Heat pump fan fixing mechanism and heat pump unit

Abstract

The utility model discloses a heat pump fan fixing mechanism and a heat pump unit, and relates to the technical field of air energy heat pump units, the heat pump fan fixing mechanism comprises a fan support, a top connecting structure and a supporting base, the top connecting structure and the supporting base are respectively fixed at the top end and the bottom end of the fan support; the face, connected with the fan support, of the supporting base is provided with at least two boss structures protruding upwards, and mounting holes used for assembling connecting pieces are formed in the central axes of the boss structures. The heat pump fan fixing mechanism is used for supporting a fan to blow air to an evaporator in a heat pump system, and due to the fact that the evaporator can generate condensate water, in order to prevent the condensate water from soaking a metal connecting piece of a supporting base, a protruding boss structure can prevent the condensate water from overflowing a mounting hole to corrode the connecting piece.

Description

Technical Field

[0001] The utility model relates to the technical field of air - source heat pump units, in particular to a fixing mechanism for a heat pump fan and a heat pump unit. Background Art

[0002] During the operation of the heat pump system, the evaporation efficiency of the evaporator directly affects the physical phase - change efficiency of the refrigerant, and thus affects the operating efficiency of the entire heat pump unit. In addition to continuously optimizing the structure design of the evaporator and increasing the heat - transfer area by increasing the number of fins, the fan can assist the evaporation efficiency of the evaporator, reduce the frosting phenomenon of the evaporator, and thus improve the operating efficiency of the entire air - source heat pump unit. Sufficient air volume is also a necessary condition for determining the heat - transfer capacity of the evaporator. Increasing the air volume will greatly increase the heat - transfer coefficient value on the surface of the heat exchanger. When the heat - dissipation area is fixed, the main factor determining the air volume is the wind speed flowing through the surface of the fins. Therefore, the importance of the fan in the heat pump system is self - evident.

[0003] The fixing mechanism for the heat pump fan is used to support the fan to blow air on the evaporator inside the heat pump system. Since the evaporator will generate condensed water, an evaporator bottom tray for holding the condensed water is usually provided at the bottom of the evaporator. The fixing mechanism for the heat pump fan usually uses a metal - made connecting piece to fix the fixing mechanism for the heat pump fan on the evaporator bottom tray. The connecting piece at the bottom of the fixing mechanism for the heat pump fan is easily corroded by the condensed water, thus affecting the stability of the entire fixing mechanism for the heat pump fan. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a fixing mechanism for a heat pump fan and a heat pump unit, which can effectively solve the problem of corrosion of the connecting piece by condensed water.

[0005] On the one hand, the utility model provides a fixing mechanism for a heat pump fan, including: a fan bracket and a top - connecting structure and a supporting base respectively fixed at the top and bottom ends of the fan bracket; at least two upward - protruding boss structures are provided on the surface of the supporting base connected to the fan bracket, and mounting holes for assembling connecting pieces are provided at the central axes of the boss structures.

[0006] The fixing mechanism for the heat pump fan according to the embodiment of the utility model has at least the following beneficial effects:

[0007] After the evaporator frosts, defrosting is required. An evaporator base tray for collecting the condensed water generated during defrosting needs to be provided at the bottom of the evaporator, and the heat pump fan fixing mechanism is fixed on the evaporator base tray through a connecting member. Therefore, the connection between the bottom of the heat pump fan fixing mechanism and the evaporator base tray is easily corroded by the condensed water accumulated in the evaporator base tray, resulting in the failure of the connecting member and affecting the safe operation of the entire heat pump unit. To prevent the condensed water from corroding the connecting member between the support base and the evaporator base tray, a boss structure is specifically provided to raise the mounting hole and prevent the condensed water from flowing into the mounting hole to corrode the connecting member.

[0008] As one of the preferred solutions, the boss structure is frustum-shaped and hollow inside; a baffle is provided around the support base. The hollow boss structure inside is convenient for the stamping of the support base and can reduce the manufacturing cost of the support base. The support base is made of metal material. Compared with the solid structure, the hollow structure inside generates greater deformation when the connecting member is fastened, and a greater pressing force is obtained during fastening. The baffle provided around is used to block the condensed water from entering the support base and further prevent the condensed water from entering the mounting hole.

[0009] As one of the preferred solutions, the fan bracket includes a fan base and several parallel support rods; both ends of the support rod are fixedly connected to the top connection structure and the support base respectively, and the fan base is installed on the side of the support rod. The fan bracket formed by several parallel support rods has high stability. Since most heat pump fans are variable-frequency fans, when switching between different frequency bands, that is, at multiple different wind speeds, the fan base is assembled on the fan bracket. When the fan blade rotates, a force opposite to the wind direction of the fan will be generated on the support rod. The fan bracket needs to bear variable loads, and multiple support rods can improve the strength of the fan bracket and its stability.

