Refrigerating system and air conditioner
By introducing shovel wing auxiliary heat exchanger into the air-conditioning refrigeration system, the problem of unsatisfactory cooling effect in high ring temperature environments is solved, and more efficient heat exchange and cooling effects are achieved, improving the user experience.
Patent Information
- Application Number
- CN202421074628.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-16
Smart Images
Figure CN222459665U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of refrigeration systems, and in particular to a refrigeration system and an air conditioner. Background Art
[0002] At present, when the outdoor unit of the air conditioner is in a high ambient temperature, the heat exchange effect of the outdoor heat exchanger will deteriorate, which will lead to a deterioration in the cooling effect of the air conditioner in a high temperature environment. The deterioration of the cooling effect of the air conditioner in a high outdoor temperature environment is mainly reflected in two aspects: the cooling capacity remains unchanged, but the temperature of the indoor unit outlet becomes higher, and the indoor unit outlet temperature remains unchanged, but the cooling capacity decreases, which affects the user experience.
[0003] There is a refrigeration system in the related technology, including a compressor, a condenser, a subcooler, a first evaporator and a second evaporator connected in sequence to form a refrigerant circulation loop; the subcooler includes a first branch and a second branch, the refrigerant in the first branch absorbs the heat of the refrigerant in the second branch in the subcooler, the inlet of the first evaporator is connected to the outlet of the condenser through the first branch, and the inlet of the first branch is provided with a first throttling device, and the inlet of the second evaporator is connected to the outlet of the condenser through the second branch; a first gas-liquid separator is provided between the first branch and the first evaporator, wherein the gas outlet of the first gas-liquid separator is connected to the compressor, and the liquid outlet of the first gas-liquid separator is connected to the inlet of the first evaporator.
[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:
[0005] Of the two evaporators arranged side by side, the evaporator located on the leeward side has a poor heat exchange effect with the heat exchange airflow, the cooling effect of the refrigeration system is still not ideal, and the user experience is not good.
[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content
[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.
[0008] The embodiments of the present disclosure provide a refrigeration system and an air conditioner to increase the heat exchange efficiency of the indoor side under refrigeration conditions, thereby improving the refrigeration effect of the refrigeration system and improving the user experience.
[0009] In some embodiments, a refrigeration system includes: an indoor heat exchanger, an outdoor heat exchanger, a compressor, and a shovel-fin auxiliary heat exchanger. The shovel-fin auxiliary heat exchanger is arranged on the leeward side of the indoor heat exchanger; wherein the indoor heat exchanger and the shovel-fin auxiliary heat exchanger are connected in parallel between a port of the outdoor heat exchanger and a port of the compressor.
[0010] Optionally, the shovel-fin auxiliary heat exchanger comprises: a heat exchange flat tube and a shovel fin. The heat exchange flat tube is connected in parallel with the indoor heat exchanger between the port of the outdoor heat exchanger and the port of the compressor; a plurality of shovel fins are provided, and the plurality of shovel fins are evenly arranged on the outside of the heat exchange flat tube, and the ends of the plurality of shovel fins are connected to the outer side wall of the heat exchange flat tube.
[0011] Optionally, the heat exchange flat tubes and the shovel fins are an integrally formed structure.
[0012] Optionally, a plurality of refrigerant flow channels are provided inside the heat exchange flat tubes, and the flow area of each refrigerant flow channel is greater than or equal to one third of the total flow area of the heat exchange flat tubes.
[0013] Optionally, a plurality of heat exchange internal teeth are provided on the inner walls on two opposite sides of each refrigerant flow channel, and the plurality of heat exchange internal teeth provided on the inner walls on two opposite sides of the refrigerant flow channel are symmetrical structures.
[0014] Optionally, a plurality of heat exchange internal teeth are provided on the inner walls on two opposite sides of each refrigerant flow channel, and the plurality of heat exchange internal teeth provided on the inner walls on two opposite sides of the refrigerant flow channel are asymmetric structures with respect to each other.
[0015] Optionally, the refrigeration system further includes: a heat exchange fan. The heat exchange fan is arranged on the windward side of the indoor heat exchanger.
[0016] Optionally, the refrigeration system further includes: a controller. The controller is used to obtain the operating frequency of the compressor.
[0017] Optionally, the refrigeration system further includes: a temperature sensor. The temperature sensor is arranged in an outdoor unit where the outdoor heat exchanger is located, and is used to detect the ambient temperature of the outdoor unit.
