The flow of fluid
(57) Abstract:Usage: refrigeration appliances, in particular in devices for maintaining fluid flow through the object with a variable hydraulic resistance. The inventive regulator includes a housing 8 made in the form of thin-walled shells. Inside are hollow rod 7 connected to the housing by means of a spring 5 and pins 6 having a needle valve 9 and the seat 11. The inner surface of the rod 7 and the inner surface of the housing 8 is formed an axial grooved channel, and the housing is located inside the pipeline 1 in his section. 1 C. p. F.-ly, 1 Il. The invention relates to refrigeration, and controls the flow of liquid or gas passing through the heat exchangers, mainly refrigeration equipment and systems.In the chambers of the cooling and freezing refrigerators installed coolers connected in parallel to the collector supply of liquid ammonia and removal of vapors of ammonia or ammonia vapor-liquid mixture. Due to a complex of factors (different configurations of channels, different thermal loads, and so on), the liquid refrigerant may not be distributed evenly across all of vzducholod what ozdoravlivleniem put or throttle washer or valve. These funds have little effect on the uniformity of ammonia, as in the process change the load on each cooler in its own way. So you want an automatic device that provides a constant fluid flow through each device when changing the characteristics of the latter in the process, or significantly 10-20-fold increase in the rate of circulation of the ammonia through the heat exchanger by a pump. Thus, throttle washer and valve are analogous to control fluid flow respectively constant and adjust manually. Their main disadvantage is the complexity and the complexity of control the distribution of liquid ammonia in the air.This disadvantage is not present in known regulator of fluid flow, comprising a housing with a device for fastening in the context of the pipeline inside the casing are with valve stem, saddle and spring, and the outer surface of the rod and the inner surface of the housing to form a channel. This regulator is used to regulate the flow of cooling water through the condenser. The signal serves as the condensing pressure of the refrigerant vapor. However, this control is not applicable for poderia food as pressure in the reservoir connected to the coolers, are maintained constant. The specified control fluid flow is the closest analogue of the device and is taken as a prototype.The aim of the invention is the provision of automated maintenance of a constancy of flow of liquid refrigerant through connected in series with the regulator heat exchanger when changing the hydraulic resistance of the device in the process.Comparative analysis with the prototype shows that the proposed control fluid flow differs in that the controller is equipped with pins, which are spring, the rod is made hollow and is connected to the casing using studs and the body is made in the form of thin shells, the valve has a needle placed in the saddle, which is installed in the end of the channel along the flow, and the mounting device is a flange, on which a connector of a cantilever housing-side shaft, and the channel is axial and calibrated that the housing is located inside the pipe, and the connector is made in the form of a threaded connection.Thus, the proposed control fluid flow from the>The study of other technical solutions, for example, means increasing the frequency of the circulation pump circulation cooling systems found that they do not provide a reliable constant refrigerant mass flow through the cooler in comparison with the proposed device, reduce the reliability of the whole system and lead to increased consumption of electricity to drive circulation pumps.The drawing shows the flow of the fluid section.The flow of fluid is installed in the section of the pipeline 1 with flanges and consists of a flange 2 control fluid flow, threaded connection 3 of the flange 2 with the housing 8, the studs 4, springs 5, the studs 6, the hollow shaft 7, the housing of the regulator in the form of thin shell 8, the cylindrical part of the valve 9, the valve of variable cross-section (needle) 10 and seat 11.The needle 10 may be made conical or other special profile (parabolic composed of different cones, in the form of a body of rotation or square, multi-faceted, and so on ) depending on the operating modes over temperature, costs and types of liquid (single phase, multiphase, water, ammonia, oil, oil mixture and ammonia and so on ).The controller operates as follows. When the flow of liquid in the calibrated channel between the housing 8 and the shaft 7 under the action of viscous forces the rod 7 is moved in the direction of the fluid. The rod 7 is also affected by the pressure drop in the pipe 1 before and after the regulator. The rod 7 with the valve 9 and the needle 10 in the equilibrium state is retained by the spring 5. When increasing the liquid flow rate through the regulator (decreased hydraulic resistance of the cooler), viscous forces and pressure drop are promoting the valve 9 with the needle 10 to the fluid flow and increase the hydraulic resistance of the regulator on the numerical value falling in the cooler.When increasing the hydraulic resistance of the air cooler, for example, with increasing heat load on the cooler, at first decreases the fluid flow, and then it is restored by reducing the hydraulic resistance of the flow (change the position of the rod 7 with the needle 10 relative to the seat 11).The prototype nasty.Console mount housing 8 of the regulator on the flange 2 allows the same flange mounted regulators, designed to maintain different nominal flow, i.e. to unify mount controls fluid flow.Cantilever mounting of the flow regulator allows you to ensure reliable operation of the regulator and bending of the pipeline after 1 flange 2 within the gap between the valve seat 11 (or the end of the needle 10 and the inner surface of the pipeline 1. In addition, facilitated maintenance of the regulator because of the availability for inspection of the main working parts - seat, needle, rod, spring.Performance and reliability regulator tested in experiments with water. Proven its ability to maintain constant water flow when changing the hydraulic resistance of the air cooler at 2.5 kg/sq., see (56) Uman C. C. automation of refrigeration units. M : Food industry, 1973, S. 171, Fig. 110A. 1. The FLOW of FLUID, comprising a housing with a device for fastening in the context of the pipeline inside the casing are with valve stem, saddle and spring, and the outer surface of the rod and the inner surface the stem are hollow and connected to the housing by means of springs and pins, and the body is made in the form of thin shells, the valve has a needle placed in the saddle, which is installed in the end of the channel along the flow, and the mounting device is a flange, on which a connector of a cantilever housing-side shaft, and the channel is axial and calibrated.2. The regulator under item 1, characterized in that the housing is located inside the pipe, and the connector is made in the form of a threaded connection.
