Air conditioner outdoor unit and air conditioner

Abstract

The utility model relates to the technical field of air conditioning, and discloses an air conditioner outdoor unit which comprises a compressor, a condenser, a throttling device, a cooling pipeline and a self-adaptive injection valve. The air inlet end of the condenser communicates with an exhaust port of the compressor; the liquid inlet end of the throttling device is communicated with the liquid outlet end of the condenser; one end of the cooling pipeline is communicated with the liquid outlet end of the condenser, the other end of the cooling pipeline is communicated with an air suction port of the compressor, and a first part of the cooling pipeline extends to the computer board to exchange heat with the computer board; and the self-adaptive injection valve is arranged on the cooling pipeline, the self-adaptive injection valve is opened under the condition that the pressure difference between the two ends exceeds a preset value so that part of the refrigerant can return to an air suction port of the compressor after throttling and pressure reduction, and the opening degree of the self-adaptive injection valve is in positive correlation with the pressure difference. The utility model further discloses the air conditioner.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, such as an outdoor unit for an air conditioner or an air conditioner. Background Technology

[0002] When an air conditioner operates in cooling mode in a high-temperature environment, the compressor's suction and discharge temperatures will rise, and the temperature of the circuit board will also rise, causing the air conditioner to stop cooling.

[0003] To improve the cooling capacity of air conditioners in high-temperature environments, a chip heat exchanger and an inverter air conditioner are disclosed in related technologies. The chip heat exchanger includes a capillary tube, an outdoor heat exchanger, an indoor heat exchanger, and a compressor. The first part of the capillary tube is located below the chip on the air conditioner's circuit board. The first end of the capillary tube is connected to the indoor heat exchanger, and the second end of the capillary tube is connected to the outdoor heat exchanger. The indoor and outdoor heat exchangers are respectively connected to the compressor. By leading the first part of the capillary tube of the refrigerant system to the area below the chip on the circuit board, it absorbs heat from the chip, lowers the chip temperature, and solves the problem of insufficient cooling capacity due to poor heat dissipation of the chip on the inverter air conditioner's circuit board under high-temperature conditions in summer.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] The air conditioners in the relevant technologies can only reduce the temperature of the circuit board, but cannot reduce the suction and exhaust temperatures of the compressor. The continuous cooling capacity of the air conditioners under high-temperature conditions needs to be further improved.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides an outdoor unit for an air conditioner and an air conditioner to improve the cooling capacity of the air conditioner in high-temperature environments.

[0009] In some embodiments, the outdoor unit of the air conditioner includes a compressor, a condenser, a throttling device, a cooling pipeline, and an adaptive injection valve. The compressor has an intake port and an exhaust port. The condenser has its intake end connected to the exhaust port of the compressor. The throttling device has its inlet end connected to the outlet end of the condenser. The cooling pipeline has one end connected to the outlet end of the condenser and the other end connected to the intake port of the compressor. A first portion of the cooling pipeline extends to a control board for heat exchange. The adaptive injection valve is located in the cooling pipeline. The adaptive injection valve opens when the pressure difference between its two ends exceeds a preset value, causing a portion of the refrigerant to be throttled and depressurized before returning to the intake port of the compressor. The opening degree of the adaptive injection valve is positively correlated with the pressure difference.

[0010] In some embodiments, in the cooling pipeline, the refrigerant flows sequentially through a first part of the cooling pipeline and the adaptive injection valve, and the refrigerant before being throttled and depressurized by the adaptive injection valve cools the computer board.

[0011] In some embodiments, the cooling pipeline includes a main pipe and a branch pipe. The two ends of the main pipe are respectively connected to the liquid outlet of the condenser and the air intake of the compressor. One end of the branch pipe is connected to the main pipe and the other end extends to the computer board. The height of the computer board is lower than the connection position between the branch pipe and the main pipe.

[0012] In some embodiments, in the cooling pipeline, the refrigerant flows sequentially through the adaptive injection valve and the first part of the cooling pipeline, and the refrigerant after being throttled and depressurized by the adaptive injection valve cools the computer board.

