Segmented condenser for low-temperature environment and refrigerating system

Abstract

The utility model relates to an air-cooled sectional condenser in a refrigerating unit and a refrigerating system. When the condenser is in a low-temperature environment, due to the fact that the condensing temperature is too low, the heat recovery amount is insufficient, and equipment shuts down frequently. The expansion fins are arranged on the heat exchanger body, the heat exchange copper pipes and the collecting pipes are reasonably arranged, and the heat exchange efficiency is improved. And the electromagnetic valve, the sensor and various valves are utilized to accurately control the flow, pressure and temperature of the refrigerant, so that the equipment is prevented from being shut down due to abnormal pressure. The secondary heat exchanger, the air cooler side fan and the like cooperate to optimize the refrigeration process, and the temperature and humidity adjusting problem is solved. In addition, intelligent control is achieved through an operation box, a sensor and the like, and stable operation of equipment is guaranteed through a compressor heating belt. The application problem in the low-temperature environment is effectively solved, the performance of a refrigerating system is improved, and the service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigerating unit technical field, especially is a kind of segmented condenser and refrigerating system for low temperature environment. BACKGROUND

[0002] In refrigerating unit, condenser is essential component, wherein air-cooled condenser is widely applied in various refrigerating systems due to the advantages of installation convenience, maintenance simplicity and the like without additional cooling water system. However, the heat dissipation performance of air-cooled condenser is significantly influenced by environmental working condition change.

[0003] In high-temperature environment, in order to effectively reduce condensing temperature and ensure efficient operation of refrigerating system, air-cooled condenser needs to be equipped with sufficient heat dissipation area and air volume. However, in low-temperature environment, it faces completely different problems. When air-cooled condenser is normally opened, it is easy to reach excessively low condensing temperature. In application process, excessively reduced condensing temperature not only causes insufficient heat recovery in system with heat recovery function, which affects effective utilization of energy, but also causes increased equipment downtime due to excessively low pressure and temperature. Frequent downtime not only reduces working efficiency of equipment, but also causes additional impact and abrasion on key components of equipment, such as compressor, which greatly affects service life and stability of equipment, and is extremely unfavorable for equipment operation.

[0004] Existing refrigerating system has obvious deficiency in dealing with these problems, and is difficult to stably and efficiently operate under different environmental working conditions. The utility model is based on in-depth research on above problems, and proposes a series of specific solutions to improve performance and reliability of refrigerating system in low-temperature environment. SUMMARY

[0005] The utility model aims at providing a segmented condenser and refrigerating system for low-temperature environment, and unique segmented condenser structure, such as expanded fin, reasonably distributed heat exchange copper pipe and header, significantly improves heat exchange efficiency, and provides basis for stable operation of refrigerating system. Each component is stably connected, which is beneficial to large-scale production and manufacturing, and structure design is convenient for implementation and control, and can effectively realize required functions of system.

[0006] In order to achieve the above object, the utility model is through the following technical scheme to realize: a kind of segmented condenser for low temperature environment, including heat exchanger body;Wherein: the heat exchanger body is provided with expansion fin;The left and right sides of the expansion fin are equipped with first side plate and second side plate respectively;Heat exchange copper pipe is provided on the heat exchanger body;The heat exchange copper pipe sequentially passes through the first side plate, expansion fin and the second side plate and forms a fixed whole together;The upper end of the first side plate is provided with heat exchanger inlet header;The middle part of the first side plate is provided with heat exchanger outlet header one;The lower end of the first side plate is provided with heat exchanger outlet header two;One end of the heat exchanger inlet header is connected with the heat exchange copper pipe;One end of the heat exchanger outlet header one is connected with the heat exchange copper pipe;One end of the heat exchanger outlet header two is connected with the heat exchange copper pipe.

[0007] Further as the improvement of the technical scheme of the utility model, the heat exchanger outlet header two is installed with solenoid valve.

[0008] Further as the improvement of the technical scheme of the utility model, the outside of the heat exchanger body is provided with cooling fan.