[0018] In some embodiments, an air conditioner comprises: a refrigeration system of any of the above embodiments.
[0019] The refrigeration system and air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:
[0020] By setting up the indoor heat exchanger and the shovel-fin auxiliary heat exchanger in parallel, when the refrigeration system is operating in the refrigeration condition, the indoor heat exchanger and the shovel-fin auxiliary heat exchanger are both used as evaporators, and the heat exchange airflow flows through the indoor heat exchanger and the shovel-fin auxiliary heat exchanger in turn for heat exchange. Since the shovel-fin auxiliary heat exchanger has a higher heat exchange efficiency, the heat exchange efficiency of the indoor side under the refrigeration condition is increased, the refrigeration effect of the refrigeration system is improved, and the user experience is improved.
[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:
[0023] Figure 1 is a structural schematic diagram of a refrigeration system provided by an embodiment of the present disclosure;
[0024] Figure 2 is a schematic structural diagram of a shovel-fin auxiliary heat exchanger provided in an embodiment of the present disclosure;
[0025] Figure 3 is a structural schematic diagram of another shovel-fin auxiliary heat exchanger provided in an embodiment of the present disclosure;
[0026] Figure 4 is a cross-sectional schematic diagram of a heat exchange flat tube provided in an embodiment of the present disclosure;
[0027] Figure 5 is a cross-sectional schematic diagram of another heat exchange flat tube provided in an embodiment of the present disclosure;
[0028] Figure 6 It is a structural schematic diagram of another refrigeration system provided in an embodiment of the present disclosure.
[0029] Reference numerals:
[0030] 100, indoor heat exchanger; 200, outdoor heat exchanger; 300, compressor; 400, shovel-fin auxiliary heat exchanger; 410, heat exchange flat tube; 411, refrigerant flow channel; 412, heat exchange inner teeth; 420, shovel fins; 500, diverter pipe; 510, main pipe; 520, first branch pipe; 530, second branch pipe; 600, first throttling element; 700, second throttling element; 800, heat exchange fan; 900, controller; 910, temperature sensor. DETAILED DESCRIPTION
[0031] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.
[0032] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.
[0033] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.
[0034] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" 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, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.
[0035] Unless otherwise stated, the term "plurality" means two or more.
[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.
[0037] Combination Figure 1-6As shown, in some embodiments, the refrigeration system includes: an indoor heat exchanger 100, an outdoor heat exchanger 200, a compressor 300, and a shovel-fin type auxiliary heat exchanger 400. The shovel-fin type auxiliary heat exchanger 400 is arranged on the leeward side of the indoor heat exchanger 100; wherein the indoor heat exchanger 100 and the shovel-fin type auxiliary heat exchanger 400 are connected in parallel between the port of the outdoor heat exchanger 200 and the port of the compressor 300.
[0038] The refrigeration system provided by the embodiment of the present disclosure is provided with an indoor heat exchanger 100 and a shovel-fin type auxiliary heat exchanger 400 connected in parallel. When the refrigeration system is operated in a refrigeration condition, the indoor heat exchanger 100 and the shovel-fin type auxiliary heat exchanger 400 are both used as evaporators, and the heat exchange airflow flows through the indoor heat exchanger 100 and the shovel-fin type auxiliary heat exchanger 400 in sequence for heat exchange. Since the heat exchange efficiency of the shovel-fin type auxiliary heat exchanger 400 is higher, the heat exchange efficiency of the indoor side under the refrigeration condition is increased, the refrigeration effect of the refrigeration system is improved, and the user experience is improved.
[0039] Optionally, the port of the outdoor heat exchanger 200 is respectively connected to the indoor heat exchanger 100 and the shovel-fin auxiliary heat exchanger 400 through the shunt pipe 500. In this way, the refrigerant flowing out of the outdoor heat exchanger 200 can flow to the indoor heat exchanger 100 and the shovel-fin auxiliary heat exchanger 400 more evenly through the shunt pipe 500, and the heat exchange airflow flows through the indoor heat exchanger 100 and the shovel-fin auxiliary heat exchanger 400 in sequence for heat exchange, thereby improving the refrigeration effect of the refrigeration system.
