阅读说明：本技术 一种直接热交换法量热器 (Calorimeter by direct heat exchange method ) 是由 梁丁浩 粱雷军 梁苗椿 高翔 汤礼江 高永丰 于 2019-11-28 设计创作，主要内容包括：一种直接热交换法量热器,属于制冷压缩机组的制冷量测试设备技术领域；本发明采用了电加热与制冷直接热交换平行法,绝热箱内设有制冷换热管束组,制冷换热管束组外设有翅片式换热片,在制冷换热管束组中配有U形电热器发热管,穿插在同一换热片上组成量热器换热传热管管组,并固定在量热器左墙板和量热器右墙板上,量热器盖板及量热器底座板与量热器左墙板和量热器右墙板连接固定成一个整体,存放在绝热箱体内,绝热层起到对外绝热保温的效果；不需要密闭的受压的容器,也不需用第二制冷剂,确保了量热器试验测定数据正确性,直接利用电加热器发出的热量来抵消压缩机的制冷量,实现对制冷压缩机的制冷量和输入功率进行测定。(A direct heat exchange method calorimeter belongs to the technical field of refrigerating capacity testing equipment of a refrigerating compressor unit; the invention adopts an electric heating and refrigeration direct heat exchange parallel method, a refrigeration heat exchange tube bundle group is arranged in a heat insulation box, fin type heat exchange fins are arranged outside the refrigeration heat exchange tube bundle group, U-shaped electric heater heating tubes are matched in the refrigeration heat exchange tube bundle group, and are inserted into the same heat exchange fins to form a calorimeter heat exchange heat transfer tube group which is fixed on a calorimeter left wall plate and a calorimeter right wall plate, a calorimeter cover plate and a calorimeter base plate are connected and fixed with the calorimeter left wall plate and the calorimeter right wall plate into a whole and stored in a heat insulation box body, and a heat insulation layer has the effect of heat insulation and heat preservation to the outside; the method has the advantages that a closed pressurized container is not needed, a second refrigerant is not needed, the correctness of the test and determination data of the calorimeter is ensured, the heat emitted by the electric heater is directly utilized to offset the refrigerating capacity of the compressor, and the refrigerating capacity and the input power of the refrigerating compressor are determined.)

1. A direct heat exchange calorimeter comprises a heat insulation box and a refrigeration heat exchange tube bundle group, and is characterized in that a heat exchange chamber is arranged in the heat insulation box, a heat insulation box cover is arranged on the upper side of the heat insulation box, heat insulation box liners are arranged on the inner wall of the heat insulation chamber and on the lower side of the heat insulation cover, a refrigerant pipe inlet is arranged on the left side of the heat insulation box cover, a refrigerant pipe outlet is arranged on the right side of the refrigerant pipe inlet, an electric heater inlet is arranged on the right side of the heat insulation box cover, heat insulation layers are arranged in the box body of the heat insulation box and the cover body of the heat insulation box cover, a calorimeter base plate is arranged at the bottom of the heat insulation chamber, a calorimeter left wallboard is arranged on the left upper side of the calorimeter base plate, a right wallboard is arranged on the right upper side of the calorimeter base plate, a calorimeter cover plate is arranged on the upper side between the left wallboard and the right wallboard, and a fin type heat, the snakelike interlude of refrigeration heat exchange tube bundle group is on the fin formula heat exchanger, the both ends of refrigeration heat exchange tube bundle group are equipped with the refrigerant respectively and advance pipe and refrigerant exit tube, the upper end that the refrigerant advances the pipe passes the refrigerant pipe import, the upper end of refrigerant exit tube passes the refrigerant pipe export, refrigeration heat exchange tube bundle group upper end all is equipped with the U-shaped electric heater heating tube with the outside of tip down, the both ends of U-shaped electric heater heating tube all are equipped with the electric heater terminal, the electric heater terminal is located the below of electric heater incoming line mouth, the electric heater terminal at U-shaped electric heater heating tube both ends all is equipped with the power supply line, the outside of calorimeter apron is located through the electric heater incoming line mouth to the other end of power.

2. The direct heat exchange calorimeter of claim 1, wherein the cooling heat exchange tube bundle and the U-shaped electric heater heating tube are inserted into the same fin-type heat exchanger plate, and the left calorimeter wall plate and the right calorimeter wall plate fix the cooling heat exchange tube bundle and the U-shaped electric heater heating tube inserted into the fin-type heat exchanger plate, respectively.

Technical Field

The invention belongs to the technical field of refrigerating capacity testing equipment of a refrigerating compressor unit, and particularly relates to a direct heat exchange method calorimeter.

