Heat pump water heater

Abstract

The utility model discloses a heat-pump water heater, which relates to the technical field of heat pumps, and comprises a shell, a heat exchanger, a water inlet pipe, a water outlet pipe, a water inlet pipe and a water outlet pipe, an evaporator; the fan is positioned above the evaporator in the height direction; the upstream silencing plate is located between the evaporator and an inlet of the fan in the height direction; the downstream silencing plate is positioned above the outlet of the fan in the height direction; and under the action of the fan, gas entering from the air inlet can sequentially flow through the evaporator, the upstream silencing plate, the fan and the downstream silencing plate. The problem that the fan of the heat-pump water heater is high in noise can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a heat pump water heater. Background Art

[0002] In a system formed by a heat pump water heater such as an air source heat pump water heater, when heating is performed by the heat pump water heater, it is necessary to control the rotation of the fan in the heat pump water heater, so as to accelerate the heat exchange rate between the evaporator and the air through the flow of air. The greater the fan power, the higher the heat exchange rate between the evaporator and the air.

[0003] However, once the fan reaches a certain speed, it will generate a lot of noise. Especially when the heat pump water heater is installed in a residential area, the noise it generates outside the house will affect other residents around, which may cause complaints, which makes it difficult to promote and apply heat pump water heaters. Therefore, how to reduce the noise generated by the fan is an urgent problem to be solved. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present utility model is to provide a heat pump water heater which can solve the problem of high fan noise.

[0005] The specific technical solution of the embodiment of the utility model is:

[0006] A heat pump water heater, comprising:

[0007] A housing, wherein an air inlet is provided on the housing;

[0008] Evaporator;

[0009] a fan located above the evaporator in the height direction;

[0010] An upstream muffler plate, wherein the upstream muffler plate is located between the evaporator and the inlet of the fan in the height direction;

[0011] A downstream silencer plate, wherein the downstream silencer plate is located above the outlet of the fan in the height direction; under the action of the fan, the gas entering from the air inlet can flow through the evaporator, the upstream silencer plate, the outlet of the fan and the downstream silencer plate in sequence.

[0012] Preferably, the height difference between the end of the upstream silencer plate close to the inlet of the fan and the inlet of the fan is greater than or equal to the height of the upstream silencer plate;

[0013] and / or,

[0014] A height difference between an end of the downstream silencer plate close to the outlet of the fan and the outlet of the fan is greater than or equal to a height of the downstream silencer plate.

[0015] Preferably, the number of the upstream silencer plates is plural, and the width of the upstream silencer plates in the horizontal direction is greater than or equal to 1 / 75 of the diameter of the circle formed when the fan blades rotate and less than 1 / 2 of the diameter of the circle formed when the fan blades rotate;

[0016] and / or,

[0017] There are multiple downstream silencers, and the width of the downstream silencers in the horizontal direction is greater than or equal to 1 / 75 of the diameter of the circle formed when the fan blades rotate and less than 1 / 2 of the diameter of the circle formed when the fan blades rotate.

[0018] Preferably, the longitudinal section of the upstream silencer plate is arc-shaped;

[0019] and / or,

[0020] The longitudinal section of the downstream silencer plate is arc-shaped.

[0021] Preferably, the arc shape includes an elliptical arc shape or a circular arc shape;

[0022] When the arc is a circular arc, the central angle of the circular arc is not greater than 90 degrees;

[0023] When the arc is an elliptical arc, the elliptical arc is a relatively short arc between one end of the major axis and one end of the minor axis of the corresponding ellipse.

[0024] Preferably, a tangent line of the end of the upstream silencer plate close to the inlet of the fan faces the inlet of the fan;

[0025] and / or,

[0026] A tangent line of an end of the downstream silencer plate close to the outlet of the fan faces the outlet of the fan.

[0027] Preferably, the fan is an axial flow fan;

[0028] The tangent line of the end of the upstream silencer plate close to the inlet of the fan is parallel to the axis of the rotating shaft of the fan;

[0029] and / or,

[0030] A tangent line of the end of the downstream silencer plate close to the outlet of the fan is parallel to the axis of the rotating shaft of the fan.

[0031] Preferably, there are a plurality of upstream silencer plates, and the plurality of upstream silencer plates are spaced apart in the transverse direction to form a first group of upstream silencer plates;

[0032] and / or,

[0033] There are multiple downstream silencer plates, and the multiple downstream silencer plates are spaced apart in the transverse direction to form a first group of downstream silencer plates.

[0034] Preferably, at the same height, the sum of the gas flow cross-sectional areas between the plurality of upstream silencer plates is greater than or equal to the area of ​​the circle formed when the blades of the fan rotate.

[0035] Preferably, the number of the upstream silencer plates is multiple, at a first preset height, some of the upstream silencer plates are arranged at intervals in the transverse direction to form a first group of upstream silencer plates, and at a second preset height, another part of the upstream silencer plates are arranged at intervals in the transverse direction to form a second group of upstream silencer plates, and the first preset height is higher than the second preset height;

[0036] and / or,

[0037] There are multiple downstream silencer plates. At a third preset height, some of the downstream silencer plates are spaced apart in the transverse direction to form a first group of downstream silencer plates. At a fourth preset height, another part of the downstream silencer plates are spaced apart in the transverse direction to form a second group of downstream silencer plates. The third preset height is higher than the fourth preset height.

[0038] Preferably, the plurality of upstream silencer plates are mirror-symmetrical about the longitudinal section where the center line of the shell is located;

[0039] and / or,

[0040] The plurality of downstream silencer panels are mirror-symmetrical about the longitudinal section where the center line of the shell is located.

