CN206131514U - Defrosting system for air conditioner heating - Google Patents

Abstract

A defrosting system applied to air conditioning and heating systems, belonging to the field of air conditioning and heat pumps; the defrosting system includes a compressor, a heat storage heat exchanger, a four-way reversing valve, a gas-liquid separator, an indoor heat exchanger, a capillary tube , Outdoor heat exchanger, first normally closed valve, normally open valve, second normally closed valve, refrigerant spiral pipe, refrigerant pipeline. This system is applied to the defrosting of the outdoor heat exchanger of the air conditioner. When the weather temperature drops, the air conditioner changes from the cooling mode to the heating mode, and the outdoor heat exchanger changes from the original condenser to the evaporator. Due to the low outdoor temperature, the outdoor When the temperature of the heat exchanger is below zero, frost will form on the surface of the outdoor heat exchanger, which directly affects the heat transfer efficiency of the heat exchanger and affects the reduction of the heating efficiency of the air conditioner. This system uses the heat converted from the compression work of the compressor and the exhaust waste heat of the compressor to remove the frost layer of the outdoor heat exchanger and increase the heating power of the air conditioning unit.

Description

A defrosting system applied to air-conditioning and heating systems

technical field

The utility model relates to a defrosting system applied to an air-conditioning heating system, which belongs to the field of air-conditioning and heat pumps.

Background technique

At present, the general air conditioners on the market have two functions of cooling and heating. The way to realize this function is to realize the forward and reverse flow of refrigerant through the four-way reversing valve. When the weather temperature is low, the air conditioner switches to the heating function, the outdoor heat exchanger changes from a condenser to an evaporator, and the indoor heat exchanger changes from an evaporator to a condenser. At this time, the refrigerant evaporates in the outdoor heat exchanger Heat absorption, at this time, the surface temperature of the outdoor heat exchanger is low, and a frost layer is easy to form on the surface of the outdoor heat exchanger, and the thickening of the frost layer will directly affect the reduction of the heating efficiency of the air conditioner. The defrosting technology of air conditioners has become a hot issue that many manufacturers pay attention to.

Contents of the invention

The utility model designs an air-conditioning defrosting system, which installs a series of devices on the original air-conditioning unit to achieve the purpose of defrosting.

A defrosting system applied to air conditioning and heating systems, the defrosting system includes a compressor 1, a heat storage heat exchanger 2, a four-way reversing valve 3, a gas-liquid separator 4, an indoor heat exchanger 5, and a capillary tube 6 , Outdoor heat exchanger 7, first normally closed valve 8, normally open valve 9, second normally closed valve 10, refrigerant spiral pipeline 11, refrigerant pipeline 12.

The indoor heat exchanger 5 is connected to the outdoor heat exchanger 7 through a capillary tube 6, the compressor 1, the gas-liquid separator 4, the heat storage heat exchanger 2, and the four-way reversing valve 3 are connected in sequence to form a cycle structure, and the outdoor heat exchanger 7 A port of the first normally closed valve 8 and a normally open valve 9 are connected in parallel, the first normally closed valve 8 is connected to the heat storage heat exchanger 2, and the normally open valve 9 is connected to the four-way reversing valve 3; the four-way reversing valve 3 is connected to the indoor heat exchanger 5; the refrigerant spiral pipeline 11 is arranged on the surface of the compressor 1; the refrigerant pipeline 12 is a pipeline connecting the outlet of the compressor 1 and the inlet of the outdoor heat exchanger 7, and the second normally closed valve 10 is The normally closed solenoid valve in the refrigerant pipeline 12.

The exterior of the heat storage heat exchanger 2 is sealed with a heat insulating material, and a phase change material is installed inside, and the phase change material is selected according to the exhaust temperature of the air conditioner compressor.

The refrigerant spiral pipe 11 has a spiral shape and is used for absorbing waste heat of the compressor shell.

This system is applied to the defrosting of the outdoor heat exchanger of the air conditioner. When the weather temperature drops, the air conditioner changes from the cooling mode to the heating mode, and the outdoor heat exchanger changes from the original condenser to the evaporator. Due to the low outdoor temperature, the outdoor When the temperature of the heat exchanger is below zero, frost will form on the surface of the outdoor heat exchanger, which directly affects the heat transfer efficiency of the heat exchanger and affects the reduction of the heating efficiency of the air conditioner. This system uses the heat converted from the compression work of the compressor and the exhaust waste heat of the compressor to remove the frost layer of the outdoor heat exchanger and increase the heating power of the air conditioning unit.

Description of drawings

Figure 1 is a schematic diagram of the structure of the system.

