Heat pump outdoor unit, heat pump system and control methods of heat pump outdoor unit

Abstract

This invention discloses a heat pump outdoor unit, a heat pump system, and a control method for the heat pump outdoor unit, relating to the field of HVAC equipment technology. The heat pump outdoor unit includes: an outdoor unit casing, a heating component, and a heat exchange and exhaust component. The outdoor unit casing has an air inlet and an air outlet. The air outlet includes a first air outlet with a first air outlet grille. The outdoor unit casing includes an air outlet frame, and the first air outlet is formed on the top of the air outlet frame. The heating component includes a heating element disposed on the first air outlet grille. The heat exchange and exhaust component is disposed inside the outdoor unit casing. According to the embodiment of the heat pump outdoor unit of this invention, by providing a first air outlet grille at the first air outlet located at the top, the first air outlet grille can reduce the entry of external foreign objects into the outdoor unit casing through the first air outlet; and by providing a heating component on the first air outlet grille, ice and snow on the first air outlet grille can be melted, preventing ice and snow from clogging the first air outlet.

Description

Technical Field

[0001] This invention relates to the field of HVAC equipment technology, and in particular to a heat pump outdoor unit, a heat pump system, and a control method for the heat pump outdoor unit. Background Technology

[0002] In related technologies, the outdoor unit of a heat pump is located in the outdoor environment. When the temperature is relatively cold (e.g., below 0°C) or during snowy weather, the air outlet of the outdoor unit may be blocked by ice and snow, especially the air outlet located at the top of the casing, where ice and snow are more likely to accumulate and cause blockage. This results in a reduction in the actual air outlet area of ​​the heat pump outdoor unit or prevents it from airing properly. Therefore, improvements are needed. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a heat pump outdoor unit that, by providing a first air outlet grille at the top, reduces the entry of external foreign objects into the outdoor unit casing through the first air outlet; and by providing a heating component to the first air outlet grille, the heating component can heat the first air outlet grille, melting the ice and snow on the first air outlet grille, thus preventing ice and snow from clogging the first air outlet and causing a reduction in the actual air outlet area of ​​the heat pump outdoor unit or preventing normal air outlet operation.

[0004] The present invention also proposes a heat pump system including the above-mentioned heat pump outdoor unit.

[0005] The present invention also proposes a control method for the above-mentioned outdoor unit of the heat pump.

[0006] According to a first aspect of the present invention, a heat pump outdoor unit includes: an outdoor unit housing, the outdoor unit housing including a housing body, a front partition, and an air outlet frame, the air outlet frame being disposed on the front side of the housing body, the front partition being disposed between the housing body and the air outlet frame, the housing body and the front partition jointly defining an installation cavity, the air outlet frame and the front partition jointly defining an air outlet cavity, the front partition having an air outlet communicating with the air outlet cavity and the installation cavity, the housing body having an air inlet communicating with the installation cavity, the air outlet frame having an air outlet communicating with the air outlet cavity, the air outlet frame including a frame top located at the top, the air outlet including a first air outlet located at the frame top, and a first air outlet grille being provided at the first air outlet; a heating assembly including a heating element disposed at the first air outlet grille; and a heat exchange exhaust assembly disposed within the installation cavity.

[0007] According to an embodiment of the present invention, the outdoor unit of the heat pump has an air outlet frame provided on the front side of the main body of the casing. The main body of the casing and the front partition together define the mounting cavity, and the air outlet frame and the front partition together define the air outlet cavity. When the outdoor unit of the heat pump is working, the airflow discharged from the heat exchange exhaust assembly in the mounting cavity is not directly discharged to the outside, but is discharged into the air outlet cavity through the air outlet. Through the buffering effect of the air outlet cavity, the flow velocity and impact force of the airflow can be reduced. The airflow after being buffered by the air outlet cavity is discharged to the outside through the air outlet. This can reduce the discomfort caused by the impact of the airflow on the human body. Furthermore, by being located in A first air outlet grille is installed at the top first air outlet. The first air outlet grille can block and prevent debris in the outdoor environment, reducing the number of foreign objects entering the outdoor unit casing through the first air outlet and reducing the problem of debris entering the outdoor unit casing through the first air outlet and affecting the internal components of the outdoor unit casing. By installing a heating element in the first air outlet grille, the heating element can heat the first air outlet grille, increase the temperature of the first air outlet grille, melt the ice and snow on the first air outlet grille, and prevent ice and snow from blocking the first air outlet, which would reduce the actual air outlet area of ​​the heat pump outdoor unit or prevent it from airing normally.

[0008] According to some embodiments of the present invention, the first air outlet grille is detachably connected to the outdoor unit housing.

[0009] According to some embodiments of the present invention, the heating element is disposed on the inner side of the first air outlet grille.

[0010] According to some embodiments of the present invention, the heating element is embedded within the first air outlet grille.

[0011] According to some embodiments of the present invention, the first air outlet grille is integrally injection molded onto the heating element.

[0012] According to some embodiments of the present invention, the heating element is detachably mounted on the first air outlet grille.

[0013] According to some embodiments of the present invention, the heating element is snap-fitted to the first air outlet grille.

[0014] According to some embodiments of the present invention, the first air outlet grille includes a grille body and a limiting structure. The limiting structure is disposed on the inner side of the first air outlet grille and has a limiting hole. The heating element passes through the limiting hole.

[0015] According to some embodiments of the present invention, the heating element is an electric heating element.

[0016] According to some embodiments of the present invention, the outdoor unit of the heat pump includes a temperature detection component for detecting the ambient temperature or the temperature of the outdoor heat exchanger, and both the temperature detection component and the heating component are electrically connected to the controller of the outdoor unit of the heat pump.

[0017] According to some embodiments of the present invention, at least a portion of the upper surface of the first air outlet grille constitutes a guide surface, the guide surface extending downwardly at an angle.

[0018] According to some embodiments of the present invention, the angle between the guide surface and the horizontal plane is α, where 0° < α ≤ 15°.

[0019] According to some embodiments of the present invention, the guide surface extends downward at an angle in the front-to-back direction.

[0020] According to some embodiments of the present invention, the guide surface extends downward in a direction from back to front.

