Solar air collector and defrosting heat pump system

Abstract

The utility model belongs to the technical field of heat pump devices, and discloses a solar air heat collector and a defrosting heat pump system. The solar air heat collector comprises a plate body, a transparent cover plate and a draught fan, an air groove is formed in the plate body, the groove bottom face of the air groove is arranged in a fluctuating mode, and a protruding block is arranged on the groove bottom face; the transparent cover plate covers the plate body, an air channel is formed between the air groove and the transparent cover plate, and the air channel is used for airflow to pass through; an air inlet and an air outlet are formed in the plate body, the two ends of the air channel communicate with the outside through the air inlet and the air outlet correspondingly, and the fan is used for sucking air in the air channel through the air outlet. According to the solar air heat collector, the illumination area of the plate body is increased, air entering the air channel can make contact with the bottom face of the groove for multiple times in the flowing process, and therefore rolling and circuitous forward air flow is formed, and the heat collecting efficiency of the solar air heat collector is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of heat pump device technology, and in particular to a solar air collector and a defrosting heat pump system. Background Technology

[0002] The outdoor units of existing air conditioners or heat pumps are typically placed outdoors, exchanging heat with the external environment through the evaporator fins within the outdoor unit, releasing or absorbing heat energy into the air. Therefore, the heat exchange efficiency of air conditioners or heat pumps is significantly affected by the ambient temperature. When the weather is cold, frost easily forms on the evaporator fins of the outdoor unit, and in severe cases, even an ice shell can form, greatly reducing its heat exchange performance. To eliminate this situation, the unit needs to consume additional heat for defrosting, thus significantly increasing the power consumption of the air conditioner or heat pump.

[0003] With the continuous development of science and technology, solar energy, as a clean, economical, and stable energy source, is currently widely used in the fields of solar thermal and photovoltaic power generation. However, the commonly used solar collectors at present have complex structures and low heat collection efficiency, which cannot well meet people's daily energy needs.

[0004] Therefore, how to improve the heat collection efficiency of solar collectors and combine solar collectors with outdoor units of air conditioners to utilize solar energy for efficient defrosting are technical problems that urgently need to be solved. Utility Model Content

[0005] The purpose of this utility model is to provide a solar air collector and a defrosting heat pump system that can make full use of solar energy to defrost the outdoor unit of the heat pump unit.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Solar air collectors include:

[0008] The plate body has air grooves, the bottom surface of the air grooves is undulating, and the bottom surface of the air grooves is provided with protrusions.

[0009] A transparent cover plate is provided over the plate body, and an air channel is formed between the air duct and the transparent cover plate, the air channel being used for airflow;

[0010] The plate has an air inlet and an air outlet, and the two ends of the air channel are connected to the outside through the air inlet and the air outlet, respectively.

[0011] A fan, the fan being used to draw air from the air passage through the air outlet.

[0012] Preferably, the air passage is S-shaped.

[0013] Preferably, the air channel is provided with a partition, which divides the air channel into a first flow channel and a second flow channel.

[0014] Preferably, the protrusions are evenly distributed on the bottom surface of the groove.

[0015] Preferably, the end of the protrusion is hemispherical.

[0016] Preferably, a filter screen is provided at the air inlet.

[0017] Preferably, the bottom plate of the air duct has a wavy cross-section.

[0018] Preferably, the plate body is provided with a reinforcing rib on the side away from the air duct, and the reinforcing rib is provided in the direction of extending along the undulation of the bottom of the air duct.

[0019] The defrosting heat pump system, including the aforementioned solar air collector, also includes:

[0020] Heat pump units;

[0021] A mounting bracket is detachably connected to the outdoor unit of the heat pump unit, and a plate is detachably connected to the mounting bracket. The air outlet of the plate can blow air to the evaporator in the outdoor unit.

[0022] Preferably, the defrosting heat pump system further includes a guide duct, which is detachably connected to the mounting frame. The fan is disposed inside the guide duct, which has an inlet and an outlet. The inlet is positioned opposite the outlet, and the outlet is positioned opposite the evaporator of the outdoor unit.

[0023] The beneficial effects of this utility model are as follows:

[0024] This utility model provides a solar air collector, including a plate, a transparent cover, and a fan. Since the transparent cover is mounted on the plate and forms an air channel for air circulation with the air duct, and both ends of the air channel are connected to the outside through an air inlet and an air outlet, when sunlight shines on the transparent cover, the light can pass through the transparent cover and heat the air entering the air channel. Because a fan is installed at the air outlet, it draws air from the air channel, thereby continuously causing air to enter from the air inlet, be heated, and flow out from the air outlet, accelerating the airflow speed in the air channel and ensuring the stable operation of the solar air collector. It continuously outputs hot air to the outside. Because the bottom surface of the air trough has protrusions, the area exposed to sunlight on the plate is greatly increased, ensuring the absorption of more heat and thus improving the temperature rise of the air in the air channel. The undulating bottom surface of the trough, combined with the protrusions, further increases the area exposed to sunlight on the plate. Furthermore, the air entering the air channel can repeatedly contact the bottom surface of the trough during its flow, forming a swirling and meandering airflow, greatly improving the heat collection efficiency of the solar air collector. In addition, the undulating bottom surface of the trough effectively enhances the structural strength of the plate, making the solar air collector more robust and durable.