[0040] Optionally, the flow divider 500 includes: a main line 510, a first branch pipe 520, and a second branch pipe 530. One end of the main line 510 is connected to the port of the outdoor heat exchanger 200, and the other end of the main line 510 is respectively connected to one end of the first branch pipe 520 and one end of the second branch pipe 530, wherein the other end of the first branch pipe 520 is connected to the port of the indoor heat exchanger 100, and the other end of the second branch pipe 530 is connected to the port of the shovel-fin type auxiliary heat exchanger 400. In this way, the refrigerant flowing out of the outdoor heat exchanger 200 first flows into the main line 510, and then flows into the first branch pipe 520 and the second branch pipe 530 respectively through the main line 510, and then flows to the indoor heat exchanger 100 and the shovel-fin type auxiliary heat exchanger 400 respectively through the first branch pipe 520 and the second branch pipe 530.
[0041] Optionally, the main line 510 is connected to a first throttling element 600. Thus, the refrigerant flowing in the main line 510 is throttled and depressurized by the first throttling element 600 and then flows into the first branch pipe 520 and the second branch pipe 530 respectively, and then flows into the indoor heat exchanger 100 and the shovel-fin auxiliary heat exchanger 400 respectively to evaporate and absorb heat.
[0042] Optionally, the second branch pipe 530 is connected to a second throttling element 700. In this way, since the second branch pipe 530 is connected to the shovel-fin type auxiliary heat exchanger 400, the refrigerant flowing in the second branch pipe 530 is throttled and depressurized again by the second throttling element 700, and the temperature of the refrigerant flowing into the shovel-fin type auxiliary heat exchanger 400 is further controlled, so that the refrigerant in the shovel-fin type auxiliary heat exchanger 400 evaporates and absorbs heat more efficiently, thereby improving the heat exchange effect between the shovel-fin type auxiliary heat exchanger 400 and the heat exchange airflow, and improving the refrigeration effect of the refrigeration system.
[0043] Specifically, the compressor 300 has an output port and an input port, one of which is communicated with the indoor heat exchanger 100 and the shovel-fin auxiliary heat exchanger 400 , and the other is communicated with the outdoor heat exchanger 200 .
[0044] Exemplarily, when the indoor heat exchanger 100 operates in a cooling condition, the output port of the compressor 300 is connected to the outdoor heat exchanger 200, and the input port of the compressor 300 is respectively connected to the indoor heat exchanger 100 and the shovel-fin auxiliary heat exchanger 400, and the indoor heat exchanger 100 and the shovel-fin auxiliary heat exchanger 400 are arranged side by side between the output port of the outdoor heat exchanger 200 and the input port of the compressor 300. The high-temperature and high-pressure gaseous refrigerant in the compressor 300 flows from the output port into the outdoor heat exchanger 200 to condense and release heat, and then flows through the shunt pipe 500 into the indoor heat exchanger 100 and the shovel-fin auxiliary heat exchanger 400 to evaporate and absorb heat, thereby cooling the indoor environment.
[0045] Alternatively, if Figure 2 As shown, the shovel-fin auxiliary heat exchanger 400 includes: a heat exchange flat tube 410 and a shovel fin 420. The heat exchange flat tube 410 is connected in parallel with the indoor heat exchanger 100 between the port of the outdoor heat exchanger 200 and the port of the compressor 300; there are multiple shovel fins 420, and the multiple shovel fins 420 are evenly arranged on the outside of the heat exchange flat tube 410, and the ends of the multiple shovel fins 420 are connected to the outer wall of the heat exchange flat tube 410. In this way, the shovel-fin auxiliary heat exchanger 400 is composed of the heat exchange flat tube 410 and the multiple shovel fins 420, and the refrigerant can evaporate and absorb heat more efficiently when circulating in the heat exchange flat tube 410. By arranging multiple shovel fins 420 on the outside of the heat exchange flat tube 410, the heat exchange area with the heat exchange air flow is increased, thereby improving the heat exchange efficiency of the shovel-fin auxiliary heat exchanger 400, and then increasing the heat exchange efficiency of the indoor side under the refrigeration condition, even if the outdoor side is in a high temperature environment, the refrigeration effect of the refrigeration system is still good.
[0046] Optionally, a flow gap is defined between adjacent scooping fins 420. In this way, the heat exchange airflow flows through the flow gap, increasing the heat exchange area with the scooping fins 420, thereby increasing the heat exchange effect of the heat exchange airflow. In addition, the scooping fins 420 that are not in contact with each other have a better drainage effect, and the condensed water generated on the scooping fins 420 and the heat exchange flat tubes 410 can be efficiently discharged.