[0041] Preferably, the plurality of upstream silencer plates are sequentially divided into a plurality of regions in the circumferential direction around the axis of the shell, and the upstream silencer plates in the plurality of regions are rotationally symmetric with respect to the axis of the shell;

[0042] and / or,

[0043] The plurality of downstream silencer plates are sequentially divided into a plurality of regions in a circumferential direction around the axis of the shell, and the downstream silencer plates in the plurality of regions are rotationally symmetric with respect to the axis of the shell.

[0044] Preferably, the upper end and the lower end of the upstream silencer plates in the first group of upstream silencer plates are flush, and the upper end and the lower end of the upstream silencer plates in the second group of upstream silencer plates are flush,

[0045] and / or,

[0046] The upper ends and lower ends of the downstream silencer plates in the first group of downstream silencer plates are flush with each other, and the upper ends and lower ends of the downstream silencer plates in the second group of downstream silencer plates are flush with each other.

[0047] Preferably, the height difference between the lower ends of the first group of upstream silencer plates and the upper ends of the second group of upstream silencer plates is greater than or equal to 0.8 of the height of the second group of upstream silencer plates in the vertical direction;

[0048] and / or,

[0049] A height difference between lower ends of the first group of downstream silencer panels and upper ends of the second group of downstream silencer panels is greater than or equal to 0.8 of the height of the second group of downstream silencer panels in the vertical direction.

[0050] Preferably, the upstream silencer plates in the first group of upstream silencer plates and the upstream silencer plates in the second group of upstream silencer plates are staggered in the transverse direction;

[0051] and / or,

[0052] The downstream sound-absorbing panels in the first group of downstream sound-absorbing panels and the downstream sound-absorbing panels in the second group of downstream sound-absorbing panels are staggered in a transverse direction.

[0053] Preferably, a lateral projection of at least one upstream silencer plate in the first group of upstream silencer plates can completely cover a lateral projection of a gap between adjacent upstream silencer plates in the corresponding second group of upstream silencer plates;

[0054] and / or,

[0055] The lateral projection of the downstream silencer panels in the first group of downstream silencer panels can completely cover the lateral projection of the gaps between adjacent downstream silencer panels in the second group of downstream silencer panels.

[0056] Preferably, the longitudinal section of the upstream silencer plate is arc-shaped, and the arc direction of the upstream silencer plates in the first group of upstream silencer plates is opposite to the arc direction of the upstream silencer plates in the second group of upstream silencer plates;

[0057] and / or,

[0058] The longitudinal section of the downstream silencer plate is arc-shaped, and the arc direction of the downstream silencer plates in the first group of downstream silencer plates is opposite to the arc direction of the downstream silencer plates in the second group of downstream silencer plates.

[0059] Preferably, the first group of upstream silencer plates is closer to the inlet of the fan than the second group of upstream silencer plates, and the tangent of the end of the upstream silencer plates in the first group of upstream silencer plates close to the fan faces the inlet of the fan, and the tangent of the end of the upstream silencer plates in the second group of upstream silencer plates away from the fan faces the air inlet;

[0060] and / or,

[0061] An air outlet is provided on the shell, and the first group of downstream silencer plates is closer to the outlet of the fan than the second group of downstream silencer plates. The tangent of the end of the downstream silencer plates in the first group of downstream silencer plates close to the fan is toward the outlet of the fan, and the tangent of the end of the downstream silencer plates in the second group of downstream silencer plates away from the fan is toward the air outlet.

[0062] Preferably, the upstream sound-absorbing plate comprises a first outer shell having a first cavity and a sound-absorbing material arranged in the first cavity.

[0063] and / or,

[0064] The downstream sound-absorbing plate includes a second outer shell having a second cavity and a sound-absorbing material disposed in the second cavity.

[0065] and / or,

[0066] The surface of the upstream sound-absorbing plate is provided with a sound-absorbing layer made of sound-absorbing material.

[0067] and / or,

[0068] A sound absorbing layer made of sound absorbing material is arranged on the surface of the downstream sound absorbing plate.

[0069] Preferably, the shell further includes a compressor and a condensing heat exchanger located below the evaporator in the height direction.

[0070] Preferably, the housing has a first side wall and a second side wall that are arranged opposite to each other.

[0071] Two ends of the upstream muffler plate are respectively connected to the first side wall and the second side wall;

[0072] Two ends of the downstream silencer plate are respectively connected to the first side wall and the second side wall.

[0073] The technical solution of the utility model has the following significant beneficial effects:

[0074] When the heat pump water heater is running, the fan rotates to increase the heat absorption rate of the evaporator and emits noise at the same time. Downward propagation and upward propagation are the two main propagation directions of the fan noise. The noise will be transmitted downward through the inlet of the fan and the air inlet of the shell, and at the same time, the noise will be transmitted upward through the outlet of the fan. At this time, since an upstream silencer is provided between the evaporator and the inlet of the fan, the upstream silencer can effectively reduce the decibel of the noise transmitted from the air inlet of the shell; in addition, since a downstream silencer is provided above the outlet of the fan in the height direction, the downstream silencer can effectively reduce the decibel of the noise transmitted upward from the outlet of the fan. The above method effectively reduces the decibel of the noise of the fan transmitted to the outside of the shell, thereby improving the user experience.

