150 results about "Refrigerant distribution" patented technology

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 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.

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 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.

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 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.

This invention relates to the field of air conditioning technology, specifically providing an air conditioning system and its control method, which at least solves the problem of uneven refrigerant distribution among outdoor units in existing multi-split outdoor unit air conditioning systems. The air conditioning system includes indoor units and outdoor units, with each outdoor unit comprising multiple outdoor units connected in parallel. The control method includes: acquiring the current low-pressure and current subcooling of each outdoor unit; comparing the current low-pressure of each outdoor unit with a corresponding first preset pressure threshold, and comparing the current subcooling of each outdoor unit with a corresponding first preset subcooling threshold, wherein the first preset pressure threshold is determined based on the current low-pressure of the remaining outdoor units, and the first preset subcooling threshold is determined based on the current subcooling of the remaining outdoor units; based on the comparison results, determining whether each outdoor unit is short of refrigerant, and executing a corresponding refrigerant distribution strategy according to the determination result. This invention is beneficial for promoting a balanced distribution of refrigerant flow among the outdoor units.

The invention particularly relates to a flow dividing assembly and heating and ventilation equipment. The flow dividing assembly comprises a distributor and a second connecting pipe. The distributor is provided with an inflow hole, an expansion cavity and a plurality of flow dividing holes which are formed in sequence, and the inflow hole communicates with the flow dividing holes through the expansion cavity. And at least part of the second connecting pipe penetrates through the inflow hole and extends to the insertion section in the expansion cavity. In the direction from the inflow hole to the diversion hole, the first end of the insertion section is used for allowing a refrigerant to flow in, the second end of the insertion section is in a closed state and located in the expansion cavity, a plurality of outflow holes are formed in the circumferential direction of the insertion section, and the inflow holes are located in the expansion cavity and spaced from the second end of the insertion section. According to the flow dividing assembly, the blind pipe structure at the second end of the insertion section is used for mixing the backflow effect caused by flowing of gas and liquid refrigerants at the inlet, the effect of fully mixing the gas and liquid refrigerants is achieved, and the problems of bias flow caused by non-uniform distribution of the refrigerants in the inflow pipe and non-uniform mixing of the refrigerants in an old distributor are solved.

The embodiment of the invention provides a refrigerant flow control method and a refrigerant distribution system. The system is composed of a plurality of liquid cooling cabinets, a flow distribution module and a cooling capacity distribution unit, the flow distribution module is provided with a liquid supply loop and a liquid return loop, and the liquid supply loop is responsible for conveying a refrigerant cooled by the cooling capacity distribution unit to a liquid cooling server of each liquid cooling cabinet to achieve cooling. And the liquid return loop returns the refrigerant output by the liquid cooling server of each liquid cooling cabinet back to the cooling capacity distribution unit for cooling. The system solves the problems that the occupied area is increased and the maintenance workload is increased due to the fact that an independent flow distribution device occupies too much space and pipeline layout is dispersed.

The utility model discloses a direct-cooling single-machine double-temperature refrigeration control device, which adopts the arrangement of a single restrictor (capillary tube), and the single restrictor (capillary tube) is arranged between the output end of a condenser and the input end of a freezing evaporation tube, so that the non-uniform refrigerant distribution caused by different resistances of the two capillary tubes is effectively avoided; the problem of uneven liquid distribution is avoided, meanwhile, the cost is saved, the refrigerating pipeline directly extends to the refrigerating box from the freezing box, and the refrigerating efficiency is effectively improved; the electromagnetic valve is installed at the tail end of the refrigeration evaporation pipe, on-off of refrigerants is accurately controlled, the risk that the refrigerants excessively flow back to the compressor is reduced, therefore, the liquid impact phenomenon is avoided, stable operation of a refrigeration system is guaranteed, the tail end of the refrigeration evaporation pipe is a low-pressure air return section, high-pressure impact is reduced, and the service life of a product is prolonged.

The refrigerant distributor of the industrial refrigeration equipment comprises a refrigerant storage tank, a flow guide assembly, a mixing module, an adjusting unit and a multi-channel output module, an outlet is formed in the bottom of the refrigerant storage tank, and the flow guide assembly comprises a flow guide pipe, a quick release flange, a filter screen and a replaceable throttling core. The mixing module comprises a mixing cavity body, the adjusting unit comprises an electromagnetic adjusting valve, a stepping motor and a control circuit board, and the multi-channel output module comprises a main distribution pipe and a plurality of branch output pipes. The device has the advantages of integrated intelligent adjustment, efficient mixing and modular design. And through the composite mechanism of spiral diversion and high-frequency ultrasonic oscillation, the gas-liquid mixing uniformity is high, the layering problem of a traditional distributor is solved, and the heat exchange efficiency is improved. Impurities are effectively intercepted through a graded filtering structure (50-200 microns); and the replaceable throttling core body supports rapid adaptation of multiple types of refrigerants.