[0021] According to some embodiments of the present invention, the outdoor unit housing includes a partition plate disposed within the main body of the housing to divide the mounting cavity into a first mounting cavity and a second mounting cavity arranged in a left-right direction. The heat exchange and ventilation assembly includes an outdoor heat exchanger, an outdoor fan, and a compressor. The outdoor heat exchanger and the outdoor fan are disposed in the first mounting cavity, and the compressor is disposed in the second mounting cavity. The air inlet and the air outlet are both connected to the first mounting cavity.

[0022] According to some embodiments of the present invention, the air outlet frame is detachably connected to the main body of the housing.

[0023] According to some embodiments of the present invention, the air outlet frame includes a frame portion and a front panel, the frame portion includes a frame top located at the top, the frame portion is annular, the front panel covers the front side of the frame portion, the frame portion is connected between the front panel and the housing body, and the air outlet is formed in the frame portion.

[0024] According to some embodiments of the present invention, the frame includes a frame bottom located at the bottom, the air outlet includes a second air outlet disposed at the frame bottom, and at least a portion of the second air outlet constitutes a drain outlet.

[0025] According to some embodiments of the present invention, the frame portion includes a frame bottom and a frame side portion, the frame top is located at the top of the frame portion, the frame bottom is located at the bottom of the frame portion, the frame side portion is connected to the left and right sides of the frame top and the frame bottom, and the air outlet includes a third air outlet, which is disposed on the frame side portion.

[0026] A heat pump system according to a second aspect of the present invention includes: an indoor air conditioning unit; and an outdoor heat pump unit according to a first aspect of the present invention.

[0027] According to the embodiments of the present invention, the heat pump system includes a heat pump outdoor unit according to the first aspect of the present invention, which reduces the problem of debris entering the outdoor unit casing through the first air outlet located at the top and affecting the components inside the outdoor unit casing; and avoids ice and snow blocking the first air outlet, which would reduce the actual air outlet area of ​​the heat pump outdoor unit or prevent it from airing normally.

[0028] According to a third aspect of the present invention, the control method for a heat pump outdoor unit is a heat pump outdoor unit according to a first aspect of the present invention. The control method for the heat pump outdoor unit includes: detecting the ambient temperature or the temperature of an outdoor heat exchanger; controlling the heating component according to the ambient temperature or the temperature of the outdoor heat exchanger; and turning on the heating component when the ambient temperature is lower than a first preset temperature or the outdoor heat exchanger temperature is lower than a second preset temperature.

[0029] According to the control method of the outdoor unit of the heat pump according to the embodiment of the present invention, the heating component is controlled according to the ambient temperature or the temperature of the outdoor heat exchanger. The heating component can heat the first air outlet grille to avoid ice and snow blocking the first air outlet, which would reduce the actual air outlet area of ​​the heat pump outdoor unit or prevent it from airing normally.

[0030] According to some embodiments of the present invention, the outdoor unit of the heat pump has a defrosting mode, in which the outdoor heat exchanger acts as a condenser, and the control method of the outdoor unit of the heat pump includes: in the defrosting mode, turning off the heating component.

[0031] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0033] Figure 1 This is a perspective view of a heat pump outdoor unit according to some embodiments of the present invention;

[0034] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the outdoor unit of a medium-temperature heat pump from another angle;

[0035] Figure 3 yes Figure 1 Exploded view of the outdoor unit of a heat pump in China;

[0036] Figure 4yes Figure 3 A three-dimensional schematic diagram of the air outlet frame;

[0037] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0038] Figure 6 yes Figure 4 A cross-sectional view of the air outlet frame in the middle;

[0039] Figure 7 yes Figure 6 Enlarged view of point A in the middle;

[0040] Figure 8 yes Figure 3 A three-dimensional schematic diagram of a portion of the structure of the outdoor unit of a heat pump.

[0041] Figure label:

[0042] 100. Heat pump outdoor unit;

[0043] 1. Outdoor unit casing; 11. Air inlet; 12. Air outlet; 121. First air outlet; 122. Second air outlet; 123. Third air outlet; 13. Drain outlet; 14. First air outlet grille; 141. Grille body; 142. Limiting structure; 143. Limiting hole; 144. First surface; 1441. Guide surface; 145. Second surface; 15. Second air outlet grille; 16. Third air outlet grille;

[0044] 17. Main body of the casing; 171. Middle partition; 172. Mounting cavity; 1721. First mounting cavity; 1722. Second mounting cavity; 173. Front partition; 174. Airflow outlet;

[0045] 18. Air outlet frame; 181. Frame section; 1811. Top of frame; 1812. Bottom of frame; 1813. Side of frame; 182. Front panel;

[0046] 19. Vent cover;

[0047] 2. Heating assembly; 21. Heating element;

[0048] 3. Heat exchange and exhaust components; 31. Outdoor fan. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0050] The following is for reference. Figures 1-8A heat pump outdoor unit 100 according to an embodiment of the present invention is described.

[0051] According to a first aspect of the present invention, a heat pump outdoor unit 100 includes: an outdoor unit housing 1, a heating assembly 2, and a heat exchange and exhaust assembly 3.

[0052] The outdoor unit casing 1 is provided with an air inlet 11 and an air outlet 12, and the heat exchange and exhaust assembly 3 is located inside the outdoor unit casing 1. When the heat pump outdoor unit 100 is working, airflow enters the heat pump outdoor unit 100 through the air inlet 11, then exchanges heat through the heat exchange and exhaust assembly 3, and finally exits the outdoor unit casing 1 through the air outlet 12. For example, the air inlet 11 can be located at the rear of the outdoor unit casing 1, and the air outlet 12 can be located at the front of the outdoor unit casing 1.

[0053] The air outlet 12 includes a first air outlet 121, and a first air outlet grille 14 is provided at the first air outlet 121. By providing the first air outlet grille 14 at the first air outlet 121, the first air outlet grille 14 can block and prevent debris in the outdoor environment, reducing the problem of debris entering the outdoor unit housing 1 through the first air outlet 121 and affecting the internal components of the outdoor unit housing 1.

[0054] The heating assembly 2 includes a heating element 21, which is disposed on the first air outlet grille 14. By including the heating element 21 in the heating assembly 2 and disposing of the heating element 21 on the first air outlet grille 14, the heating element 21 can heat the first air outlet grille 14, raising its temperature and melting the ice and snow on it. This prevents ice and snow from blocking the first air outlet 121, which could reduce the actual air outlet area of ​​the heat pump outdoor unit 100 or prevent it from discharging air normally.