[0009] Further as the improvement of the technical scheme of the utility model, a kind of refrigeration system for low temperature environment, including cold air unit and outdoor air-cooled unit;Wherein: the outdoor air-cooled unit includes compressor, oil separator, liquid accumulator, gas-liquid separator and segmented condenser;The compressor is connected with one end of the oil separator by pipeline;The other end of the oil separator is connected with one end of the segmented condenser by pipeline;The other end of the segmented condenser is connected with one end of the liquid accumulator by pipeline;The other end of the liquid accumulator is connected with the cold air unit by pipeline;The cold air unit is connected with one end of the gas-liquid separator by pipeline;The other end of the gas-liquid separator is connected with the compressor by pipeline.

[0010] Further as the improvement of the technical scheme of the utility model, the cold air unit includes evaporator, two-stage heat exchanger, expansion valve and cold air fan;One end of the two-stage heat exchanger is connected with the liquid accumulator by pipeline;The other end of the two-stage heat exchanger is connected with the expansion valve and the evaporator by pipeline;The evaporator is connected with the gas-liquid separator by pipeline;The cold air fan is arranged on one side of the two-stage heat exchanger.

[0011] Further as improvement of the utility model technical scheme, the outdoor air-cooled unit further includes a filter, a sight glass, a stop valve one, a stop valve two, a high pressure sensor, a low pressure sensor, a temperature sensor one and a temperature sensor two; the filter and the sight glass are respectively installed on the connecting pipeline between the liquid accumulator and the secondary heat exchanger; the secondary heat exchanger is connected with the liquid accumulator through the stop valve one; the evaporator is connected with the gas-liquid separator through the stop valve two; the high pressure sensor is arranged at the outlet of the oil separator; the low pressure sensor is arranged at the outlet of the gas-liquid separator; the temperature sensor one is arranged at the inlet of the gas-liquid separator; and the temperature sensor two is arranged in the indoor unit where the sectional condenser is located.

[0012] Further as improvement of the utility model technical scheme, the air-cooled unit further includes a solenoid valve one and a solenoid valve two; the secondary heat exchanger is connected with the evaporator through the solenoid valve one; and the evaporator is connected with the liquid accumulator through the solenoid valve two.

[0013] Further as improvement of the utility model technical scheme, the outdoor air-cooled unit further includes an operation box; and the operation box is electrically connected with the air-cooled unit.

[0014] Further as improvement of the utility model technical scheme, the air-cooled unit further includes a temperature and humidity sensor, an operation screen and a junction box; the temperature and humidity sensor is installed in the indoor air-cooled unit to collect and transmit data; the operation screen is used for setting and inquiring parameters and states; and the junction box is connected to the control box on the outdoor unit side to read data and perform logical analysis for automatic control and adjustment.

[0015] Further as improvement of the utility model technical scheme, the compressor is provided with a heating belt.

[0016] The utility model has the following beneficial effects:

[0017] Structural optimization and function realization: the unique sectional condenser structure, such as expansion tight fin, reasonably distributed heat exchange copper pipe and header, can significantly improve heat exchange efficiency, and provide a basis for stable operation of the refrigeration system. The connection of each component is stable, which is beneficial to large-scale production and manufacturing, and the structural design is convenient for implementation and control, and can effectively realize the required functions of the system.

[0018] Solve the problem of operation failure: by setting the solenoid valve, sensor and various valves, the refrigerant flow, pressure and temperature can be accurately controlled. The problem of equipment shutdown due to too small pressure difference and too low pressure can be effectively avoided, and the continuous and stable operation of the equipment in a low temperature environment is ensured.

[0019] Improve the temperature and humidity regulation effect: the secondary heat exchanger, the cold air fan side fan and other components work together to optimize the refrigeration process. Solve the problem of low temperature of high pressure side refrigerant affecting indoor temperature and humidity regulation, ensure that the system can regulate the indoor temperature and humidity to the set range, meet the use requirements.

