Heat pump unit and multifunctional mode control method thereof
A heat pump unit, mode control technology, applied in the operation mode of the machine, the combination of heating and cooling, the refrigerator, etc., can solve the problems of high cost, inconvenient use, complex water system control scheme, etc.
Pending Publication Date: 2017-10-20
CARRIER CORP
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Problems solved by technology
At the same time, this kind of heat pump unit will also lead to a more complicated water system control scheme and occupy a huge space for equipment installation
In addition to the high cost of parts and components, this also increases the complexity of pipeline layout and labor costs; and the more complex the system, the more professional and difficult its repair and maintenance are, which is very inconvenient for users to use
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[0040] Optionally, in order to avoid the risk of freezing of the refrigeration heat exchanger 130 in the heating mode and to avoid the risk of refrigerant imbalance during mode switching, the heat pump unit further includes The fourth solenoid valve 174 between the second ends of 130; and the hot gas bypass branch; the hot gas bypass branch includes a first branch section connecting the air outlet of the compressor 110 and the second end of the refrigeration heat exchanger 130 , and the second branch section connecting the first end of the refrigeration heat exchanger 130 and the inlet of the throttling element 160 . In this embodiment, when the hot gas bypass mode is activated, the hot gas bypass branch is turned on, and the refrigerant circulates from the air outlet of the compressor 110 through the first branch section, the cooling heat exchanger 130 , and the second branch. Two branch sections, throttling element 160, first heat exchanger 150, flow path switching valve 120...
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The invention provides a heat pump unit which comprises a heat pump system. The heat pump system comprises a compressor, a refrigeration heat exchanger, a heating heat exchanger, a first heat exchanger, a flow path switching valve and restricting elements; flow paths of any two heat exchangers are provided with the restricting elements; a mode switching flow path is further included, wherein a first flow path, a second flow path and a third flow path are arranged, and all flow paths are controlled to be on or off so as to achieve different function modes; in the refrigeration mode, refrigerating fluid flows to an air sucking opening of the compressor through the flow path switching valve, the first heat exchanger, the first flow path and the refrigeration heat exchanger from an air outlet of the compressor; in the heating mode, the refrigerating fluid flows to the air sucking opening of the compressor through the flow path switching valve, the heating exchanger, the second flow path, the first heat exchanger and the flow path switching valve from the air outlet of the compressor; in the simultaneous refrigeration and heating mode, the refrigerating fluid flows to the air sucking opening of the compressor through the flow path switching valve, the heating heat exchanger, the third flow path of the mode switching flow path and the refrigeration heat exchanger from the air outlet of the compressor; a refrigeration water system exchanging heat with the refrigeration heat exchanger and a heating water system exchanging heat with the heating water exchanger are further included.
Description
technical field [0001] The present invention relates to a heat pump unit and its multi-functional mode control method, in particular to a heat pump unit with multiple functional modes such as cooling, heating, sanitary hot water supply and simultaneous cooling and heating / sanitary hot water supply and the like. Its multi-function mode control method. Background technique [0002] Heat pump units with four-pipe design are usually used in hospitals, hotels and other places. Among them, two pipelines are used for heating or providing sanitary hot water, while the other two pipelines can be used for cooling. This kind of heat pump unit can provide heating and cooling functions for different user terminals at the same time all year round, so as to provide a relatively better user experience. At the same time, this kind of heat pump unit will also lead to a more complicated water system control scheme and occupy a huge space for equipment installation. In addition to the high c...
Claims
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IPC IPC(8): F25B29/00F25B13/00F25B41/06F25B41/04F25B41/20F25B41/34
CPCF25B13/00F25B29/003F25B41/20F25B47/022F25B2700/1933F25B2700/2117F25B49/02F24H4/04F25B2313/0316F25B2400/0409F25B2400/24F25B2600/2501F25B2600/2513F25B2600/2519
Inventor 李海军陈洁陈健华申广玉
Owner CARRIER CORP