[0075] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Features described and / or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0077] Figure 1 This is a front view of a heat pump water heater in an embodiment of the utility model;

[0078] Figure 2 for Figure 1 Side view of a heat pump water heater;

[0079] Figure 3 It is a schematic structural diagram of a fan, an upstream muffler plate and a downstream muffler plate in a heat pump water heater in an embodiment of the utility model under a first implementation mode;

[0080] Figure 4 It is a schematic structural diagram of a fan, an upstream muffler plate and a downstream muffler plate in a heat pump water heater in an embodiment of the utility model under a second implementation mode;

[0081] Figure 5 It is a schematic structural diagram of a fan, an upstream muffler plate and a downstream muffler plate in a heat pump water heater in an embodiment of the utility model under a third implementation mode;

[0082] Figure 6 It is a structural schematic diagram of a fan, an upstream muffler plate and a downstream muffler plate in a heat pump water heater in an embodiment of the utility model under a fourth implementation mode;

[0083] Figure 7 It is a longitudinal cross-sectional schematic diagram of the upstream silencer plate and the downstream silencer plate in the first embodiment of the utility model;

[0084] Figure 8 It is a longitudinal cross-sectional schematic diagram of the upstream silencer plate and the downstream silencer plate in the embodiment of the utility model under the second implementation mode;

[0085] Fig. 9 It is a schematic longitudinal section diagram of the upstream silencer plate and the downstream silencer plate in the third implementation manner in the embodiment of the utility model.

[0086] Reference numerals of the above drawings:

[0087] 1. Shell; 11. Air inlet; 12. Air outlet; 13. First side wall; 14. Second side wall; 2. Evaporator; 3. Fan; 4. Upstream silencer; 41. First group of upstream silencer; 42. Second group of upstream silencer; 5. Downstream silencer; 51. First group of downstream silencer; 52. Second group of downstream silencer; 6. Compressor; 7. Condensing heat exchanger; 8. Area. DETAILED DESCRIPTION

[0088] In combination with the accompanying drawings and the description of the specific embodiments of the present invention, the details of the present invention can be more clearly understood. However, the specific embodiments of the present invention described herein are only used to explain the purpose of the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as "disposed on" another element, it can be directly on the other element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0089] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0090] In order to solve the problem of high noise from the fan 3, a heat pump water heater is provided in the embodiment of the present application. Figure 1 This is a front view of a heat pump water heater in an embodiment of the utility model. Figure 2 for Figure 1 Side view of a heat pump water heater. Figure 3 FIG. 1 is a schematic diagram of the structure of the fan, the upstream muffler plate 4 and the downstream muffler plate 5 in the heat pump water heater in the embodiment of the utility model in the first embodiment. Figures 1 to 3 As shown, the heat pump water heater may include: a shell 1, on which an air inlet 11 is arranged; an evaporator 2 and a fan 3 arranged in the shell 1 and located above the evaporator 2 in the height direction; an upstream silencer 4, which is located between the evaporator 2 and the inlet of the fan 3 in the height direction; a downstream silencer 5, which is located above the outlet of the fan 3 in the height direction; under the action of the fan 3, the gas entering through the air inlet 11 can flow through the evaporator 2, the upstream silencer 4 and be discharged after passing through the outlet of the fan 3 and the downstream silencer 5.

[0091] When the heat pump water heater is running, the fan 3 rotates to increase the heat absorption rate of the evaporator 2 and emits noise at the same time. The applicant has found that for the heat pump water heater, compared with the horizontal transmission to the left and right, the downward transmission and the upward transmission are the two main transmission directions of the fan noise transmission. The noise will be transmitted downward through the inlet of the fan 3 and the air inlet 11 of the shell 1. In addition, the noise will be transmitted upward through the outlet of the fan 3. At this time, since an upstream silencer plate 4 is provided between the evaporator 2 and the inlet of the fan 3, the upstream silencer plate 4 can effectively reduce the decibel of the noise transmitted from the air inlet 11 of the shell 1; in addition, since a downstream silencer plate 5 is provided above the outlet of the fan 3 in the height direction, the downstream silencer plate 5 can effectively reduce the decibel of the noise transmitted upward from the outlet of the fan 3. The above method effectively reduces the decibel of the noise of the fan 3 transmitted to the outside of the shell 1, thereby improving the user experience.

[0092] In order to better understand the heat pump water heater in the embodiment of the present application, further explanation and description will be given below. Figure 1 and Figure 2As shown, the shell 1 is provided with an air inlet 11, which is generally located in the middle, lower middle or lower part of the shell 1, and the outside air can enter the inside of the shell 1 through the air inlet 11. The shell 1 generally extends in the vertical direction, and the upper part of the shell 1 is used to discharge the air entering the inside of the shell 1, such as the upper part of the shell 1 can be provided with an air outlet 12. The evaporator 2 is used to exchange heat with the air, so as to achieve heat absorption of the refrigerant flowing through the evaporator 2.

[0093] In some embodiments, the fan 3 can be arranged inside the housing 1 or outside the housing 1, as long as the inlet and outlet of the fan 3 are connected to the housing 1 respectively. The fan 3 can be located above the evaporator 2 in the height direction. The upstream silencer 4 is located between the evaporator 2 and the inlet of the fan 3 in the height direction. When the fan 3 rotates, the external gas enters the inlet of the fan 3 after passing through the air inlet 11, the evaporator 2, and the upstream silencer 4 in sequence. The downstream silencer 5 is located above the outlet of the fan 3 in the height direction, and the gas discharged from the outlet of the fan 3 flows through the downstream silencer 5 and is discharged to the outside. The housing 1 may also include a compressor 6 and a condensing heat exchanger 7 located below the evaporator 2 in the height direction. The heat pump water heater may also include a throttling unit. The compressor 6, the condenser, the throttling unit, and the evaporating heat exchanger form a heat pump system.