[0020] Intelligent and convenient operation: operation box, operation screen, temperature and humidity sensor and junction box and other configurations, realize the centralized control, parameter setting, state monitoring and automatic control adjustment of the system, convenient operation and management.

[0021] Ensure stable operation of equipment: compressor heating belt ensures normal start and operation of compressor in low temperature environment, prolongs service life of equipment, and further improves reliability of entire refrigeration system in low temperature environment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent through reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 The overall structure diagram of the segmented condenser for low temperature environment of the present application;

[0024] Figure 2 The side structure diagram of the segmented condenser for low temperature environment of the present application;

[0025] Figure 3 The structure frame diagram of the refrigeration system for low temperature environment of the present application.

[0026] In the drawings: 1-heat exchanger outlet header one; 2-heat exchanger outlet header one; 3-heat exchanger outlet header two; 4-first side plate; 5-tight fin; 6-second side plate; 7-heat exchange copper pipe; 8-radiation fan; 9-outlet air direction; 10-inlet air direction; 11-solenoid valve; 12-compressor; 13-oil separator; 14-segmented condenser; 15-liquid accumulator; 16-filter; 17-liquid sight glass; 18-stop valve one; 19-solenoid valve one; 20-solenoid valve two; 21-expansion valve; 22-evaporator; 23-secondary heat exchanger; 24-stop valve two; 25-gas-liquid separator; 26-high pressure sensor; 27-low pressure sensor; 28-temperature sensor one; 29-temperature sensor two; 30-operation box; 31-operation screen; 32-junction box; 33-temperature and humidity sensor; 34-cold air fan side fan; 100-heat exchanger body. DETAILED DESCRIPTION

[0027] The present application will be described in detail below with reference to the drawings and specific embodiments, which are illustrative embodiments and explanatory of the present application, but not as a limitation of the present application.

[0028] It should be noted that all directional indications, such as upper, lower, left, right, front, back, top, bottom, side, etc., are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0029] In the present application, unless otherwise specifically defined and limited, the term "connection" should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0030] In addition, in the present application, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features; in addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0031] The present application will be further described in detail below in combination with the drawings.

[0032] Please refer to Figure 1 and Figure 2The utility model provides a technical scheme: a kind of segmented condenser for low temperature environment, including heat exchanger body 100;Wherein: expansion fin 5 is provided on the heat exchanger body 100;The left and right sides of the expansion fin 5 are equipped with first side plate 4 and second side plate 6 respectively;Heat exchange copper pipe 7 is provided on the heat exchanger body 100;The heat exchange copper pipe 7 sequentially passes through first side plate 4, expansion fin 5 and second side plate 6 and forms a fixed whole jointly;The upper end of first side plate 4 is provided with heat exchanger inlet header 1;The middle part of first side plate 4 is provided with heat exchanger outlet header one 2;The lower end of first side plate 4 is provided with heat exchanger outlet header two 3;One end of heat exchanger inlet header 1 is connected with heat exchange copper pipe 7;One end of heat exchanger outlet header one 2 is connected with heat exchange copper pipe 7;One end of heat exchanger outlet header two 3 is connected with heat exchange copper pipe 7.It needs to be explained that the setting of expansion fin 5 increases the contact area of heat exchanger body 100 with ambient air, so that heat exchange can be carried out more effectively, and the heat exchange efficiency of condenser under low temperature environment is improved.Heat exchange copper pipe 7 sequentially passes through first side plate 4, expansion fin 5 and second side plate 6 and forms a fixed whole, and this structure design makes the structure of the whole condenser more stable, can adapt to various working conditions that may occur under low temperature environment, and reduces the risk of component loosening due to factors such as vibration.The heat exchanger inlet header 1 and heat exchanger outlet header provided on first side plate 4 provide reasonable path planning for the flow of refrigerant in the condenser, which helps to optimize the heat dissipation process of refrigerant and further improve the condensing effect.

