245 results about "Refrigerant distribution" patented technology

The invention relates to the technical field of new energy automobile thermal management, in particular to a direct cooling and heating management system and method in an automobile power battery. The method comprises the following steps: acquiring vehicle real-time operation condition data and battery pack state monitoring data; working condition mode recognition processing is conducted according to the vehicle real-time operation working condition data, and vehicle working condition mode feature data are generated; performing thermal load demand analysis on the battery pack state monitoring data based on the vehicle working condition mode characteristic data to obtain dynamic thermal load demand data of the battery pack; and according to the dynamic thermal load demand data of the battery pack, refrigerant demand quantity calculation and analysis are carried out, the refrigerant supply capacity of the current direct cooling system is evaluated, and refrigerant supply and demand matching feature data are obtained. The specific requirements of three heat sources of the battery, the motor and the cockpit for the refrigerant flow are quantified, and a refrigerant distribution strategy is formed according to the proportional relation, so that the safety of the battery is improved, and the driving comfort and the working stability of the electric driving system are also guaranteed.

The invention discloses an airport ground air conditioning unit multi-system energy-saving control method and system, and the method comprises the steps: collecting refrigerant flow data, temperature monitoring data and load demand data of an airport air conditioning system, recognizing a phase change boundary, extracting a gas-liquid conversion point, and carrying out enthalpy value coupling in combination with superheat degree distribution to generate a phase change energy field; identifying heat transfer bottleneck points based on the phase change energy field, generating an equivalent thermal resistance network, and extracting heat capacity characteristic parameters to construct a thermal response path diagram; refrigerant shunting analysis is carried out to extract primary and secondary loops, and an optimal distribution point is identified to generate a load balance matrix; reconstructing a compressor adjusting curve, and identifying a high-efficiency operation interval to generate a frequency conversion adjusting sequence; determining an energy storage window period, and obtaining a dynamic buffer threshold to construct a peak clipping and valley filling instruction set; and an execution deviation track is monitored, the optimal convergence path is recognized, self-adaptive correction is conducted, an energy-saving control instruction is generated, and intelligent multi-system coordination efficient energy-saving control over the airport ground air conditioning unit is achieved.

The invention relates to the technical field of refrigeration equipment control, in particular to an air conditioner control method and system. Firstly, a refrigerant flow prediction model is established by combining the advantages of LSTM and XGBoost, a time sequence and static characteristics are accurately captured, prediction precision and system adaptability are improved, reliable data support is provided for intelligent regulation and control, refrigerant distribution is optimized, energy efficiency is improved, and energy consumption is reduced; secondly, the opening degree of an electronic expansion valve and the frequency of a compressor are controlled in a feedforward mode through a multivariable cooperative control algorithm, the load and the flow are accurately matched, the system efficiency is improved, it is ensured that all assemblies operate in a coordinated mode, energy waste is reduced, and stability and comfort are optimized; finally, PID feedback control is combined, the frequencies of the electronic expansion valve and the compressor are finely adjusted in real time, the optimal energy efficiency and stability of the system are ensured, closed-loop control is achieved, the temperature control precision is further improved, fluctuation is reduced, and the energy efficiency is optimized.

The air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a throttling assembly and a refrigerant circulation loop, and the refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger; the refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger; a main channel is arranged at one end of the distributor, a plurality of branch channels communicated with the main channel are arranged at the other end of the distributor, the main pipeline is connected to the main channel, and the flow dividing pipelines are connected to the branch channels; the distributor comprises an inner-layer pipe and an outer-layer pipe, the outer-layer pipe is provided with a plurality of outer flow guide holes distributed at intervals in the circumferential direction, and the inner-layer pipe and the outer-layer pipe can rotate between a first relative position and a second relative position. The air conditioner has the advantages of being even in refrigerant distribution, compact in structure, capable of improving heat exchange performance and the like.