[0013] In some embodiments, the adaptive injection valve includes a housing, an inner tube, a piston, and a return spring. The housing has a refrigerant outlet. The inner tube is disposed within the housing; its inner wall defines a first channel, and its outer wall and the inner wall of the housing together define a second channel. A throttling orifice is provided on the side wall of the inner tube, connecting the first and second channels. The inner tube also has a refrigerant inlet. The piston is slidably disposed within the inner tube and slidably seals against its inner wall. When the piston slides, it adjusts the opening of the throttling orifice. The return spring is disposed within the inner tube and elastically connected to the side of the piston facing away from the refrigerant inlet. In its initial state, the return spring positions the piston in a position that blocks the throttling orifice.

[0014] In some embodiments, the throttling channel includes a plurality of throttling orifices, which are spaced apart along the axial direction of the inner tube, and the number of throttling orifices in the conducting state is positively correlated with the pressure difference across the adaptive injection valve.

[0015] In some embodiments, the diameter of the plurality of throttling orifices gradually decreases from the first end of the inner tube to the second end of the inner tube.

[0016] In some embodiments, the plurality of throttling orifices are located along a plurality of radial lines of the inner tube.

[0017] In some embodiments, the throttling channel includes a throttling groove, the dimension of the throttling groove along the axial direction of the inner tube is the length of the throttling groove, the dimension of the throttling groove along the circumferential direction of the inner tube is the width of the throttling groove, the length of the throttling groove is greater than the width of the throttling groove, and the opening of the throttling groove is continuously changed when the piston slides continuously.

[0018] In some embodiments, the width of the throttling groove gradually decreases from the first end of the inner tube to the second end of the inner tube.

[0019] In some embodiments, the throttling groove is spiral-shaped.

[0020] In some embodiments, the inner tube is divided into a first tube segment and a second tube segment, the throttling channel is opened in the first tube segment, and the second tube segment of the inner tube is connected to the second channel or to the air intake of the compressor.

[0021] In some embodiments, the second section of the inner tube is provided with a drain port to discharge liquid refrigerant.

[0022] In some embodiments, an air conditioner includes an indoor unit and an outdoor unit, wherein the indoor unit is provided with an evaporator, the liquid inlet of the evaporator is connected to the liquid outlet of a throttling device, and the gas outlet of the evaporator is connected to the suction end of a compressor.

[0023] The outdoor unit and air conditioner provided in this disclosure can achieve the following technical effects:

[0024] The outdoor unit of the air conditioner provided in this embodiment features an adaptive injection valve that can open the cooling pipeline when the compressor's suction and discharge temperatures are high, thereby cooling the circuit board and compressor. This reduces the number of times the air conditioner stops under high-temperature conditions and improves its cooling capacity under such conditions. The adaptive injection valve adjusts its opening according to the compressor's suction and discharge temperatures, ensuring that the refrigerant flow in the cooling pipeline matches the compressor's cooling requirements. This improves the air conditioner's continuous cooling capacity under high-temperature conditions while mitigating the impact on its cooling or heating capacity.

[0025] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0026] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0027] Figure 1 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this disclosure;

[0028] Figure 2 This is a schematic diagram of the structure of another air conditioner provided in an embodiment of this disclosure;

[0029] Figure 3 This is a schematic diagram of the structure of another air conditioner provided in an embodiment of this disclosure;

[0030] Figure 4 This is a schematic diagram of the structure of an adaptive injection valve for an outdoor air conditioning unit provided in an embodiment of this disclosure;

[0031] Figure 5 This is a schematic diagram of the structure of an adaptive injection valve for another air conditioner outdoor unit provided in this embodiment.

[0032] Figure label:

[0033] 10: Outdoor unit of air conditioner; 100: Computer board; 200: Compressor; 300: Condenser; 400: Throttling device; 500: Evaporator; 600: Cooling pipe; 700: Adaptive injection valve; 710: Outer casing; 711: Outer pipe; 720: Inner pipe; 730: Piston; 740: Return spring; 751: Throttling orifice; 752: Throttling groove; 760: Drain port; 20: Indoor unit of air conditioner. Detailed Implementation

[0034] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0035] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0036] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0037] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0038] Unless otherwise stated, the term "multiple" means two or more.