[0055] According to an embodiment of the present invention, the outdoor unit 100 of the heat pump is provided with a first air outlet grille 14 at the first air outlet 121. The first air outlet grille 14 can block and block debris in the outdoor environment, reducing the number of foreign objects entering the outdoor unit casing 1 through the first air outlet 121 and reducing the problem of debris entering the outdoor unit casing 1 through the first air outlet 121 and affecting the internal components of the outdoor unit casing 1. By providing a heating component 2 on the first air outlet grille 14, the heating component 21 can heat the first air outlet grille 14, increase the temperature of the first air outlet grille 14, melt the ice and snow on the first air outlet grille 14, and avoid the problem of ice and snow blocking the first air outlet 121, which would reduce the actual air outlet area of ​​the heat pump outdoor unit 100 or prevent it from airing normally.

[0056] According to some embodiments of the present invention, the first air outlet grille 14 is detachably connected to the outdoor unit housing 1. By making the first air outlet grille 14 detachably connected to the outdoor unit housing 1, it is convenient to clean or replace the first air outlet grille 14. For example, the first air outlet grille 14 can be snap-fitted to the outdoor unit housing 1.

[0057] According to some embodiments of the present invention, with reference to Figure 7 The heating element 21 is located inside the first air outlet grille 14. Since the heat pump outdoor unit 100 is located outdoors, debris such as leaves, dust, and garbage may fall onto the outside of the first air outlet grille 14. If the heating element 21 were located outside the first air outlet grille 14, it might be scratched or corroded by this debris. By placing the heating element 21 inside the first air outlet grille 14, the grille provides some protection, reducing the possibility of damage to the heating element 2 due to external impacts and extending its service life. Furthermore, since the heating element 21 is located inside the first air outlet grille 14, it is essentially housed within the outdoor unit casing 1. Compared to placing the heating element 21 outside the outdoor unit casing 1, this improves safety and reduces the risk of accidental contact with the heating element 21.

[0058] According to some embodiments of the present invention, the heating element 21 is embedded within the first air outlet grille 14. By embedding the heating element 21 within the first air outlet grille 14, the connection between the heating element 21 and the first air outlet grille 14 can be made more complete; by embedding the heating element 21 within the first air outlet grille 14, the risk of burns or electric shocks from accidental contact with the heating element 21 can be avoided or reduced, thereby improving safety.

[0059] According to some embodiments of the present invention, the first air outlet grille 14 is integrally injection molded onto the heating element 21. By integrally injection molding the first air outlet grille 14 onto the heating element 21, the connection between the first air outlet grille 14 and the heating element 21 can be made more secure; and, during installation, there is no need to add a step of connecting the first air outlet grille 14 to the heating element 21, thereby improving installation efficiency.

[0060] According to some embodiments of the present invention, with reference to Figure 6 and Figure 7 The heating element 21 is detachably mounted on the first air outlet grille 14. By making the heating element 21 detachably mounted on the first air outlet grille 14, it is more convenient for relevant personnel to maintain or repair the heating element 21.

[0061] According to some embodiments of the present invention, with reference to Figure 6 and Figure 7The heating element 21 is snapped into the first air outlet grille 14. By snapping the heating element 21 into the first air outlet grille 14, it is easier to assemble and disassemble the heating element 21 and the first air outlet grille 14, and it is easier for relevant personnel to maintain or repair the heating element 21.

[0062] According to some embodiments of the present invention, with reference to Figure 6 and Figure 7 The first air outlet grille 14 includes a grille body 141 and a limiting structure 142. The limiting structure 142 is located inside the first air outlet grille 14, and a limiting hole 143 is provided on the limiting structure 142. The heating element 21 passes through the limiting hole 143. By including the grille body 141 and the limiting structure 142, and by providing a limiting hole 143 on the limiting structure 142, the heating element 21 can be easily installed onto or removed from the first air outlet grille 14.

[0063] According to some embodiments of the present invention, the heating element 21 is an electric heating element 21. By making the heating element 21 an electric heating element 21, it is easier to start and stop the heating element 21, and easier to connect and install the heating element 21. By setting the heating element 21 as an electric heating element 21, it is convenient to control the starting and stopping of the heating element 21, and the heating power of the heating element 21 can also be adjusted, making the control of the heating element 21 more convenient and flexible. The electric heating element 21 can generate heat relatively quickly to heat the top of the frame 1811, and the electric heating element 21 itself can also achieve relatively precise power adjustment, thereby accurately controlling the heat generation.

[0064] According to some embodiments of the present invention, the outdoor unit 100 of the heat pump includes a temperature detection component for detecting the ambient temperature or the temperature of the outdoor heat exchanger. Both the temperature detection component and the heating component 2 are electrically connected to the controller of the outdoor unit 100. When the ambient temperature or the temperature of the outdoor heat exchanger is too low, ice, frost, or snow can easily form on the first air outlet grille 14. By including a temperature detection component in the outdoor unit 100, which can detect the ambient temperature or the temperature of the outdoor heat exchanger, and with both the temperature detection component and the heating component 2 electrically connected to the controller of the outdoor unit 100, the outdoor unit 100 can control the opening or closing of the heating component 2 based on the temperature detected by the temperature detection component. This enables automatic heating of the first air outlet grille 14, removing ice and snow from the first air outlet grille 14, and reducing the risk of the first air outlet 121 being blocked by ice and snow.

[0065] For example, if the temperature detection component detects a low outdoor ambient temperature or a low outdoor heat exchanger temperature, it indicates a significant risk of icing or frosting on the first air outlet grille 14, potentially causing blockage of the first air outlet 121. In this case, the controller of the heat pump outdoor unit 100 can activate the heating element 21 to defrost or melt snow on the first air outlet grille 14. After defrosting or melting snow is complete, the controller of the heat pump outdoor unit 100 can deactivate the heating element 21. Furthermore, when the heating element 21 is activated to defrost or melt snow on the first air outlet grille 14, its heating power can be adjusted according to the outdoor ambient temperature or the outdoor heat exchanger temperature; for example, the lower the outdoor ambient temperature or the lower the outdoor heat exchanger temperature, the higher the heating power can be adjusted.

