DE102004033061A1 - A method to utilise the pressure energy of a conventional refrigeration circuit has a piston pump and two shut-off valves replacing the expansion valve - Google Patents

Abstract

The compressor (Kompressor) drives the compressed refrigerant through a condenser (Waermetauscher) and an electromagnetic inlet valve (Einlass ventil) for the motorised piston (Kolbenmaschine) which expands the gaseous refrigerant to be passed to the evaporator. The electromagnetic valves are controlled by optic sensors to open the inlet valve and close the outlet valve following the top position of the piston, closes the inlet valve, expands the gas, opens the outlet valve to exhaust the expanded gas to the evaporator.

Description

Field of use:

The The invention relates to a system structure according to the preamble of claim 1.

Machinery, which generate a temperature gradient under energy expenditure: with the compression chiller the piston compressor or turbocompressor sucks a gas (ammonia, Freon, carbon dioxide) as a refrigerant It compresses it, where it heats up, and presses for liquefaction in the heat exchanger hot side (Condenser), the heat the environment gives off. The refrigerant flows then to the heat exchanger cold side (Evaporator) where it can relax; it takes heat from the On the outskirts. Then a new cycle follows. Principle refrigerator.

The Relaxation of the gas is effected by a nozzle. Dams in front of the nozzle the refrigerant is added high pressure, behind the nozzle the pressure is reduced.

Disadvantages of the state of the technique.

Previous Compression refrigeration systems, (whether in buildings, Car, industry) for air conditioning or cooling, or vice versa as a heat pump work, have a poor efficiency of high energy costs conditionally. The pressure energy is dissipated unused at the nozzle.

Object of the invention:

task The invention is to increase the efficiency of refrigerators by the stored pressure energy of the refrigerant during the Gas relaxation is converted into other energy and provided becomes.

Solution of the task:

The The object is achieved by a device having the features of the claim 1 solved.

Advantage of the invention:

One Good efficiency of a system increases the economic efficiency.

These Invention uses the available energy in a refrigeration system to drive her back to the drive, which increases the profitability.

It can ev. new application trap arise, the previously uneconomical are. Heat pumps are then the cheap alternative to building air conditioning.

compressor refrigeration systems need a lot of energy to pressure in a refrigerant circuit build.

These Pressure energy of the refrigeration cycle can while the discharge phase used mechanically and partly as energy back be won. The back The energy gained reduces the energy demand from the outside.

example Description a patent application

embodiments The invention are illustrated in the drawings and are in following closer described.

It demonstrate:

drawing 1: Schematic of a conventional refrigeration system

drawing 2: Scheme of a refrigeration system with piston engine

drawing 3: Scheme of a refrigeration system with multi-piston machines (alternative version)

A conventional refrigeration plant according to drawing 1 consists essentially of compressor, heat exchanger hot side, Expansion valve, heat exchanger cold side and refrigerant storage tanks.

The constructed according to drawing 1 apparatus forms a cycle by the compressor compresses gas. The compressed gas gives heat in the heat exchanger hot side from. In the expansion valve, this pressure is reduced again, so that the gas cools down. At the heat exchanger cold side takes the gas heat from the environment and flows back to the compressor. A new cycle begins.

Of the Compressor must constantly one Build up and maintain pressure. The energy applied for this is in the gas as pressure and heat. The Heat is degraded on the heat exchanger hot side. The pressure in conventional Facilities are degraded by high gas friction in the expansion valve.

My invention is to reduce the pressure via an engine (piston engine). The This structure causes the gas is not decompressed via a nozzle but via a motor that uses the pressure energy of the gas.

Of the Engine according to drawing 2 has an inlet and an outlet valve.

Short behind the top dead center, the inlet valve begins to open and can be compressed a defined amount Gas flow into the piston engine. Moving on the Piston relaxes this gas, but acts over the entire time of downward movement with his pressure forces on the piston.

Of the Piston sets the pressure forces in torque on the crankshaft (similar to gasoline engines).

During the now following upward movement is the exhaust valve all the time open. Of the Piston pushes the expanded gas out to top dead center.

At the T.D.C. includes the exhaust valve.

The On and off laßventile are electrically dependent the piston position controlled. Two photoelectric sensors detected the Position of the piston on the shaft.

The Signals from the photoelectric sensors go to a controller, which thus the Can control valves.

A Photocell for the inlet valve gives a signal to the controller at top dead center. After short Delay opens the Control the inlet valve to let in an optimal amount of gas.

After that includes she the valve again.

A additional photocell for the exhaust valve gives a signal at bottom dead center to the controller.

The Control opens the exhaust valve to top dead center, to decompressed gas to the cold side push out. The torque released at the engine may e.g. the compressor again supplied which therefore requires less external energy.

Claims (8)

Structure of a compressor refrigeration system, characterized in that an engine converts the pressure energy of the refrigerant into torque and feeds the compressor. Device according to claim 1, characterized that any Device capable of generating energy while reducing pressure, in the refrigerant circuit can be used instead of the motor. Device according to claim 1, characterized that the Engine forms an aggregate with the compressor. Device according to claim 1, characterized that engine and compressor are also designed as multi-piston machines. Device according to claim 1, characterized that engine or compressor are designed as a rotary valve variant. Device according to claim 1, characterized that this Inlet and outlet valve not electrically but mechanically or electronically controlled is. Device according to claim 1, characterized the existence Any gas (e.g., air) is used instead of the refrigerant. Device according to claim 1, characterized that a pressure relief valve As a safety element sits parallel to the engine to avoid dangerously high pressures.