CN201680511U - Air conditioner - Google Patents

Abstract

The utility model discloses an air conditioner being capable of improving energy efficiency, which relates to the technical field of air conditioners. The air conditioner is characterized in that the middle lower part of an outdoor heat exchanger (1) is provided with a liquid storage pot (11); the upper part of the liquid storage pot (11) is provided with an upper connecting pipe (10); one end of the upper connecting pipe (10) is inserted into the liquid storage pot (11) and extends to the bottom of the liquid storage pot (11), and the other end thereof is connected with the condenser pipe of the outdoor heat exchanger (1); the lower part of the liquid storage pot (11) is provided with a lower connecting pipe (13); one end of the lower connecting pipe (13) is inserted into the liquid storage pot (11) and extends to the top of the liquid storage pot (11); the other end of the lower connecting pipe (13) is connected with the condenser pipe of the outdoor heat exchanger (1); and the condenser pipe of the upper part of the outdoor heat exchanger, the liquid storage pot (11) and the condenser pipe of the lower part of the outdoor heat exchanger (1) form a refrigerating fluid passage. The utility model can simultaneously improve the refrigeration energy efficiency, heating capacity and heating energy efficiency.

Description

an air conditioner

technical field

The utility model relates to the technical field of air conditioners in electrical equipment, in particular to an air conditioner with improved energy efficiency.

Background technique

The global energy crisis is becoming more and more serious, and the energy-saving design of air conditioners is also the focus of the country's attention. The country has been raising the energy efficiency entry threshold of air conditioners. Generally, the way to improve the energy efficiency ratio of an air conditioner is to increase the area of the heat exchanger. This method increases the cost of the whole machine, and it is generally difficult to achieve both cooling and heating with high efficiency.

For heat pump air conditioners, it is generally difficult to achieve double efficiency in both cooling and heating, because the operating status of the air conditioner is different during cooling and heating, that is, the mass flow rate in the air conditioner is different, and the required refrigerant The charging volume is also different. An air conditioner with high energy efficiency generally uses a compressor with a smaller displacement, which can reduce the power of the whole machine. However, the problem caused by the compressor with a small displacement is insufficient heating capacity and low energy efficiency. .

For Chinese air-conditioning performance designers, the refrigeration system is generally designed first, and then the heating system is designed. When the refrigeration system is designed, the heating is often limited by the refrigeration design. Moreover, the heat exchange capacity of the heat exchanger is far from exerted during heating. When the outdoor heat exchanger is used as an evaporator in the heating state, the heat exchange on each road is often unbalanced, resulting in poor heat exchange efficiency.

As mentioned above, the general air conditioning and refrigeration system design has the following problems:

1) The optimal refrigerant charge required for cooling and heating is inconsistent;

2) When cooling, the outlet part of the condenser is a supercooled area, and the heat exchanger is occupied by the supercooled liquid, and the heat exchange efficiency is low;

3) In the heating state, when the outdoor heat exchanger is used as an evaporator, the flow distribution is uneven, resulting in poor heat exchange efficiency, which directly affects the capacity and energy efficiency.

Utility model content

The technical problem to be solved by the utility model is to provide an air conditioner capable of simultaneously improving cooling energy efficiency (EER), heating capacity and heating energy efficiency (COP).

In order to solve the above technical problems, the technical solution of the present utility model is: an air conditioner, a liquid storage tank is arranged in the lower part of the outdoor heat exchanger, an upper connecting pipe is arranged on the upper part of the liquid storage tank, and one end of the upper connecting pipe is inserted into the liquid storage tank. tank and extends to the bottom of the liquid storage tank, the other end of the upper connecting pipe is connected to the condensation pipe of the outdoor heat exchanger, the lower part of the liquid storage tank is provided with a lower connecting pipe, and one end of the lower connecting pipe is inserted into the liquid storage tank and extends to the liquid storage tank The top and the other end of the lower connecting pipe are connected to the condensation pipe of the outdoor heat exchanger, and the condensation pipe on the upper part of the outdoor heat exchanger, the liquid storage tank and the lower condensation pipe of the outdoor heat exchanger constitute the passage of the refrigerant.

A distributor is provided between the upper connecting pipe and the condensation pipe of the outdoor heat exchanger, and the upper connecting pipe is connected to the three-way condensation pipes of the first branch pipe, the second branch pipe and the third branch pipe through the distributor.

The first branch pipe and the second branch pipe are the condensation pipes in the middle of the outdoor heat exchanger, and the third branch pipe is the condensation pipe in the lower part of the outdoor heat exchanger. The unequal-length process design is adopted, which can improve the cooling and heating time at the same time. The heat transfer coefficient of the heat exchanger.

Both the upper connecting pipe and the lower connecting pipe are copper pipes.