[0066] According to some embodiments of the present invention, with reference to Figures 1-4 The first air outlet 121 is located at the top of the outdoor unit housing 1. By placing the first air outlet 121 at the top of the outdoor unit housing 1, at least part of the airflow can be discharged from the top of the outdoor unit housing 1, reducing the discomfort caused by the front airflow impact on the human body. Furthermore, by setting the first air outlet grille 14 and the heating component 2 at the first air outlet 121 located at the top, it is possible to effectively reduce the entry of external debris into the outdoor unit housing 1 through the first air outlet 121. The heating component 2 can remove ice and snow from the first air outlet grille 14, reducing the risk of the first air outlet 121 being blocked by ice and snow.

[0067] According to some embodiments of the present invention, with reference to Figure 6 and Figure 7 At least a portion of the upper surface of the first air outlet grille 14 constitutes a guide surface 1441, which extends downward at an angle. By making at least a portion of the upper surface of the first air outlet grille 14 constitute a guide surface 1441 and making the guide surface 1441 extend downward at an angle, snow water falling onto the guide surface 1441 can flow downward along the guide surface 1441 under its own gravity and eventually leave the guide surface 1441, thus preventing excessive snow water from accumulating on the guide surface 1441 and clogging the first air outlet 121.

[0068] According to some embodiments of the present invention, with reference to Figure 6 and Figure 7The angle between the guide surface 1441 and the horizontal plane is α, where 0° < α ≤ 15°. For example, the value of α can be 1°, 3°, 6°, 9°, 12°, 15°, etc. By making the angle α between the guide surface 1441 and the horizontal plane greater than 0°, the guide surface 1441 can have a downward sloping characteristic, avoiding excessive snow water accumulation on the guide surface 1441 and affecting the air outlet 121. By making the angle α between the guide surface 1441 and the horizontal plane not exceed 15°, the airflow can flow more smoothly from the first air outlet 121 at the top, reducing the flow resistance of the airflow from the first air outlet 121 at the top.

[0069] According to some embodiments of the present invention, with reference to Figure 6 and Figure 7 The guide surface 1441 extends downward at an angle in the front-to-back direction. By extending the guide surface 1441 downward at an angle in the front-to-back direction, the guide surface 1441 can guide the snow water, so that the snow water falling on the guide surface 1441 flows downward under its own gravity. Since the first air outlet 121 is located at the front end of the outdoor unit casing 1, this part of the snow water can leave the top of the heat pump outdoor unit 100 from the front end of the outdoor unit casing 1, and is more easily discharged from the front side of the outdoor unit casing 1, thus more effectively reducing the accumulation of snow or water on the top of the heat pump outdoor unit 100.

[0070] According to some embodiments of the present invention, with reference to Figure 6 and Figure 7 The guide surface 1441 extends downwards in a back-to-forehead direction. Since there is usually a large space in front of the heat pump outdoor unit 100, snowmelt is more easily discharged from the heat pump outdoor unit 100. By making the guide surface 1441 extend downwards in a back-to-forehead direction, it can guide the snowmelt, causing the snowmelt falling onto the guide surface 1441 to flow downwards and forwards under its own gravity, making it easier to discharge from the heat pump outdoor unit 100.

[0071] For example, the air inlet 11 of the heat pump outdoor unit 100 is located at the rear of the heat pump outdoor unit 100. By making the guide surface 1441 extend downward in the direction from back to front, the snow water falling on the guide surface 1441 flows downward and forward under its own gravity, which can prevent the snow water from blocking the air inlet 11 of the heat pump outdoor unit 100 and causing insufficient air intake of the heat pump outdoor unit 100.

[0072] According to some embodiments of the present invention, the upper surface of the outdoor unit housing 1 includes a second surface 145 located in front of the first air outlet 121, and the second surface 145 is not higher than the first surface 144. After snow water falls into the first surface 144, it flows along the first surface 144 under its own gravity to the space between the first surface 144 and the second surface 145. By ensuring that the second surface 145 is not higher than the first surface 144, the accumulation of this snow water between the second surface 145 and the first surface 144 can be avoided, making it easier for this snow water to be discharged from the heat pump outdoor unit 100.

[0073] For example, the second surface 145 is level with the lowest point of the first surface 144; or, for another example, the second surface 145 is lower than the lowest point of the first surface 144.

[0074] According to some embodiments of the present invention, with reference to Figure 3 and Figure 8 The outdoor unit housing 1 includes a housing body 17, a front partition 173, and an air outlet frame 18. The air outlet frame 18 is located on the front side of the housing body 17. The front partition 173 is located between the housing body 17 and the air outlet frame 18. The housing body 17 and the front partition 173 together define an installation cavity 172. The heat exchange and exhaust assembly 3 is located in the installation cavity 172. The air outlet frame 18 and the front partition 173 together define an air outlet cavity. The front partition 173 is provided with an air outlet 174. The air outlet 174 connects the air outlet cavity and the installation cavity 172. The housing body 17 is provided with an air inlet 11 that communicates with the installation cavity 172. The air outlet frame 18 is provided with an air outlet 12 that communicates with the air outlet cavity. When the heat pump outdoor unit 100 is working, the outside air enters the installation cavity 172 through the air inlet 11 and flows to the heat exchange and exhaust assembly 3. After being heated by the heat exchange and exhaust assembly 3, the air flows to the air outlet cavity through the air outlet 174 and then flows out to the outside of the heat pump outdoor unit 100 from the air outlet 12.

[0075] The heat exchange exhaust assembly 3 is installed inside the mounting cavity 172. This assembly exchanges heat with the airflow entering the mounting cavity 172 and guides the heat-exchanged airflow to the air outlet 174, allowing it to flow out smoothly from there. The air outlet 174 connects the air outlet cavity and the mounting cavity 172, enabling the airflow in the mounting cavity 172 to flow smoothly into the air outlet cavity and then be discharged from the air outlet 12.