[0039] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0040] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0041] The terms "air conditioner outdoor unit," "outdoor unit," and "air conditioner outdoor unit" are different names for the same component, all referring to the outdoor unit of an air conditioner.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0043] When an air conditioner operates in cooling mode under high temperatures, the compressor's suction and discharge temperatures rise, as does the temperature of the control board, leading to cooling interruption. To improve the cooling capacity of air conditioners under high-temperature conditions, a chip heat exchanger and an inverter air conditioner are disclosed in related technologies. The chip heat exchanger includes a capillary tube, an outdoor heat exchanger, an indoor heat exchanger, and a compressor. The first part of the capillary tube is located below the chip on the air conditioner's control board, with one end connected to the indoor heat exchanger and the other end connected to the outdoor heat exchanger. Both the indoor and outdoor heat exchangers are connected to the compressor. By leading the first part of the capillary tube of the refrigerant system to below the chip in the control board, it absorbs heat from the chip, lowering its temperature and solving the problem of insufficient cooling capacity due to poor heat dissipation of the chip on the inverter air conditioner's control board under high-temperature conditions in summer. The problem with this technology is that it can only lower the temperature of the control board and cannot lower the compressor's suction and discharge temperatures. Therefore, the continuous cooling capacity of the air conditioner under high-temperature conditions needs further improvement.

[0044] To further improve the air conditioner's continuous cooling capacity under high-temperature conditions, combined with Figure 1-5 As shown, this embodiment of the present disclosure provides an outdoor unit for an air conditioner, which includes a compressor 200, a condenser 300, a throttling device 400, a cooling pipe 600, and an adaptive injection valve 700. The compressor 200 has an intake port and an exhaust port. The intake end of the condenser 300 is connected to the exhaust port of the compressor 200. The liquid inlet end of the throttling device 400 is connected to the liquid outlet end of the condenser 300. The cooling pipe 600 has one end connected to the liquid outlet end of the condenser 300 and the other end connected to the intake port of the compressor 200. A first portion of the cooling pipe 600 extends to a control board 100 for heat exchange. The adaptive injection valve 700 is located in the cooling pipe 600. The adaptive injection valve 700 opens when the pressure difference between its two ends exceeds a preset value, causing some refrigerant to be throttled and depressurized before returning to the intake port of the compressor 200. The opening degree of the adaptive injection valve 700 is positively correlated with the pressure difference.

[0045] In this embodiment, the outdoor unit of the air conditioner serves as the outdoor portion of the air conditioner. The air conditioner includes a refrigerant circulation system, which comprises a compressor 200, a condenser 300, a throttling device 400, and an evaporator 500 connected in sequence. The compressor 200, condenser 300, and throttling device 400 are located in the outdoor unit of the air conditioner.

[0046] The outdoor unit of the air conditioner provided in this embodiment also includes a cooling pipe 600. The cooling pipe 600 diverts a portion of the refrigerant from the condenser 300, and this portion of the refrigerant returns to the evaporator 500 through the cooling pipe 600.

[0047] An adaptive injection valve 700 is installed in the cooling line 600, creating a high-pressure side and a low-pressure side within the cooling line 600. Under the influence of the pressure difference, the refrigerant flows from the high-pressure side to the low-pressure side. When the refrigerant flows through the adaptive injection valve 700, it is throttled and depressurized, causing the liquid refrigerant to evaporate and absorb heat, becoming a low-pressure gaseous refrigerant. When this low-pressure gaseous refrigerant returns to the compressor 200, it lowers the compressor 200's suction temperature, thereby indirectly lowering the compressor 200's discharge temperature. With both the suction and discharge temperatures of the compressor 200 reduced, the compressor 200 is less likely to shut down due to high temperature. This reduces the likelihood of the air conditioner stopping cooling due to the compressor 200's high-temperature protection shutdown.

[0048] The cooling conduit 600 also serves to reduce the temperature of the circuit board 100. Specifically, the liquid refrigerant flowing from the condenser 300 dissipates heat through the condenser 300, resulting in a lower temperature compared to the circuit board 100. For example, at an ambient temperature of 35 degrees Celsius, the refrigerant temperature at the outlet of the condenser 300 is approximately 45 degrees Celsius, while the circuit board 100 operates at approximately 60 degrees Celsius. Near the circuit board 100, the liquid refrigerant can absorb heat and evaporate, thereby reducing the temperature near the circuit board 100. The gaseous refrigerant formed after throttling and pressure reduction is also at a lower temperature; this portion of the refrigerant flowing through the first part of the cooling conduit 600 also helps to reduce the temperature of the circuit board 100.