[0047] Optionally, the heat exchange flat tube 410 is a rectangular plate-shaped structure, and a plurality of scooping fins 420 are provided on opposite side walls of the heat exchange flat tube 410. In this way, the heat exchange area between the plurality of scooping fins 420 and the heat exchange flat tube 410 can be increased, so that the refrigerant flowing in the heat exchange flat tube 410 can better exchange heat with the heat exchange airflow through the scooping fins 420.
[0048] Optionally, a plurality of scooping fins 420 are provided on both the upper side wall and the lower side wall of the heat exchange flat tube 410 .
[0049] Optionally, the number of scooping fins 420 provided on the two opposite side walls of the heat exchange flat tube 410 is the same, and the multiple scooping fins 420 provided on the two opposite side walls of the heat exchange flat tube 410 are arranged along the length direction of the heat exchange flat tube 410. In this way, the overall heat exchange uniformity of the heat exchange flat tube 410 is higher, and the heat exchange effect is improved.
[0050] Alternatively, if Figure 3 As shown, the shovel-fin auxiliary heat exchanger 400 includes a plurality of heat exchange flat tubes 410, which are arranged side by side. The liquid outlet end of one heat exchange flat tube 410 of adjacent heat exchange flat tubes 410 is connected to the liquid inlet end of another heat exchange flat tube 410 through a heat exchange elbow. The structure of each heat exchange flat tube 410 is the same, and a plurality of shovel fins 420 are arranged on the upper and lower side walls of each heat exchange flat tube 410 for heat exchange. In this way, by arranging a plurality of heat exchange flat tubes 410 side by side and connecting adjacent heat exchange flat tubes 410 by using a heat exchange elbow to form a curved refrigerant flow path, the flow path of the refrigerant can be extended, the heat exchange time of the refrigerant can be increased, and the heat exchange efficiency of the shovel-fin auxiliary heat exchanger 400 can be improved.
[0051] Optionally, the heat exchange flat tube 410 and the scoop fin 420 are an integrally formed structure. In this way, the heat transfer resistance between the scoop fin 420 and the heat exchange flat tube 410 can be reduced, and the heat conduction efficiency between the heat exchange flat tube 410 and the scoop fin 420 is higher, thereby further improving the heat exchange efficiency of the scoop fin auxiliary heat exchanger 400 and improving the refrigeration effect of the refrigeration system.
[0052] Specifically, each scooping fin 420 is an arc-shaped sheet structure, and each scooping fin 420 has a curved arc in the direction away from the heat exchange flat tube 410. In this way, the multiple scooping fins 420 can have a relatively large heat exchange area while occupying a relatively small space. While ensuring the heat exchange area of the scooping fin auxiliary heat exchanger 400, the volume of the scooping fin auxiliary heat exchanger 400 is reduced.
[0053] It can be understood that the curvature of each scooping fin 420 is the same, and the multiple scooping fins 420 on both sides of the heat exchange flat tube 410 are bent toward the same side.
[0054] Optionally, the refrigeration system also includes: a heat exchange fan 800. The heat exchange fan 800 is arranged on the windward side of the indoor heat exchanger 100. In this way, the operation of the heat exchange fan 800 causes the heat exchange airflow to continuously blow toward the indoor heat exchanger 100 and the shovel-fin type auxiliary heat exchanger 400 for heat exchange. Since the heat exchange performance of the indoor heat exchanger 100 is worse than that of the shovel-fin type auxiliary heat exchanger 400, the heat exchange fan 800 is arranged on the windward side of the indoor heat exchanger 100, so that the heat exchange airflow first flows through the indoor heat exchanger 100 for heat exchange and then flows through the shovel-fin type auxiliary heat exchanger 400 for heat exchange, thereby ensuring the cooling temperature of the heat exchange airflow and thus ensuring the cooling effect of the indoor side.
[0055] Specifically, the indoor heat exchanger 100 and the shovel-fin auxiliary heat exchanger 400 are sequentially arranged along the flow direction of the heat exchange airflow, and the shovel-fin auxiliary heat exchanger 400 is located at the air outlet side of the indoor heat exchanger 100. In this way, the heat exchange airflow exchanges heat with the indoor heat exchanger 100 and then flows to the shovel-fin auxiliary heat exchanger 400 for heat exchange, so that the temperature of the heat exchange airflow is further reduced, thereby ensuring the cooling effect of the indoor side.