[0010] As one of the preferred solutions, the support rod is circular tubular, and a strengthening structure is provided at the connection between the support base and the support rod. Most existing fan brackets are made by pressing or bending plates, and this process has the problem of large material consumption due to large plates. When the fan starts, when the air flows to the fan bracket, due to the use of a circular tube structure, the air can flow out along the rod wall; if a fan bracket made by bending or pressing plates is used, at this time the fan bracket blocks the air flow in a planar manner, and the blocking area becomes larger. By using a circular tube, not only can the air blocking area be reduced, enabling the air to flow along the outer wall of the support rod, but also the problem of fan jitter generated when the fan bracket blocks the air can be effectively solved, reducing the noise.

[0011] Since the fan needs to change multiple frequency bands during operation, and a horizontal component force perpendicular to the central axis of the support rod and in the direction opposite to the wind direction is exerted on the support rod when the fan is operating, the frequency conversion of the fan is equivalent to continuously applying a horizontally variable force to the support rod, which is likely to cause fatigue failure at the connection between the support rod and the support base. Therefore, setting up a strengthening structure can increase the connection strength without changing the original structure and materials, and avoid fracture at the connection.

[0012] As one of the preferred solutions, the strengthening structure includes a first strengthening plate and a second strengthening plate; the first strengthening plate and the second strengthening plate are respectively arranged on both sides of the plane formed by the support rod; the second strengthening plate and the first strengthening plate are distributed along the wind direction of the fan. The first strengthening plate and the second strengthening plate respectively arranged on both sides of the fan support plane can maximize the strengthening of the connection strength between the support rod and the support base.

[0013] As one of the preferred solutions, the height of the second strengthening plate is higher than that of the first strengthening plate. The second strengthening plate is located on the side where the support rod tends after being stressed, and a higher strengthening plate is required on this side to support the rod and reduce deformation; the first strengthening plate on the other side plays a pulling role at the same time, and the first strengthening plate and the second strengthening plate work together to increase the connection strength at the connection between the support rod and the support base.

[0014] As one of the preferred solutions, the top connection structure includes a connected fixing part and a connecting part; the fixing part is connected to the fan support, and the connecting part is used to connect to the evaporator body. The top connection structure connects one end of the fan support to the evaporator body, and the other end is fixed on the evaporator bottom bracket. The two fixing points can stably mount the fan support at a preset position.

[0015] As one of the preferred solutions, the connecting part has a hook structure, and the open end is downwardly clamped on the top of the evaporator body; one side surface of the connecting part is connected to the fixing part, and the other side surface extends inward in a direction perpendicular to the side surface and has a pressing part for clamping the evaporator. The pressing part clamps the evaporator body, so that the evaporator body forms a support for the fan support. Since there are many heat exchange tubes and fins arranged inside the evaporator body, if a connection method such as screw connection that requires opening holes in the evaporator body is used, it is easy to damage the heat exchange tubes and fins, affecting the normal use of the heat exchanger body. Therefore, selecting a clamping method can meet the connection requirements of the fan support, avoid opening holes in the evaporator body, reduce the work difficulty and intensity; and the pressing part has a simple structure and is convenient for manufacturing and maintenance.

[0016] On the other hand, the present invention also provides a heat pump unit, including any one of the heat pump fan fixing mechanisms in the above solutions. The heat pump unit uses all the beneficial effects brought by the above heat pump fan fixing mechanism, which will not be elaborated here.

[0017] As one of the preferred solutions, it further includes an evaporator base; the heat pump fan fixing mechanism is installed on the evaporator base, and the evaporator base is provided with a convex platform mating part that is adapted to the shape of the convex platform structure and protrudes upward; the mounting hole penetrates through the convex platform mating part. The evaporator base is also provided with a convex platform mating part that cooperates with the convex platform structure. The protruding directions of the protruding convex platform mating parts are the same as the protruding direction of the convex platform structure. The hollow convex platform structure and the convex platform mating part can play a positioning and guiding role during installation. The inner surface of the convex platform structure is closely fitted with the outer surface of the convex platform mating part. The mounting hole penetrates through the convex platform structure and the convex platform mating part in the axial direction. The connecting piece is inserted into the mounting hole to form a fixed connection between the support base and the evaporator base. In this way, the connection can be made more stable and firm, and the support base can be locked into the evaporator base more precisely.