The end of the lower connecting pipe in the liquid storage tank is provided with a bend of 70 to 90 degrees, and the bending direction faces away from the upper connecting pipe in the liquid storage tank

The beneficial effect of the utility model relative to the prior art is:

In the utility model, a dual-purpose liquid storage tank with a liquid storage and a distributor is arranged in the lower part of the outdoor heat exchanger, fully considering that the supercooled liquid is deposited in the liquid storage tank, and the uncooled vapor refrigerant continues to flow to the rear section Heat exchanger, boiling heat exchange, not only saves the use area of the heat exchanger but also increases the amount of heat exchange, thereby improving the cooling capacity and refrigeration energy efficiency (EER). The liquid storage tank is used as a liquid storage tank when cooling, and it is also It can be used as a flooded distributor, and the heating distribution is more uniform, which effectively improves the heating capacity and heating energy efficiency (COP), thus effectively solving the problem of inconsistent refrigerant charge required for cooling and heating.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Figure 1 is a schematic diagram of the assembly of a liquid storage tank and an outdoor heat exchanger in an air conditioner of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the liquid storage tank in the air conditioner of the present invention;

Fig. 3 is a schematic diagram of an internal elbow of the outdoor heat exchanger of the air conditioner of the present invention.

Detailed ways

Referring to accompanying drawings 1 and 2, a liquid storage tank 11 is provided in the middle and lower part of the outdoor heat exchanger 1 of the air conditioner, and an upper connecting pipe 10 is provided on the upper part of the liquid storage tank 11, and one end of the upper connecting pipe 10 is inserted into the liquid storage tank 11 and extends to the liquid storage tank. At about 10 mm from the bottom of the tank 11, the other end of the upper connecting pipe 10 is connected to the condensation pipe of the outdoor heat exchanger 1. The lower part of the liquid storage tank 11 is provided with a lower connecting pipe 13, and one end of the lower connecting pipe 13 is inserted into the liquid storage tank 11 and Extend to about 10 mm from the top of the liquid storage tank 11, and the end is provided with a bend of 70 to 90 degrees. There is a gap of about 10mm on the inner wall. This design mainly considers that the installation position is sufficient and that the vapor-liquid mixture can hit the inner wall of the liquid storage tank 11 during heating, and the liquid flows down the wall to separate the vapor-liquid two-phase state. . The other end of the connecting pipe 13 is connected to the condensation pipe of the outdoor heat exchanger 1. The condensation pipe on the upper part of the outdoor heat exchanger 1, the liquid storage tank 11 and the lower condensation pipe of the outdoor heat exchanger 1 form a refrigerant channel. The connecting pipe 10 And lower connection pipe 13 is copper pipe.

As shown in Figure 1 and Figure 3, the outdoor heat exchanger 1 divides the refrigerant into three paths after passing through the copper pipe splitter 3, and fully considers the influence of gravity and countercurrent heat exchange, and adopts unequal flow paths According to the design, it enters the liquid storage tank 11 through the distributor 8, distributes and stores the refrigerant, and then flows out from the bottom of the outdoor heat exchanger 1 after passing through a U-shaped pipe.

The specific implementation process of cooling and heating is as follows:

When the air conditioner is in cooling operation, the refrigerant is compressed by the compressor into high-temperature and high-pressure steam, and then enters the outdoor heat exchanger 1 through the exhaust pipe and the four-way valve. The outdoor heat exchanger 1 adopts a double-row tube-fin heat exchanger, and the refrigerant After passing through the copper pipe splitter 3, the high-temperature and high-pressure refrigeration steam is divided into three paths and flows into the outdoor heat exchanger 1. The first refrigerant passes through the first branch pipe 4 and then enters the outdoor heat exchanger 1. The middle and upper road flows to the upper part of the inner row, and then flows to the outside of the outdoor heat exchanger 1 after passing through the first elbow 15 on the upper part. The refrigerant flows out downward instead, and flows into the first branch pipe after passing through three elbows 5. The second refrigerant flows into the outdoor heat exchanger 1 from the second branch pipe 6 after passing through the branch of the copper pipe splitter 3, flows in from the upper middle part of the inner row to the middle part of the inner row, and flows downward through three After bridging the elbow, it flows into the second elbow 16 in the middle. After passing through the second elbow 16, the refrigerant turns from the inner row to the middle of the outer row, turns to flow upward, and finally flows into the second branch pipe 7; the third refrigeration The agent flows into the lower part of the outdoor heat exchanger 1 from the third branch pipe 12 after passing through the branch of the copper pipe splitter 3, flows from the lower part of the inner row of the outdoor heat exchanger 1 to the middle part of the inner row, and passes through the third branch After the elbow 17, it turns from the inner row to the outer row, flows downward from the middle of the outer row, and finally flows into the third branch pipe 9; the above three refrigerants all flow to the distributor 8, and after being mixed by the distributor 8, they become All the way, it flows into the liquid storage tank 11 after passing through the upper connecting pipe 10. At this time, the refrigerant has become a supercooled liquid, and flows into the liquid storage tank 11 after passing through the upper connecting pipe 10 of the copper pipe. After the liquid storage tank 11 is filled , flows into the outdoor heat exchanger 1 from the lower connecting pipe 13, flows downward from the lower part of the outer row of the outdoor heat exchanger 1, passes through a U-shaped pipe, and flows out from the outer row connecting pipe 14 at the bottom of the outdoor heat exchanger 1, and then Enter the capillary throttling, enter the evaporator after passing through the three-way valve, return to the four-way valve of the outdoor unit, and then flow into the suction port of the compressor, completing a refrigeration cycle process.