[0056] Combination Figure 4 or Figure 5 As shown, in one embodiment, a plurality of refrigerant flow channels 411 are provided inside the heat exchange flat tube 410, and the flow area of each refrigerant flow channel 411 is greater than or equal to one third of the total flow area of the heat exchange flat tube 410. In this way, by providing a plurality of refrigerant flow channels 411 inside the heat exchange flat tube 410 for the refrigerant to circulate, the heat exchange effect is improved. In order to reduce the pressure drop of the refrigerant circulating in each refrigerant flow channel 411, the flow area of each refrigerant flow channel 411 is set to be greater than or equal to one third of the total flow area of the heat exchange flat tube 410, which can increase the flow area of each refrigerant flow channel 411, reduce the pressure drop of the refrigerant during the circulation process, and improve the heat exchange effect of the heat exchange flat tube 410.
[0057] Optionally, three refrigerant flow channels 411 are provided inside the heat exchange flat tube 410, and the flow area of each refrigerant flow channel 411 is equal to one third of the total flow area of the heat exchange flat tube 410. In this way, the heat exchange flat tube 410 can have multiple refrigerant flow channels 411 for the circulation of refrigerant for heat exchange, and the pressure drop of the refrigerant during the circulation process can be reduced, thereby improving the heat exchange effect of the heat exchange flat tube 410.
[0058] Combination Figure 4 As shown, in one embodiment, a plurality of heat exchange inner teeth 412 are provided on the inner walls on both sides of each refrigerant flow channel 411, and the plurality of heat exchange inner teeth 412 provided on the inner walls on both sides of the refrigerant flow channel 411 are mutually symmetrical structures. In this way, since the circulation area of the refrigerant flow channel 411 is relatively large, the refrigerant is very likely to form a liquid film on the inner wall of the refrigerant flow channel 411 during the circulation process, hindering the heat exchange between the refrigerant and the inner wall of the refrigerant flow channel 411. Therefore, a plurality of symmetrical heat exchange inner teeth 412 are provided on the inner walls on both sides of each refrigerant flow channel 411 to form a turbulent flow for the refrigerant flowing in the inner wall area of the refrigerant flow channel 411, so that the distribution of the refrigerant inside the refrigerant flow channel 411 is more uniform, the turbulence of the refrigerant on the inner wall of the refrigerant flow channel 411 is increased, and the heat exchange coefficient between the refrigerant and the inner wall of the refrigerant flow channel 411 is increased, thereby improving the heat exchange efficiency.
[0059] Optionally, the upper inner wall and the lower inner wall of each refrigerant flow channel 411 are provided with a plurality of heat exchange inner teeth 412, and the number of heat exchange inner teeth 412 provided on the upper inner wall and the lower inner wall of each refrigerant flow channel 411 is the same. In this way, since the area of the upper inner wall and the lower inner wall of the refrigerant flow channel 411 is relatively large, and the upper inner wall and the lower inner wall of the refrigerant flow channel 411 directly exchange heat with the shovel fin 420, in order to prevent the refrigerant from easily forming a liquid film on the upper inner wall and the lower inner wall of the refrigerant flow channel 411 during the circulation process, thereby hindering the heat exchange between the refrigerant and the inner wall of the refrigerant flow channel 411, the same number of heat exchange inner teeth 412 are provided on the upper inner wall and the lower inner wall of each refrigerant flow channel 411 to improve the heat exchange efficiency.
[0060] Optionally, along the vertical direction, the length of each heat exchange inner tooth 412 is greater than one quarter of the depth of the coolant flow channel 411, and less than or equal to one third of the depth of the coolant flow channel 411. In this way, when the length of the heat exchange inner tooth 412 is less than or equal to one quarter of the depth of the coolant flow channel 411, the length of the heat exchange inner tooth 412 is relatively small, and the effect of disturbing the coolant flow is not obvious, resulting in a decrease in the heat exchange coefficient between the coolant and the inner wall of the coolant flow channel 411. When the length of the heat exchange inner tooth 412 is greater than one third of the depth of the coolant flow channel 411, the length of the heat exchange inner tooth 412 is relatively large, which will occupy too much circulation space inside the coolant flow channel 411, thereby increasing the pressure drop of the coolant. Therefore, the length of each heat exchange inner tooth 412 is set to be greater than one quarter of the depth of the refrigerant flow channel 411 and less than or equal to one third of the depth of the refrigerant flow channel 411. This can not only ensure the turbulence effect of the heat exchange inner teeth 412, but also reduce the occupation of the flow area in the refrigerant flow channel 411 by the heat exchange inner teeth 412, thereby reducing the pressure drop of the refrigerant.