[0018] Other features and advantages of the present utility model will be described in the subsequent description, and part of them will become obvious from the description, or be understood by implementing the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the fan fixing mechanism of an embodiment of the present utility model assembled on the evaporator base;

[0020] Figure 2 is a top view of the support base of an embodiment of the present utility model;

[0021] Figure 3 is a schematic cross-sectional view of the support base of the present utility model at A-A of an embodiment;

[0022] Figure 4 is a three-dimensional structure schematic diagram of the fan fixing mechanism of an embodiment of the present utility model;

[0023] Figure 5 is a three-dimensional structure schematic diagram of the top connection structure of an embodiment of the present utility model.

[0024] In the drawings: 1, fan base; 2, support base; 21, convex platform structure; 22, baffle; 3, top connection structure; 31, fixing part; 32, connecting part; 321, pressing part; 4, support rod; 5, evaporator base; 6, strengthening structure; 61, first strengthening plate; 62, second strengthening plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0027] In the description of the present utility model, the meaning of "plurality" is more than two. Understandings such as "greater than", "less than", and "exceeding" do not include the present number, and understandings such as "above", "below", and "within" include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0028] In the description of the present utility model, it should be noted that words such as "set", "installed", and "connected" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0029] Next, the technical solution of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the embodiments described below are some embodiments of the present utility model, not all embodiments.

[0030] Currently, a fan is provided in the heat pump unit, which can boost the evaporation efficiency of the evaporator and reduce the frosting phenomenon of the evaporator, thereby improving the operating efficiency of the entire air source heat pump unit. The heat pump fan fixing mechanism is used to support the fan to blow air on the evaporator inside the heat pump system. Since the evaporator generates condensed water, an evaporator bottom tray for holding the condensed water is usually provided at the bottom of the evaporator. The heat pump fan fixing mechanism usually uses a metal connector to fix the heat pump fan fixing mechanism to the evaporator bottom tray, and the connector at the bottom of the heat pump fan fixing mechanism is easily corroded by the condensed water. To solve the corrosion problem of the connector at the connection between the heat pump fan fixing mechanism and the evaporator bottom tray, a boss structure 21 is provided to increase the height of the mounting hole to avoid the condensed water contacting the connector.

[0031] Such as Figure 1 and Figure 4As shown in the figure, this embodiment provides a fixing mechanism for a heat pump fan. In this embodiment, two support rods 4 are taken as examples for illustration. The two support rods 4 are arranged in parallel, the central axis of the support rod 4 is perpendicular to the horizontal plane, the top end of the support rod 4 is connected to the top connection structure 3, and the bottom end of the support rod 4 is connected to the support base 2. Among them, both ends of the support rod 4 are connected by welding to jointly form a fixing mechanism for the heat pump fan in a rectangular structure. The fan base 1 is used to assemble the fan and fix the fan on the side of the support rod 4. After the fan is started, it blows air on the evaporator, helping the evaporator improve the evaporation efficiency and reducing the frosting phenomenon of the evaporator, thereby improving the operating efficiency of the entire heat pump unit. It should be noted that the two support rods 4 are arranged in parallel, and the formed plane is parallel to one side of the evaporator to maximize the heat dissipation area. Further, the fan base 1 is detachably connected to the support rod 4. When the position of the fan needs to be adjusted, the fan can be moved up and down by adjusting the position of the fan base 1 on the support rod 4.

[0032] On the top surface of the support base 2, there are two boss structures 21. The protruding direction of the boss structure 21 is perpendicular to the top surface of the support base 2 and upward. The boss structure 21 is provided with mounting holes for assembling the connecting parts, and the axis of the mounting hole is coaxial with the axis of the boss structure 21. It can be understood that the connecting parts are made of metal, and other components of the fixing mechanism for the heat pump fan, such as the support base 2, are also made of metal. The connection part between the bottom of the fixing mechanism for the heat pump fan and the evaporator base 5 is easily corroded by condensed water, resulting in the failure of the connecting parts and affecting the safe operation of the entire heat pump unit. In order to prevent the connecting parts between the support base 2 and the evaporator base 5 from being corroded by condensed water, the boss structure 21 for installing the connecting parts is provided. Since the protruding boss structure 21 is higher than the bottom surface of the support base 2, the condensed water cannot overflow the mounting holes on the boss structure 21 to soak the connecting parts, effectively avoiding the corrosion problem of the connecting parts. In order to further avoid the connecting parts from being corroded by condensed water, a baffle 22 is provided around the support base 2 to block the condensed water from entering the support base 2.