[0025] The defrosting heat pump system provided by this utility model includes the aforementioned solar air collector, as well as a heat pump unit and a mounting frame. The plate is fixedly mounted on the outdoor unit of the heat pump unit via the mounting frame. Since the air outlet of the plate can blow air to the evaporator in the outdoor unit, the solar air collector can deliver heated air to the frosted evaporator to utilize solar energy for defrosting the heat pump unit. The heat pump unit does not need to be equipped with a separate defrosting mechanism, thereby reducing the energy consumption of the heat pump unit. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the plate structure provided in a specific embodiment of the present utility model;

[0027] Figure 2 This is a cross-sectional view of the plate body provided in a specific embodiment of this utility model;

[0028] Figure 3 This is a first-view structural schematic diagram of the defrosting heat pump system provided in a specific embodiment of this utility model;

[0029] Figure 4 This is a second-view structural schematic diagram of the defrosting heat pump system provided in a specific embodiment of this utility model;

[0030] Figure 5 This is a third-view structural diagram of the defrosting heat pump system provided in a specific embodiment of this utility model.

[0031] In the picture:

[0032] 100 - Outdoor unit;

[0033] 200-Fixed bracket;

[0034] 300 - Airflow guide duct; 310 - Airflow outlet;

[0035] 400 - Temperature sensor;

[0036] 500-Connector;

[0037] 1-Panel; 12-Protrusion; 13-Air outlet; 14-Baffle;

[0038] 2-Transparent cover;

[0039] 3-Air passage; 31-First flow passage; 32-Second flow passage;

[0040] 4-Filter screen;

[0041] 5-Reinforcing ribs. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] like Figures 1 to 3 As shown, this utility model provides a solar air collector, which includes a plate 1, a transparent cover 2, and a fan. The plate 1 has a trough with an undulating bottom surface and a protrusion 12. The transparent cover 2 covers the plate 1, and an air channel 3 is formed between the trough and the transparent cover 2 for airflow. The plate 1 has an air inlet and an air outlet 13. The two ends of the air channel 3 are connected to the outside through the air inlet and the air outlet 13, respectively. The fan is used to draw air from the air channel 3 through the air outlet 13. In this embodiment, since the transparent cover 2 covers the plate 1 and forms an air channel 3 for air circulation between it and the air duct, and the two ends of the air channel 3 are connected to the outside through the air inlet and the air outlet 13, when sunlight shines on the transparent cover 6, the light can pass through the transparent cover 6 to heat the air entering the air channel 3; since a fan is provided at the air outlet 13, the fan is used to draw air from the air channel 3, thereby enabling air to continuously enter from the air inlet and flow out from the air outlet 13 after being heated, which accelerates the airflow speed in the air channel 3 and ensures that the solar air collector can stably and continuously output hot air to the outside. Because the bottom surface of the air trough is provided with protrusions 12, the protrusions 12 can greatly increase the light-receiving area of ​​the plate 1, so as to ensure the absorption of more heat, thereby improving the temperature rise effect of the air in the air channel 3. Because the bottom surface of the trough is undulating, combined with the protrusions 12 on the bottom surface of the trough, the light-receiving area of ​​the plate 1 is further increased. Moreover, the air entering the air channel 3 can come into contact with the bottom surface of the trough multiple times during the flow process, thereby forming a turbulent and meandering airflow, which greatly improves the heat collection efficiency of the solar air collector. In addition, the undulating bottom surface of the trough can effectively enhance the structural strength of the plate 1, making the solar air collector more robust and durable.

[0047] In this embodiment, the plate 1 is made of high-density black foamed polypropylene, which has the advantages of being lightweight and corrosion-resistant. When the transparent cover 2 is placed on the plate 1, an air channel 3 for air circulation is formed between the transparent cover 2 and the plate 1. The transparent cover 2 is made of tempered glass, and the joint between the transparent cover 2 and the plate 1 is provided with sealing rubber to prevent heat loss. In order to further improve the durability of the plate 1, the four sides of the plate 1 are wrapped with sprayed sheet metal, and corner protectors are added at the four corners of the plate 1. Specifically, the plate 1 can also be made of other lightweight and durable black materials, which are not limited here.