In the figure: 1. Compressor, 2. Heat storage heat exchanger, 3. Four-way reversing valve, 4. Gas-liquid separator, 5. Indoor heat exchanger, 6. Capillary tube, 7. Outdoor heat exchanger, 8 , the first normally closed valve, 9, the normally open valve, 10, the second normally closed valve, 11, the refrigerant spiral pipeline, 12, the refrigerant pipeline.

detailed description

As shown in Figure 1, the working process of the heating mode of the original air conditioning unit is as follows: the second normally closed valve 10 is closed, the normally open valve 9 is opened, the first normally closed valve 8 is closed, the refrigerant is compressed in the compressor 1, It turns into high-temperature and high-pressure steam, flows through the heat storage heat exchanger 2, part of the heat is absorbed by the phase change material in the heat storage heat exchanger, the heat absorption temperature of the phase change material rises and undergoes a phase change, and the refrigerant passes through the heat storage heat exchanger , flows through the four-way reversing valve 3, enters the indoor heat exchanger 5, the refrigerant condenses and releases heat, then passes through the capillary tube 6, enters the outdoor heat exchanger 7, the refrigerant evaporates and absorbs heat, passes through the normally open valve 9 and the four-way exchange To the valve 3, enter the gas-liquid separator 4, and finally flow back to the compressor 1.

Defrost working mode: the second normally closed valve 10 is opened, the normally open valve 9 is closed, the first normally closed valve 8 is opened, the refrigerant is compressed in the compressor 1 and becomes high-temperature and high-pressure steam, and passes through the refrigerant pipeline 12 and The second normally closed valve 10 enters the outdoor heat exchanger 7, and the steam defrosts it through the outdoor heat exchanger 7, and then flows through the first normally closed valve 8 and enters the heat storage heat exchanger 2 to absorb the internal phase of the heat exchanger. The heat of the transformed material flows back to the compressor 1 through the refrigerant spiral pipe 11 spiraling on the surface of the compressor.

The defrosting system in the heating stage of the air conditioner is to install a series of defrosting devices in the original heating system of the air conditioner. These devices have a refrigerant pipeline 12 and a second normally closed valve 10 in the bypass pipeline, which is connected to the outdoor heat exchange The normally open and normally open valve 9 in the pipeline of the device and the four-way reversing valve is connected to the first normally closed valve 8 in the pipeline of the indoor heat exchanger and the heat storage heat exchanger, and the heat storage heat exchanger 2 at the outlet of the compressor is hovering Refrigerant piping 11 on the surface of the compressor.

The second normally closed valve is in a closed state during the heating process of the air conditioner. When the defrosting function is started, the second normally closed valve is opened, and the second normally closed valve is closed when the defrosting is completed.

The normally open valve 9 is in a normally open state. When the air conditioner is in a heating state, the valve is opened, when the defrosting function is opened, the valve is closed, and when the defrosting is finished, the valve is opened.

The first normally closed valve 8 is in a normally closed state. When the air conditioner is in the heating state, the first normally closed valve 8 is closed. When the defrosting function is turned on, the first normally closed valve 8 is opened. After defrosting, the first normally closed valve 8 is closed. .

Claims (3)

1. it is a kind of be applied to air-conditioning heating system except defrosting system, it is characterised in that：This includes compressor (1), stores except defrosting system Heat exchanger (2), four-way change-over valve (3), gas-liquid separator (4), indoor heat exchanger (5), capillary (6), outdoor heat exchanger (7), the first normally close valve (8), normally open valve (9), the second normally close valve (10), cold-producing medium spiral pipeline (11), refrigerant line (12),

Indoor heat exchanger (5) is connected with outdoor heat exchanger (7) by capillary (6), compressor (1), gas-liquid separator (4), storage Heat exchanger (2), four-way change-over valve (3) are sequentially connected composition loop structure, and the Single port of outdoor heat exchanger (7) is parallel with first Normally close valve (8), normally open valve (9), the first normally close valve (8) is connected with regenerative heat exchanger (2), normally open valve (9) and four-way change-over valve (3) Connection；Four-way change-over valve (3) is connected with indoor heat exchanger (5)；The cold-producing medium pipeline (11) that spirals is arranged on compressor (1) surface； Refrigerant line (12) is connection compressor (1) outlet and the pipeline of outdoor heat exchanger (7) import, and the second normally close valve (10) is system Normally closed magnetic valve in refrigerant circuit (12).

2. it is according to claim 1 it is a kind of be applied to air-conditioning heating system except defrosting system, it is characterised in that：Regenerative heat exchange The appearance of device (2) is sealed with heat-barrier material, and inside is equipped with phase-change material, temperature value of the phase-change material according to refrigeration compressor ventilating Choose.

3. it is according to claim 1 it is a kind of be applied to air-conditioning heating system except defrosting system, it is characterised in that：Cold-producing medium disk Coil road (11) is spiral-shaped, to absorb compressor housing used heat.