Background

The calorimeter is a test method for measuring the refrigerating capacity and input power of the refrigerating compressor unit. At present, the performance of a refrigeration compressor set system is generally detected by a second refrigerant calorimeter method, and the refrigerating capacity and the input power of the refrigeration compressor set are measured. The second refrigerant calorimeter measures the cooling capacity by the second refrigerant calorimeter, and consumes the cooling capacity generated by the evaporator coil by using the heat generated by the electric heating tube inside the second refrigerant calorimeter arranged in the calorimeter. The second refrigerant calorimeter is a closed, pressure-tight, thermally insulated container, with an evaporator coil mounted in the calorimeter suspended from the upper portion of the container, and an electrically heated tube mounted at the bottom of the container and immersed by the second refrigerant. The first refrigerant circulates in the refrigerating system, the evaporation refrigeration is carried out in the evaporator coil of the second refrigerant calorimeter, the heat input into the second refrigerant calorimeter is mainly supplied by the heat of the electric heating pipe, the second refrigerant in the calorimeter is heated and vaporized, the formed second refrigerant steam is condensed on the outer surface of the top evaporator coil and returns to the liquid level again, the cold energy generated by the refrigerating system is indirectly consumed by the input heat through the intermediate medium of the second refrigerant, and when the thermodynamic state of the test system tends to be stable, the dynamic heat balance in the calorimeter is indicated. The existing calorimeter has the problems that the calorimeter needs a closed pressurized container, the calorimeter is easy to leak heat, so that test measurement data is not very accurate, the second refrigerant calorimeter is a device for indirectly measuring the refrigerating capacity of a compressor, the basic principle is that the refrigerating capacity of the compressor is offset by using the heat emitted by an electric heater, the running time is long, but the read data has large deviation and influences the measurement accuracy of the calorimeter.

Disclosure of Invention

The invention mainly solves the technical problems in the prior art and provides a direct heat exchange calorimeter.

The technical problem of the invention is mainly solved by the following technical scheme: a direct heat exchange calorimeter comprises a heat insulation box and a refrigeration heat exchange tube bundle group, wherein a heat exchange chamber is arranged in the heat insulation box, a heat insulation box cover is arranged on the upper side of the heat insulation box, heat insulation box inner containers are arranged on the inner wall of the heat insulation chamber and the lower side of the heat insulation cover, a refrigerant pipe inlet is arranged on the left side of the heat insulation box cover, a refrigerant pipe outlet is arranged on the right side of the refrigerant pipe inlet, an electric heater inlet is arranged on the right side of the heat insulation box cover, heat insulation layers are arranged in the box body of the heat insulation box and the cover body of the heat insulation box cover, a calorimeter base plate is arranged at the bottom of the heat insulation chamber, a calorimeter left wall plate is arranged on the left upper side of the calorimeter base plate, a calorimeter right wall plate is arranged on the right upper side of the calorimeter base plate, a calorimeter cover plate is arranged on the upper side between the left wall plate and the right wall plate, and, the snakelike interlude of refrigeration heat exchange tube bundle group is on the fin formula heat exchanger, the both ends of refrigeration heat exchange tube bundle group are equipped with the refrigerant respectively and advance pipe and refrigerant exit tube, the upper end that the refrigerant advances the pipe passes the refrigerant pipe import, the upper end of refrigerant exit tube passes the refrigerant pipe export, refrigeration heat exchange tube bundle group upper end all is equipped with the U-shaped electric heater heating tube with the outside of tip down, the both ends of U-shaped electric heater heating tube all are equipped with the electric heater terminal, the electric heater terminal is located the below of electric heater incoming line mouth, the electric heater terminal at U-shaped electric heater heating tube both ends all is equipped with the power supply line, the outside of calorimeter apron is located through the electric heater incoming line mouth to the other end of power.

Preferably, the refrigeration heat exchange tube bundle group and the heating tube of the U-shaped electric heater are inserted on the same fin type heat exchange plate, and the refrigeration heat exchange tube bundle group inserted on the fin type heat exchange plate and the heating tube of the U-shaped electric heater are fixed by the left wall plate of the calorimeter and the right wall plate of the calorimeter respectively.

The invention has the following beneficial effects: the invention adopts an electric heating and refrigeration direct heat exchange parallel method, a calorimeter refrigeration evaporator heat exchange coil pipe originally arranged in a pressure container is changed into a refrigeration heat exchange pipe bundle group arranged in a heat insulation box, a fin type heat exchange plate is arranged outside the refrigeration heat exchange pipe bundle group, a U-shaped electric heater heating pipe is arranged outside the refrigeration heat exchange pipe bundle group, the U-shaped electric heater heating pipe is inserted into the same fin type heat exchange plate to form a calorimeter heat exchange heat transfer pipe group and is fixed on a calorimeter left wall plate and a calorimeter right wall plate, a calorimeter cover plate and a calorimeter base plate are connected and fixed with the calorimeter left wall plate and the calorimeter right wall plate into a whole and are stored in the heat insulation box, and a heat insulation layer plays a role in external heat insulation and heat preservation; the method has the advantages that a closed pressurized container is not needed, a second refrigerant is not needed, the correctness of the test and determination data of the calorimeter is ensured, the heat emitted by the electric heater is directly utilized to offset the refrigerating capacity of the compressor, and the refrigerating capacity and the input power of the refrigerating compressor are determined. The refrigerating heat exchange tube bundle group and the heating tube of the U-shaped electric heater are inserted in series on the same fin type heat exchange sheet, so that the heat conduction is faster than that of the former, a pressure container is not needed, the leakage is not easy to occur, the safety is realized, the heat conductivity is good by using metal, and the volume can be reduced.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

in the figure: 1. a heat-insulating box; 2. a refrigeration heat exchange tube bundle group; 3. a heat exchange chamber; 4. a heat-insulating box cover; 5. an insulated cabinet liner; 6. a refrigerant tube inlet; 7. a refrigerant tube outlet; 8. a wire inlet of the electric heater; 9. a heat insulating layer; 10. a calorimeter base plate; 11. a calorimeter left wallboard; 12. a calorimeter right wall panel; 13. a calorimeter cover plate; 14. a fin type heat exchange fin; 16. a U-shaped electric heater heating tube; 17. a wiring terminal of the electric heater; 18. a refrigerant inlet pipe; 19. and a refrigerant outlet pipe.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.