[0076] The air outlet frame 18 is located on the front side of the main body 17 of the casing. The main body 17 of the casing and the front partition 173 together define the mounting cavity 172, and the air outlet frame 18 and the front partition 173 together define the air outlet cavity. The heat exchange exhaust assembly 3 is located in the mounting cavity 172, and the air outlet frame 18 has an air outlet 12 that communicates with the air outlet cavity. This allows the air outlet cavity and the mounting cavity 172 to be arranged in an orderly manner, reducing the space occupied by the air outlet cavity in the mounting cavity 172, which is beneficial to the layout optimization within the mounting cavity 172. Furthermore, by defining the air outlet cavity together with the front partition 173, the air flow cross-section of the air in the air outlet cavity can be larger than the air flow cross-section at the air outlet 174. In this way, under the condition of constant air flow, the air flow cross-section of the air in the air outlet cavity is larger than the air flow cross-section at the air outlet 174, which can buffer the airflow flowing out from the air outlet 174. This can reduce or avoid the airflow directly impacting the human body at an excessively high flow rate, thereby reducing human discomfort and improving the user experience.

[0077] Optionally, refer to Figure 8 The air outlet 174 can be covered by an air outlet mesh cover 19, which prevents foreign objects from entering the air outlet cavity and then entering the installation cavity 172.

[0078] According to some embodiments of the present invention, with reference to Figure 2 and Figure 8 The outdoor unit housing 1 includes a partition 171, which is disposed inside the housing body 17 to divide the mounting cavity 172 into a first mounting cavity 1721 and a second mounting cavity 1722 arranged in the left-right direction. The heat exchange and exhaust assembly 3 includes an outdoor heat exchanger, an outdoor fan 31 and a compressor. The outdoor heat exchanger and the outdoor fan 31 are disposed in the first mounting cavity 1721, and the compressor is disposed in the second mounting cavity 1722. The air inlet 11 and the air outlet are both connected to the first mounting cavity 1721.

[0079] The mounting cavity 172 is divided into a first mounting cavity 1721 and a second mounting cavity 1722 by the partition plate 171. This allows the outdoor heat exchanger and outdoor fan 31 in the first mounting cavity 1721 to be spaced apart from the compressor in the second mounting cavity 1722. This ensures that the outdoor heat exchanger, outdoor fan 31 and compressor are arranged in an orderly manner and avoids mutual interference between them. By placing the compressor in a different cavity from the outdoor heat exchanger and outdoor fan 31, the interference of the compressor on the outdoor heat exchanger and outdoor fan 31 can be reduced.

[0080] Both the air inlet 11 and the air outlet are connected to the first mounting cavity 1721, allowing external air to enter the first mounting cavity 1721 through the air inlet 11 and exchange heat with the outdoor heat exchanger. The airflow after heat exchange can flow into the air outlet cavity through the air outlet 174 under the drive of the outdoor fan 31, be buffered, and then discharged to the outside of the heat pump outdoor unit 100, reducing the discomfort caused by the impact of the airflow on the human body.

[0081] Furthermore, the mounting cavity 172 is divided into a first mounting cavity 1721 and a second mounting cavity 1722 by a partition 171. This partitioned design makes the maintenance and repair of each component more convenient. Maintenance personnel can selectively open the corresponding cavities for inspection and repair without having to disassemble the entire heat pump outdoor unit 100 on a large scale. For example, if the outdoor fan 31 malfunctions, only the relevant part of the first mounting cavity 1721 needs to be opened for repair, without affecting the compressor located in the second mounting cavity 1722, which greatly shortens the maintenance time and improves maintenance efficiency.

[0082] Reference Figure 8 According to some embodiments of the present invention, the projection of the first mounting cavity 1721 onto the reference plane is a first projection, the projection of the second mounting cavity 1722 onto the reference plane is a second projection, and the projection of the air outlet cavity onto the reference plane is a third projection. At least a portion of the first projection coincides with the third projection, and at least a portion of the second projection coincides with the third projection. The reference plane is a plane perpendicular to the front-back direction. The coincidence of at least a portion of the first projection with the third projection can include the following: for example, a portion of the first projection coincides with the third projection; or, for example, the entire first projection coincides with the third projection. The coincidence of at least a portion of the second projection with the third projection can include the following: for example, a portion of the second projection coincides with the third projection; or, for example, the entire second projection coincides with the third projection.

[0083] By aligning at least a portion of the first projection with the third projection, at least a portion of the air cavity is positioned relative to the first mounting cavity 1721 in the front-back direction. Furthermore, by aligning at least a portion of the second projection with the third projection, at least a portion of the air cavity is positioned relative to the second mounting cavity 1722 in the front-back direction. This results in a larger air outlet cross-sectional area for the air cavity. Consequently, when the airflow in the first mounting cavity 1721 flows into the larger air outlet cross-sectional area through the air outlet 174, the increased airflow area effectively reduces the flow velocity and impact force of the airflow entering the air outlet. This provides better buffering for the airflow entering the air outlet, and the airflow buffered by the air outlet 12 is discharged from the air outlet, thus reducing discomfort caused by the impact on the human body.

[0084] Reference Figure 8According to some embodiments of the present invention, the depth dimension of the air outlet cavity in the front-to-back direction is smaller than the depth dimension of the mounting cavity 172 in the front-to-back direction. By making the depth dimension of the air outlet cavity in the front-to-back direction smaller than the depth dimension of the mounting cavity 172 in the front-to-back direction, the air outlet cavity can buffer the airflow flowing out from the airflow outlet 174, while the overall size of the heat pump outdoor unit 100 in the front-to-back direction can be reduced, thereby reducing the space occupied by the heat pump outdoor unit 100 as a whole.

[0085] Reference Figure 8 According to some embodiments of the present invention, the ratio of the depth dimension of the air outlet cavity in the front-to-back direction to the depth dimension of the mounting cavity 172 in the front-to-back direction ranges from 0.1 to 0.5. For example, the ratio of the depth dimension of the air outlet cavity in the front-to-back direction to the depth dimension of the mounting cavity 172 in the front-to-back direction can be 0.1, 0.2, 0.3, 0.4, 0.5, etc. By ensuring that the ratio of the depth dimension of the air outlet cavity in the front-to-back direction to the depth dimension of the mounting cavity 172 in the front-to-back direction is not less than 0.1, the air outlet cavity can effectively buffer the airflow, thereby reducing the discomfort caused by the impact of excessively high airflow velocity on the human body. By ensuring that the ratio of the depth dimension of the air outlet cavity in the front-to-back direction to the depth dimension of the mounting cavity 172 in the front-to-back direction is not greater than 0.5, the depth dimension of the air outlet cavity in the front-to-back direction can be set more reasonably. As a result, while reducing the discomfort caused by the impact of the airflow on the human body, the overall size of the heat pump outdoor unit 100 in the front-to-back direction can be smaller, thereby reducing the space occupied by the heat pump outdoor unit 100.