The invention belongs to the technical field of clothes drying equipment, and particularly relates to a parallel auxiliary cooling deep dehumidification closed heat pump clothes dryer and a control method.The parallel auxiliary cooling deep dehumidification closed heat pump clothes dryer comprises a drying chamber, a closed circulating air duct, a heat pump system, a rotary dehumidification device and a second air duct; a first evaporator, a moisture absorption area of the rotary dehumidification device and a first condenser are sequentially arranged in the closed circulating air duct, so that graded dehumidification and temperature rise are realized; the second air duct is independently arranged and communicated with the external environment, a dehumidification area of a rotary dehumidification device and a second condenser connected with the first condenser in parallel are arranged in the second air duct to provide heat for dehumidification, and a second evaporator connected with the first evaporator in parallel can be arranged to position dehumidified air. The closed main circulation air duct and the independent rotating wheel dehumidification air duct are combined, the rotating speed of the rotating wheel is controlled through parallel heat exchange components, differential refrigerant distribution and dynamic temperature feedback, efficient dehumidification is cooperatively achieved, and the system energy efficiency and operation stability are improved.

The invention relates to a refrigerant distributor (100) for a refrigerant circuit (200), comprising a material block (101), the material block (101) being designed to be rigidly mechanically coupled to a compressor (210) and to at least one heat exchanger (220, 221) of the refrigerant circuit (200), the material block (101) having one or more fastening points (120, 140) which are designed to mechanically fasten the material block (101) to an external frame, and a refrigerant reservoir (110) in the form of a bore being provided in the material block (101). The invention also relates to a refrigerant circuit (200) comprising such a refrigerant distributor (100) and to a machine, in particular a vehicle, comprising such a refrigerant circuit (200).

The utility model discloses a vapor compression refrigeration system, which is characterized by comprising a falling film evaporator, a falling film evaporator, a refrigerant inlet, a liquid outlet and an air outlet, the refrigerant inlet, the liquid outlet and the air outlet are arranged on the barrel, and the air outlet is communicated with an air inlet of a compressor; the condenser air inlet is communicated with the compressor air outlet; a refrigerant inlet of the evaporator is located in the top of the barrel, and a refrigerant distributor and a heat exchange pipe group are further arranged below the refrigerant inlet. The expansion machine is provided with an expansion machine liquid inlet and an expansion machine refrigerant outlet, the expansion machine liquid inlet is communicated with the condenser liquid outlet, and the expansion machine refrigerant outlet is communicated with the falling film evaporator refrigerant inlet. The heat exchange effect is improved, the refrigerant charging amount is reduced, meanwhile, the refrigerating capacity or the electric power consumption is not consumed, and high-efficiency operation of a refrigerating system is maintained.

The invention provides an air conditioning system which comprises an outdoor unit, an indoor unit and a water module, and a controller is configured as follows: when the water module performs heating, operation parameters of the indoor unit at the current moment are obtained, and meanwhile, the opening value of a second expansion valve at the moment is obtained; based on the operation parameters, a first superheat degree value at the current moment is determined; and when the first superheat degree value is larger than the first preset value and the opening degree value of the second expansion valve is not smaller than the second preset value, the first control strategy is controlled to run so as to reduce the opening degree of the first expansion valve. When the water module performs heating and the judgment conditions that the first superheat degree value is larger than the first preset value and the opening degree of the second expansion valve is not smaller than the second preset value are met, the key problem that refrigerant distribution deviates to the outdoor unit, and consequently indoor side refrigerant is insufficient can be accurately recognized; the refrigerant distribution proportion is actively inclined towards the indoor unit side, it is ensured that the indoor unit obtains sufficient refrigerant, and the refrigerating effect of the indoor unit under the 100% heat recovery working condition is remarkably improved.

The utility model relates to the technical field of air conditioners, and provides a liquid separating device and an air conditioning system, the device comprises a liquid inlet pipe, an outer pipe, a separating part and a plurality of liquid outlet branch pipes, the first end of the liquid inlet pipe is provided with an opening, and the side wall of the second end of the liquid inlet pipe is provided with a first through hole; the liquid inlet pipe is sleeved with the outer pipe, and a distribution cavity is defined by the outer pipe and the liquid inlet pipe; the partition component is arranged between the liquid inlet pipe and the outer pipe so as to divide the distribution cavity into a liquid inlet area and a liquid outlet area which are communicated with each other, and the liquid inlet area is communicated with the first through hole; the liquid inlet area is provided with a flow equalizing component; and the plurality of liquid outlet branch pipes are communicated with the liquid outlet area. Refrigerant enters the liquid inlet pipe through the opening of the liquid inlet pipe and enters the liquid inlet area through the first through hole, flow equalization is achieved under the action of the flow equalization component, and then the refrigerant is evenly distributed into the liquid outlet branch pipes after being mixed through the liquid outlet area. The condition that refrigerants entering all flow paths of the heat exchanger are not evenly distributed can be effectively improved, and the heat exchange performance of the heat exchanger is improved.