[0094] As feasible, Figure 2 As shown, the housing 1 may have a first side wall 13 and a second side wall 14 arranged opposite to each other, and the two ends of the upstream muffler plate 4 are respectively connected to the first side wall 13 and the second side wall 14; the two ends of the downstream muffler plate 5 are respectively connected to the first side wall 13 and the second side wall 14. The upstream muffler plate 4 and the downstream muffler plate 5 can be fixedly installed in the above manner. The horizontal cross-section of the housing 1 can be in various shapes, such as circular, rectangular and other polygonal shapes, etc., which are not limited in the present application.

[0095] As feasible, Figure 7 It is a longitudinal cross-sectional schematic diagram of the upstream silencer plate and the downstream silencer plate in the first embodiment of the utility model, Figure 8 Schematic diagram of the longitudinal section of the upstream silencer plate and the downstream silencer plate in the second embodiment of the utility model. Figure 7 and Figure 8As shown, the longitudinal section of the upstream silencer 4 can be roughly arc-shaped. And / or, the longitudinal section of the downstream silencer 5 can be roughly arc-shaped. Through the above-mentioned method, not only can the upstream silencer 4 and the downstream silencer 5 have a redirecting effect on the gas flowing through, but also it has a certain reduction effect on the noise emitted by the fan 3 and the resistance to the gas is relatively small. Since in the heat pump water heater, the fan 3 is used to drive the gas to accelerate the flow through the evaporator, thereby increasing the heat exchange rate between the gas and the refrigerant in the evaporator, the faster the gas speed, the higher the heat exchange rate between the gas and the refrigerant in the evaporator. Therefore, the upstream silencer 4 and the downstream silencer 5 are set to ensure the noise reduction effect, and cannot form a large resistance to the flow of the gas, affecting the heat exchange rate between the refrigerant in the evaporator 2 and the air, so as to achieve the noise reduction effect under the premise of ensuring the reliable operation of the unit.

[0096] Of course, in other possible implementations, Fig. 9 FIG. 1 is a schematic longitudinal section diagram of an upstream silencer plate and a downstream silencer plate in a third embodiment of the utility model. Fig. 9 As shown, the longitudinal section of the sound-absorbing plate can also be in a straight line or other shapes.

[0097] When the heat pump water heater is running, the fan 3 rotates and makes noise, most of which will be transmitted downward through the inlet of the fan 3 and the air inlet 11 of the housing 1, and at the same time, the noise will be transmitted upward through the outlet of the fan 3. Since the fan 3 is arranged in the housing 1, the noise generated by the fan 3 is weakened to a certain extent by the housing 1 due to the existence of the housing 1, so the decibel of the noise transmitted to the outside in other directions is relatively small.

[0098] Since an upstream muffler plate 4 is provided between the evaporator 2 and the inlet of the fan 3, the upstream muffler plate 4 can effectively reduce the decibel of the noise transmitted from the air inlet 11 of the housing 1. Since a downstream muffler plate 5 is provided above the outlet of the fan 3 in the height direction, the downstream muffler plate 5 can effectively reduce the decibel of the noise transmitted upward from the outlet of the fan 3. In the above manner, the decibel of the noise of the fan 3 transmitted to the outside of the housing 1 is effectively reduced, thereby improving the user experience.

[0099] like Figure 3As shown, the height difference H1 between the end of the upstream silencer plate 4 close to the inlet of the fan 3 and the inlet of the fan 3 can be greater than or equal to the height of the upstream silencer plate 4. Since the gas is blocked or redirected by the upstream silencer plate 4 just after passing through the upstream silencer plate 4, its flow state is turbulent, so a certain distance is required to reduce the turbulence intensity before entering the inlet of the fan 3, thereby reducing resistance and noise. Similarly, the height difference H2 between the end of the downstream silencer plate 5 close to the outlet of the fan 3 and the outlet of the fan 3 can be greater than or equal to the height of the downstream silencer plate 5. Since the gas is also in a turbulent state when it just flows out of the outlet of the fan 3 after being pressurized by the fan 3, a certain distance is required to reduce the turbulence intensity before flowing through the downstream silencer plate 5, thereby reducing resistance and noise.

[0100] Generally speaking, there are multiple upstream silencer plates 4, which are spaced apart in the transverse direction to form a first group of upstream silencer plates 41. And / or, there are multiple downstream silencer plates 5, which are spaced apart in the transverse direction to form a first group of downstream silencer plates 51.

[0101] As a feasible method, in order to reduce the number of upstream silencer plates 4 as much as possible on the basis of ensuring noise reduction so as to improve production efficiency, when there are multiple upstream silencer plates 4, the width W1 of the upstream silencer plates 4 in the horizontal direction can be greater than or equal to 1 / 75 of the diameter of the circle formed when the fan blades 3 rotate and less than 1 / 2 of the diameter of the circle formed when the fan blades 3 rotate. Similarly, as a feasible method, when there are multiple downstream silencer plates 5, the width W2 of the downstream silencer plates 5 in the horizontal direction can also be greater than or equal to 1 / 75 of the diameter of the circle formed when the fan blades 3 rotate and less than 1 / 2 of the diameter of the circle formed when the fan blades 3 rotate.

