Frequency conversion multi-connection type central air conditioner
A central air-conditioning, multi-connected technology, applied in air-conditioning systems, heating methods, high-efficiency adjustment technology, etc., can solve the problems of high unit cost, frequent operation, fluctuations in operation, etc., and achieve the effect of wide range of use, reliable performance and simple installation.
Inactive Publication Date: 2013-10-30
广州科汇成科技服务有限公司
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Problems solved by technology
The unit not only needs to realize the problem of long-distance refrigerant transportation, but also needs to realize the matching and adapting problem of the partial load system. If the system matching is not very good, then the adjustment of the whole system will be complicated, and the operation will fluctuate frequently, resulting in weaknesses such as poor stability.
On the other hand, due to the current level of the control scheme, the requirements for the system are higher. If some sensing components are added, the cost of the unit will be higher and the control logic will be more complicated. Regarding this point, several foreign manufacturers have comparative Advanced technology, and the operation regulation is relatively stable, but there is no better solution in China
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Embodiment Construction
[0012] As shown in the figure, it is a structural schematic diagram of this embodiment. The variable frequency multi-connected central air conditioner is connected in turn with a fixed frequency compressor 1, a variable frequency compressor 11, a high pressure switch 2, an oil separator 3, a four-way valve 5, a condenser 6, an expansion valve component 7, a liquid reservoir 9, Heat exchanger 13, ball valve 12, indoor unit 10, four-way valve 5, heat exchanger 13, low pressure switch 15. A liquid bypass solenoid valve 8 is connected between the expansion valve part and the heat exchanger, and an unloading pressure switch 4 and an air bypass solenoid valve 14 are connected between the oil separator and the heat exchanger.
[0013] The specific functions of each component are introduced as follows:
[0014] Liquid bypass solenoid valve: ① When the system is running under partial load, especially when the low-power indoor unit (such as 1HP, 1.5HP) is turned on alone, the phenomeno...
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The invention discloses a frequency conversion multi-connection type central air conditioner. Compressors, a high-voltage switch, an oil separator, a four-way valve, a condenser, an expansion valve component, a liquid accumulator, a heat exchanger, a ball valve, an indoor unit, a four-way valve, a heat exchanger and a low-pressure switch are sequentially connected through pipes. A liquid bypass solenoid valve is connected between the expansion valve component and the heat exchanger, an unloading pressure switch and a gas bypass solenoid valve are connected between the oil separator and the heat exchanger, the compressors comprise a constant frequency compressor and a frequency conversion compressor, and the constant frequency compressor and the frequency conversion compressor run in a parallel-connection mode. The frequency conversion compressor and the constant frequency compressor jointly adjust a system capacity. When a load is small, the frequency conversion compressor is started; when the load is added to a certain degree and is larger than a load of the frequency conversion compressor, the constant frequency compressor is controlled to be started according to a set mode, and frequency of the frequency conversion compressor begins to drop simultaneously. In the whole running process, the frequency conversion compressor is always at an optimal running frequency section.
Description
technical field [0001] The invention belongs to the technical field of central air conditioners, in particular to a frequency conversion multi-connected central air conditioner. Background technique [0002] The multi-connected central air-conditioning unit is an all-air-air system composed of one outdoor unit and multiple direct evaporative indoor units. Since the heart of the unit uses an inverter compressor, it can realize the stepless adjustment function of cooling capacity. The capacity of the equipped indoor unit can be freely matched within the range of 50-130% of the total capacity, and there are many types and forms of indoor units, which brings a lot of convenience to the design and selection, but at the same time, in order to meet the requirements of different loads, the system The structure puts forward higher requirements. The unit not only needs to realize the problem of long-distance refrigerant transportation, but also needs to realize the matching and adapt...
Claims
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IPC IPC(8): F24F3/00F25B31/00
CPCY02B30/741Y02B30/70
Inventor 刘安庆
Owner 广州科汇成科技服务有限公司