[0086] By setting the ratio of the depth dimension of the air outlet cavity in the front-to-back direction to the depth dimension of the mounting cavity 172 in the front-to-back direction to a range of 0.1 to 0.5, the buffering effect of the air outlet cavity on the airflow and the overall front-to-back dimensions of the heat pump outdoor unit 100 can be well balanced.

[0087] According to some embodiments of the present invention, with reference to Figure 3 The air outlet frame 18 is detachably connected to the main body 17 of the housing. This facilitates the maintenance or replacement of either the air outlet frame 18 or the main body 17. For example, one of the air outlet frame 18 and the main body 17 may have a hook, while the other may have a slot. By engaging the hook and slot, the air outlet frame 18 and the main body 17 can be detachably connected, making the connection between the air outlet frame 18 and the housing simple and highly stable. Alternatively, the air outlet frame 18 and the main body 17 may be connected by fasteners, which also achieves a detachable connection.

[0088] According to some embodiments of the present invention, with reference to Figure 3 and Figure 4 The air outlet frame 18 includes a frame portion 181 and a front panel 182. The frame portion 181 is annular, and the front panel 182 covers the front side of the frame portion 181. The frame portion 181 is connected between the front panel 182 and the main body 17 of the housing. The air outlet 12 is formed in the frame portion 181.

[0089] The frame 181 supports the front panel 182. The front panel 182, covering the front of the frame 181, conceals the internal structure of the air outlet frame 18, improving the overall aesthetics of the heat pump outdoor unit 100. The air outlet 12 formed on the frame 181 allows airflow to pass around the perimeter of the heat pump outdoor unit 100, such as from the top, side, or bottom, preventing discomfort caused by direct airflow from the front.

[0090] For example, when the outdoor unit 100 of the heat pump in the related technology is installed on the ground floor facing the road, the airflow after heat exchange blows out from the front side of the outdoor unit 100, which may blow onto pedestrians, making them feel uncomfortable, especially in the hot summer, when the hot air after heat exchange blows onto pedestrians, which will aggravate the discomfort. By forming the air outlet 12 on the frame 181, the airflow can be discharged around the periphery of the outdoor unit 100, which can effectively reduce the discomfort of the airflow blowing directly onto pedestrians from the front side of the outdoor unit 100.

[0091] According to some embodiments of the present invention, with reference to Figure 4 The frame portion 181 includes a frame top 1811, which is located at the top of the frame portion 181. The first air outlet 121 is located at the frame top 1811. By setting the first air outlet 121 at the frame top 1811, the airflow can be discharged more smoothly from the frame top 1811 to the outside of the heat pump outdoor unit 100. For example, in the hot summer, the temperature of the airflow after heat exchange in the heat pump outdoor unit 100 is high. According to the physical property that hot air rises, the high-temperature airflow will flow upward. By setting at least a part of the air outlet 121 at the frame top 1811, this part of the high-temperature airflow can be discharged more smoothly from the air outlet 12 to the outside of the heat pump outdoor unit 100, and the discomfort caused by the airflow to the human body can be reduced.

[0092] According to some embodiments of the present invention, with reference to Figure 2 The frame portion 181 includes a frame bottom 1812 located at the bottom, and the air outlet 12 includes a second air outlet 122 disposed at the frame bottom 1812. At least a portion of the second air outlet 122 constitutes a drain outlet 13.

[0093] Wherein, at least a portion of the second air outlet 122 constitutes the drain outlet 13, which may include the following situations: for example, a portion of the second air outlet 122 may constitute the drain outlet 13; or, for another example, the entire second air outlet 122 may constitute the drain outlet 13.

[0094] By providing a second air outlet 122 at the bottom of the frame 1812, the air outlet area can be increased, and it can also serve as a drain outlet 13. In this way, water flowing down from the top of the frame 1811 into the air outlet cavity can be discharged through the second air outlet 122 or the drain outlet 13 at the bottom of the frame 1812, thus preventing water from accumulating in the air outlet cavity.

[0095] Optionally, a second air outlet grille 15 can be installed at the second air outlet 122 to reduce the entry of external foreign objects into the outdoor unit housing 1 from the second air outlet 122.

[0096] According to some embodiments of the present invention, with reference to Figures 1-4 The frame portion 181 includes a bottom frame 1812 and a side frame 1813. The top frame 1811 is located at the top of the frame portion 181, the bottom frame 1812 is located at the bottom of the frame portion 181, and the side frame 1813 is connected to the left and right sides of the top frame 1811 and the bottom frame 1812. The air outlet 12 includes a third air outlet 123, which is located on the side frame 1813. The first air outlet 121 at the top of the frame 1811 facilitates the upward discharge of high-temperature airflow. The third air outlet 123 on the side of the frame 1813 increases the air outlet area from the side of the heat pump outdoor unit 100, which can prevent airflow from accumulating on the side and further improve the overall air outlet efficiency. By forming air outlets 12 at both the top of the frame 1811 and the side of the frame 1813, the air outlet area can be increased, the overall air outlet efficiency of the heat pump outdoor unit 100 can be improved, and the airflow can also be prevented from directly impacting the human body at an excessively high flow rate from the front of the frame 181, thereby reducing human discomfort.

[0097] Optionally, a third air outlet grille 16 can be installed at the third air outlet 123 to reduce the entry of foreign objects into the outdoor unit housing 1 from the third air outlet 123.

