Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is an assembled block type artificial skating rink, comprising: a refrigeration system (1), multiple liquid supply main pipes (42), and multiple gas return main pipes (41) located on the same circuit as the liquid supply main pipes. The multiple liquid supply main pipes converge at a liquid supply main pipe (32), and the multiple gas return main pipes converge at a gas return main pipe (31). The liquid supply main pipe communicates with a refrigeration liquid output end of the refrigeration system via at least one liquid supply riser (22), and the gas return main pipe communicates with a gas recovery end of the refrigeration system via at least one gas return riser (21). The gas return main pipes are each respectively sheathed on the liquid supply main pipes to form multiple groups of sheathed main pipes. The artificial skating rink is split into different block-shaped areas, each area independently being provided with a freezing discharge pipe and a sheathed collection pipe connected with the sheathed main pipes. A refrigeration liquid control valve set is mounted on the liquid supply main pipes, and a gas control valve set is mounted on the gas return main pipes. According to the requirements of use, the skating rink can independently freeze the required area, thereby obtaining the required form for the surface of the ice, effectively saving on energy resources.
A: A debugging assembly. The debugging assembly comprises: a first main pipeline (10) used for communicating with an indoor unit pipeline and a second main pipeline (20) used for communicating with an outdoor unit pipeline; and branch pipelines (30) enabling communication between the first main pipeline (10) and the second main pipeline (20), and provided with throttling assemblies and switch valves (50), the switch valves (50) being configured to control the connection and disconnection of the branch pipelines (30), wherein there are multiple branch pipelines (30), and some of throttling parameters of the throttling assemblies in the multiple branch pipelines (30) are the same. In a test process, vacuumizing is performed once, multiple branch pipelines (30) are used to perform tests by using throttling parameters of a plurality of different throttling assemblies, and in a test process of any one branch pipeline (30), the other branch pipelines (30) are closed by means of the switch valves (50), so as to prevent a test result of the branch pipeline (30) to be tested from being interfered; and the number of times of vacuumizing is reduced, thereby shortening a test period and increasing the test efficiency.
B: A gas supply system of a gas bearing for a compressor, an operation method and a refrigeration system. The gas supply system of a gas bearing for a compressor comprises: a first compressor (1) and a refrigeration cycle path in which the first compressor (1) is located, the gas bearing being provided on the first compressor (1); a gas supply tank (3); a gas intake pipe (4), which communicates the gas supply tank (3) with a first portion of the refrigeration cycle path; a gas outlet pipe (5), which communicates the gas supply tank (3) with the first compressor (1); a return pipe (6), which communicates the gas supply tank (3) with a second portion of the refrigeration cycle path; and a regulating valve (61), which is provided in the return pipe (6), the opening of the regulating valve (61) being adjustable so as to regulate the gas flow within the return pipe (6). In a normally stable operating state of the first compressor (1), the gas pressure at the first portion is greater than the gas pressure at the second portion. The gas pressure within a gas supply tank is regulated by means of a regulating valve on a return pipe so as to provide a stable pressure gaseous refrigerant to a gas bearing, the structure is simple, operation and control are convenient, and reliability is high.
C: An assembled refrigeration device, used for solving the technical problems of existing skating rinks having poor construction quality and ice-making capabilities, the device comprising refrigeration modules. The refrigeration modules comprise a housing (1) and refrigerant conveying pipelines (2); a heat transmission combined structure is formed by the refrigerant conveying pipelines (2) and the housing (1); outward heat conduction and refrigeration are produced by means of the housing (1), and the housing (1) is provided with a splicing device thereon. The multiple refrigeration modules are spliced and combined by means of the splicing devices, and a refrigeration face is formed on the top face of the housing (1) after splicing and combining. The construction work procedures of the skating rink are simplified, and thus the construction speed and quality thereof as well as the ice making capabilities are improved.
D: A combined cascade refrigeration air-conditioning system and the control method therefor, characterized in that a cold-source system of the cascade air-conditioner is comprised of two or more outdoor combined refrigeration modules (1) arranged on the outdoor side of the cascade air-conditioning system. The outdoor combined refrigeration module (1) is comprised of a vapour-compressing refrigeration circulation circuit for a first refrigerant and a circulation circuit for a second refrigerant. One or more indoor air-cooler modules (3) are provided on the indoor side. A storage and transport unit (2) for the second refrigerant is connected between the outdoor combined refrigeration module (1) and the indoor air-cooler module (3) via a liquid collecting pipe (4), a liquid supply main pipe (5) and an air returning main pipe (6) so as to constitute a closed circulation system. The air-conditioning system configures the number of indoor and outdoor modules based on the designed thermal load of the object to be air-conditioned, regulates the refrigerating capacity precisely, and meets the thermal control requirements of all kinds of data rooms and electronic apparatuses; the system can make full use of the positive indoor-outdoor temperature difference in winter and transition seasons to discharge heat at a low cost, thereby achieving the energy-saving of the air conditioning system.
Answer: C