[0102] In some embodiments, Figure 7 and Figure 8 As shown, the arc may include an elliptical arc or a circular arc, and of course may include other types of arcs, which are not limited in the present application. When the arc is a circular arc, the center angle of the circular arc is not greater than 90 degrees, so that the resistance of the muffler to the gas can be reduced and it is ensured that the gas will not flow back in some positions. Similarly, when the arc is an elliptical arc, the elliptical arc can be a relatively short arc between one end of the major axis and one end of the minor axis of the corresponding ellipse.

[0103] As feasible, Figure 3As shown, the tangent line of the end of the upstream silencer plate 4 close to the inlet of the fan 3 can be generally oriented toward the inlet of the fan 3, so that the gas after passing through the upstream silencer plate 4 can flow into the fan 3 relatively in a direction close to the axis of the fan 3 to reduce resistance and noise. Further, the fan 3 can be an axial flow fan 3, and the tangent line of the end of the upstream silencer plate 4 close to the inlet of the fan 3 is parallel to the axis of the rotating shaft of the fan 3.

[0104] Similarly, the tangent line of the end of the downstream silencer plate 5 close to the outlet of the fan 3 can be generally oriented toward the outlet of the fan 3, so that the gas output from the outlet of the fan 3 can flow into the downstream silencer plate 5 in a direction close to the axis of the fan 3 to reduce resistance and noise. Further, the tangent line of the end of the downstream silencer plate 5 close to the outlet of the fan 3 is parallel to the axis of the rotating shaft of the fan 3.

[0105] At the same height, the sum of the gas flow cross-sectional areas between the multiple upstream silencer plates 4 is greater than or equal to the area of ​​the circle formed when the blades of the fan 3 rotate, which can ensure that there is sufficient gas flow cross-sectional area between the multiple upstream silencer plates 4 to ensure the air intake volume and reduce the air intake resistance.

[0106] When there are multiple upstream silencer plates 4, Figure 4 FIG. 1 is a schematic diagram of the structure of the fan, the upstream muffler plate 4 and the downstream muffler plate 5 in the heat pump water heater in the embodiment of the utility model under the second embodiment. Figure 4 As shown, at a first preset height, part of the upstream silencer plates 4 are arranged at intervals in the transverse direction to form a first group of upstream silencer plates 41, and at a second preset height, another part of the upstream silencer plates 4 are arranged at intervals in the transverse direction to form a second group of upstream silencer plates 42, and the first preset height is higher than the second preset height. The gas entering the air inlet 11 can flow through the evaporator 2, the second group of upstream silencer plates 42 and the first group of upstream silencer plates 41 in sequence and then enter the outlet of the fan 3. Through the above structure, two groups of upstream silencer plates 4 or more groups of upstream silencer plates 4 can be arranged in the height direction to further reduce the decibel of the noise transmitted from the air inlet 11 of the housing 1.

[0107] Similarly, when there are multiple downstream silencer plates 5, at the third preset height, some of the downstream silencer plates 5 are spaced apart in the transverse direction to form a first group of downstream silencer plates 51, and at the fourth preset height, another part of the downstream silencer plates 5 are spaced apart in the transverse direction to form a second group of downstream silencer plates 52, and the third preset height is higher than the fourth preset height. The gas discharged through the outlet of the fan 3 needs to pass through the second group of downstream silencer plates 52 and the first group of downstream silencer plates 51 in sequence before being discharged to the outside. Through the above structure, two groups of downstream silencer plates 5 or more groups of downstream silencer plates 5 can be set in the height direction to further effectively reduce the decibel of the noise transmitted upward from the outlet of the fan 3.

[0108] As feasible, Figure 4 As shown, the upper and lower ends of the upstream silencer plates 4 in the first group of upstream silencer plates 41 are flush, and the upper and lower ends of the upstream silencer plates 4 in the second group of upstream silencer plates 42 are flush. The upper and lower ends of the downstream silencer plates 5 in the first group of downstream silencer plates 51 are flush, and the upper and lower ends of the downstream silencer plates 5 in the second group of downstream silencer plates 52 are flush. Of course, in other feasible embodiments, the upper and lower ends of the silencer plates may not be flush, and this is not limited in the present application.

[0109] In the above structure, the height difference H3 between the lower end of the first group of upstream silencer plates 41 and the upper end of the second group of upstream silencer plates 42 can be greater than or equal to 0.8 of the height of the second group of upstream silencer plates 42 in the vertical direction. Through the above structure, there can be a sufficient height difference between the lower end of the first group of upstream silencer plates 41 and the upper end of the second group of upstream silencer plates 42 so that the gas flowing from the upper end of the second group of upstream silencer plates 42 is adjusted to be closer to a steady flow state, thereby reducing resistance and noise.

[0110] Similarly, the height difference H4 between the lower ends of the first group of downstream silencer plates 51 and the upper ends of the second group of downstream silencer plates 52 may be greater than or equal to 0.8 of the height of the second group of downstream silencer plates 52 in the vertical direction.

[0111] As feasible, Figure 4 As shown, the upstream sound-absorbing plates 4 in the first group of upstream sound-absorbing plates 41 and the upstream sound-absorbing plates 4 in the second group of upstream sound-absorbing plates 42 can be staggered in the horizontal direction. In this way, the possibility of the noise passing through the gap between two adjacent upstream sound-absorbing plates 4 in the second group of upstream sound-absorbing plates 42 and encountering the upstream sound-absorbing plates 4 in the first group of upstream sound-absorbing plates 41 can be increased, so that the upstream sound-absorbing plates 4 in the first group of upstream sound-absorbing plates 41 can absorb and reduce the noise, and finally further reduce the decibel of the noise transmitted from the air inlet 11 of the shell 1.