[0033] Specifically, in the embodiment, the heat exchanger outlet header two 3 is installed with electromagnetic valve 11.It needs to be explained that electromagnetic valve 11 can accurately control the refrigerant flow from heat exchanger outlet header two 3 according to the operation demand of refrigeration system.In low temperature environment, different working conditions may require different refrigerant flow to ensure the efficient operation of condenser, and electromagnetic valve 11 can realize such flexible adjustment, which helps to improve the overall performance and stability of refrigeration system.By accurately controlling refrigerant flow, unnecessary refrigerant circulation is avoided, so that the energy consumption of compressor and other equipment is reduced, and the purpose of energy saving and consumption reduction is achieved.Meanwhile, reasonable refrigerant flow control also helps to prolong the service life of equipment.

[0034] Specifically, in the embodiment, the heat exchanger body 100 is provided with a cooling fan 8 on the outside. It should be noted that the cooling fan 8 can accelerate the flow speed of the air around the heat exchanger body 100, so that more cold air exchanges heat with the heat exchanger body 100, thereby significantly improving the cooling effect. In a low-temperature environment, although the ambient temperature is low, the heat dissipation is actively strengthened by the cooling fan 8, which can further improve the heat exchange efficiency of the condenser and ensure that the refrigeration system can operate stably. Even in the case of low ambient wind speed or poor ventilation conditions at the installation location of the condenser, the cooling fan 8 can ensure sufficient air flow, so that the condenser can maintain good heat dissipation performance under various working conditions.

[0035] With reference to Figure 3 Specifically, in the embodiment, a refrigeration system for low-temperature environment includes a cold air unit and an outdoor air-cooled unit; wherein: the outdoor air-cooled unit includes a compressor 12, an oil separator 13, a liquid accumulator 15, a gas-liquid separator 25 and a segmented condenser 14; the compressor 12 is connected to one end of the oil separator 13 through a pipeline; the other end of the oil separator 13 is connected to one end of the segmented condenser 14 through a pipeline; the other end of the segmented condenser 14 is connected to one end of the liquid accumulator 15 through a pipeline; the other end of the liquid accumulator 15 is connected to the cold air unit through a pipeline; the cold air unit is connected to one end of the gas-liquid separator 25 through a pipeline; the other end of the gas-liquid separator 25 is connected to the compressor 12 through a pipeline. It should be noted that the system integrity: this architecture organically combines each key component to form a complete refrigeration cycle system. Each component has clear division of labor and works cooperatively to ensure that the refrigeration system can operate stably and efficiently in a low-temperature environment. The compressor 12 compresses low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas, which enters the segmented condenser 14 after being separated from lubricating oil by the oil separator 13. In the condenser, the refrigerant is cooled and condensed into a liquid, which is stored in the liquid accumulator 15, then enters the cold air unit for evaporation refrigeration, and finally the gas-liquid separator 25 separates the unevaporated liquid to ensure that only gaseous refrigerant returns to the compressor 12, optimizing the circulation process of the refrigerant in the system and improving the refrigeration efficiency.

[0036] Specifically, in the embodiment, the air-cooled chiller unit comprises an evaporator 22, a two-stage heat exchanger 23, an expansion valve 21 and an air-cooled chiller side fan 34; one end of the two-stage heat exchanger 23 is connected to the liquid accumulator 15 through a pipeline; the other end of the two-stage heat exchanger 23 is connected to the expansion valve 21 and the evaporator 22 through a pipeline; the evaporator 22 is connected to the gas-liquid separator 25 through a pipeline; and the air-cooled chiller side fan 34 is arranged on one side of the two-stage heat exchanger 23. It should be noted that the two-stage heat exchanger 23 further cools the refrigerant, so that the temperature of the refrigerant entering the evaporator 22 is lower, thereby increasing the refrigeration temperature difference of the evaporator 22 and improving the refrigeration effect of the evaporator 22. The air-cooled chiller side fan 34 accelerates the flow of air around the two-stage heat exchanger 23, strengthens the heat exchange process, and helps to improve the refrigeration efficiency of the entire air-cooled chiller unit. The expansion valve 21 can accurately adjust the flow of refrigerant entering the evaporator 22 according to the load change of the evaporator 22, so that the evaporator 22 can operate efficiently under different working conditions, accurately adjust the refrigeration capacity, and meet different refrigeration requirements in low-temperature environments.