[0049] The adaptive injection valve 700 opens when the pressure difference across it exceeds a preset value. This prevents refrigerant from diverting to the cooling line 600 when the compressor 200 temperature is low, thus avoiding a reduction in the system's cooling or heating capacity. Furthermore, the opening degree of the adaptive injection valve 700 is positively correlated with the pressure difference. This allows it to increase the refrigerant flow through the cooling line 600 when the compressor 200 is experiencing difficulty drawing refrigerant, thereby quickly lowering the compressor 200 temperature; conversely, it reduces the refrigerant flow through the cooling line 600 when the compressor 200 is experiencing moderate difficulty drawing refrigerant, thus reducing the reduction in the system's cooling capacity while lowering the compressor 200's suction temperature.

[0050] Using the outdoor unit of the air conditioner provided in this embodiment, the adaptive injection valve 700 can open the cooling pipe 600 when the suction temperature and discharge temperature of the compressor 200 are high, thereby cooling the computer board 100 and the compressor 200, reducing the number of times the air conditioner stops under high temperature conditions, and improving the cooling capacity of the air conditioner under high temperature conditions; the adaptive injection valve 700 adjusts the opening degree according to the suction temperature and discharge temperature of the compressor 200, so that the refrigerant flow of the cooling pipe 600 is adapted to the cooling demand of the compressor 200, thereby improving the continuous cooling capacity of the air conditioner under high temperature conditions while reducing the impact on the cooling or heating capacity of the air conditioner.

[0051] Optionally, in the cooling pipe 600, the refrigerant flows sequentially through the first part of the cooling pipe 600 and the adaptive injection valve, and the refrigerant before being throttled and depressurized by the adaptive injection valve cools the computer board 100.

[0052] Under such circumstances, the cooling of the computer board 100 is mainly accomplished by the liquid refrigerant in the cooling pipe 600.

[0053] With the adaptive injection valve 700 closed, a portion of liquid refrigerant remains in the first section of the cooling pipe 600 because it is connected to the outlet of the evaporator 500. This liquid refrigerant can exchange heat with the control board 100 through the first section of the cooling pipe 600. If the temperature of the control board 100 is low, the refrigerant does not evaporate easily, and the first section of the cooling pipe 600 absorbs less heat. If the temperature of the control board 100 is high, the refrigerant evaporates easily, and the first section of the cooling pipe 600 absorbs more heat.

[0054] With this configuration, when the compressor 200 does not require cooling but the circuit board 100 does, the circuit board 100 can be cooled via the cooling pipe 600. This reduces or eliminates the impact of the refrigerant flow in the cooling pipe 600 on the refrigerant circulation loop's cooling or heating performance while lowering the temperature of the circuit board 100.

[0055] Optionally, the cooling pipeline 600 includes a main pipe and a branch pipe. The two ends of the main pipe are connected to the liquid outlet of the condenser 300 and the air intake of the compressor 200, respectively. One end of the branch pipe is connected to the main pipe and the other end extends to the computer board 100. The height of the computer board 100 is lower than the connection position between the branch pipe and the main pipe.

[0056] The cooling pipe 600 includes a main pipe and branch pipes. Each branch pipe is open at one end and closed at the other, with the open end connecting to the main pipe. At this point, the branch pipe serves as the first part of the cooling pipe 600 extending to the control board 100. Since the height of the control board 100 is lower than the height of the connection points between the branch pipes, the branch pipes form a structure similar to a gravity heat pipe. Specifically, liquid refrigerant is added to the branch pipes under gravity. The liquid refrigerant in the branch pipes evaporates at a location near the control board 100, and the evaporated gaseous refrigerant returns to the main pipe under the influence of the density difference between the liquid and gas phases, entering the refrigerant circulation loop. The mechanism by which gaseous refrigerant returns to the refrigerant circulation loop is as follows: At the connection between the cooling pipe 600 and the condenser 300, due to the smaller refrigerant flow rate in the cooling pipe 600 and the larger flow rate between the condenser 300 and the throttling device 400, the refrigerant in the heat exchange pipe enters the pipe between the heat exchanger and the throttling device 400 under the influence of the pressure difference caused by the difference in flow velocity. Meanwhile, pressure fluctuations occur in the branch pipes of the cooling pipe 600 due to refrigerant evaporation. Under the influence of these pressure fluctuations and the pressure difference caused by the difference in flow velocity, the cooling pipe 600 exchanges refrigerant with the refrigerant pipe between the condenser 300 and the throttling device in a fluctuating or pulsating manner. During this refrigerant exchange process, liquid refrigerant is replenished into the cooling pipe 600, and gaseous refrigerant enters the pipe between the condenser 300 and the throttling device 400.