[0061] Specifically, along the vertical direction, the length of each heat exchange inner tooth 412 is equal to one third of the depth of the coolant flow channel 411. In this way, the heat exchange inner teeth 412 arranged on the upper inner wall of the coolant flow channel 411 and the heat exchange inner teeth 412 arranged on the lower inner wall occupy one third of the upper area and one third of the lower area of the coolant flow channel 411 respectively, which can not only ensure the turbulence effect of the heat exchange inner teeth 412, but also reduce the occupation of the heat exchange inner teeth 412 on the flow area in the coolant flow channel 411, thereby reducing the pressure drop of the coolant.
[0062] Combination Figure 5 As shown, in another embodiment, a plurality of heat exchange internal teeth 412 are provided on the inner walls on both sides of each refrigerant flow channel 411, and the plurality of heat exchange internal teeth 412 provided on the inner walls on both sides of the refrigerant flow channel 411 are mutually asymmetric structures. In this way, although the flow area of each refrigerant flow channel 411 is increased compared with the traditional microchannel heat exchanger, a plurality of heat exchange internal teeth 412 are provided on the upper inner wall and the lower inner wall of each refrigerant flow channel 411, forming a turbulent flow for the refrigerant flowing in the refrigerant flow channel 411. Due to the asymmetrical distribution of multiple heat exchange inner teeth 412 on the upper inner wall and the lower inner wall of each refrigerant flow channel 411, the refrigerant flowing in the refrigerant flow channel 411 is further disturbed, and the disturbance effect on the refrigerant is further increased. The disturbance effect of the refrigerant in the upper and lower areas of the refrigerant flow channel 411 is improved, and the distribution of the refrigerant in the entire cavity of the refrigerant flow channel 411 is made more uniform, further increasing the turbulence of the refrigerant on the inner wall of the refrigerant flow channel 411, thereby improving the heat exchange coefficient between the refrigerant and the inner wall of the refrigerant flow channel 411, thereby improving the heat exchange efficiency.
[0063] Optionally, the number of heat exchange internal teeth 412 on the upper inner wall of each refrigerant flow channel 411 is less than the number of heat exchange internal teeth 412 on the lower inner wall. In this way, the heat exchange internal teeth 412 on the upper inner wall and the lower inner wall of each refrigerant flow channel 411 form an asymmetric structure, and the multiple heat exchange internal teeth 412 on the upper inner wall of the refrigerant flow channel 411 cooperate with the multiple heat exchange internal teeth 412 on the lower inner wall to form disturbances on the refrigerant, further improving the disturbance effect of the refrigerant.
[0064] Combination Figure 6 As shown, in one embodiment, the refrigeration system further includes: a controller 900. The controller 900 is used to obtain the operating frequency of the compressor 300. In this way, when the outdoor ambient temperature rises, the heat exchange performance of the outdoor heat exchanger 200 will be affected, causing the compressor 300 to operate at a reduced frequency. Therefore, the controller 900 is set to obtain the operating frequency of the compressor 300, and the change in the operating frequency of the compressor 300 can reflect the current heat exchange performance of the outdoor heat exchanger 200. According to the change in the operating frequency of the compressor 300, the opening of the second throttling element 700 can be accurately controlled, thereby accurately adjusting the temperature of the refrigerant flowing into the shovel-fin auxiliary heat exchanger 400, so that the temperature of the heat exchange airflow after heat exchange with the shovel-fin auxiliary heat exchanger 400 is close to the outlet temperature required by the user.
[0065] Specifically, the controller 900 is used to obtain the frequency reduction value of the compressor 300, and adjust the opening of the second throttling element 700 according to the frequency reduction value of the compressor 300. In this way, the controller 900 can more accurately control the opening of the second throttling element 700 on the second branch by obtaining the frequency reduction value of the compressor 300, thereby more accurately adjusting the temperature of the refrigerant flowing into the shovel-fin auxiliary heat exchanger 400.