[0037] Specifically, in the embodiment, the outdoor air-cooled chiller unit further comprises a filter 16, a sight glass 17, a stop valve one 18, a stop valve two 24, a high-pressure sensor 26, a low-pressure sensor 27, a temperature sensor one 28 and a temperature sensor two 29; the filter 16 and the sight glass 17 are respectively installed on the connecting pipelines between the liquid accumulator 15 and the two-stage heat exchanger 23; the two-stage heat exchanger 23 is connected to the liquid accumulator 15 through the stop valve one 18; the evaporator 22 is connected to the gas-liquid separator 25 through the stop valve two 24; the high-pressure sensor 26 is arranged at the outlet of the oil separator 13; the low-pressure sensor 27 is arranged at the outlet of the gas-liquid separator 25; the temperature sensor one 28 is arranged at the inlet of the gas-liquid separator 25; and the temperature sensor two 29 is arranged in the indoor unit where the segmented condenser 14 is located. It should be noted that the filter 16 can filter out impurities in the refrigerant, prevent impurities from entering components such as the air-cooled chiller unit, avoid blocking the pipeline and damaging the equipment, and protect the normal operation of the refrigeration system and the service life of the equipment. The sight glass 17 is used to observe the flow state of the refrigerant and whether there are air bubbles and the like, so that the operating personnel can timely understand the system operating condition, so as to carry out necessary maintenance and adjustment. The stop valve one 18 and the stop valve two 24 can be used to cut off or adjust the flow of refrigerant in the corresponding pipeline, so as to facilitate the maintenance and repair of the equipment. The high-pressure sensor 26, the low-pressure sensor 27, the temperature sensor one 28 and the temperature sensor two 29 can monitor the pressure and temperature parameters at different positions of the system in real time, provide accurate data for the control system, realize accurate control and protection of the refrigeration system, and take measures in time to prevent equipment damage when the system parameters are out of the normal range.

[0038] Specifically, in the embodiment, the air-cooled unit further comprises a solenoid valve one 19 and a solenoid valve two 20; the secondary heat exchanger 23 is connected with the evaporator 22 through the solenoid valve one 19; the evaporator 22 is connected with the liquid accumulator 15 through the solenoid valve two 20. It should be noted that the solenoid valve one 19 and the solenoid valve two 20 can flexibly control the flow direction of the refrigerant between the secondary heat exchanger 23, the evaporator 22 and the liquid accumulator 15 according to the operating conditions and control requirements of the refrigeration system. For example, under different load conditions, by controlling the opening and closing of the solenoid valve, the circulation path of the refrigerant can be adjusted, the performance of the refrigeration system can be optimized, and the adaptability and operating efficiency of the system can be improved. By precisely controlling the flow direction of the refrigerant, the invalid circulation of the refrigerant is avoided, the energy consumption is reduced, and energy-saving operation is realized. At the same time, reasonable adjustment of the flow direction of the refrigerant helps to keep the working state of each component of the system in the best range, prolonging the service life of the equipment.

[0039] Specifically, in the embodiment, the outdoor air-cooled unit further comprises an operation box 30; the operation box 30 is electrically connected with the air-cooled unit. It should be noted that the operation box 30 provides an operation platform for the operator to centrally control and monitor the air-cooled unit. Through the operation box 30, the operator can conveniently start, stop and set parameters of the air-cooled unit, and can also obtain the running state information of the air-cooled unit in real time, realizing convenient management of the entire refrigeration system. The operation box 30 is electrically connected with the air-cooled unit, which is convenient for connecting to an automatic control system, realizing automatic operation and remote monitoring of the refrigeration system, improving the intelligent degree and management efficiency of the system, and reducing the workload and errors of manual operation.