FIELD: cooling equipment, particularly to control coolant flow.
SUBSTANCE: flow regulator is formed of capillary tubes serially connected one to another and having different inner diameters and lengths. The capillary tubes are arranged so that capillary tube having greater diameter is installed before one having lesser diameter in direction of coolant flow from cooling unit condenser.
EFFECT: increased efficiency of cooling unit operation in cooling and heat pump regimes, as well as simplified manufacturing and computation.
FIELD: heating; refrigerating or freezing plants.
SUBSTANCE: closed refrigerating circuit comprises compressor (1), condenser (2), evaporator (4), receiver (9), capillary tube (8) between condenser and receiver, capillary tube (10) between receiver and evaporator and thermal contact (11) between suction pipeline and receiver. Suction pipeline is oriented so that sucked gas passes through receiver from its lower part to upper part. Cooling agent in receiver flows from its upper part to lower part. There is thermal contact (12) between suction pipeline and capillary tube (8), which connects condenser and receiver.
EFFECT: superheating of sucked gas, prevention of water condensation in suction pipeline and increased efficiency factor.
2 cl, 3 dwg
FIELD: instrument making.
SUBSTANCE: invention relates to refrigerating equipment. The proposed refrigerating unit incorporates consecutively mounted device to increase operating medium temperature and pressure, condenser, throttling device and evaporator. It comprises additional pipeline with its input connected to aforesaid device that serves to increase operating medium temperature and pressure and output connected to condenser output and throttling device input. Aforesaid additional pipeline is fitted parallel to the said condenser and furnished with superheated vapor metered-feed device that receives the said superheated vapor from the device to increase operating medium temperature and pressure. The superheated vapor metered-feed device represents a jet, electromagnetic valve, or servo-drive gate.
EFFECT: increased refrigeration ratio.
2 cl, 4 dwg
SUBSTANCE: cooling loop (2) for circulation of coolant in preliminary specified direction of flow contains in the direction of flow heat-eliminating heat exchanger (4), throttle valve (8) of evaporator, evaporator (10), compressor (22), internal heat exchanger (16), "cold face" of which is located between evaporator (10) and compressor (22), sensor (24) of temperature on inlet, located between evaporator (10) and internal heat exchanger (16), and sensor (26) of temperature on inlet, located between internal heat exchanger (16) and compressor (22), and control device (28) for control of throttle valve (8) of evaporator on the basis of measurements by temperature sensors on outlet and inlet. Control device is implemented with ability of control by throttle valve (8) of evaporator on the basis of installation of temperature on outlet in sensor (24) of temperature on inlet and shift of temperature installation on outlet on the basis of measurement by sensor (26) of temperature on outlet.
EFFECT: providing of adaptation of cooling loop to different conditions of operation in winter and summer modes.
12 cl, 1 dwg
SUBSTANCE: proposed invention relates to a refrigerating unit with a throttle pipe (1) and a suction pipe (2) for cooling agent; the throttle pipe (1) in the first point (A) of the suction pipe (2) is inserted into the suction pipe (2) and connected to it. The throttle pipe (1) and the suction pipe (2) are interconnected in another, second point (B) of the suction pipe (2) where the outer surfaces of the throttle pipe (1) and the suction pipe (2) are contacting. As per the invention the outer surfaces of the throttle pipe (1) and the suction coil (2) in the second point (B) are interconnected by ultrasonic welding. The proposed invention relates also to the method of connection of the throttle pipe (1) and the suction pipe (2).
EFFECT: application of the invention allows for the cheap and simple protection of the throttle pipe against crumpling at the point of insertion into the suction pipe.
