CN201277708Y

CN201277708Y - Frostless air source water heater

Info

Publication number: CN201277708Y
Application number: CNU2008201218437U
Authority: CN
Inventors: 吴平
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-28
Filing date: 2008-07-28
Publication date: 2009-07-22
Anticipated expiration: 2018-07-28

Abstract

The utility model relates to a frostless air source water heater which comprises a condenser, an evaporator, a gas-liquid separator, a compressor and a throttling element, wherein the freezing medium outlet of the compressor is connected with the freezing medium inlet of the condenser by a valve, and both ends of the throttling element are respectively connected with the freezing medium outlet of the condenser and the freezing medium inlet of the evaporator; both ends of the gas-liquid separator are respectively connected with the freezing medium outlet of the evaporator and the freezing medium inlet of the condenser, and a heating bypass is arranged between the freezing medium outlet of the compressor and the freezing medium inlet of the condenser and comprises a valve and a heating tube which penetrates through a pipe coil of the evaporator. High-temperature and high-pressure air in the compressor can control and heat the evaporator by the heating bypass so that the pipe coil and the ribs of the evaporator are hard to frost. Even if the evaporator is frosted, the evaporator can be conveniently defrosted by the heating bypass which does not consume additional energy so as to protect the environment in deed.

Description

The Frostless air source water heater

(1) technical field

The utility model relates to a kind of air source water heater.

(2) technical background

Air source water heater is the energy-efficient rapidly water heater of development in recent years.The operation principle of air source hot pump water heater is: adopt contrary Carnot cycle principle to absorb heat by the temperature difference of cold-producing medium and outside air, the compression of compressor heat and condenser in the processes such as lasting heat exchange of cold-producing medium and water, heat water to uniform temperature.The hot water that makes is deposited in the insulation heat storage water tank, uses at any time for the user.

During heating operation, its finned coil heat exchanger plays the effect of evaporimeter to net for air-source heat pump units in the winter time, because evaporating temperature is lower, the temperature of coil surface also descends thereupon, even is lower than 0 ℃.When outdoor air was flowed through coil pipe under blower fan drives, its contained moisture will be separated out and be attached to coil surface and be formed the frost layer.The Defrost method of at present more common air source heat pump has two kinds: cross valve reverse cycle defrost and hot-gas bypass defrosting.Cross valve needs frequent commutation during cross valve reverse cycle defrost method, and noise is big, and the frost layer of heat exchanger bottom is difficult to remove, and causes ice sheet to pile up; Hot-gas bypass method such as electrical heating bypass need the additive decrementation energy.

(3) utility model content

Even if technical problem to be solved in the utility model be to provide a kind of simple in structure, be difficult for frosting or the also convenient Frostless air source water heater of removing, need not extra energy consumption of frosting.

Described Frostless air source water heater, comprise condenser, evaporimeter, gas-liquid separator, compressor and restricting element, the compressor refrigerant outlet connects the condenser refrigerant inlet through valve, the restricting element two ends are connected with the evaporator refrigerant inlet with the condenser refrigerant outlet respectively, the vapour liquid separator two ends are connected with the compressor refrigerant inlet with the evaporator refrigerant outlet respectively, be provided with between described compressor refrigerant outlet and the condenser refrigerant inlet and add thermal bypass, the described thermal bypass that adds comprises valve and heating tube, and heating tube passes evaporator coil.

Further, described evaporimeter is provided with temperature element, and valve is connected control device respectively with temperature element.

Further, described valve is a magnetic valve.

The beneficial effects of the utility model are:

1. the high temperature and high pressure gas of compressor can be controlled heating to evaporimeter by adding thermal bypass, thereby makes evaporator coil and fin be difficult for frosting;

Even if 2 evaporimeter frostings can conveniently carry out defrost operation to evaporimeter by originally adding thermal bypass;

3, from the circulatory system angle of an integral body, originally adding thermal bypass does not have the additive decrementation energy, thereby has really accomplished energy-conserving and environment-protective.

(4) description of drawings

Fig. 1 is a system architecture schematic diagram of the present utility model.

(5) specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples, but protection domain of the present utility model is not limited to this.

With reference to Fig. 1, a kind of Frostless air source water heater, comprise condenser 1, evaporimeter 2, gas-liquid separator 3, compressor 4 and restricting element 5, compressor 4 refrigerant outlets connect condenser 1 refrigerant inlet through valve 6, restricting element 5 two ends are connected with evaporimeter 2 refrigerant inlets with condenser 1 refrigerant outlet respectively, vapour liquid separator 3 two ends are connected with compressor 4 refrigerant inlets with evaporimeter 2 refrigerant outlets respectively, be provided with between described compressor 4 refrigerant outlets and condenser 1 refrigerant inlet and add thermal bypass, the described thermal bypass that adds comprises valve 7 and heating tube 8, and heating tube 8 passes evaporimeter 2 coil pipes.

Described evaporimeter 2 is provided with temperature element 9, and valve 7 is connected control device 10 respectively with temperature element 9.

When this water heater used in winter, both can control that to add thermal bypass in running order all the time, also can set the opening time of valves 7, only when temperature is lower than a certain setting value, just start working, with the never frosting of assurance evaporimeter by control device 10.

Claims

1, a kind of Frostless air source water heater, comprise condenser, evaporimeter, gas-liquid separator, compressor and restricting element, the compressor refrigerant outlet connects the condenser refrigerant inlet through valve, the restricting element two ends are connected with the evaporator refrigerant inlet with the condenser refrigerant outlet respectively, the vapour liquid separator two ends are connected with the compressor refrigerant inlet with the evaporator refrigerant outlet respectively, it is characterized in that: be provided with between outlet of described compressor refrigerant and the condenser refrigerant inlet and add thermal bypass, the described thermal bypass that adds comprises valve and heating tube, and heating tube passes evaporator coil.

2, Frostless air source water heater as claimed in claim 1 is characterized in that described evaporimeter is provided with temperature element, and valve is connected control device respectively with temperature element.

3, Frostless air source water heater as claimed in claim 1 or 2 is characterized in that described valve is a magnetic valve.