[0040] Specifically, in the embodiment, the air cooler further comprises a temperature and humidity sensor 33, an operation screen 31 and a junction box 32. The temperature and humidity sensor 33 is installed in the indoor unit of the air cooler to collect and transmit data. The operation screen 31 is used to set and query parameters and states. The junction box 32 is connected to the control box of the outdoor unit to read data and perform logical analysis for automatic control and adjustment. It should be noted that the temperature and humidity sensor 33 collects the temperature and humidity data of the indoor unit of the air cooler in real time and transmits the data to the control system, so that the refrigeration system can automatically adjust the operating parameters according to the changes of the actual environmental temperature and humidity, to achieve better refrigeration effect and energy saving purpose. The operation screen 31 provides an intuitive and convenient operation interface for the operator, which facilitates the operator to set various parameters and query the equipment running state, and improves the convenience of operation and the monitorability of the system. The junction box 32 connects the air cooler with the control box of the outdoor unit to realize data reading and logical analysis, thereby realizing automatic control and adjustment of the refrigeration system. Through analysis and processing of the collected data, the control system can automatically adjust the operating parameters of the refrigeration system according to the actual situation, so that the system can always maintain the best operating state, and the stability and reliability of the system are improved.

[0041] Specifically, in the embodiment, the compressor 12 is provided with a heating belt. It should be noted that the low-temperature start-up and operation are ensured: in a low-temperature environment, the lubricating oil in the compressor 12 may become viscous, affecting the start-up and normal operation of the compressor 12. The heating belt can preheat the compressor 12, increase the temperature of the lubricating oil, reduce its viscosity, and ensure that the compressor 12 can start smoothly in a low-temperature environment and operate normally. This helps to improve the reliability and stability of the refrigeration system in a low-temperature environment, and reduces the risk of equipment failure caused by low temperature. By ensuring the good operating state of the compressor 12 in a low-temperature environment, wear and damage of the compressor 12 caused by difficult start-up in low temperature are avoided, thereby prolonging the service life of the compressor 12 and the entire refrigeration system.

[0042] It should be noted that:

[0043] The cooling fan 8 is an external independent component. When powered on, the air with relatively low temperature passes through the condenser heat exchanger from the air inlet direction 10 side to the air outlet direction 9 side, and the air with relatively high temperature is discharged from the condenser heat exchanger, completing the heat exchange process.

[0044] The electromagnetic valve 11 can control the opening and closing of the outlet header 3 of the heat exchanger by being powered on or off.

[0045] The air-cooled segmented condenser does not need to increase other components when applied in low-temperature environment, and the condenser heat exchange circuit is divided into sub-circuit application, which is convenient for controlling the heat exchange amount of the return air, and the comprehensive control of the fan can achieve more stable effect in lower environment application, without increasing other structural components to increase the cost.

[0046] The air-cooled condenser is usually of one-out-one-in type, and the air-cooled segmented condenser is of one-in-two-out type for wider range of temperature and humidity application, which is more conducive to system control.

[0047] The air-cooled segmented condenser, compressor 12 (with heating belt), oil separator 13, liquid reservoir 15, filter 16, sight glass 17, stop valve one 18 and stop valve two 24, gas-liquid separator 25, high-pressure sensor 26, low-pressure sensor 27, temperature sensor one 28, temperature sensor two 29, and control box in the sheet metal box body are connected by copper pipes to jointly constitute an outdoor air-cooled unit with adjustable condensing temperature for low-temperature environment application.

[0048] The indoor unit side is composed of electromagnetic valve one 19, electromagnetic valve two 20, two-stage heat exchanger 23, external balance expansion valve 21, evaporator 22, and cooling fan 8 in the sheet metal box body connected by copper pipes to jointly constitute an indoor temperature and humidity adjusting cooling fan. The cooling fan system and the outdoor air-cooled unit are connected by copper pipes through stop valve one 18 and stop valve two 24. The connected complete equipment is filled with refrigerant, and the equipment runs through the copper pipes connected to the outside to adjust the temperature and humidity.