6 cl, 1 dwg
FIELD: heating systems.
SUBSTANCE: suction orifice tube intended for refrigerating device includes suction tube (13) routed parallel to suction tube (13), orifice tube (14) and adhesive tape (19), the middle strip (20) of which is bonded to orifice tube (14), and two side strips (21, 22) enveloping middle strip (20) are bonded to suction tube (13) and covered on suction tube (13) from the side opposite to orifice tube (14). Free end of side strip (21, 22) is sealed with plastic or elastic mixture. Suction orifice tube manufacturing device has at least the first and the second roller (1, 2; 3, 4; 5, 6; 7, 8), the circles of which face each other and form clearance (15, 24); at that, at least on circumferential surface of the first roller (1; 3; 5; 7) there is slot (10, 25) for suction tube for directing suction tube (13) through clearance (24), and at slot bottom (10, 25) for suction tube there formed is slot (12) for orifice tube for directing orifice tube (14) in contact with suction tube (13).
EFFECT: use of invention will allow increasing resistance of suction orifice tube.
9 cl, 8 dwg
SUBSTANCE: cooling circuit for circulation of carbon dioxide as cooling agent in it has the first expansion device for expansion of cooling agent from high pressure to intermediate pressure and the second expansion device for expansion of cooling agent from intermediate pressure to evaporation pressure. The first expansion device is made in the form at least of two in-parallel connected valves (a, b, c, d) so that in case of failure in the valve (a) or at the valve (a) the latter is switched off, and at least one of the remaining operating valves (b, c, d) continues providing the controlled operation of cooling circuit.
EFFECT: use of invention excludes the need for switching off the whole cooling circuit in case of failed valve.
13 cl, 1 dwg
FIELD: power industry.
SUBSTANCE: thermal-pipe steam-ejector cooling machine includes evaporation chamber of high pressure, which is connected to nozzle inlet of ejector. Receiving chamber of ejector is connected to evaporation chamber of low pressure. Diffuser is connected to condensation chamber equipped with wick. Evaporation chambers of high and low pressure are placed coaxially in one housing, their side walls are covered from the inside with wicks covered in their turn with casings with gaps at upper and lower edge walls. Evaporation chambers are divided between each other as to steam with horizontal partition connected to casing of evaporation chamber of high pressure. Inside evaporation chamber of high pressure there located is entrainment trap and receiving pipeline connected to distributing pipeline located in evaporation chamber of low pressure. After horizontal partition, the housing is equipped on the lateral side with vertical partitions after which there placed are condensing chambers covered from the inside with their wicks separated between each other with a partition into high-pressure segment and low-pressure segment. Ejectors are mounted into vertical partitions of condensing chambers and connected with their nozzle inlets to evaporation chamber of high pressure through distributing and receiving pipelines.
EFFECT: increasing efficiency of thermal-pipe steam-ejector cooling machine.
FIELD: machine building.
SUBSTANCE: cooling or heating system contains at least compressor (2), condenser (4), adjusting device (17A), evaporator (20) and control device (7A). Control device (7A) receives liquid from condenser (4) and has an outlet orifice into pipeline (9) for condensate and inlet facilities coming into signal channel (6, 10). Pipeline (9) for condensate is coupled with adjusting device (17A). Control facilities (12, 13) are connected to the signal channel for control over adjusting device (17A) opening. The system is equipped with evaporating facilities (8, 11, 18, 34) for evaporation of liquid coming into signal channel (6, 10). Control device (7A) is installed in the condenser or near inlet orifice of condenser (4), owing to which the said control is actuated with amount of liquid evaporated in signal channel (6, 10).
EFFECT: reduced losses of power.
17 cl, 7 dwg
SUBSTANCE: disclosed is a method of calibrating an overheating sensor (5) for a refrigeration system, according to which: the amount of liquid coolant in the evaporator (1) is increased, for example, by increasing the degree of opening of the control valve (3); at least one parameter, for example, temperature of the coolant coming out of the evaporator (1), is monitored, from which the overheating value of the coolant can be determined; the possibility of reducing said parameter is provided; when the value of the monitored parameter is set at an essentially constant level, the corresponding overheating (SH) value is taken as zero; the overheating sensor (5) is calibrated in accordance with said level at which the overheating value (SH) is equal to zero. A constant level of the value of said parameter indicates that the liquid coolant can pass through the evaporator (1) and, consequently, the overheating value of the coolant at the outlet of the evaporator (1) is equal to zero.
EFFECT: disclosed method enables to calibrate an overheating sensor at the operating site of the refrigeration system, owing to which there is no need to calibrate said sensor at the manufacturing plant and, as a result, the need to monitor conformity of calibration data of a particular sensor.
11 cl, 10 dwg