[0098] Reference Figures 1-4 According to some embodiments of the present invention, the first air outlet 121 includes a plurality of spaced-apart first sub-air outlets 12, and the third air outlet 123 includes a plurality of spaced-apart second sub-air outlets 12. The cross-sectional area of ​​a single first sub-air outlet 12 is smaller than that of a single second sub-air outlet 12. The smaller cross-sectional area of ​​the plurality of first sub-air outlets 12 on the top of the frame 1811 effectively prevents foreign objects from directly entering the air outlet cavity. The larger cross-sectional area of ​​the second sub-air outlets 12 on the side of the frame 1813 allows airflow to be discharged more smoothly from the side to the outside of the heat pump outdoor unit 100, which is beneficial to improving the air outlet efficiency of the heat pump outdoor unit 100.

[0099] Reference Figures 1-4 According to some embodiments of the present invention, the air outlet 12 is arranged around the frame portion 181, so that the airflow can be discharged from the frame portion 181 in multiple directions to the outside of the heat pump outdoor unit 100. This can increase the air outlet area, improve the air outlet efficiency, and reduce the discomfort caused by the impact of the air outlet airflow on the human body.

[0100] A heat pump system according to a second aspect of the present invention includes: an indoor air conditioning unit and an outdoor heat pump unit 100 according to a first aspect of the present invention.

[0101] According to the embodiments of the present invention, the heat pump system includes a heat pump outdoor unit 100 according to the first aspect of the present invention, which reduces the problem of debris entering the outdoor unit casing 1 through the first air outlet 121 and affecting the components inside the outdoor unit casing 1; and avoids ice and snow blocking the first air outlet 121, which would reduce the actual air outlet area of ​​the heat pump outdoor unit 100 or prevent it from airing normally.

[0102] According to a third aspect embodiment of the present invention, the heat pump outdoor unit 100 is a heat pump outdoor unit 100 according to a first aspect embodiment of the present invention, and the control method of the heat pump outdoor unit 100 includes:

[0103] Detect the ambient temperature or the temperature of the outdoor heat exchanger;

[0104] Control the heating component 2 according to the ambient temperature or the temperature of the outdoor heat exchanger;

[0105] When the ambient temperature is lower than the first preset temperature or the outdoor heat exchanger temperature is lower than the second preset temperature, the heating component 2 is turned on, wherein the first preset temperature can be higher than the second preset temperature.

[0106] When the outdoor unit 100 of the heat pump is working, if the ambient temperature is too low or the outdoor heat exchanger temperature is too low, for example, when the ambient temperature is lower than the first preset temperature or the outdoor heat exchanger temperature is lower than the second preset temperature, there is a greater risk of ice or frost forming on the first air outlet grille 14 or a greater possibility of snow accumulation. The heating component 2 is turned on to heat and melt the ice, frost or snow on the first air outlet grille 14 to remove it, so as to prevent ice and snow from blocking the first air outlet 121.

[0107] According to the control method of the heat pump outdoor unit 100 of the present invention, the heating component 2 is controlled according to the ambient temperature or the temperature of the outdoor heat exchanger. The heating component 2 can heat the first air outlet grille 14 to avoid ice and snow blocking the first air outlet 121, which would reduce the actual air outlet area of ​​the heat pump outdoor unit 100 or prevent it from airing normally.

[0108] According to some embodiments of the present invention, the outdoor unit 100 of the heat pump has a defrosting mode, in which the outdoor heat exchanger acts as a condenser, and the control method of the outdoor unit 100 of the heat pump includes: in the defrosting mode, turning off the heating component 2.

[0109] When the outdoor unit 100 of the heat pump is in defrost mode, the outdoor heat exchanger acts as a condenser and can generate heat. The heat generated by the outdoor heat exchanger can not only melt and remove the frost, ice or snow attached to the outdoor heat exchanger, but also transfer the heat generated by the outdoor heat exchanger to the first air outlet 121 through airflow. This can melt and remove the frost, ice or snow on the first air outlet grille 14 located at the first air outlet 121. At this time, the heating component 2 can be turned off, which can save energy and reduce energy consumption.

[0110] The following reference Figures 1-8 A heat pump outdoor unit 100 according to some specific embodiments of the present invention is described.

[0111] In this embodiment, the heat pump outdoor unit 100 includes: an outdoor unit housing 1, a heating component 2, and a heat exchange and exhaust component 3, wherein the heat exchange and exhaust component 3 is disposed inside the outdoor unit housing 1.

[0112] The outdoor unit housing 1 is provided with an air inlet 11 and an air outlet 12. The air outlet 12 includes a first air outlet 121, which is located at the top of the outdoor unit housing 1. A first air outlet grille 14 is provided at the first air outlet 121, and the first air outlet grille 14 is detachably connected to the outdoor unit housing 1. At least a portion of the upper surface of the first air outlet grille 14 forms a guide surface 1441, which extends downward at an angle from back to front. The angle between the guide surface 1441 and the horizontal plane is α, where 0° < α ≤ 15°.

[0113] The outdoor unit housing 1 includes a housing body 17, a front partition 173, and an air outlet frame 18. The air outlet frame 18 is located on the front side of the housing body 17. The front partition 173 is located between the housing body 17 and the air outlet frame 18. The housing body 17 and the front partition 173 together define an installation cavity 172. The heat exchange and exhaust assembly 3 is located in the installation cavity 172. The air outlet frame 18 and the front partition 173 together define an air outlet cavity. The front partition 173 is provided with an air outlet 174. The air outlet 174 connects the air outlet cavity and the installation cavity 172. The housing body 17 is provided with an air inlet 11 that communicates with the installation cavity 172. The air outlet frame 18 is provided with an air outlet 12 that communicates with the air outlet cavity.

[0114] The outdoor unit housing 1 includes a partition 171, which is disposed inside the housing body 17 to divide the mounting cavity 172 into a first mounting cavity 1721 and a second mounting cavity 1722 arranged in the left-right direction. The heat exchange and exhaust assembly 3 includes an outdoor heat exchanger, an outdoor fan 31 and a compressor. The outdoor heat exchanger and the outdoor fan 31 are disposed in the first mounting cavity 1721, and the compressor is disposed in the second mounting cavity 1722. The air inlet 11 and the air outlet are both connected to the first mounting cavity 1721.