[0049] The cooling fan side is provided with temperature and humidity sensor 33, operation screen 31, and junction box 32 connected to the control box of the outdoor unit side for data reading and logical analysis for automatic control adjustment. The temperature and humidity sensor 33 is installed in the indoor cooling fan side for data collection and transmission, and the operation screen 31 is used for setting and querying parameters and states.

[0050] When the system is running normally, the refrigerant is compressed by the compressor 12 and separated by the oil separator 13, and is a high-temperature and high-pressure gaseous refrigerant. The refrigerant exchanges heat with outdoor air through the air-cooled segmented condenser, enters the heat exchanger inlet header 1, and is output as a medium-temperature and high-pressure gas-liquid mixed refrigerant through the electromagnetic valve 11 to the reservoir 15 under the action of the air cooling fan 8. The air-cooled segmented condenser is in full open mode, and sufficient heat exchange area and air volume are used to remove heat to reduce the temperature of the refrigerant. The refrigerant after cooling enters the cold air fan side, passes through the electromagnetic valve 1 or the electromagnetic valve 2, and then passes through the expansion valve 21 to become a low-temperature and low-pressure liquid refrigerant. The refrigerant exchanges heat with indoor air through the heat exchanger under the action of the fan motor. The control system calculates and controls the opening and closing of the valve based on the data collected by the sensor, so that the refrigerant enters different heat exchange components. One is to exchange heat with the two-stage heat exchanger 23 before the expansion valve 21, and the other is to exchange heat with the evaporator 22 after the expansion valve 21. Different combinations of the two modes can flexibly adjust the temperature and humidity of indoor air.

[0051] When the outdoor temperature is in the spring and autumn transition season, the air heat transfer efficiency is high, and the outdoor condenser is in full open mode. The temperature and pressure of the refrigerant on the high-pressure side of the refrigeration system are reduced. The temperature and pressure of the refrigerant can be adjusted by the fan motor based on the temperature sensor and the pressure sensor in the control system, so that the refrigerant entering the cold air fan side can exchange heat to achieve temperature and humidity adjustment.

[0052] When the outdoor temperature is 5 degrees or below in winter, the air heat transfer efficiency with the outdoor condenser is further improved, and the high-pressure pressure and temperature of the refrigerant are further reduced. When the temperature is too low, the following problems may occur: 1. The equipment cannot run due to small pressure difference and low pressure when the temperature and humidity adjustment range value is not reached; 2. When the temperature of the refrigerant on the high-pressure side is too low, the indoor temperature and humidity adjustment is affected, and the heat brought in is too low to achieve the purpose of adjustment. At this time, the equipment collects data through the temperature sensor, and combines the data of the refrigeration system pressure sensor. The system closes the electromagnetic valve 11 of the air-cooled segmented condenser, reduces the heat exchange circuit and area of the condenser, and keeps the refrigerant in the system at a proper required temperature and pressure value. The refrigeration system circulates normally, the indoor temperature and humidity can be effectively adjusted and controlled to meet the use requirements, and the stability and safety are ensured.

[0053] The technical solutions provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the embodiments of the present application are described by applying specific examples; the above description of the embodiments is only applicable to helping understand the principles of the embodiments of the present application; meanwhile, for the general technical personnel in the art, the embodiments of the present application will have changes in the specific implementation manners and application ranges, and the above description should not be understood as the limitation of the embodiments of the present application.