[0033] Specifically, the fan is installed on the fan bracket. On the top surface of the support base 2, there are at least two upward protruding boss structures 21. In this embodiment, two boss structures 21 are taken as examples for illustration. The boss structure 21 is in the shape of a frustum of a cone, and the inside of the boss structure 21 is hollow. The support base 2 is generally made of metal material, and when manufacturing the support base 2, it can be directly stamped into shape to reduce the manufacturing cost. It can be understood that the shape of the boss structure 21 can also be a cylindrical shape, a rectangular frustum shape or other columnar boss structures 21, which can raise the mounting holes to a certain height to avoid the connecting parts in the mounting holes from being corroded by condensed water.

[0034] In practical applications, in order to increase the connection strength at the joint between the support rod 4 and the support base 2, a strengthening structure 6 is added at the joint. The strengthening structure 6 includes a first strengthening plate 61 and a second strengthening plate 62. Among them, the second strengthening plate 62 and the first strengthening plate 61 are distributed on both sides of the plane formed by the two support rods 4 along the direction of the reaction force exerted by the fan on the support rod 4. Further, the height of the second strengthening plate 62 is higher than that of the first strengthening plate 61. It should be noted that the second strengthening plate 62 and the first strengthening plate 61 are only used to distinguish the strengthening plates at different positions, and the positions of the strengthening plates can be adjusted accordingly according to the installation direction of the fan, that is, adjusted according to the direction of the horizontal component force of the fan acting on the support rod 4.

[0035] Furthermore, most of the fans in the heat pump unit system are variable-frequency fans. Therefore, the magnitude of the horizontal component force exerted by the fan on the support rod 4 is also different, that is, the fan sways the support rod 4 back and forth; the long-term swaying will cause the weld at the joint between the support rod 4 and the support base 2 to fail. For this reason, strengthening plates are provided on both sides of the plane formed by the support rod 4 to improve the connection strength and avoid fatigue failure. In addition, in addition to being provided at the joint in the form of a plate, the strengthening structure 6 can also act on the joint in other forms such as reinforcing ribs.

[0036] Most of the existing fan brackets are made by pressing or bending plates. This process has the problem of large material consumption due to large plates. When the fan starts, when the air flows to the fan bracket, if the fan bracket is made by the process of bending or pressing plates, at this time the fan bracket blocks the air flow in a planar manner, and the blocked area becomes larger. Therefore, the fan bracket will vibrate, affecting the safety of the equipment and generating noise during operation. To solve the above problems, the support rod 4 in this embodiment is a circular tube structure, and the air can be discharged along the rod wall; using a circular tube can reduce the air-blocking area, enable the air to flow along the outer wall of the support rod 4, effectively solve the problem of fan vibration caused by air blocking of the fan bracket, and reduce noise.

[0037] The top connection structure 3 includes a fixing part 31 for connecting with the support rod 4 and a connecting part 32 for clamping with the evaporator. Specifically, as Figure 5 shown, the connecting part 32 is in the shape of a hook; when in use, as Figure 1 shown, the open end of the connecting part 32 faces downward and is clamped on the top of the evaporator, and is hooked on the top surface of the evaporator to provide positioning when the support bottom is not yet fixed, facilitating the installation of the support bottom.

[0038] Further, one side of the opening of the connecting portion 32 is connected to the fixing portion 31, and the other side extends in a direction perpendicular to this side and pointing to the fixing portion 31 to form a pressing portion 321. It should be noted that the top connection structure 3 is made of elastic metal. The pressing portion 321 makes the opening width of the connecting portion 32 smaller, and the opening width is slightly smaller than the width of the top surface of the evaporator. The connecting portion 32 is clamped on the top surface of the evaporator, and the elastic force generated by the deformation of the connecting portion 32 causes the pressing portion 321 to clamp the evaporator, thereby realizing the clamping connection. The magnitude of the clamping force can be changed by controlling the extending length of the pressing portion 321; the longer the extending length of the pressing portion 321, the smaller the opening width, and the greater the deformation generated when clamping the evaporator, so the clamping force is greater.

[0039] This embodiment provides a heat pump unit. The internal fan of this heat pump unit uses the heat pump heat exchange fan fixing mechanism in any of the above embodiments. The heat pump unit in this embodiment further includes an evaporator bottom bracket 5. Specifically, during the use of the evaporator, condensate will be generated. The evaporator bottom bracket 5 is located at the bottom of the evaporator and is used to collect the condensate generated by the evaporator and discharge it outside the heat pump unit. The support base 2 in the heat pump fan fixing structure needs to be fixed on the bottom bracket through a connecting member. Specifically, the upper surface of the evaporator bottom bracket 5 is provided with the same number of boss mating portions as the boss structures 21 of the support base 2.