[0115] The air outlet frame 18 is detachably connected to the main body 17 of the housing. The air outlet frame 18 includes a frame portion 181 and a front panel 182. The frame portion 181 is annular, and the front panel 182 covers the front side of the frame portion 181. The frame portion 181 is connected between the front panel 182 and the main body 17 of the housing. An air outlet 12 is formed in the frame portion 181. The frame portion 181 includes a frame top 1811, which is located at the top of the frame portion 181. A first air outlet 121 is located at the frame top 1811. The frame portion 181 includes a frame bottom 1812 located at the bottom, and the air outlet 12 includes a second air outlet 122, which is disposed at the frame bottom 1812. At least a portion of the second air outlet 122 constitutes a drain outlet 13. The frame portion 181 includes the frame bottom 1812 and the frame side portion 1813. The frame top 1811 is located at the top of the frame portion 181, and the frame bottom 1812 is located at the bottom of the frame portion 181. The frame side portion 1813 connects the left and right sides of the frame top 1811 and the frame bottom 1812. The air outlet 12 includes a third air outlet 123, which is disposed at the frame side portion 1813.

[0116] The heating assembly 2 includes a heating element 21, which is an electric heating element 21, and is disposed on the first air outlet grille 14. The heating element 21 is located inside the first air outlet grille 14 and is detachably installed on the first air outlet grille 14. The heating element 21 is connected to the first air outlet grille 14 by a snap-fit ​​connection. The first air outlet grille 14 includes a grille body 141 and a limiting structure 142, which is located inside the first air outlet grille 14. The limiting structure 142 has a limiting hole 143, through which the heating element 21 passes.

[0117] The heat pump outdoor unit 100 includes a temperature detection component, which is used to detect the ambient temperature or the temperature of the outdoor heat exchanger. The temperature detection component and the heating component 2 are both electrically connected to the controller of the heat pump outdoor unit 100.

[0118] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, 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 invention.

[0119] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0120] In the description of this invention, "a plurality of" means two or more.

[0121] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0122] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0123] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0124] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A heat pump outdoor unit, characterized in that, include: An outdoor unit housing includes a housing body, a front partition, and an air outlet frame. The air outlet frame is located on the front side of the housing body. The front partition is located between the housing body and the air outlet frame. The housing body and the front partition together define an installation cavity, and the air outlet frame and the front partition together define an air outlet cavity. The outdoor unit housing includes a middle partition, which is located within the housing body to divide the installation cavity into a first installation cavity and a second installation cavity arranged in a left-right direction. The heat exchange and exhaust assembly includes an outdoor heat exchanger and an outdoor... The fan and compressor are provided, the outdoor heat exchanger and the outdoor fan are provided in the first mounting cavity, the compressor is provided in the second mounting cavity, the air inlet and the air outlet are both connected to the first mounting cavity, the projection of the first mounting cavity on the reference plane is the first projection, the projection of the second mounting cavity on the reference plane is the second projection, the projection of the air outlet on the reference plane is the third projection, at least a part of the first projection coincides with the third projection, at least a part of the second projection coincides with the third projection, and the reference plane is a plane perpendicular to the front and rear direction; The front partition is provided with an airflow outlet, which connects the air outlet cavity and the mounting cavity. The main body of the housing is provided with an air inlet that communicates with the mounting cavity. The air outlet frame is provided with an air outlet that communicates with the air outlet cavity. The air outlet frame includes a frame top located at the top. The air outlet includes a first air outlet located at the frame top. A first air outlet grille is provided at the first air outlet. The air outlet frame includes a frame portion and a front panel. The frame portion is annular, and the front panel covers the front side of the frame portion. The frame portion is connected between the front panel and the main body of the housing. The air outlet is formed in the frame portion. The frame portion includes a frame top, a frame bottom, and a frame side portion. The frame top is located at the top of the frame portion, the frame bottom is located at the bottom of the frame portion, and the frame side portion is connected to the left and right sides of the frame top and frame bottom. The air outlet includes a second air outlet, which is located at the bottom of the frame. At least a portion of the second air outlet constitutes a drain outlet. The air outlet also includes a third air outlet, which is located on the frame side portion. A second air outlet grille is provided at the second air outlet, and a third air outlet grille is provided at the third air outlet. The first air outlet includes a plurality of spaced-apart first sub-air outlets, and the third air outlet includes a plurality of spaced-apart second sub-air outlets. The cross-sectional area of ​​a single first sub-air outlet is smaller than the cross-sectional area of ​​a single second sub-air outlet. The heating assembly includes a heating element disposed on the first air outlet grille and embedded within the first air outlet grille. The first air outlet grille is integrally injection molded onto the heating element. The outdoor unit of the heat pump has a defrosting mode. In the defrosting mode, the outdoor heat exchanger acts as a condenser, and the heating assembly is turned off. A temperature detection component is used to detect the temperature of the outdoor heat exchanger. Both the temperature detection component and the heating component are electrically connected to the controller of the outdoor unit of the heat pump. The heat exchange and exhaust assembly is located inside the mounting cavity.

2. The outdoor unit of the heat pump according to claim 1, characterized in that, The first air outlet grille is detachably connected to the outdoor unit housing.

3. The outdoor unit of the heat pump according to claim 1, characterized in that, The heating element is an electric heating element.

4. The outdoor unit of the heat pump according to claim 1, characterized in that, At least a portion of the upper surface of the first air outlet grille forms a guide surface, which extends downward at an angle.

5. The outdoor unit of the heat pump according to claim 4, characterized in that, The angle between the guide surface and the horizontal plane is α, where 0° < α ≤ 15°.

6. The outdoor unit of the heat pump according to claim 4, characterized in that, The guide surface extends downward at an angle in the front-to-back direction.

7. The outdoor unit of the heat pump according to claim 6, characterized in that, The guide surface extends downwards in a direction from back to front.

8. The outdoor unit of the heat pump according to any one of claims 1-7, characterized in that, The air outlet frame is detachably connected to the main body of the casing.

9. A heat pump system, characterized in that, include: Air conditioner indoor unit; The outdoor unit of the heat pump according to any one of claims 1-8.

10. A control method for a heat pump outdoor unit, characterized in that, The heat pump outdoor unit is a heat pump outdoor unit according to any one of claims 1-8, and the control method of the heat pump outdoor unit includes: Detect the temperature of the outdoor heat exchanger; The heating assembly is controlled according to the temperature of the outdoor heat exchanger; When the temperature of the outdoor heat exchanger is lower than the second preset temperature, the heating component is turned on.

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