[0112] Similarly, the downstream silencer plates 5 in the first group of downstream silencer plates 51 and the downstream silencer plates 5 in the second group of downstream silencer plates 52 may also be staggered in the transverse direction, thereby further reducing the decibel of the noise emitted upward from the outlet of the fan 3 .

[0113] Furthermore, the lateral projection of at least one upstream silencer plate 4 in the first group of upstream silencer plates 41 can completely cover the lateral projection of the gap between the adjacent upstream silencer plates 4 in the corresponding second group of upstream silencer plates 42. In this way, the possibility that the noise passing through the gap between two adjacent upstream silencer plates 4 in the second group of upstream silencer plates 42 encounters the upstream silencer plates 4 in the first group of upstream silencer plates 41 can be further increased.

[0114] Similarly, the lateral projection of the downstream silencer plates 5 in the first group of downstream silencer plates 51 can completely cover the lateral projection of the gaps between adjacent downstream silencer plates 5 in the second group of downstream silencer plates 52 .

[0115] When the longitudinal section of the upstream muffler plate 4 is arc-shaped, Figure 4 As shown, the arc direction of the upstream silencer plate 4 in the first group of upstream silencer plates 41 is opposite to the arc direction of the upstream silencer plate 4 in the second group of upstream silencer plates 42. With the above structure, after the gas passes through the second group of upstream silencer plates 42 and is deflected at a certain angle, it can be deflected back in the opposite direction when passing through the first group of upstream silencer plates 41, so that the gas finally enters the inlet of the fan 3 with a smaller angle relative to the axis of the fan 3. Furthermore, the gas can reach a parallel state relative to the axis of the fan 3 when entering the inlet of the fan 3.

[0116] Similarly, when the longitudinal section of the downstream silencer plate 5 is arc-shaped, the arc direction of the downstream silencer plate 5 in the first group of downstream silencer plates 51 is opposite to the arc direction of the downstream silencer plate 5 in the second group of downstream silencer plates 52. The above structure can ultimately make the flow direction of the gas after passing through the first group of downstream silencer plates 51 basically the same as the flow direction of the gas before entering the second group of downstream silencer plates 52, and the gas flow direction will not be deflected by too large an angle.

[0117] As feasible, Figure 4 As shown, the first group of upstream silencer plates 41 is closer to the inlet of the fan 3 than the second group of upstream silencer plates 42, the tangent of the end of the upstream silencer plates 4 in the first group of upstream silencer plates 41 close to the fan 3 is toward the inlet of the fan 3, and the tangent of the end of the upstream silencer plates 4 in the second group of upstream silencer plates 42 away from the fan 3 is toward the air inlet 11. The above method can effectively reduce the resistance of the upstream silencer plates 4 to the gas, and at the same time make the flow direction of the gas after passing through the upstream silencer plates 4 basically consistent with the inlet of the fan 3.

[0118] Similarly, the first group of downstream silencer plates 51 is closer to the outlet of the fan 3 than the second group of downstream silencer plates 52, the tangent of the end of the downstream silencer plates 5 in the first group of downstream silencer plates 51 close to the fan 3 is toward the outlet of the fan 3, and the tangent of the end of the downstream silencer plates 5 in the second group of downstream silencer plates 52 away from the fan 3 is toward the air outlet 12. In the above manner, the resistance of the downstream silencer plates 5 to the gas can be effectively reduced, and the flow direction of the gas after passing through the downstream silencer plates 5 is basically consistent with the air outlet 12.

[0119] In some embodiments, Figure 5 FIG. 1 is a schematic diagram of the structure of the fan, the upstream muffler plate 4 and the downstream muffler plate 5 in the heat pump water heater in the embodiment of the utility model under the third implementation mode, as shown in FIG. Figure 5As shown, the multiple upstream silencer plates 4 can be mirror-symmetrical with respect to the longitudinal section where the center line of the shell 1 is located. For example, the first group of upstream silencer plates 41 can be mirror-symmetrical with respect to the longitudinal section where the center line of the shell 1 is located, and similarly, the second group of upstream silencer plates 42 can also be mirror-symmetrical with respect to the longitudinal section where the center line of the shell 1 is located. Through the above structure, the resistance of the upstream silencer plates 4 to the gas can be further reduced. Similarly, the multiple downstream silencer plates 5 can also be mirror-symmetrical with respect to the longitudinal section where the center line of the shell 1 is located.

[0120] In some embodiments, Figure 6 FIG. 1 is a schematic diagram of the structure of the fan, the upstream muffler plate 4 and the downstream muffler plate 5 in the heat pump water heater in the embodiment of the utility model in the fourth embodiment. Figure 6 As shown, the multiple upstream silencer plates 4 are sequentially divided into multiple regions 8 in the circumferential direction around the axis of the shell 1, and the upstream silencer plates 4 in the multiple regions 8 are rotationally symmetrical with the axis of the shell 1. The above method can reduce the resistance of the upstream silencer plates 4 to the gas. For example, the first group of upstream silencer plates 41 and / or the second group of upstream silencer plates 42 can be sequentially divided into four regions 8 in the circumferential direction around the axis of the shell 1, and the upstream silencer plates 4 in the four regions 8 are rotationally symmetrical with the axis of the shell 1.