When the air conditioner is running for heating, the refrigerant is compressed by the compressor into high-temperature and high-pressure steam and enters the indoor heat exchanger through the exhaust pipe and four-way valve. The connecting pipe 14 at the bottom of the heater 1 enters, and the refrigerant flows out from the bottom of the heat exchanger, passes through a U-shaped pipe, flows into the liquid storage tank 11 along the lower connecting pipe 13 of the copper pipe, and passes through the copper pipe. After the pipe 13 is connected under the pipe, the refrigerant in the two-way state of vapor and liquid rushes out to the inner wall of the liquid storage tank 11 at high speed, and the refrigerant is mixed and distributed in the liquid storage tank 11 under the action of centrifugal force. Due to the influence of gravity, the refrigerant liquid It deposits at the bottom of the liquid storage tank 11, and the gaseous state is on the upper part of the liquid storage tank 11. The liquid refrigerant passes through the connecting pipe 10 on the copper pipe and then flows upward along the outer row of the outdoor heat exchanger 1, so that the liquid storage tank 11 is completed. A flooded distributor process, the refrigerant is distributed by the distributor 8 and then divided into three ways to flow to the outdoor heat exchanger 1: the first way flows in from the first branch pipe 5, and flows from the upper middle part of the heat exchanger to the upper part Outflow, after passing through the first elbow 15, it flows into the inner row of the heat exchanger, flows out downwards, and finally flows into the copper pipe splitter 3 from the first branch pipe 4; the second refrigerant flows into the outer row from the second branch pipe 7 The upper middle part of the heat exchanger flows out to the lower middle part, flows into the inner row of the heat exchanger after passing through the second elbow 16, flows upward through the second branch pipe 6, and then flows into the copper pipe splitter 3; the third refrigerant flows from the third The branch pipe 9 flows in from the lower outer row heat exchanger, flows out to the middle and upper part, passes through the third elbow 17, turns to the inner row of the heat exchanger, flows out from the bottom, and finally flows into the copper pipe splitter 3 after passing through the third branch pipe 12 . The three-way refrigerant flows out of the outdoor heat exchanger 1 after being mixed in the copper pipe splitter, and enters the suction port of the compressor through the four-way valve, completing a heating cycle process. The inside of the outdoor heat exchanger 1 is the leeward side of the heat exchanger, and the outside is the windward side of the heat exchanger.

Claims (5)

1. A kind of air conditioner, it is characterized in that liquid storage tank (11) is set in the lower part of outdoor heat exchanger (1), described liquid storage tank (11) top is provided with upper connecting pipe (10), upper connecting pipe ( 10) One end is inserted into the liquid storage tank (11) and extends to the bottom of the liquid storage tank (11), the other end of the upper connecting pipe (10) is connected to the condensation pipe of the outdoor heat exchanger (1), and the lower part of the liquid storage tank (11) A lower connecting pipe (13) is provided, one end of the lower connecting pipe (13) is inserted into the liquid storage tank (11) and extends to the top of the liquid storage tank (11), and the other end of the lower connecting pipe (13) is connected to the outdoor heat exchanger ( 1) is connected to the condensing pipe of the outdoor heat exchanger, the condensing pipe on the upper part of the outdoor heat exchanger, the liquid storage tank (11) and the lower condensing pipe of the outdoor heat exchanger (1) constitute the channel of the refrigerant. 2. The air conditioner according to claim 1, characterized in that a distributor (8) is arranged between the upper connecting pipe (10) and the condensation pipe of the outdoor heat exchanger (1), and the upper connecting pipe (10) The first branch pipe (5), the second branch pipe (7) and the third branch pipe (9) are connected to the three-way condensation pipe through the distributor (8). 3. The air conditioner according to claim 2, characterized in that the first branch pipe (5) and the second branch pipe (7) are condensation pipes in the middle of the outdoor heat exchanger (1), and the third branch pipe ( 9) is the condensation pipe at the bottom of the outdoor heat exchanger (1). 4. The air conditioner according to any one of claims 1 to 3, characterized in that both the upper connecting pipe (10) and the lower connecting pipe (13) are copper pipes. 5. The air conditioner according to claim 4, characterized in that the end of the lower connecting pipe (13) in the liquid storage tank (11) is provided with a bend of 70 to 90 degrees, and the bending direction faces away from the liquid storage tank (11 ) on the connecting pipe (10).

Images