Enhanced vapor injection device of air energy heat pump, control method and water heater for air energy heat pump

Abstract

The invention relates to an enhanced vapor injection device of an air energy heat pump, a control method and a water heater for the air energy heat pump. The enhanced vapor injection device of the air energy heat pump comprises an ordinary non-enhanced-vapor-injection compressor (1), an air inlet pipeline (2), a first bypass valve (3), a liquid storing device (4) and an air return pipeline (5), wherein the front end of the air inlet pipeline (2) is connected with an exhaust opening of the compressor (1), and the tail end of the air inlet pipeline (2) is connected with an inlet of the liquid storing device (4); the front end of the air return pipeline (5) is connected with an outlet of the liquid storing device (4), and the tail end of the air return pipeline (5) is connected with an air suction opening of the compressor (1); and the first bypass valve (3) is arranged at the front end of the air inlet pipeline (2). According to the enhanced vapor injection device of the air energy heat pump provided by the invention, enhanced vapor injection can be realized on an air energy heat pump system by using an ordinary compressor, so that the compressor can be safely operated all along in a condition with extremely low temperature; the energy efficiency of the air energy heat pump system in the condition with extremely low temperature can be improved; and the cost of the water pump of the air energy heat pump can be reduced.

Description

technical field

[0001] The invention relates to the technical field of air energy heat pumps, in particular to an air energy heat pump air injection enthalpy increasing device, a control method and an air energy heat pump water heater. Background technique

[0002] When the current air energy heat pump system is in heating operation, the lower the outdoor temperature, the less refrigerant the compressor sucks in, which reduces the heating capacity and efficiency of the air energy heat pump system. When the outdoor temperature drops below minus fifteen degrees At this time, the heating performance of the air source heat pump system has deteriorated to a very serious level, and even the compressor will burn out due to the excessive pressure difference between the suction and exhaust. In the prior art, the air-jet enthalpy-increasing compressor is generally used instead of the ordinary compressor. For example, the air source heat pump water heater disclosed in the utility mode...

Examples

Embodiment 1

[0026] Such as figure 1 As shown, the air energy heat pump air injection enthalpy increasing device includes a compressor 1, an intake pipe 2, a first bypass valve 3, a liquid reservoir 4, and a return air pipe 5; The exhaust port is connected, and the end is connected with the inlet of the liquid reservoir 4; the front end of the return air pipeline 5 is connected with the outlet of the liquid reservoir 4, and the end is connected with the suction port of the compressor 1; the first bypass valve 3 is set at the inlet Pipeline 2 front end. The above-mentioned parts constitute the air injection enthalpy increasing circulation loop.

[0027] continue to see figure 1 , The heat exchange cycle circuit of the air energy heat pump water heater includes a compressor 1, a four-way valve 6, a condenser 7, a liquid separator 8, a water heat exchanger 9, and a liquid reservoir 4, and the above-mentioned parts are connected in sequence through copper pipes.

[0028] continue to see fi...

Embodiment 2

[0037] Such as figure 2 As shown, the air energy heat pump air injection enthalpy increasing device includes a compressor 1, an intake pipe 2, a first bypass valve 3, a second bypass valve 10, a pressure reducing valve (not shown in the figure), a liquid reservoir 4, The air return pipeline 5; wherein, the front end of the air intake pipeline 2 is connected with the exhaust port of the compressor 1, and the end is connected with the inlet of the liquid reservoir 4; the front end of the air return pipe 5 is connected with the outlet of the liquid reservoir 4, and the end is connected with the compressor The suction port of the machine 1 is connected; the first bypass valve 3 is arranged at the front end of the intake pipe 2, and the second bypass valve 10 and the pressure reducing valve are arranged at the end of the return air pipe 5. The above-mentioned parts constitute the air injection enthalpy increasing circulation loop.

[0038] continue to see figure 2 , The heat ex...