The invention discloses a refrigerant distribution method of a heat pump system, the heat pump system and a heat pump unit, the heat pump system comprises a compressor and three heat exchangers, the compressor can be connected with any two heat exchangers to form a refrigerant circulation loop, and the remaining heat exchanger serves as an idle heat exchanger for temporarily storing a refrigerant; the refrigerant distribution method comprises the steps that the current operation mode of the heat pump system is obtained, and the current system load Qload and the evaporator heat transfer requirement of a refrigerant circulation loop are estimated according to the deviation between the actual user side temperature and the set user side temperature; and comparing the current system load Qload with the heat transfer demand of the evaporator, and controlling the idle heat exchanger to access or exit from the refrigerant circulation loop according to the comparison result and the current operation mode so as to adjust the amount of refrigerant participating in circulation in the refrigerant circulation loop and the heat exchange area. By dynamically monitoring the current operation mode and the operation parameters, it is ensured that the refrigerant amount can be efficiently distributed after the operation mode is switched, and the operation efficiency and stability of the system are improved.

The utility model relates to a flooded evaporator which comprises an evaporator cylinder, a refrigerant distributor, a heat exchange tube bundle and a refrigerant gas-liquid separator are sequentially arranged in the evaporator cylinder from bottom to top, the refrigerant distributor comprises a bottom plate, an inner partition plate, a flow guide plate, an accelerator plate, a speed reducing plate and an end plate, and a plurality of accelerator plate holes are evenly distributed in the accelerator plate. The inner partition plate, the flow guide plate and the two end plates form a flow guide cavity, the flow guide plate, the acceleration plate and the two end plates form an acceleration cavity, the flow guide cavity is communicated with the acceleration cavity, and the acceleration plate, the speed reducing plate and one end plate form a deceleration cavity. A refrigerant is processed by the refrigerant distributor to form a gas-liquid two-phase mixture with an intermittent flow or an annular flow, the gas-liquid two-phase mixture forms a thin liquid film on the surface of the heat exchange tube bundle, and turbulent flow falling film evaporation is carried out. Flow enhancement is achieved, the heat transfer performance is improved, the refrigerant filling amount is greatly reduced, and erosion abrasion of the refrigerant to a heat exchange tube bundle is reduced.

The invention provides a fluid distributor and a heat exchanger, and the fluid distributor comprises a first plate-shaped body which is provided with an inlet flow path; a second plate-shaped body in which first and second outlet flow paths are formed so as to be spaced apart from each other in the height direction; the flow guide frame is fixed between the first plate-shaped body and the second plate-shaped body in a sealed mode, the interior of the flow guide frame is divided into a first flow guide space and a second flow guide space, the flow guide frame comprises a flow equalizing plate which is adjacent to the inlet flow path in the height direction and located below the inlet flow path, and the flow equalizing plate comprises a flow equalizing plate bottom and a flow equalizing plate extending part; the bottom of the flow equalizing plate is located below the inlet flow path correspondingly, and the flow equalizing plate extending parts extend from the bottom of the flow equalizing plate to the positions above the two sides of the bottom of the flow equalizing plate in the mode of inclining to the height direction. And therefore, fluid flowing in from the inlet flow path is shunted to two sides of the bottom of the flow equalizing plate and is respectively guided to the first flow guide space to flow out from the first outlet flow path and the second flow guide space to flow out from the second outlet flow path. According to the invention, the uniformity and fault tolerance of refrigerant distribution are improved.

This application provides a fluid distributor and a heat exchanger. The fluid distributor includes: a first plate-shaped member in which an inlet flow passage is formed; a second plate-shaped member in which a first outlet flow passage and a second outlet flow passage spaced apart in a height direction are formed; a flow guide frame sealingly fixed between the first plate-shaped member and the second plate-shaped member, having a first flow guide space and a second flow guide space partitioned inside. The flow guide frame includes a flow equalizing plate, and the flow equalizing plate includes a flow equalizing plate bottom portion, and flow equalizing plate extension portions which extend upward from the flow equalizing plate bottom portion to two sides of the flow equalizing plate bottom portion while being inclined in the height direction. This application improves uniformity and a fault tolerance of a refrigerant distribution.