[0057] This configuration eliminates the need for additional power components, allowing the liquid refrigerant to evaporate and absorb heat near the control board 100. The structure is simple, and the cooling effect is significant. Furthermore, due to the refrigerant's inherent properties, the evaporator 500 only absorbs heat when the control board 100 reaches a higher temperature. This keeps the control board 100 within its normal operating temperature range while mitigating the impact on the main refrigeration system caused by refrigerant distribution.

[0058] Optionally, in the cooling pipe 600, the refrigerant flows sequentially through the adaptive injection valve and the first part of the cooling pipe 600, and the refrigerant after being throttled and depressurized by the adaptive injection valve cools the computer board 100.

[0059] The refrigerant temperature is lower after being throttled and depressurized by the adaptive injection valve, so the cooling effect on the computer board 100 is more direct and efficient when the adaptive injection valve is turned on.

[0060] Furthermore, under low-temperature operating conditions, the circuit board 100 does not easily accumulate heat. However, under high-temperature operating conditions, while the circuit board 100 accumulates heat, the suction and discharge temperatures of the compressor 200 also increase. In other words, the need to cool the compressor 200 and the circuit board 100 usually occur simultaneously. Therefore, using the depressurized refrigerant to cool the circuit board 100 eliminates the need for additional judgment regarding its cooling, simplifying the air conditioner's control logic and further improving its continuous cooling capacity in high-temperature environments.

[0061] Optionally, the adaptive injection valve 700 includes a housing 710, an inner tube 720, a piston 730, and a return spring 740. The housing 710 has a refrigerant outlet. The inner tube 720 is disposed within the housing 710, with its inner wall defining a first channel and its outer wall and the inner wall of the housing 710 jointly defining a second channel. A throttling orifice is provided on the side wall of the inner tube 720, connecting the first and second channels. The inner tube 720 also has a refrigerant inlet. The piston 730 is slidably disposed within the inner tube 720 and slidably sealed against its inner wall. When the piston 730 slides, it adjusts the opening of the throttling orifice. The return spring 740 is disposed within the inner tube 720 and elastically connected to the side of the piston 730 facing away from the refrigerant inlet. In its initial state, the return spring 740 keeps the piston 730 in a position that blocks the throttling orifice.

[0062] The refrigerant inlet of the inner tube 720 and the refrigerant outlet of the outer shell 710 serve as the two ends of the adaptive injection valve 700. The inner tube 720 is inserted into the outer shell 710, forming a second channel between the inner tube 720 and the outer shell 710, with the interior of the inner tube 720 serving as the first channel. A throttling orifice is provided on the side wall of the inner tube 720, and the piston 730 slides along the axial direction of the inner tube 720. When the piston 730 is located at the first section of the inner tube 720, the connection between the first and second channels is cut off, and the adaptive injection valve 700 is in the closed state. When the valve core is located at the second section of the inner tube 720, it avoids at least a portion of the throttling orifice, thereby allowing the first and second channels to connect through the throttling orifice. The refrigerant entering the inner tube 720 enters the second channel through the throttling orifice and is throttled and depressurized when passing through the throttling orifice, at which point the adaptive injection valve 700 is in the open and throttling state.

[0063] The refrigerant inlet pressure of the adaptive injection valve 700 is affected by the condenser 300 pressure, and indirectly by the compressor 200 discharge pressure. The refrigerant outlet pressure of the adaptive injection valve 700 is affected by the pressure of the second channel, and indirectly by the compressor 200 suction pressure. Thus, when both the compressor 200 suction and discharge temperatures are high and the suction-discharge pressure difference is large, the adaptive injection valve 700 opens, inputting some low-temperature gaseous refrigerant into the compressor 200, reducing the compressor 200 temperature and decreasing the suction-discharge pressure difference. When the compressor 200 suction-discharge pressure difference is within the normal range, the adaptive injection valve 700 closes, thereby mitigating or avoiding the impact on the heating or cooling of the refrigerant circulation loop caused by refrigerant diversion in the cooling pipe 600.