[0048] Furthermore, such as Figure 1 and Figure 2 As shown, the air channel 3 is S-shaped, which allows the incoming air to undergo sufficient heat exchange in the air channel 3, thereby improving the heating effect of the solar air collector on the air.

[0049] To ensure stable and uniform heating of the airflow in air channel 3, such as Figure 1 and Figure 2 As shown, a partition 14 is provided in the air channel 3, which divides the air channel 3 into a first flow channel 31 and a second flow channel 32. Specifically, the partition 14 divides the air channel 3 into a first flow channel 31 and a second flow channel 32 with the same flow area, so that the air entering the air channel 3 is divided into two parts for flow, wherein the first flow channel 31 and the second flow channel 32 are both S-shaped extensions.

[0050] Furthermore, such as Figure 1 As shown, the protrusions 12 are evenly arranged on the bottom surface of the groove, so that the light area in the air channel 3 is the same, thereby ensuring the uniformity of air heating.

[0051] The specific structure and shape of the protrusion 12 can be set according to actual needs, as long as it can increase the light-receiving area of ​​the plate 1; for example, such as Figure 2 As shown, the end of the protrusion 12 is hemispherical, which increases the illumination area and allows air to flow smoothly over the surface of the protrusion 12, reducing the friction between the airflow and the protrusion 12, thereby further ensuring the uniformity of air heating; in addition, the hemispherical surface reduces the difficulty of later cleaning and maintenance.

[0052] like Figure 1 As shown, a filter 4 is installed at the air inlet. The filter 4 is a sheet metal part that is bolted to the plate 1. The filter 4 can prevent external debris from being sucked into the air channel 3, thereby effectively avoiding the situation where the heating effect is affected by the blockage of the channel.

[0053] Specifically, such as Figure 2 and Figure 4As shown, the bottom plate of the air trough has a wavy cross-section and a uniform wall thickness throughout. Compared to a bottom structure with a flat side, this reduces the overall weight of the solar air collector and lowers manufacturing costs. Specifically, when air flows in the air channel 3, it has two perpendicular directions, a first direction and a second direction, forming an S-shaped tortuous flow direction. The first direction is the longer direction in the air channel 3, and the second direction is the shorter direction. The wavy undulation of the bottom plate extends along the second direction, thereby avoiding wind resistance to the air flowing in the first direction, thus accelerating the air velocity in the air channel 3 and reducing the power consumption of the fan.

[0054] To improve the structural strength of plate 1, such as Figure 4 and Figure 5 As shown, a reinforcing rib 5 is provided on the side of the plate 1 away from the air duct, and the reinforcing rib 5 is provided along the undulating direction of the bottom plate of the air duct; specifically, the reinforcing rib 5 is integrally formed with the plate 1.

[0055] This embodiment also provides a defrosting heat pump system, which includes the aforementioned solar air collector, a heat pump unit, and a mounting bracket 200. The mounting bracket 200 is detachably connected to the outdoor unit 100 of the heat pump unit, and the plate 1 is detachably connected to the mounting bracket 200. The air outlet 13 of the plate 1 can blow air to the evaporator in the outdoor unit 100. In this embodiment, since the air outlet 13 of the plate 1 can blow air to the evaporator in the outdoor unit 100, the solar air collector can deliver heated air to the frosted evaporator to utilize solar energy for defrosting the heat pump unit. The heat pump unit does not need to be equipped with a separate defrosting mechanism, thereby reducing the energy consumption of the heat pump unit.

[0056] Furthermore, such as Figures 3 to 5 As shown, the defrosting heat pump system also includes a duct 300, which is detachably connected to the mounting bracket 200. A fan is installed inside the duct 300. The duct 300 has an intake port and an exhaust port 310. The intake port is positioned opposite the exhaust port 13, and the exhaust port 310 is positioned opposite the evaporator of the external unit 100.

[0057] The specific structure of the mounting bracket 200 can be configured according to actual needs, as long as a reliable connection between the panel 1 and the outdoor unit 100 can be ensured; for example, such as Figure 4As shown, the mounting bracket 200 includes a base, a horizontal connecting rod, diagonal braces, and connecting sheet metal parts. The base is fixedly connected to the casing of the outdoor unit 100 by bolts. The connecting sheet metal parts are connected to the base by the diagonal braces. The plate 1 is detachably connected to the connecting sheet metal parts by bolts. The horizontal connecting rod is connected to the diagonal braces on both sides to improve the overall stability of the mounting bracket 200. It should be noted that when assembling this solar air collector, the tilt angle of the diagonal braces needs to be adjusted according to the local sunlight angle to obtain the best sunlight perpendicular to the plate 1. Then, the plate 1 is bolted to the connecting sheet metal parts to complete the assembly.