Embodiment 3

[0048] Such as image 3 As shown, the air energy heat pump air injection enthalpy increasing device includes a compressor 1, an intake pipe 2, a first bypass valve 3, an air injection enthalpy increasing preheater 11, a second bypass valve 10 and a pressure reducing valve (not shown in the figure Out), liquid storage 4, return air pipeline 5; wherein, the front end of the intake pipe 2 is connected with the exhaust port of the compressor 1, and the end is connected with the inlet of the liquid storage 4; the front end of the return air pipeline 5 is connected with the liquid storage The outlet of 4 is connected, and the end is connected with the suction port of compressor 1; the first bypass valve 3 is arranged at the front end of the intake pipe 2, the second bypass valve 10 and the pressure reducing valve are arranged at the end of the return air pipe 5, and the air injection The enthalpy preheater 11 is connected in series with the middle part of the intake pipe 2 and the r...

technical field

[0001] The invention relates to the technical field of air energy heat pumps, in particular to an air energy heat pump air injection enthalpy increasing device, a control method and an air energy heat pump water heater. Background technique

[0002] When the current air energy heat pump system is in heating operation, the lower the outdoor temperature, the less refrigerant the compressor sucks in, which reduces the heating capacity and efficiency of the air energy heat pump system. When the outdoor temperature drops below minus fifteen degrees At this time, the heating performance of the air source heat pump system has deteriorated to a very serious level, and even the compressor will burn out due to the excessive pressure difference between the suction and exhaust. In the prior art, the air-jet enthalpy-increasing compressor is generally used instead of the ordinary compressor. For example, the air source heat pump water heater disclosed in the utility mode...

Examples

Embodiment 1

[0026] Such as figure 1 As shown, the air energy heat pump air injection enthalpy increasing device includes a compressor 1, an intake pipe 2, a first bypass valve 3, a liquid reservoir 4, and a return air pipe 5; The exhaust port is connected, and the end is connected with the inlet of the liquid reservoir 4; the front end of the return air pipeline 5 is connected with the outlet of the liquid reservoir 4, and the end is connected with the suction port of the compressor 1; the first bypass valve 3 is set at the inlet Pipeline 2 front end. The above-mentioned parts constitute the air injection enthalpy increasing circulation loop.

[0027] continue to see figure 1 , The heat exchange cycle circuit of the air energy heat pump water heater includes a compressor 1, a four-way valve 6, a condenser 7, a liquid separator 8, a water heat exchanger 9, and a liquid reservoir 4, and the above-mentioned parts are connected in sequence through copper pipes.

[0028] continue to see fi...

Embodiment 2

[0037] Such as figure 2 As shown, the air energy heat pump air injection enthalpy increasing device includes a compressor 1, an intake pipe 2, a first bypass valve 3, a second bypass valve 10, a pressure reducing valve (not shown in the figure), a liquid reservoir 4, The air return pipeline 5; wherein, the front end of the air intake pipeline 2 is connected with the exhaust port of the compressor 1, and the end is connected with the inlet of the liquid reservoir 4; the front end of the air return pipe 5 is connected with the outlet of the liquid reservoir 4, and the end is connected with the compressor The suction port of the machine 1 is connected; the first bypass valve 3 is arranged at the front end of the intake pipe 2, and the second bypass valve 10 and the pressure reducing valve are arranged at the end of the return air pipe 5. The above-mentioned parts constitute the air injection enthalpy increasing circulation loop.

[0038] continue to see figure 2 , The heat ex...

Embodiment 3

[0048] Such as image 3 As shown, the air energy heat pump air injection enthalpy increasing device includes a compressor 1, an intake pipe 2, a first bypass valve 3, an air injection enthalpy increasing preheater 11, a second bypass valve 10 and a pressure reducing valve (not shown in the figure Out), liquid storage 4, return air pipeline 5; wherein, the front end of the intake pipe 2 is connected with the exhaust port of the compressor 1, and the end is connected with the inlet of the liquid storage 4; the front end of the return air pipeline 5 is connected with the liquid storage The outlet of 4 is connected, and the end is connected with the suction port of compressor 1; the first bypass valve 3 is arranged at the front end of the intake pipe 2, the second bypass valve 10 and the pressure reducing valve are arranged at the end of the return air pipe 5, and the air injection The enthalpy preheater 11 is connected in series with the middle part of the intake pipe 2 and the r...

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