[0064] Furthermore, the adaptive injection valve 700 is reset by the return spring 740, which allows the adaptive injection valve 700 to be better maintained in its initial state.

[0065] Optionally, the outer casing 710 includes an outer tube 711.

[0066] The inner and outer tubes are connected in a sleeved configuration, which simplifies the structure of the adaptive injection valve 700 and facilitates its installation.

[0067] Optionally, the throttling channel includes a plurality of throttling orifices 751, which are spaced apart along the axial direction of the inner tube 720. The number of throttling orifices 751 in the conducting state is positively correlated with the pressure difference across the adaptive injection valve 700.

[0068] To adjust the throttling resistance of the adaptive injection valve 700, as one implementation, the throttling channel includes a plurality of throttling orifices 751 spaced axially along the inner tube 720. The inner tube 720 includes a first end and a second end opposite to each other, with a refrigerant inlet at the first end. As the pressure difference between the compressor 200's suction and discharge increases, the piston 730 overcomes the spring force and moves towards the second end of the inner tube 720. The greater the pressure difference between the compressor 200's suction and discharge, the greater the distance the piston 730 moves towards the second end of the inner tube 720, thus avoiding more throttling orifices 751. With an increased number of open throttling orifices 751, the refrigerant flow rate in the cooling line 600 increases, and more refrigerant returns to the compressor 200 through the cooling line 600, thereby rapidly reducing the temperature of the compressor 200.

[0069] This configuration allows for step-by-step adjustment of the throttling resistance of the adaptive injection valve 700 and the refrigerant flow rate of the cooling pipe 600, reducing pressure fluctuations in the refrigerant circulation system.

[0070] Optionally, the diameter of the plurality of throttling orifices 751 gradually decreases from the first end of the inner tube 720 to the second end of the inner tube 720.

[0071] In this way, the amount of refrigerant entering the heat exchange pipeline is no longer directly proportional to the pressure difference between the compressor 200's suction and discharge. As the pressure difference between the compressor 200's suction and discharge increases, the proportion of increase in the adaptive injection valve 700 gradually decreases. It takes a certain amount of time for the suction and discharge pressure of the compressor 200 to be transmitted to both ends of the adaptive injection valve 700. If the opening of the adaptive injection valve 700 changes significantly, it can easily lead to pressure fluctuations in the compressor and cause the adaptive injection valve 700 to repeatedly open and close. The diameter of the multiple throttling orifices 751 gradually decreases from the first end to the second end of the inner tube 720, which can prevent the adaptive injection valve 700 from opening too large, causing refrigerant to flow in a gas-like manner in the heat exchange pipeline, thus improving the smoothness of refrigerant flow in the refrigerant circulation system.

[0072] Optionally, multiple throttling orifices 751 are located on multiple radial lines of the inner tube 720.

[0073] With multiple throttling orifices 751 open, gaseous refrigerant can be injected in multiple directions through these orifices. This reduces the vibration and operating noise of the adaptive injection valve 700.

[0074] Optionally, the throttling channel includes a throttling groove 752. The dimension of the throttling groove 752 along the axial direction of the inner tube 720 is the length of the throttling groove 752, and the dimension of the throttling groove 752 along the circumferential direction of the inner tube 720 is the width of the throttling groove 752. The length of the throttling groove 752 is greater than the width of the throttling groove 752. When the piston 730 slides continuously, the opening of the throttling groove 752 is continuously changed.

[0075] The throttling channel includes a throttling groove 752, allowing the opening of the throttling groove 752 to be continuously adjusted. This configuration helps the compressor 200 establish a stable suction and discharge pressure difference, and ensures that the refrigerant flow rate in the heat exchange path matches the amount of refrigerant required for cooling by the compressor 200.

[0076] Optionally, the width of the throttling groove 752 gradually decreases from the first end of the inner tube 720 to the second end of the inner tube 720.