Claims

1. A segmented condenser for cryogenic environments comprising a heat exchanger body; characterized in that: The heat exchanger body is provided with expansion fins; the left and right sides of the expansion fins are respectively provided with first side plates and second side plates; the heat exchanger body is provided with heat exchange copper pipes; the heat exchange copper pipes pass through the first side plates, the expansion fins and the second side plates in sequence to form a fixed whole; the upper end of the first side plate is provided with a heat exchanger inlet header; the middle part of the first side plate is provided with a heat exchanger outlet header one; the lower end of the first side plate is provided with a heat exchanger outlet header two; one end of the heat exchanger inlet header is connected with the heat exchange copper pipes; one end of the heat exchanger outlet header one is connected with the heat exchange copper pipes; one end of the heat exchanger outlet header two is connected with the heat exchange copper pipes.

2. A segmented condenser for cryogenic environments according to claim 1, characterized in that: The heat exchanger outlet header two is provided with an electromagnetic valve.

3. A segmented condenser for cryogenic environments as defined in claim 1, characterized in that: The outer side of the heat exchanger body is provided with a heat dissipation fan.

4. A refrigeration system for low temperature environment, comprising a cold air unit and an outdoor air-cooled unit; characterized in that: The outdoor air-cooled chiller unit comprises a compressor, an oil separator, a liquid accumulator, a gas-liquid separator and the segmented condenser according to any one of claims 1-3; the compressor is connected with one end of the oil separator through a pipeline; the other end of the oil separator is connected with one end of the segmented condenser through a pipeline; the other end of the segmented condenser is connected with one end of the liquid accumulator through a pipeline; the other end of the liquid accumulator is connected with the air-cooled chiller unit through a pipeline; the air-cooled chiller unit is connected with one end of the gas-liquid separator through a pipeline; the other end of the gas-liquid separator is connected with the compressor through a pipeline.

5. A refrigeration system for a cryogenic environment as claimed in claim 4, wherein: The air-cooled chiller unit comprises an evaporator, a secondary heat exchanger, an expansion valve and a chiller side fan; one end of the secondary heat exchanger is connected with the liquid accumulator through a pipeline; the other end of the secondary heat exchanger is connected with the expansion valve and the evaporator through a pipeline; the evaporator is connected with the gas-liquid separator through a pipeline; the chiller side fan is arranged on one side of the secondary heat exchanger.

6. A refrigeration system for a cryogenic environment as claimed in claim 5, wherein: The outdoor air-cooled chiller unit further comprises a filter, a sight glass, a stop valve one, a stop valve two, a high-pressure sensor, a low-pressure sensor, a temperature sensor one and a temperature sensor two; the filter and the sight glass are respectively arranged on the connecting pipelines between the liquid accumulator and the secondary heat exchanger; the secondary heat exchanger is connected with the liquid accumulator through the stop valve one; the evaporator is connected with the gas-liquid separator through the stop valve two; the high-pressure sensor is arranged at the outlet of the oil separator; the low-pressure sensor is arranged at the outlet of the gas-liquid separator; the temperature sensor one is arranged at the inlet of the gas-liquid separator; the temperature sensor two is arranged in the indoor unit where the segmented condenser is arranged.

7. A refrigeration system for use in a cryogenic environment according to claim 5, wherein: The air-cooled chiller unit further comprises an electromagnetic valve one and an electromagnetic valve two; the secondary heat exchanger is connected with the evaporator through the electromagnetic valve one; the evaporator is connected with the liquid accumulator through the electromagnetic valve two.

8. The refrigeration system for use in a cryogenic environment of claim 4, wherein: The outdoor air-cooled chiller unit further comprises an operation box; the operation box is electrically connected with the air-cooled chiller unit.

9. A refrigeration system for a cryogenic environment as claimed in claim 8, wherein: The cold air unit further comprises a temperature and humidity sensor, an operation screen and a junction box; the temperature and humidity sensor is installed in the indoor of the cold air unit to collect and transmit data; the operation screen is used for setting and inquiring parameters and states; the junction box is connected to a control box on the outdoor unit side to read data and analyze logic for automatic control and adjustment.

10. The refrigeration system for use in a cryogenic environment of claim 4, wherein: The compressor is provided with a heating belt.

Images