The header assembly comprises a first pipe, a first connector, a second pipe and at least one first plate, the first pipe is provided with a first end in the length direction, the first pipe comprises a first sub-pipe section and a second sub-pipe section, and the first sub-pipe section and the second sub-pipe section are arranged in the length direction of the first pipe; the first end is positioned on the first sub-pipe section; the first interface is communicated with the first sub-pipe section; the first plate is at least partially located in a pipe cavity of the first sub-pipe section, the first plate comprises a first channel, and the first channel can communicate with pipe cavities of the first sub-pipe sections on the two sides of the first plate; the second pipe comprises a first opening and a second opening, the first opening is located between the first end and the first plate, the second opening is located in the second sub-pipe section, and the second pipe communicates with the first sub-pipe section and the second sub-pipe section. According to the header assembly, the distribution effect can be improved, and refrigerants can be distributed more evenly.

The present application relates to a kind of photovoltaic direct-drive air source injection-compression combined cycle heat pump cogeneration system, the system includes refrigerant system, hot water system, power generation / power supply system, by compressor, check valve, hot water heat exchanger, two-phase ejector, gas-liquid separator, electronic expansion valve, intermediate cooler, finned heat exchanger, water pump, photovoltaic array, direct-current converter, AC / DC inverter is formed, system can realize cogeneration.The present application introduces injection refrigeration technology into air source heat pump technology, to reduce the throttling loss and overheating loss of traditional vapor compression cycle process, improve system performance;While using the method of low injection rate to supercool finned heat exchanger inlet refrigerant, the uniformity of finned heat exchanger refrigerant distribution is guaranteed, and its heat exchange efficiency is improved.The present application makes full use of renewable energy solar energy and air energy, realizes electric energy self-production, energy saving, efficient, green, low carbon.

The invention relates to an energy storage synergistic air source heat pump system and a control method thereof. The system main loop comprises a compressor, a four-way reversing valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first throttling element, a second throttling element and a gas-liquid separator. A first bypass branch (with a first regulating valve) and a second bypass branch (with a second regulating valve) are additionally arranged. And an energy storage module is additionally arranged and exchanges heat with the second heat exchanger through second fluid or is directly integrated in the refrigerant loop. In the heating mode, heat storage / heat removal switching of the energy storage module is achieved through regulation and control of the double throttling elements; a bypass branch regulating valve is used for controlling refrigerant distribution, and non-stop defrosting is completed while heating is maintained; in the refrigeration mode, the double-throttling-element state is switched to enable the second heat exchanger to serve as an evaporator for cold storage, and cold storage capacity is released under the high-temperature working condition to improve the system capacity.

The embodiment of the invention provides a control method of a heat recovery system, a controller, the heat recovery system and a medium. The heat recovery system comprises a water tank, an outdoor unit, an indoor unit and a control valve, and the control valve comprises a first valve used for adjusting the flow of a refrigerant flowing through a water tank coil and a second valve used for adjusting the flow of a refrigerant flowing through an outdoor unit coil; under the condition that the heat recovery system executes the partial heat recovery mode, a target priority mode is obtained, and the target priority mode comprises a refrigeration priority mode or a water heating priority mode; and the opening degree of a control valve is adjusted according to the target priority mode so as to distribute the refrigerant flow flowing through the water tank coil pipe and the outdoor unit coil pipe. The heat recovery system can rapidly adjust the opening degree of the control valve through refrigeration priority and heating priority control, it is guaranteed that refrigerants of the water tank coil and the outdoor unit coil are reasonably distributed, the heat exchange efficiency is improved, the system operation energy efficiency is improved, and the actual requirements of users are met.