[0077] In this way, in the initial stage before the pressure difference between the compressor 200's suction and discharge increases, the flow rate of the adaptive injection valve 700 can increase, but the rate of increase gradually decreases. That is, as the pressure difference between the compressor 200's suction and discharge increases, the opening adjustment of the adaptive injection valve becomes more precise. This allows for a better match between the cooling capacity required by the compressor 200 and the opening of the adaptive injection valve 700.

[0078] Optionally, the throttling groove 752 is spiral-shaped.

[0079] The spiral-shaped throttling groove 752 can spray gaseous refrigerant at multiple angles when the throttling groove 752 is open, thereby reducing the vibration of the adaptive injection valve 700 and reducing the operating noise of the adaptive injection valve 700.

[0080] Optionally, the inner tube 720 is divided into a first section and a second section, with the throttling channel opened in the first section, and the second section of the inner tube 720 connected to the second channel or the suction of the compressor 200.

[0081] With the second end of the inner tube 720 closed, when the piston 730 moves to a position close to the second end of the inner tube 720, a relatively enclosed area is formed between the second end of the inner tube 720 and the piston 730. This area contains gaseous refrigerant, restricting further downward movement. Under higher pressure, the gaseous refrigerant in this area will become liquid, further restricting the piston 730 from returning to its original position under the action of the return spring 740. Therefore, if the pressure in this area is not controlled, the movement of the piston 730 will become uncontrollable.

[0082] In the air conditioner outdoor unit provided in this embodiment, the second end of the inner pipe 720 is not closed, but is connected to the second channel or the suction of the compressor 200. In this way, the movement of the piston 730 is not affected by the two-phase change of the refrigerant gas and liquid, and the movement is clear, which is conducive to the air conditioner outdoor unit accurately controlling the refrigerant flow of the cooling pipe 600.

[0083] Optionally, the interval between the piston 730 and the first end of the inner tube 720 is designated as the first region, and the interval between the piston 730 and the second end of the inner tube 720 is designated as the second region. During the sliding process, the piston 730 always isolates the second region from the throttling channel.

[0084] In one implementation, the length of piston 730 is L1, the length of the throttling orifice is L2, and the moving distance of piston 730 is L3. The three satisfy the following relationship:

[0085] L1 > L2 + L3;

[0086] Thus, when piston 730 moves upward, it blocks the throttling orifice, and the first region is not connected to the second channel, nor is the second region connected to the second channel. When piston 730 moves downward, it opens at least a portion of the throttling orifice, and the first region is connected to the second channel through the throttling orifice, while the second region is not connected to the second channel.

[0087] This can reduce or avoid the second channel of the inner tube 720 being partially connected to the second channel through the throttling orifice, thus reducing the occurrence of the piston 730 being unable to move in a controlled manner due to the influence of the refrigerant.

[0088] The second section of the inner tube 720 can be connected to the second channel, but not through a small orifice with a throttling effect. This allows the piston 730 to be fully driven by the suction and discharge pressure difference of the compressor 200 on both sides, and reduces or avoids the impact on the piston 730's movement when the refrigerant in the second section of the inner tube 720 cannot be discharged.

[0089] Optionally, the second section of the inner pipe 720 is provided with a drain port 760 to discharge liquid refrigerant.

[0090] On the one hand, the pressure of the second section of the inner pipe 720 can be kept consistent with that of the second channel. On the other hand, this arrangement can also prevent liquid refrigerant from accumulating in the second section.

[0091] For example, the drain port 760 is located at the bottom of the inner tube 720.

[0092] Combination Figure 1-5 As shown, this embodiment of the present disclosure provides an air conditioner, which includes an indoor unit 20 and the aforementioned outdoor unit 10. The indoor unit 20 is provided with an evaporator 500, the liquid inlet of the evaporator 500 is connected to the liquid outlet of the throttling device 400, and the gas outlet of the evaporator 500 is connected to the suction end of the compressor 200.

[0093] The air conditioner provided in this embodiment includes the aforementioned outdoor unit and therefore has the same technical effects as the aforementioned outdoor unit, which will not be repeated here.

