RU2536448C2 - Heat pump unit for hot water supply or heating purposes - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: invention relates to energy saving, particularly, to hot water supply or heating. Coolant is evaporated in evaporator under effects of low-potential heat and, in gaseous state, is fed to compressor to be compressed and forced at high pressure to condenser to change in fluid state at releasing the energy to be directed to heat power supply. Then, coolant is directed to throttle to get its pressure reduced and to get back into condenser. In case heat output is insufficient, one more compressor is actuated to up the coolant pressure at evaporator, hence, to up the evaporator temperature. Note here that refrigeration output portion is used for preparation of drinking water at cleaning of tap water by frosting of ice lumps thereof with subsequent incomplete defrosting and application of purified water for drinking or for production of distilled water by cooling of exhaust vent air to dew point and condensation of water vapours contained therein.

EFFECT: variation of heat output over notably wide range.

2 cl, 1 dwg

Description

The invention relates to the field of energy conservation, in particular to providing hot water or heating.

Many different designs of heat pump installations are known, for example, a heat pump installation comprising an evaporator made in the form of a closed tank, equipped with water supply and drain pipes, a drive compressor connected to the vapor channel of the evaporator, and a condenser made in the form of a closed tank and equipped with a pipe with compressor (RF patent №2327934, F25B 1/053, 2008).

Closest to the proposed invention, the technical solution is a heat pump installation comprising an evaporator, a steam compressor with a drive in communication with the evaporator, and a condenser in communication with the compressor (AS USSR No. 1478000, class F25B 29/00, op. 1989 ), the principle of which is to transfer heat from a low potential source (prototype). The main disadvantage of this design is the ability to change the heat output of the installation only by changing the compressor operating modes.

The present invention solves the technical problem of ensuring changes in the heat production of the system in a fairly wide range.

The stated technical problem is solved in that the heat pump installation for hot water supply or heating contains at least two compressors operating on one common evaporator and one common condenser, so that the next compressor turns on when the temperature of the heated medium drops. In addition, part of the cooling capacity can be used to prepare drinking water by purifying tap water by freezing pieces of ice from it, followed by incomplete thawing and using purified water for drinking, while organizing the discharge of impurities remaining in the unfrozen part of the ice with the organization of thawing and discharge to the sewer, at the same time, pre-cooling of tap water is provided in the heat exchanger, and the heat energy taken from the condenser of the heat pump is used to heating hot water in a hot water supply or heating system. Or, part of the cooling capacity can be used to produce distilled water by cooling the exhaust ventilation air to the dew point and condensing the water vapor contained in it.

The proposed device allows you to solve the technical problem, because it allows you to adjust the heat output of the installation, not only due to the operating mode of the compressor, but also by changing the compressors operating at the same time.

The essence of the proposed technical solution is illustrated by the circuit shown in figure 1. The evaporator 1, several compressors 2, the condenser 3 and the choke 4 are combined into a single hydraulic circuit by pipeline 5, through which the refrigerant circulates.

The principle of operation of the present invention is as follows: on the evaporator 1, the refrigerant evaporates under the action of a source of low potential heat and enters the compressor 2 in a gaseous state, where it is compressed and supplied under high pressure to the condenser 4, where it goes into a liquid state, releasing energy directed to heat supply . After that, the refrigerant is supplied to the choke 4, where its pressure decreases, and then flows back to the condenser 1. If the heating capacity is insufficient, another compressor 2 is turned on, as a result of which the pressure of the refrigerant supplied to the evaporator increases, and, as a result, the temperature of the evaporator . At the same time, part of the cooling capacity was used to prepare drinking water by purifying tap water by freezing pieces of ice from it, followed by incomplete thawing and using purified water for drinking, or to obtain distilled water by cooling exhaust ventilation air to the dew point and condensing the water vapor contained in it.

Due to the change in the number of simultaneous pumps, the proposed installation allows to provide a change in the heating capacity of the system in a wider range compared to the prototype.

Claims (2)

1. A heat pump installation for hot water supply or heating, containing two or more compressors operating on one common evaporator, and one common condenser, characterized in that part of the cooling capacity is used to prepare drinking water by treating tap water by freezing pieces of ice from it, followed by incomplete thawing and using purified water for drinking, while organizing the discharge of impurities remaining in the unfrozen part of the ice with the organization of thawing and discharge into the sewers , Wherein the heat exchanger is provided precooling tap water, and heat energy is removed from the heat pump condenser is used for heating hot water in the hot water supply or heating system. 2. The heat pump installation according to claim 1, characterized in that part of the cooling capacity is used to produce distilled water by cooling the exhaust ventilation air to the dew point and condensing the water vapor contained therein.

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