The invention relates to the technical field of single-phase immersion liquid cooling data processing, and particularly provides an intelligent constant-temperature single-phase immersion data center composite liquid cooling control method and system, and the method comprises the steps: monitoring the temperature change of a server mainboard in real time through a temperature sensing bulb, converting the temperature data into an electric signal through the temperature sensing bulb, and transmitting the electric signal to the server mainboard; the electric signal is transmitted to the data integration processor as an input signal; after the data integration processor receives the electric signal, an internal processor performs calculation according to a preset algorithm to generate a refrigerant flow control signal; the electromagnetic valve adjusts the refrigerant distribution amount of the liquid separator according to the refrigerant flow control signal, and regulation and control of the refrigerant flow are achieved. The adjusted refrigerant flow acts on the phase change heat absorption process of the refrigerant in the coil pipe, so that the temperature of the fluorinated liquid is stable. The system comprises a coil pipe, a server, a liquid separator, a data integration processor, a server mainboard, a temperature wrap, an evaporator and the like. The data integration processor generates a refrigerant flow control signal according to a feedback signal to form a closed-loop control loop.

The application belongs to the technical field of refrigeration equipment, and particularly relates to a distributor and application thereof. In the combination process of an acceleration hole plate and a distribution pipe, the single-hole opening of the acceleration hole plate is too large, resulting in poor gas-liquid mixing effect. The acceleration hole plate causes a large pressure drop. For a heat pump, throttling occurs after passing through the hole plate during heating, so that the liquid-phase refrigerant becomes gas-liquid two-phase refrigerant, thereby reducing the system performance. The application provides a distributor, which comprises a variable-diameter sleeve pipe. The variable-diameter sleeve pipe comprises a plurality of sub-sleeve pipes which are sequentially communicated. The diameters of the sub-sleeve pipes sequentially decrease. The largest-diameter sub-sleeve pipe, a connecting pipe and a liquid inlet pipe are sequentially communicated. A plurality of liquid outlet pipes are arranged on the sub-sleeve pipe and communicated with the sub-sleeve pipe. Uniform gas-liquid mixing is achieved, and the effect of uniform refrigerant distribution is achieved.

The present invention relates to a refrigerant distributor, and an object of the present invention is to provide a refrigerant distributor having a reinforcing structure for improving a pressure-sensitive area. Specifically, another object of the present invention is to provide a refrigerant distributor in which a plurality of flow paths are formed, a rib, which is a pressure-reinforcing structure, is formed on a seal plate at a position of the flow path with a relatively large cross-sectional area, or a bridge, which is a pressure-reinforcing structure, is formed on a casing at a loop position formed by the flow path with a relatively large cross-sectional area.

This invention relates to the field of air conditioning technology and discloses a low-noise, low-energy-consumption dual-compressor refrigeration system. It replaces a single high-power compressor with two low-power compressors, with the two low-power compressors having a higher capacity than a single high-power compressor. While maintaining the same power requirement, the system reduces its size and weight through a ring-shaped fixed weight-reduction method, further reducing compressor vibration and noise. Based on the actual low cooling / heating demand, the operating power of the two compressors is proportionally controlled to minimize energy consumption. Especially during battery thermal management, the low-power compressor provides power, further avoiding frequent compressor starts and reducing energy consumption during low-power operation, thus providing better energy efficiency for the entire vehicle. The evaporator is arranged on both sides of the condenser. With dual compressors, the air conditioning system is adjusted from a single circuit to two independent circuits, thus avoiding uneven refrigerant distribution and significant perceived temperature differences between the left and right sides.

The application provides a liquid distribution device and a falling film evaporator. The liquid distribution device comprises a flow equalizing assembly, the flow equalizing assembly comprises a first flow channel, a plurality of baffles are installed in the first flow channel, and the plurality of baffles are arranged in a spaced manner and opposite to each other along the first flow channel, so that the falling film evaporator has excellent refrigerant distribution capacity and can uniformly distribute refrigerant to achieve the purpose of high-efficiency refrigeration.