The invention provides a thermal management system control method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining parameters of a power battery; when the power battery and the passenger compartment have cooling requirements at the same time, the cooling grade of the power battery is obtained based on the parameters of the power battery; and the cooling priority and refrigerant distribution parameters of the passenger compartment relative to the power battery are determined based on the cooling grade of the power battery, and thermal management system control parameters are determined based on the refrigerant distribution parameters. When the power battery and the passenger compartment of the vehicle meet the cooling requirement at the same time, the cooling requirement of the power battery can be met, and the cooling requirement of the passenger compartment can be met.

The utility model discloses a collecting pipe, heat exchanger and air conditioner, the collecting pipe is provided with a plurality of branch outlets at intervals along the axial direction of the collecting pipe, the collecting pipe comprises at least two sub-pipes which are sequentially arranged along the axial direction of the collecting pipe, at least two adjacent sub-pipes are respectively an upstream pipe and a downstream pipe, the downstream end of the upstream pipe is sleeved outside the upstream end of the downstream pipe, the end part, extending into the upstream pipe, of the downstream pipe is centrally shrunk to form an inner pipe structure, the upstream pipe comprises an upstream main pipe positioned at the upstream of the inner pipe structure, the inner diameter of the inner pipe structure is smaller than that of the upstream main pipe, and a branch outlet is formed at the downstream end of the upstream pipe; fluid in the upstream pipe is sent out through the branch outlets and the inner pipe structure. According to the collecting pipe, machining is convenient, and the uniformity of refrigerant distribution and output can be improved.

The utility model discloses a kind of mixers for heat pump plate evaporator, including mixer main body, including connecting section, mixing section and rectifier section, the passage inside mixing section includes tapering speed-increasing section, arc throat section and gradual expansion pressure-increasing section;At least two spiral grooves are provided on tapering speed-increasing section, at least one spiral groove starts from the lower edge of the inlet and terminates at the upper edge of the outlet, and at least one spiral groove starts from the upper edge of the inlet and terminates at the lower edge of the outlet;The ratio of the length and the inner diameter of rectifier section is 3~5.The utility model can make gas-liquid two-phase in refrigerant uniformly mixed by tapering structure speed-increasing section tapering structure speed-increasing section and cooperate with the rotational flow shear of spiral groove;Meanwhile, by the cooperation of gradual expansion pressure-increasing section and rectifier section, the fluid radial force can be eliminated, to output flow state stable and two-phase distribution uniform refrigerant fluid, thereby improve the uniformity of refrigerant distribution between each passage of evaporator, improve heat exchange energy efficiency.

The invention provides a flow dividing assembly, a heat exchanger and an air conditioner. The flow dividing assembly comprises a flow collecting pipe, a flow divider and a flow disturbing assembly; the flow divider is provided with a refrigerant inlet and a refrigerant outlet, and the flow collecting pipe is provided with refrigerant liquid dividing holes. And one end of the turbulent flow assembly communicates with the refrigerant outlet, the other end of the turbulent flow assembly communicates with the refrigerant liquid separation hole, a refrigerant flows into the flow divider through the refrigerant inlet, the refrigerant is subjected to first turbulent flow in the flow divider, and the refrigerant spirally flows in the turbulent flow assembly to be subjected to second turbulent flow. The flow divider conducts primary flow division on the refrigerant, concentrated impact of the refrigerant is reduced, primary distribution is achieved, then the turbulent flow assembly further weakens the influence of gravity on the refrigerant through centrifugal force generated by spiral flow, the refrigerant is evenly dispersed, and re-optimization is completed.

A refrigerant distributor (101, 201, 301, 401, 501, 601) for a vehicle refrigeration circuit is proposed, comprising: - distributor plates (2, 3, 4) bonded together, which limit the refrigerant channels (7, 8) running between the distributor plates, - a connecting piece (9) that is materially bonded to one of the distribution plates (2), - and an expansion valve (10) included in the connecting piece with a valve piston (13) which separates the refrigerant channels from each other in contact with a valve seat (16). The valve seat shall be formed directly either by the connecting piece or by an insert (35) arranged therein, which is materially connected to one distributor plate.