Regulating mechanism for the refrigerant flow to the evaporator or refrigerating systems or heat pumps and expansion valves arranged in the refrigerant flow
First Claim
1. Regulating mechanism for the refrigerant flow to the evaporator of refrigerating systems or heat pumps with a compressor, which is arranged in the refrigerant circulation system and is connected or connectable, respectively, with the input of a condenser on the pressure side and with the output of an evaporator on the suction side and which is connectable with the output of said condenser or of a collector on the input side thereof via and expansion valve, an actuation motor for controlling the opening coefficient of said expansion valve, said output of the condenser being directly connected to said expansion valve or arranged as the output of said condenser, comprising a computer (10) for controlling said actuating motor (4) of the expansion valve (8) as a function of set values and as a function of the signals from sensors (5,6), which are sensitive to temperature and are arranged on a refrigerant line at the input and output sides of said evaporator (3) to indicate an input temperature (TE) and an output temperature (TA), said computer controlling the actuating motor such that in the event the input temperature (TE) at said evaporator lies below a threshold value, said expansion valve increasingly opens when the difference between the input and output temperature (TE,TA) at said evaporator exceeds a set value or such that said expansion valve increasingly closes when the difference falls below said set value, and closes completely when said input temperature signal (TE) lies above a threshold value.
1 Assignment
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Accused Products
Abstract
An expansion valve (8), which is arranged between the condenser (2) and the evaporator (3) in the pump medium circulation system of the heat pump and is continuously controllable, is regulated as a function of set values by means of a computer (10), in particular, while taking into account the evaporator input temperature measured by means of sensing devices (5) and/or the evaporator output temperature measured by means of sensing devices (6). Because of the regulating by means of computers, the control is suitable for different heat pumps and/or conditions of use without structurally altering the expansion valve (8).
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Citations
21 Claims
- 1. Regulating mechanism for the refrigerant flow to the evaporator of refrigerating systems or heat pumps with a compressor, which is arranged in the refrigerant circulation system and is connected or connectable, respectively, with the input of a condenser on the pressure side and with the output of an evaporator on the suction side and which is connectable with the output of said condenser or of a collector on the input side thereof via and expansion valve, an actuation motor for controlling the opening coefficient of said expansion valve, said output of the condenser being directly connected to said expansion valve or arranged as the output of said condenser, comprising a computer (10) for controlling said actuating motor (4) of the expansion valve (8) as a function of set values and as a function of the signals from sensors (5,6), which are sensitive to temperature and are arranged on a refrigerant line at the input and output sides of said evaporator (3) to indicate an input temperature (TE) and an output temperature (TA), said computer controlling the actuating motor such that in the event the input temperature (TE) at said evaporator lies below a threshold value, said expansion valve increasingly opens when the difference between the input and output temperature (TE,TA) at said evaporator exceeds a set value or such that said expansion valve increasingly closes when the difference falls below said set value, and closes completely when said input temperature signal (TE) lies above a threshold value.
Specification