[0066] Optionally, the refrigeration system further includes: a temperature sensor 910. The temperature sensor 910 is arranged in the outdoor unit position where the outdoor heat exchanger 200 is located, and is used to detect the ambient temperature of the outdoor unit position. In this way, when the outdoor ambient temperature rises, the heat exchange performance of the outdoor heat exchanger 200 will be affected. Therefore, the temperature sensor 910 is arranged inside the outdoor unit position where the outdoor heat exchanger 200 is located to obtain the ambient temperature of the outdoor unit position, which can accurately reflect the heat exchange condition of the outdoor heat exchanger 200.
[0067] Optionally, the controller 900 is used to obtain the ambient temperature of the outdoor unit detected by the temperature sensor 910, and control the opening of the second throttling element 700 according to the ambient temperature of the outdoor unit. In this way, the controller 900 controls the opening of the second throttling element 700 according to the ambient temperature of the outdoor unit detected by the temperature sensor 910, thereby accurately adjusting the temperature of the refrigerant flowing into the shovel-fin auxiliary heat exchanger 400, so that the temperature of the heat exchange airflow after heat exchange with the shovel-fin auxiliary heat exchanger 400 is close to the outlet air temperature required by the user.
[0068] In some embodiments, an air conditioner comprises: the refrigeration system of the above embodiment.
[0069] By adopting the air conditioner provided by the embodiment of the present disclosure and applying the refrigeration system of the above embodiment to the air conditioner, when the outdoor environment is in a high temperature environment, even if the heat exchange performance of the air conditioner outdoor unit is affected, the heat exchange effect of the air conditioner indoor unit can be guaranteed, and the refrigeration effect of the air conditioner can be guaranteed.
[0070] The above description and the accompanying drawings sufficiently illustrate the 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. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The 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 the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims
1. A refrigeration system, characterized in that: include: Indoor heat exchanger (100); Outdoor heat exchanger (200); Compressor (300); A shovel-fin type auxiliary heat exchanger (400) is arranged on the leeward side of the indoor heat exchanger (100); The indoor heat exchanger (100) and the shovel-fin type auxiliary heat exchanger (400) are connected in parallel between a port of the outdoor heat exchanger (200) and a port of the compressor (300).
2. The refrigeration system according to claim 1, characterized in that: The shovel-fin type auxiliary heat exchanger (400) comprises: The heat exchange flat tube (410) is connected in parallel with the indoor heat exchanger (100) between the port of the outdoor heat exchanger (200) and the port of the compressor (300); A plurality of shovel fins (420) are provided, and the plurality of shovel fins (420) are evenly arranged on the outside of the heat exchange flat tube (410), and ends of the plurality of shovel fins (420) are connected to the outer side wall of the heat exchange flat tube (410).
3. The refrigeration system according to claim 2, characterized in that: The heat exchange flat tubes (410) and the shovel fins (420) are an integrally formed structure.
4. The refrigeration system according to claim 2, characterized in that: A plurality of refrigerant flow channels (411) are provided inside the heat exchange flat tube (410), and the flow area of each refrigerant flow channel (411) is greater than or equal to one third of the total flow area of the heat exchange flat tube (410).
5. The refrigeration system according to claim 4, characterized in that: A plurality of heat exchange internal teeth (412) are arranged on the inner walls on the two opposite sides of each refrigerant flow channel (411), and the plurality of heat exchange internal teeth (412) arranged on the inner walls on the two opposite sides of the refrigerant flow channel (411) are symmetrical structures to each other.
6. The refrigeration system according to claim 4, characterized in that: A plurality of heat exchange internal teeth (412) are arranged on the inner walls on the two opposite sides of each refrigerant flow channel (411), and the plurality of heat exchange internal teeth (412) arranged on the inner walls on the two opposite sides of the refrigerant flow channel (411) are asymmetric structures with respect to each other.
7. The refrigeration system according to claim 1, characterized in that: Also includes: The heat exchange fan (800) is arranged on the windward side of the indoor heat exchanger (100).
8. The refrigeration system according to any one of claims 1 to 7, characterized in that: Also includes: The controller (900) is used to obtain the operating frequency of the compressor (300).
9. The refrigeration system according to any one of claims 1 to 7, characterized in that: Also includes: The temperature sensor (910) is arranged in the outdoor unit where the outdoor heat exchanger (200) is located, and is used to detect the ambient temperature of the outdoor unit.
10. An air conditioner, characterized in that: include: A refrigeration system as claimed in any one of claims 1 to 9.