CN203572022U - Air-energy heat pump - Google Patents

Abstract

The utility model belongs to the field of heat pumps, in particular to an air-energy heat pump which comprises an evaporator, a compressor, a condenser and an electronic expansion valve. The evaporator, the compressor, the condenser and the electronic expansion valve are installed in a case. A gas-liquid separator is connected between the evaporator and the compressor. A filter is connected between the electronic expansion valve and the condenser. The evaporator is provided with a fan. The condenser is installed in a hot water tank. The evaporator is provided with an inlet air temperature sensor. The compressor is provided with a compressor temperature sensor. A hot water temperature sensor is installed in the hot water tank. The inlet air temperature sensor, the compressor temperature sensor and the hot water temperature sensor are connected with the input end of a controller. The output end of the controller is connected with the fan and the compressor. The air-energy heat pump effectively solves the problems of system matching and volume adjusting of whole-year operation of the heat pump, and improves the energy efficiency ratio and the economic system performance of the whole-year operation.

Description

A kind of air energy heat pump

Technical field

The utility model belongs to art of heat pumps, specifically a kind of efficient cryogenic air energy heat pump.

Background technology

Heat pump (Heat Pump) is the device that a kind of heat energy by low-temperature heat source is transferred to high temperature heat source, is also the new energy technology that the whole world receives much attention.It is different from the plant equipment that can improve potential energy that people are familiar with---" pump "; Heat pump normally first obtains low grade heat energy from natural air, water or soil, through electric power acting, and then provides the high-grade that can be utilized heat energy to people.The operation principle of heat pump is consistent with the operation principle of refrigeration system.Refrigeration system (compression-type refrigeration) is generally comprised of four parts: compressor, condenser, choke valve, evaporimeter.Its course of work is: the liquid refrigerant of low-temp low-pressure (for example freon) first for example, absorbs heat and is gasificated into low-pressure steam from low-temperature heat source (chilled water) in evaporimeter.Then refrigerant gas is compressed into the steam of HTHP in compressor, this high temperature and high pressure gas in condenser for example, by the cooling highly pressurised liquid that condenses into of low-temperature heat source (cooling water).Through restricting element (capillary, heating power expansion valve, electric expansion valve etc.) throttling, become low-temp low-pressure liquid refrigerant again.So just complete a kind of refrigeration cycle.Air source hot pump water heater is mainly comprised of compressor, heat exchanger, aerofoil fan, attemperater, water pump, fluid reservoir, filter, electric expansion valve and electronic automatic controller etc.After switching on power, aerofoil fan entry into service, outdoor air carries out heat exchange by evaporimeter, air after temperature reduces is discharged system by fan, simultaneously, the working medium heat absorption vaporization of evaporimeter inside is inhaled into compressor, compressor becomes high temperature by this low pressure working fluid gas compression, gases at high pressure are sent into condenser, by the water of water pump forced circulation, also passed through condenser, after being heated by working medium, send to for user, and working medium is cooled into liquid, this liquid again flows into evaporimeter after expansion valve throttling cooling, so iterative cycles work, airborne heat energy is delivered in water by continuous " pump ", water temperature in attemperater is raise gradually, finally reach 55 ℃ of left and right, just in time be applicable to people's bathing.But the efficiency of air energy heat pump is low at low temperatures, in whole year operation, in capacity regulating, there are some problems.

Summary of the invention

Technical problem to be solved in the utility model is: how to improve the efficiency of air energy heat pump at low temperatures, solve capacity regulating problem in whole year operation, improve Energy Efficiency Ratio (COP) and the economic performance of heat pump.

The technical scheme that the utility model adopts is: a kind of air energy heat pump, comprise the evaporimeter that is arranged on enclosure interior, compressor, cool condenser, electric expansion valve, between evaporimeter and compressor, be connected with gas-liquid separator, between electric expansion valve and cool condenser, be connected with filter, fan is installed on evaporimeter, cool condenser is arranged in boiler, EAT sensor is installed on evaporimeter, compressor temperature sensor is installed on compressor, hot water temperature's sensor is installed in boiler, EAT sensor, compressor temperature sensor, hot water temperature's sensor connects the input of controller, the output of controller connects fan and compressor.

The beneficial effects of the utility model are: effectively solved system matches and capacity regulating problem in heat pump whole year operation, heat pump Energy Efficiency Ratio and the systematic economy performance of annual operation have been improved, there is energy-efficient, cheap, safe and reliable, long service life, simple operation and other advantages, there is good promotion and application prospect.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Wherein 1, housing; 2, evaporimeter; 3, compressor; 4, fan; 5, gas-liquid separator; 6, condenser inlet; 7, electric expansion valve; 8, filter; 9, condensator outlet; 10, controller; 11, hot water temperature's sensor; 12, EAT sensor; 13, compressor temperature sensor.