[0094] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An air conditioner outdoor unit characterized by comprising: The air conditioner outdoor unit comprises: a compressor, which is provided with a suction port and a discharge port; a condenser, which is connected to the discharge port of the compressor; a throttling device, which is connected to the outlet of the condenser; a cooling pipeline, which is connected to the outlet of the condenser at one end and to the suction port of the compressor at the other end, and a first part of the cooling pipeline extends to the computer board to exchange heat with the computer board; an adaptive injection valve, which is arranged in the cooling pipeline, and the adaptive injection valve is opened when the pressure difference between the two ends exceeds a preset value to make part of the refrigerant throttled and depressurized and then returned to the suction port of the compressor, and the opening degree of the adaptive injection valve is positively correlated with the pressure difference between the two ends.

2. The air conditioner outdoor unit according to claim 1, wherein in the cooling pipeline, the refrigerant sequentially flows through the first part of the cooling pipeline and the adaptive injection valve, and the refrigerant before being throttled and depressurized by the adaptive injection valve cools the computer board.

3. The air conditioner outdoor unit according to claim 2, wherein the cooling pipeline comprises a main pipe and a branch pipe, the two ends of the main pipe are respectively connected to the outlet of the condenser and the suction port of the compressor, one end of the branch pipe is connected to the main pipe and the other end extends to the computer board, and the height of the computer board is lower than the connection position of the branch pipe and the main pipe.

4. The air conditioner outdoor unit according to claim 1, wherein in the cooling pipeline, the refrigerant sequentially flows through the adaptive injection valve and the first part of the cooling pipeline, and the refrigerant after being throttled and depressurized by the adaptive injection valve cools the computer board.

5. The air conditioner outdoor unit according to any one of claims 1 to 4, characterized by The adaptive injection valve comprises: an outer shell, which is provided with a refrigerant outlet; an inner pipe, which is arranged in the outer shell, the inner wall of the inner pipe defines a first channel, the outer wall of the inner pipe and the inner wall of the outer shell jointly define a second channel, the side wall of the inner pipe is provided with a throttling hole, the throttling hole is connected to the first channel and the second channel, and the inner pipe is provided with a refrigerant inlet; a piston, which is slidingly arranged in the inner pipe and slidingly sealed with the inner wall of the inner pipe, and the opening degree of the throttling hole is adjusted when the piston slides; a reset spring, which is arranged in the inner pipe and elastically connected to one side of the piston away from the refrigerant inlet, and the reset spring makes the piston be in a position of blocking the throttling hole in an initial state.

6. The air conditioner outdoor unit according to claim 5, wherein the throttling hole comprises a plurality of throttling holes, the plurality of throttling holes are arranged in the axial direction of the inner pipe, and the number of throttling holes in the open state is positively correlated with the pressure difference between the two ends of the adaptive injection valve.

7. The air conditioner outdoor unit according to claim 6, wherein the diameters of the plurality of throttling holes gradually decrease from the first end of the inner pipe to the second end of the inner pipe; and / or the plurality of throttling holes are located on a plurality of radial lines of the inner pipe.

8. The air conditioner outdoor unit according to claim 5, wherein the throttling hole comprises a throttling groove, the size of the throttling groove in the axial direction of the inner pipe is the length of the throttling groove, the size of the throttling groove in the circumferential direction of the inner pipe is the width of the throttling groove, the length of the throttling groove is greater than the width of the throttling groove, and the opening degree of the throttling groove is continuously changed when the piston continuously slides. 9.The outdoor unit of air conditioner according to claim 8, wherein, a width of the throttle groove gradually decreases from the first end of the inner tube to the second end of the inner tube; and / or, the throttle groove is in a spiral shape. 10.The outdoor unit of air conditioner according to claim 5, wherein, the inner tube is divided into a first tube segment and a second tube segment, the throttle passage is formed in the first tube segment, and the second tube segment of the inner tube is in communication with the second passage or with a suction port of the compressor. 11.The outdoor unit of air conditioner according to claim 10, wherein, the second tube segment of the inner tube is provided with a liquid discharge port to discharge liquid refrigerant. 12.An air conditioner, comprising: the outdoor unit of air conditioner according to any one of claims 1 to 11; and an indoor unit of air conditioner, provided with an evaporator, a liquid inlet end of the evaporator being in communication with a liquid outlet end of the throttling device, and a gas outlet end of the evaporator being in communication with a suction end of the compressor. ​

Images