Heat exchanger device (10) of a refrigeration system of a motor vehicle through which refrigerant flows, with a plurality of heat exchangers (12, 14, 121, 141) arranged substantially parallel to one another, which are connected in series to one another in refrigerant connection, wherein each heat exchanger (12, 14) has a refrigerant distribution section (12a, 14a) along a first side and a refrigerant collection section (12b, 14b) along a second side, wherein a refrigerant collection section (12b) of a heat exchanger (12) preceding it in the flow direction (SR1, SR2) of the refrigerant is connected to the refrigerant distribution section (14a) of the subsequent heat exchanger (14), and wherein the flow direction (SR1) of refrigerant between the refrigerant distribution section (12a) and the refrigerant collection section (12b) of a preceding, first heat exchanger (12) is different from the flow direction (SR2) of refrigerant between the refrigerant distribution section (14a) and the refrigerant collection section (14b) of a subsequent, second heat exchanger (14) which immediately follows the first heat exchanger (12), characterized in that a valve device (22, 24) is arranged upstream of the refrigerant distribution section (12a, 14a) on at least one of the plurality of heat exchangers (12, 14) and the flow direction (SR1) of refrigerant in the first heat exchanger (12) and the flow direction (SR2) of refrigerant in the second heat exchanger (14) are substantially orthogonal to each other.

The present application provides a microchannel heat exchanger and a heat pump system. The microchannel heat exchanger comprises a first header (1), a second header (2) and a flat tube (3), wherein the flat tube (3) is connected between the first header (1) and the second header (2), and a plurality of isolation structures are arranged on the second header (2) at intervals along the axial direction, wherein the isolation structures are used to separate the second header (2) into a plurality of tube sections (4) with tube cavities (5) being isolated from each other, and each tube section (4) is connected to a refrigerant pipe (6). According to the microchannel heat exchanger and the heat pump system of the present application, the refrigerant distribution condition of the heat exchanger can be effectively improved when the number of flat tubes is large, thereby improving the heat exchange performance of the heat exchanger.

The utility model discloses a high-efficiency equipartition type refrigerant shunting structure which comprises a pipe body, a shielding assembly used for adjusting the throughput of a refrigerant is arranged in an inner cavity of the pipe body, and a filtering assembly used for filtering the refrigerant entering the pipe body is arranged at a top opening of the pipe body. The top and the bottom of the pipe body are connected with an input pipe used for conveying refrigerating fluid and an equipment connecting pipe connected with equipment through detachable connecting pieces correspondingly, through the arrangement of the shielding assembly, a hand wheel is rotated towards one side, a connecting rod can be made to rotate to drive baffles to rotate, the other set of baffles are driven to rotate inwards at the same time through the linkage assembly, and therefore the refrigerating fluid can be conveyed. Therefore, the shielding area of the baffle to the inner cavity of the pipe body is changed, the throughput of the refrigerant is adjusted, the actual refrigeration requirements of different areas are met, and the flow distribution of the refrigerant in the branch is accurately adjusted.

The present invention provides a refrigerant circulation system that can supply an appropriate flow rate of refrigerant to each of multiple cooling targets individually. [Solution] An exemplary embodiment of the refrigerant circulation system comprises a plurality of first heat exchange units, a second heat exchange unit, a first flow path, and a second flow path. A first heat exchange unit is provided for each object to be cooled. The second heat exchange unit is equipped with a heat exchanger. The first flow path distributes refrigerant from the second heat exchange unit to the plurality of first heat exchange units. The second flow path combines the refrigerants returned from the plurality of first heat exchange units and recovers them in the second heat exchange unit. Each first heat exchange unit is equipped with a pump. The pump sends the refrigerant supplied from the first flow path to the cooling section that cools the object to be cooled by the refrigerant, and then sends it to the second flow path.

To provide a heat exchanger capable of distributing a homogeneous refrigerant to a plurality of heat transfer pipes even under gravity, and to provide an air conditioner.SOLUTION: A heat exchanger 37 includes a plurality of heat transfer pipes 43, and a first header 39. The first header 39 includes a laminate 59 on which a first plate 53 having a through-hole 51 for allowing a refrigerant to flow in, a second plate 55 to which the plurality of heat transfer pipes 43 is connected, and a plurality of intermediate plates 57 arranged between the first plate 53 and the second plate 55 are laminated. The laminate 59 includes: a front chamber 75 connected to the through-hole 51 of the first plate 53; a plurality of rear chambers 77, 79 arranged side by side having an interval in the first direction from the front chamber 75, and connected to each of the heat transfer pipes 43; and a plurality of flow passages 69, 73 for allowing the refrigerant to flow into the rear chambers 77, 79 respectively from the front chamber 75. Each of the plurality of flow passages 69, 73 has inlets 69a, 73a provided at a partition wall 81 for partitioning the front chamber 75 and the rear chamber 79 adjacent to the front chamber 75.SELECTED DRAWING: Figure 3