The specific embodiment

As shown in Figure 1, efficient cryogenic air energy heat pump described in the utility model embodiment, comprise housing, the inside of described housing 1 is provided withevaporimeter 2 andcompressor 3,evaporimeter 2 is provided with fan 4,evaporimeter 2 and fan 4 form air cooling heat exchanger, condenser is directly placed on the inside of boiler, hot water temperature's sensor is installed in boiler, utilize the condensation heat of cold-producing medium to carry out the water of heat hot water tank inside, the outlet ofevaporimeter 2 is connected with a port of gas-liquid separator 5 by pipeline, the another port of gas-liquid separator 5 is connected with the air entry ofcompressor 3 by pipeline, the exhaust outlet ofcompressor 3 is connected withcondenser inlet 6 by pipeline, the import ofevaporimeter 2 is connected with a port of electric expansion valve 7 by pipeline, electric expansion valve 7 can automatically switch according to air cooling heat exchanger intake air temperature, the another port of electric expansion valve 7 is connected with the outlet offilter 8 by pipeline, the import offilter 8 is connected with condensator outlet 9 by pipeline, thereby form the closed circulation path of cold-producing medium, fan 4 is a single-chip microcomputer withcompressor 3 by circuit and controller 10(controller) output is connected, the input ofcontroller 10 connects respectively hot water temperature'ssensor 11 by circuit,EAT sensor 12 and compressorexhaust temperature sensor 13.

During concrete use,compressor 3 adopts Full-closed rotary compressor suction side to be provided with gas-liquid separator 5 and produces Wet Compression to prevent compressor.Throttling arrangement adopts electric expansion valve 7, can, according to the difference in season, under the effect ofcontroller 10, regulate the different open degree of electric expansion valve 7.The upper end of electric expansion valve 7 is provided withfilter 8, to avoid the impurity of cold-producing medium to cause the obstruction of pipeline.Air cooling heat exchanger is comprised ofevaporimeter 2 and fan 4, andevaporimeter 2 is fin tubetype structure.Controller 10 is usingd hot water temperature'ssensor 11 andEAT sensor 12, compressorexhaust temperature sensor 13 as input, for controlling the automatic start-stop of compressor 3.Electric expansion valve 7 all switches different open degree automatically.The air quantity of air cooling heat exchanger regulates automatically.User can establish arbitrarily by controller hot water serviceability temperature within the scope of 30 ~ 60 ℃; in order to prevent the frequent start-stop ofcompressor 3;controller 3 will generate one automatically lower than the machine that the opens temperature of 5 ℃ of design temperatures; when in water tank, hot water temperature is lower than this temperature;controller 3 starts compressor automatically; until hot water temperature is while reaching design temperature,compressor 3 autostops.When air cooling heat exchanger EAT is during lower than a certain design temperature, electric expansion valve 7 is under the effect of controller, automatically switch, regulate less open degree, and when EAT is during lower than this temperature, electric expansion valve 7 is adjusted to larger open degree, and the internal circulating load of cold-producing medium andevaporimeter 2 heat absorption capacities match, and has guaranteed that air source hot pump water heater all has good Energy Efficiency Ratio at various weather conditions.

The cyclic process of cold-producing medium is as follows: the liquid refrigerant after electric expansion valve 7 throttlings flows inevaporimeter 2, under the effect of fan 4, carry out heat convection with outdoor air, absorb airborne heat and evaporate, then after gas-liquid separator 5inflow compressors 3 are compressed, enter in condenser, from then on condensation is discharged to obtaining water in storage tank, condensed refrigerant liquid flows inevaporimeter 2 pipes again throughfilter 8, electric expansion valve 7, completes thus once circulation.

Claims (1)

1. an air energy heat pump, comprise the evaporimeter that is arranged on enclosure interior, compressor, cool condenser, electric expansion valve, it is characterized in that: between evaporimeter and compressor, be connected with gas-liquid separator, between electric expansion valve and cool condenser, be connected with filter, fan is installed on evaporimeter, cool condenser is arranged in boiler, EAT sensor is installed on evaporimeter, compressor temperature sensor is installed on compressor, hot water temperature's sensor is installed in boiler, EAT sensor, compressor temperature sensor, hot water temperature's sensor connects the input of controller, the output of controller connects fan and compressor.

Images