[0121] Furthermore, in the second group of upstream silencer plates 42, the upstream silencer plates 4 of each area 8 are all oriented toward the adjacent area 8 in the same clockwise or counterclockwise direction, so that the gas can generate a rotating flow centered on the axis of the shell 1 when flowing through the upstream silencer plates 4, thereby further reducing the resistance of the upstream silencer plates 4 to the gas.

[0122] Similarly, the multiple downstream silencer plates 5 are sequentially divided into multiple regions 8 in the circumferential direction around the axis of the shell 1, and the downstream silencer plates 5 in the multiple regions 8 are rotationally symmetric with the axis of the shell 1. The above method can reduce the resistance of the downstream silencer plates 5 to the gas. For example, the first group of downstream silencer plates 51 and / or the second group of downstream silencer plates 52 can be sequentially divided into four regions 8 in the circumferential direction around the axis of the shell 1, and the downstream silencer plates 5 in the four regions 8 are rotationally symmetric with the axis of the shell 1.

[0123] In order to further improve the noise reduction effect of the sound-absorbing plate, in a feasible embodiment, the upstream sound-absorbing plate 4 may include a first outer shell 1 having a first cavity and a sound-absorbing material disposed in the first cavity. Similarly, the downstream sound-absorbing plate 5 may include a second outer shell 1 having a second cavity and a sound-absorbing material disposed in the second cavity.

[0124] In another feasible embodiment, a sound absorbing layer made of a sound absorbing material may be provided on the surface of the upstream sound absorbing plate 4. Similarly, a sound absorbing layer made of a sound absorbing material may be provided on the surface of the downstream sound absorbing plate 5. The sound absorbing material may include any sound absorbing material in the prior art, and is not limited in this application.

[0125] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of ... " describing a combination should include determined elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps here also contemplates the implementation method consisting essentially of these elements, ingredients, parts or steps. Here, by using the term "may", it is intended to illustrate that any attribute described that "may" includes is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "one" used to describe an element, ingredient, part or step is not said to exclude other elements, ingredients, parts or steps.

[0126] The above are only several embodiments of the present invention. Although the embodiments disclosed by the present invention are as above, the above contents are only embodiments adopted for facilitating the understanding of the present invention and are not used to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modification and change in the form and details of the embodiments without departing from the spirit and scope disclosed by the present invention, but the scope of patent protection of the present invention shall still be subject to the scope defined by the attached claims.

Claims

1. A heat pump water heater, characterized in that: The heat pump water heater comprises: A housing, wherein an air inlet is provided on the housing; Evaporator; a fan located above the evaporator in the height direction; An upstream muffler plate, wherein the upstream muffler plate is located between the evaporator and the inlet of the fan in the height direction; A downstream silencer plate, wherein the downstream silencer plate is located above the outlet of the fan in the height direction; under the action of the fan, the gas entering from the air inlet can flow through the evaporator, the upstream silencer plate, the outlet of the fan and the downstream silencer plate in sequence.

2. The heat pump water heater according to claim 1, characterized in that: The height difference between the end of the upstream silencer plate close to the inlet of the fan and the inlet of the fan is greater than or equal to the height of the upstream silencer plate; and / or, A height difference between an end of the downstream silencer plate close to the outlet of the fan and the outlet of the fan is greater than or equal to a height of the downstream silencer plate.

3. The heat pump water heater according to claim 1, characterized in that: The number of the upstream silencer plates is plural, and the width of the upstream silencer plates in the horizontal direction is greater than or equal to 1 / 75 of the diameter of the circle formed when the fan blades rotate and less than 1 / 2 of the diameter of the circle formed when the fan blades rotate; and / or, There are multiple downstream silencers, and the width of the downstream silencers in the horizontal direction is greater than or equal to 1 / 75 of the diameter of the circle formed when the fan blades rotate and less than 1 / 2 of the diameter of the circle formed when the fan blades rotate.

4. The heat pump water heater according to claim 1, characterized in that: The longitudinal section of the upstream muffler plate is arc-shaped; and / or, The longitudinal section of the downstream silencer plate is arc-shaped.

5. The heat pump water heater according to claim 4, characterized in that: The arc shape includes an elliptical arc shape or a circular arc shape; When the arc is a circular arc, the central angle of the circular arc is not greater than 90 degrees; When the arc is an elliptical arc, the elliptical arc is a relatively short arc between one end of the major axis and one end of the minor axis of the corresponding ellipse.

6. The heat pump water heater according to claim 4, characterized in that: A tangent line of the end of the upstream silencer plate close to the inlet of the fan faces the inlet of the fan; and / or, A tangent line of an end of the downstream silencer plate close to the outlet of the fan faces the outlet of the fan.

7. The heat pump water heater according to claim 6, characterized in that: The fan is an axial flow fan; The tangent line of the end of the upstream silencer plate close to the inlet of the fan is parallel to the axis of the rotating shaft of the fan; and / or, A tangent line of the end of the downstream silencer plate close to the outlet of the fan is parallel to the axis of the rotating shaft of the fan.

8. The heat pump water heater according to claim 1, characterized in that: There are multiple upstream silencer plates, and the multiple upstream silencer plates are spaced apart in the transverse direction to form a first group of upstream silencer plates; and / or, There are multiple downstream silencer plates, and the multiple downstream silencer plates are spaced apart in the transverse direction to form a first group of downstream silencer plates.

9. The heat pump water heater according to claim 1, characterized in that: At the same height, the sum of the gas flow cross-sectional areas between the plurality of upstream silencer plates is greater than or equal to the area of ​​the circle formed when the blades of the fan rotate.