The utility model discloses an evaporator, a heat management system and a vehicle, and relates to the technical field of heat exchange. The evaporator comprises a body and a plurality of refrigerant distribution structures, first heat exchange flow channels are formed between adjacent heat exchange plate sets of the body, and refrigerant flow channels are formed in the heat exchange plate sets. A first annular part of the refrigerant distribution structure is provided with a distribution cavity and a first refrigerant outlet, a refrigerant annular channel is formed between the first annular part and a second annular part, and the second annular part is provided with a second refrigerant outlet. Due to the fact that the first refrigerant outlet is located below the second refrigerant outlet, when the flow of the refrigerant is low, part of the liquid refrigerant is accumulated in the refrigerant annular channel and seals the first refrigerant outlet in a liquid mode, the resistance of the refrigerant passing through the first refrigerant outlet is increased, the refrigerant can flow to the first refrigerant outlet which is not sealed in the liquid mode, the uniformity of refrigerant distribution is improved, and the service life of the refrigerant is prolonged. The heat exchange efficiency of the evaporator is improved. When the flow of the refrigerant is high, the refrigerant in the refrigerant loop is in a gas-liquid mixed mist shape, no liquid seal exists at the first refrigerant outlet, and the influence on flowing of the refrigerant is small.

The utility model discloses a liquid cooling plate which comprises an upper cover plate and a lower cover plate, and a main flow channel is formed between the upper cover plate and the lower cover plate; the water inlet nozzle is communicated with the water inlet of the main flow channel and is used for allowing a refrigerant to flow in; the water outlet nozzle is communicated with a water outlet, corresponding to the water inlet, of the main runner and is used for allowing a refrigerant to flow out; the heat exchange columns are arranged in the main flow channel, and the densities of the heat exchange columns in different areas in the main flow channel are different. According to the liquid cooling plate, the plurality of heat exchange columns are arranged, so that the structural strength of the liquid cooling plate can be enhanced, the contact area between a refrigerant and the flow channel wall can be increased, and the heat exchange efficiency is improved. Besides, the heat exchange columns with different densities are arranged in different areas, so that the flow distribution of the refrigerant in the flow channel can be optimized, the refrigerant is uniformly distributed, and the uniformity of the heat dissipation performance of the liquid cooling plate is improved.

The embodiment of the utility model discloses a refrigerant heater. The refrigerant heater comprises a snakelike flat pipe, the snakelike flat pipe comprises a plurality of U-shaped bent parts and a plurality of flat pipe sections arranged in parallel in the first direction, and the flat pipe sections are connected through the U-shaped bent parts to form a continuous flow channel; at least two flat tube runners are arranged in the snakelike flat tube; the flat pipe flow channels are arranged in parallel in the second direction and are used for refrigerant circulation; wherein the first direction is perpendicular to the second direction; and the at least one heating sheet is arranged between the adjacent flat pipe sections. According to the embodiment of the utility model, the problem that the existing energy storage battery pack lacks a small refrigerant heater which is not in direct contact with a refrigerant is solved, and meanwhile, the problem of dry burning caused by non-uniform refrigerant distribution is avoided.

A heat exchanger of the present disclosure comprises a plurality of heat transfer tubes arranged parallel to one another in a first direction, and a refrigerant distributor to which the plurality of heat transfer tubes are connected, the refrigerant distributor extending in the first direction and having a connection opening to which a refrigerant tube is connected, the refrigerant distributor comprising an outer tube to which the plurality of heat transfer tubes are connected, the outer tube extending in the first direction, an inner tube enclosed within the outer tube and extending in the first direction, and a partition plate configured to divide a first space formed between the inner tube and the outer tube into a plurality of compartments in the first direction, the inner tube having a through-hole configured to form a second space.which is formed within the inner tube, to communicate with the first space, wherein the second space is configured to communicate with the connection opening at an end section in the first direction of the inner tube, and wherein two adjacent areas in the first direction of the plurality of areas are configured to communicate with each other via the opening.