[0058] The specific structure of the air guide duct 300 can be set according to actual needs, as long as it can ensure that the air blown out of the air outlet 13 of the plate 1 can pass through the air guide duct 300 and be blown to the evaporator of the outdoor unit 100. For example, the plane where the air guide duct 300 inlet is located is inclined, and the inclination angle is the same as the inclination angle of the plate 1, so as to ensure that the air guide duct 300 inlet can be closely attached to the air outlet 13 of the plate 1. The two can also be connected by adding a short pipe. The air outlet 310 of the air guide duct 300 is opened downward so as to blow hot air to the evaporator located below.

[0059] Furthermore, such as Figure 4 and Figure 5 As shown, a connector 500 is provided at the end of the plate 1 away from the outdoor unit 100. The connector 500 has a mounting through hole for screws to pass through and connect and fix with other attachments such as walls, thereby further improving the installation stability of the plate 1.

[0060] The defrosting heat pump system also includes a temperature sensor 400, which is located at the air outlet 310 of the air duct 300 to monitor the temperature of the air blown out of the air outlet 310. The temperature sensor 400 can send signals to the control board of the defrosting heat pump system. The power cord of the fan of the solar air collector is connected to the power supply of the outdoor unit 100 of the heat pump unit, and the two can achieve linkage control. The fan of the solar air collector can be automatically shut down based on temperature difference, as specifically implemented as follows:

[0061] When the user turns on the defrosting heat pump system for heating, since the power cord of the fan is connected to the power supply of the outdoor unit 100 of the heat pump unit, the fan of the solar air collector starts simultaneously with the heat pump unit. Air then begins to blow from the outlet 310 of the air duct 300. The temperature sensor 400 detects the temperature of the air blown from the outlet 310 and transmits this data in real time to the control board. The control board compares the temperature of the air blown from the outlet 310 with the preset temperature. If the temperature detected by the temperature sensor 400 is higher than the preset temperature and exceeds the difference temperature ΔT, the fan continues to run to ensure a continuous supply of hot air to the evaporator of the outdoor unit 100 for defrosting. If the temperature detected by the temperature sensor 400 is lower than the preset temperature, or if the difference between the temperature detected by the temperature sensor 400 and the preset temperature does not exceed the difference temperature ΔT, it indicates that the air temperature heated by the solar air collector is too low to perform defrosting. In this case, the control board sends a shutdown command to the fan in the air duct 300, and the fan stops.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A solar air collector, characterized in that, include: The plate (1) has a wind groove, the bottom surface of the wind groove is undulating, and a protrusion (12) is provided on the bottom surface of the wind groove; A transparent cover plate (2) is provided on the plate body (1), and an air channel (3) is formed between the air duct and the transparent cover plate (2), and the air channel (3) is used for airflow. The plate (1) is provided with an air inlet and an air outlet (13), and the two ends of the air channel (3) are connected to the outside through the air inlet and the air outlet (13) respectively. A fan is used to draw air from the air passage (3) through the air outlet (13).

2. The solar air collector according to claim 1, characterized in that, The air passage (3) is S-shaped.

3. The solar air collector according to claim 2, characterized in that, The air passage (3) is provided with a partition (14), which divides the air passage (3) into a first flow passage (31) and a second flow passage (32).

4. The solar air collector according to claim 1, characterized in that, The protrusions (12) are evenly distributed on the bottom surface of the groove.

5. The solar air collector according to claim 4, characterized in that, The end of the protrusion (12) is hemispherical.

6. The solar air collector according to claim 1, characterized in that, A filter screen (4) is installed at the air inlet.

7. The solar air collector according to claim 1, characterized in that, The bottom plate of the air duct has a wavy cross-section.

8. The solar air collector according to claim 7, characterized in that, The plate (1) is provided with a reinforcing rib (5) on the side away from the air trough, and the reinforcing rib (5) is provided along the direction of the undulation of the bottom of the air trough.

9. A defrosting heat pump system, characterized in that, The solar air collector according to any one of claims 1-8 further includes: Heat pump units; A mounting bracket (200) is detachably connected to the outdoor unit (100) of the heat pump unit, and a plate (1) is detachably connected to the mounting bracket (200). The air outlet (13) of the plate (1) can blow air to the evaporator in the outdoor unit (100).

10. The defrosting heat pump system according to claim 9, characterized in that, The defrosting heat pump system also includes a duct (300) which is detachably connected to the mounting bracket (200). The fan is located inside the duct (300). The duct (300) has an intake port and an exhaust port (310). The intake port is positioned opposite the exhaust port (13), and the exhaust port (310) is positioned opposite the evaporator of the outdoor unit (100).

Images