10. The heat pump water heater according to claim 1, characterized in that: The number of the upstream silencer plates is multiple, at a first preset height, some of the upstream silencer plates are arranged at intervals in the transverse direction to form a first group of upstream silencer plates, and at a second preset height, another part of the upstream silencer plates are arranged at intervals in the transverse direction to form a second group of upstream silencer plates, and the first preset height is higher than the second preset height; and / or, There are multiple downstream silencer plates. At a third preset height, some of the downstream silencer plates are spaced apart in the transverse direction to form a first group of downstream silencer plates. At a fourth preset height, another part of the downstream silencer plates are spaced apart in the transverse direction to form a second group of downstream silencer plates. The third preset height is higher than the fourth preset height.

11. The heat pump water heater according to claim 8 or 10, characterized in that: The plurality of upstream silencer plates are mirror-symmetrical about the longitudinal section where the center line of the shell is located; and / or, The plurality of downstream silencer panels are mirror-symmetrical about the longitudinal section where the center line of the shell is located.

12. The heat pump water heater according to claim 8 or 10, characterized in that: The plurality of upstream silencer plates are sequentially divided into a plurality of regions in a circumferential direction around the axis of the shell, and the upstream silencer plates in the plurality of regions are rotationally symmetric with respect to the axis of the shell; and / or, The plurality of downstream silencer plates are sequentially divided into a plurality of regions in a circumferential direction around the axis of the shell, and the downstream silencer plates in the plurality of regions are rotationally symmetric with respect to the axis of the shell.

13. The heat pump water heater according to claim 10, characterized in that: The upper end and the lower end of the upstream silencer plates in the first group of upstream silencer plates are both flush, and the upper end and the lower end of the upstream silencer plates in the second group of upstream silencer plates are both flush, and / or, The upper ends and lower ends of the downstream silencer plates in the first group of downstream silencer plates are flush with each other, and the upper ends and lower ends of the downstream silencer plates in the second group of downstream silencer plates are flush with each other.

14. The heat pump water heater according to claim 13, characterized in that: The height difference between the lower ends of the first group of upstream silencer plates and the upper ends of the second group of upstream silencer plates is greater than or equal to 0.8 of the height of the second group of upstream silencer plates in the vertical direction; and / or, A height difference between lower ends of the first group of downstream silencer panels and upper ends of the second group of downstream silencer panels is greater than or equal to 0.8 of the height of the second group of downstream silencer panels in the vertical direction.

15. The heat pump water heater according to claim 10, characterized in that: The upstream silencer plates in the first group of upstream silencer plates and the upstream silencer plates in the second group of upstream silencer plates are staggered in the transverse direction; and / or, The downstream sound-absorbing panels in the first group of downstream sound-absorbing panels and the downstream sound-absorbing panels in the second group of downstream sound-absorbing panels are staggered in a transverse direction.

16. The heat pump water heater according to claim 15, characterized in that: A lateral projection of at least one upstream silencer plate in the first group of upstream silencer plates can completely cover a lateral projection of a gap between adjacent upstream silencer plates in the corresponding second group of upstream silencer plates; and / or, The lateral projection of the downstream silencer panels in the first group of downstream silencer panels can completely cover the lateral projection of the gaps between adjacent downstream silencer panels in the second group of downstream silencer panels.

17. The heat pump water heater according to claim 10, characterized in that: The longitudinal section of the upstream silencer plate is arc-shaped, and the arc direction of the upstream silencer plates in the first group of upstream silencer plates is opposite to the arc direction of the upstream silencer plates in the second group of upstream silencer plates; and / or, The longitudinal section of the downstream silencer plate is arc-shaped, and the arc direction of the downstream silencer plates in the first group of downstream silencer plates is opposite to the arc direction of the downstream silencer plates in the second group of downstream silencer plates.

18. The heat pump water heater according to claim 10, characterized in that: The first group of upstream silencer plates is closer to the inlet of the fan than the second group of upstream silencer plates, the tangent of the end of the upstream silencer plates in the first group of upstream silencer plates close to the fan faces the inlet of the fan, and the tangent of the end of the upstream silencer plates in the second group of upstream silencer plates away from the fan faces the air inlet; and / or, An air outlet is provided on the shell, and the first group of downstream silencer plates is closer to the outlet of the fan than the second group of downstream silencer plates. The tangent of the end of the downstream silencer plates in the first group of downstream silencer plates close to the fan is toward the outlet of the fan, and the tangent of the end of the downstream silencer plates in the second group of downstream silencer plates away from the fan is toward the air outlet.

19. The heat pump water heater according to claim 1, characterized in that: The upstream sound-absorbing panel comprises a first outer shell having a first cavity and a sound-absorbing material disposed in the first cavity. and / or, The downstream sound-absorbing plate includes a second outer shell having a second cavity and a sound-absorbing material disposed in the second cavity. and / or, The surface of the upstream sound-absorbing plate is provided with a sound-absorbing layer made of sound-absorbing material. and / or, A sound absorbing layer made of sound absorbing material is arranged on the surface of the downstream sound absorbing plate.

20. The heat pump water heater according to claim 1, characterized in that: The shell also includes a compressor and a condensing heat exchanger located below the evaporator in the height direction.

21. The heat pump water heater according to claim 1, characterized in that: The housing has a first side wall and a second side wall which are arranged opposite to each other. Two ends of the upstream muffler plate are respectively connected to the first side wall and the second side wall; Two ends of the downstream silencer plate are respectively connected to the first side wall and the second side wall.

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