The utility model relates to the technical field of air conditioners, and discloses a header component with a conducting component. The first conduction component is arranged on the main pipe section in an on-off mode and divides the main pipe section into a first pipe section and a second pipe section; a refrigerant can flow from the first pipe section to the second pipe section, the first pipe section is provided with a first branch pipe, and the second pipe section is provided with a second branch pipe; wherein the pipe inner diameter of the first pipe section is w1, the first conduction part is provided with a first conduction opening with the diameter of w2, and w2 / w1 is larger than or equal to 0.6 and smaller than or equal to 0.85. And by reasonably setting the value of w2 / w1, excessive pressure loss is prevented. In this way, the refrigerant distribution amount of the first branch pipe and the refrigerant distribution amount of the second branch pipe are effectively balanced. The utility model further discloses the heat exchanger and an air conditioning system.

The utility model relates to the technical field of heat exchange equipment, and discloses a heat exchanger which comprises a plurality of heat exchange tube sets and a flow path switching assembly. Each heat exchange tube set comprises one or more heat exchange branches, the flow path switching assembly communicates with the multiple heat exchange tube sets and is used for adjusting the communication mode of the multiple heat exchange tube sets, when the heat exchanger serves as a condenser, the flow path switching assembly enables the multiple heat exchange tube sets to communicate in series, and when the heat exchanger serves as an evaporator, the flow path switching assembly enables the multiple heat exchange tube sets to communicate in series. The flow path switching assembly enables the multiple heat exchange tube sets to be communicated in parallel. Wherein the flow path switching assembly at least comprises a primary liquid separation element, an intermediate liquid separation element and a final liquid separation element, and when the heat exchanger serves as an evaporator, a refrigerant flowing in through the refrigerant inlet and outlet of the heat exchanger at least sequentially passes through the primary liquid separation element, the intermediate liquid separation element and the final liquid separation element and then flows into at least one heat exchange tube set in the multiple heat exchange tube sets. According to the heat exchanger provided by the utility model, the refrigerant distribution uniformity of each heat exchange tube group is improved. The invention further discloses an air conditioning system.

The invention relates to a refrigerant distributor (100) for a refrigerant circuit (1000), comprising a material block (101) with a deep bore (110) having a bore axis (112), wherein several branch bores (120, 130, 140, 150), which are at least partially spaced apart from one another along the bore axis (112), open laterally into the deep bore (110), and wherein one or two first branch bores (140, 150) of the several branch bores (120, 130, 140, 150) are configured as a valve seat (140) and / or valve outlet (150) for an expansion valve (400), and a second branch bore (120) of the several branch bores (120, 130, 140, 150) is configured as an inlet connection, which is configured to allow at least a partially to introduce liquefied refrigerant, containing in particular propane, into the deep borehole (110). Furthermore, a refrigerant circuit (1000) and a vehicle are proposed.

The double-row heat exchanger comprises a first heat exchange part and a second heat exchange part, the first heat exchange part comprises a first collecting pipe and a plurality of first heat exchange pipes, the first heat exchange pipes communicate with the first collecting pipe, the first collecting pipe comprises a first pipe section and a second pipe section, and the second heat exchange part is located on one side of the first heat exchange part in the thickness direction; the second heat exchange part comprises a second collecting pipe and a plurality of second heat exchange pipes, the second heat exchange pipes communicate with the second collecting pipe, and the second collecting pipe comprises a third pipe section and a fourth pipe section; the double-row heat exchanger further comprises a first communicating piece, a second communicating piece and a first flow guide piece, the first communicating piece communicates with the first pipe section and the fourth pipe section, the second communicating piece communicates with the third pipe section and the second pipe section, and at least part of the first flow guide piece is located in a pipe cavity of the fourth pipe section. The first pipe at least partially extends along the length direction of the fourth pipe section; the double-row heat exchanger can improve the uniformity of refrigerant distribution.