Variable-flow single-working-medium sharing heat exchanger overlapping heat pump system
A technology of heat pump system and heat exchanger, which is applied in the direction of fluid circulation arrangement, lighting and heating equipment, and compressor with reversible cycle, etc., which can solve the problems of complex system and hard-to-change fluid flow control, etc., and achieve simple system structure , Easy to adjust the energy between stages, the effect of simple system
Inactive Publication Date: 2016-07-20
河北航研制冷设备有限公司
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Problems solved by technology
However, since the low-temperature working medium is in a supercritical state at room temperature, an expansion vessel is usually installed at the low-temperature stage, the system is complex and it is difficult to realize variable working medium flow control
Method used
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Embodiment 1
[0024] figure 1 It is a schematic diagram of a cascaded heat pump system with a variable flow single working medium sharing the first heat exchanger and the second heat exchanger of the present invention, including multiple sets of compressor units connected in parallel, the first heat exchanger 4, the condensing evaporator 6, the second Heat exchanger 7, first throttling valve 5-1 and second throttling valve 5-2, each compressor group includes compressor 1, four-way reversing valve 2, first solenoid valve 3-1, second solenoid valve Valve 3-2, third solenoid valve 3-3, fourth solenoid valve 3-4, the exhaust end of the compressor 1 is connected to the first interface 2-1 of the four-way reversing valve, the compressor suction connected to the third port 2-3 of the four-way reversing valve, and the first solenoid valve 3-1 is connected in parallel with the second solenoid valve 3-2 to the second port of the four-way reversing valve 2-2 connection, the other end of the first sol...
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The invention discloses a variable-flow single-working-medium sharing heat exchanger overlapping heat pump system. Each compressor set of the heat pump system comprises a compressor, a four-way reversing valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve, wherein the exhaust end of the compressor is connected with a first connector of the four-way reversing valve; the air suction end of the compressor is connected with a third connector of the four-way reversing valve; one end of the first electromagnetic valve is in parallel connection with one end of the second electromagnetic valve and then connected with a second connector of the four-way reversing valve; and the third electromagnetic valve is in parallel connection with one end of the fourth electromagnetic valve and then connected with a fourth connector of the four-way reversing valve. The other ends of the first electromagnetic valves are in parallel connection and then connected with a second connector of a condensation evaporator through a first heat exchanger and a first throttle valve. The other ends of the second electromagnetic valves are in parallel connection and then connected with a third connector of the condensation evaporator. The other ends of the third electromagnetic valves are in parallel connection and then connected with a first connector of the condensation evaporator. The other ends of the fourth electromagnetic valves are in parallel connection and then connected with a fourth connector of the condensation evaporator through a second heat exchanger and a second throttle valve. The overlapping heat pump system is composed of a single working medium, and an expansion container and other devices are not used, so that the system structure is simple.
Description
technical field [0001] The invention relates to a heat pump unit, more specifically, to a multi-head cascade heat pump cycle system, which is used to improve the efficiency of the cascade heat pump system and to regulate the flow rate of the heat pump system. Background technique [0002] The single-stage compression heat pump system is not suitable for heat pump systems with a compression ratio (ratio of exhaust pressure to suction pressure) greater than 12 due to the limitation of the suction and discharge compression ratio of the compressor. In the prior art, when the compression ratio is greater than 12, a two-stage compression heat pump system is usually used. The two-stage compression heat pump unit can be driven by a motor, or it can be realized by combining multiple heads. However, the high and low pressure of these two methods are interoperable, and the oil return problem of the compressor is not easy to solve. [0003] Cascade heat pump systems are also a good so...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F25B13/00F25B41/04F25B41/06F25B31/00F25B41/20F25B41/31F25B41/34F25B41/37
CPCF25B13/00F25B31/004F25B2400/19F25B2313/02741F25B41/34F25B41/20F25B41/37F25B41/30F25B41/31Y02B30/70
Inventor 杨永安严雷郑标帝李瑞申
Owner 河北航研制冷设备有限公司