device (14) is connected to the evaporator ( 4), the air outlet of the evaporator (4) is connected with the air inlet of the compressor (5);

The fan (3) is arranged at the side of the evaporator (4), and is used for drawing out the air refrigerated by the evaporator (4).
The heat pump type water heater according to claim 2, wherein the air outlet direction of the two air outlets (7) of the volute (8) is horizontal, and the air outlet (7) is located on the lower side of the air inlet (6).
The heat pump type water heater according to claim 2, wherein the axis of the impeller is horizontal.
The heat pump type water heater according to claim 2, characterized in that, the evaporator (4) is a plate type evaporator, two sets of evaporators (4) are symmetrically arranged on both sides of the partition plate (9), and the evaporator ( The plate surfaces of 4) are respectively opposite to the air inlets (6) of the volute (8).
The heat pump type water heater according to claim 5, characterized in that, the distance between the air inlet (6) and the evaporator (4) is 30-90 mm.
The heat pump type water heater according to claim 5 or 6, characterized in that a grid baffle plate (12) is connected between the two sets of the evaporators (4), the grid baffle plate (12) is arranged vertically, and the grid baffle plate (12) is arranged vertically. The plate (12) is located at the side of the volute (8) and away from the air outlet of the volute, and a compressor (5) is arranged on the side of the grid baffle plate (12) away from the air outlet (7).
The heat pump type water heater according to claim 5 or 6, characterized in that, the vertical distance between the vertical centerline of the evaporator (4) and the axis of the fan (3) is 0-125 mm, and the evaporator (4) is horizontal The horizontal distance between the center line and the axis of the fan (3) is 0-50mm.
The heat pump type water heater according to claim 5 or 6, characterized in that, an air inlet (10) is provided on the casing (2) at a position corresponding to the evaporator (4), and the casing (2) is provided with an air inlet (10). An air outlet (11) is provided on the body (2) at a position corresponding to the air outlet (7).
The heat pump type water heater according to claim 5 or 6, wherein the two sets of plate evaporators are arranged in parallel.