[0040] Further, the top and bottom ends of the fan bracket of the heat pump fan fixing mechanism are respectively fixedly connected to the top connection structure 3 and the support base 2 by welding; the top surface of the support base 2 is provided with two upwardly protruding boss structures 21. The boss structures 21 are provided with mounting holes for assembling connecting members, and the central axis of the mounting hole is coaxial with the central axis of the boss structure 21. The boss structure 21 is in the shape of a frustum of a cone, and the inside of the boss structure 21 is hollow. The boss mating portion protrudes in the top direction. In the specific implementation process, the boss mating portion is coaxially assembled with the boss structure 21, and the boss mating portion is inserted into the hollow inner cavity of the boss structure 21. Then, connecting members such as bolts and nuts are used to pass through the mounting holes penetrating the boss structure 21 and the boss mating portion for fastening.

[0041] The evaporator bottom bracket 5 is also provided with a boss mating portion that cooperates with the boss structure 21. The protruding directions of the same protruding boss mating portions are the same as the protruding direction of the boss structure 21. The hollow boss structure 21 and the boss mating portion can play a positioning and guiding role during installation. The inner surface of the boss structure 21 is in close contact with the outer surface of the boss mating portion. The mounting hole penetrates the boss structure 21 and the boss mating portion in the axial direction. The connecting member is installed in the mounting hole to form a fixed connection between the support base 2 and the evaporator bottom bracket 5. In this way, the connection can be made more stable and firm, and the support base 2 can be more precisely locked into the evaporator bottom bracket 5.

[0042] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present utility model within the knowledge of those of ordinary skill in the art to which it pertains.

Claims

1. A heat pump fan fixing mechanism, characterized in that: include: A fan support and a top connection structure (3) and a support base (2) respectively fixed to the top and bottom ends of the fan support; At least two boss structures (21) protruding upward are provided on one side of the support base (2) connected to the fan bracket, and a mounting hole for assembling a connecting piece is provided at the central axis of the boss structure (21).

2. The heat pump fan fixing mechanism according to claim 1, characterized in that: The boss structure (21) is in the shape of a truncated cone and is hollow inside; a baffle (22) is provided on the periphery of the support base (2).

3. The heat pump fan fixing mechanism according to claim 1, characterized in that: The fan support comprises a fan base (1) and a plurality of parallel support rods (4); The two ends of the support rod (4) are respectively fixedly connected to the top connection structure (3) and the supported base (2), and the fan base (1) is installed on the side of the support rod (4).

4. The heat pump fan fixing mechanism according to claim 3, characterized in that: The support rod (4) is in the shape of a circular tube, and a reinforcement structure (6) is provided at the connection between the support base (2) and the support rod (4).

5. The heat pump fan fixing mechanism according to claim 4, characterized in that: The reinforcement structure (6) comprises a first reinforcement plate (61) and a second reinforcement plate (62); The first reinforcing plate (61) and the second reinforcing plate (62) are respectively arranged on both sides of the plane formed by the support rod (4); the second reinforcing plate (62) and the first reinforcing plate (61) are distributed along the wind direction of the fan.

6. The heat pump fan fixing mechanism according to claim 5, characterized in that: The second reinforcing plate (62) is higher than the first reinforcing plate (61).

7. The heat pump fan fixing mechanism according to claim 1, characterized in that: The top connection structure (3) comprises a connected fixing portion (31) and a connecting portion (32); the fixing portion (31) is connected to the fan bracket, and the connecting portion (32) is used to be connected to the evaporator body.

8. The heat pump fan fixing mechanism according to claim 7, characterized in that: The connecting portion (32) is in the form of a hook structure, with an open end facing downward and clamped on the top of the evaporator body; one side of the connecting portion (32) is connected to the fixing portion (31), and the other side extends inwardly in a direction perpendicular to the side to form a pressing portion (321) for clamping the evaporator.

9. A heat pump unit, characterized in that: It comprises the heat pump fan fixing mechanism as described in any one of claims 1-8.

10. The heat pump unit according to claim 9, characterized in that: It also includes an evaporator base (5); the heat pump fan fixing mechanism is installed on the evaporator base (5); the evaporator base (5) is provided with a boss matching portion that is adapted to the shape of the boss structure (21) and protrudes upward; the mounting hole passes through the boss matching portion.

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