CN108797048A - A kind of heat pump system and clothesdrier - Google Patents

Abstract

The invention discloses a heat pump system and a clothes dryer, which include a condenser and an evaporator. The condenser includes a plurality of heat exchange flat tubes and two collecting tubes. The two collecting pipes are respectively located at the inlet end and the outlet end of the heat exchange flat tube, and a plurality of tiny channels are arranged in the heat exchange flat tube; the evaporator includes a plurality of heat exchange copper tubes, each The outlet of one heat exchange copper tube is connected to the inlet of the other heat exchange copper tube through a copper tube elbow, and first fins are arranged on the heat exchange copper tube. The heat exchange flat tube of the condenser is formed by bending a pipe multiple times, which greatly reduces the number of solder joints and reduces the possibility of refrigerant leakage; multiple tiny channels increase the heat exchange area and improve heat exchange efficiency; The combination of micro-channel condenser and copper tube-fin evaporator further increases the heat exchange area, realizes the efficient use of heat pump dryer energy, and shortens the drying time.

Description

Heat pump system and clothes dryer

technical field

The invention relates to the technical field of household appliances, in particular to a heat pump system and a clothes dryer using the heat pump system.

Background technique

Along with improving constantly of people's living standard, simple washing machine can't satisfy people's requirement more and more. The appearance of the dryer with drying function has brought great convenience to people's life.

As an energy-saving technology, heat pumps are used in clothes dryers to replace the original electric heating. At present, the heat pump dryer is the most efficient and energy-saving in the field of dryers, and the drying process does not consume water, so the market prospect is broad. The heat exchanger significantly affects the energy efficiency of a heat pump dryer and the duration of the drying cycle. Existing evaporators and condensers are both microchannel heat exchangers where lint deposits and builds up on the fins of the heat exchanger at the end of the microchannel evaporator, causing additional pressure drop and heat transfer to the process air in the heat pump system Exchange produces thermal resistance, and cleaning devices must be added, which increases the complexity of the heat pump system and reduces the stability and reliability of the heat pump system; in addition, the flat tubes of the condenser are welded by headers or elbows at both ends. Complex, many solder joints, easy to leak refrigerant.

Contents of the invention

The purpose of the present invention is to provide a heat pump system to solve the technical problems in the prior art that the structure of the evaporator is complex, the stability and reliability are low, the condenser has many solder joints, and the refrigerant is easy to leak.

Another object of the present invention is to provide a clothes dryer using the above heat pump system.

As above design, the technical solution adopted in the present invention is:

A heat pump system comprising:

Condenser, which includes a plurality of heat exchange flat tubes and two headers, each of the heat exchange flat tubes is formed by bending the same pipe multiple times, and the two headers are respectively located in the heat exchange flat The inlet end and the outlet end of the tube, the heat exchange flat tube is provided with a plurality of tiny channels;

The evaporator includes a plurality of heat exchange copper tubes, the outlet of each heat exchange copper tube is connected to the inlet of another heat exchange copper tube through a copper tube elbow, and the heat exchange copper tube is provided with a first a fin.

Wherein, each of the heat exchange flat tubes is bent twice by the same tube to form three rows.

Wherein, a plurality of the tiny channels are arranged in parallel and spaced in the heat exchange flat tube.

Wherein, the equivalent diameter of the tiny channel is between 0.7 mm and 1.0 mm.

Wherein, second fins are provided between every two heat exchange flat tubes, and the second fins are distributed in a serpentine shape.

Wherein, the first fins are plate-shaped, and a plurality of the first fins are arranged in parallel and at intervals.

Wherein, the copper pipe elbow is connected to a support plate, and the first fin is located between the two support plates.

Wherein, the plurality of heat exchange copper tubes are arranged in parallel and spaced in a first direction, and are arranged in a staggered space in a second direction, and the first direction is perpendicular to the second direction.

A clothes dryer, comprising the heat pump system described in any one of the above items.

Wherein, a base is also included, and a water storage tank is arranged on the base, and the evaporator is located above the water storage tank.

In the heat pump system proposed by the present invention, the heat exchange flat tube of the condenser is formed by multiple bending of a tube, which greatly reduces the number of solder joints, reduces the possibility of refrigerant leakage, and increases the stability and reliability of the system ;Multiple tiny channels increase the heat transfer area and improve the heat transfer efficiency; the combination of the micro-channel condenser and the copper tube-fin evaporator further increases the heat transfer area and improves the heat transfer efficiency, realizing The efficient use of heat pump dryer energy shortens the drying time and saves power consumption.

The clothes dryer proposed by the present invention has the advantages of high stability, high heat exchange efficiency, short drying time, and low power consumption due to the above-mentioned heat pump system.

Description of drawings

Fig. 1 is a schematic structural diagram of an evaporator provided in Embodiment 1 of the present invention;

Fig. 2 is a structural schematic view omitting the first fin in Fig. 1;

Fig. 3 is a schematic structural diagram of a condenser provided in Embodiment 1 of the present invention;

Figure 4 is an enlarged view of A-A in Figure 3;

Fig. 5 is a schematic structural view of the tiny channels in the heat exchange flat tube provided by Embodiment 1 of the present invention;

Fig. 6 is a partial structural schematic diagram of the clothes dryer provided by Embodiment 2 of the present invention;

Fig. 7 is a working principle diagram of the clothes dryer provided by Embodiment 2 of the present invention.

In the picture:

10. Heat pump system; 20. Base;

101, evaporator; 102, condenser;

1011, heat exchange copper tube; 1012, copper tube elbow; 1013, support plate; 1014, first fin;

1021, heat exchange flat tube; 1022, collecting pipe; 1023, tiny channel; 1024, second fin.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings but not all of them.

Embodiment one

Referring to FIGS. 1 to 5 , a heat pump system includes an evaporator 101 , a condenser 102 , a compressor, a throttling device capillary and connecting pipelines.

The evaporator 101 includes a plurality of heat exchange copper tubes 1011, the outlet of each heat exchange copper tube 1011 is connected to the inlet of another heat exchange copper tube 1011 through a copper tube elbow 1012, and the heat exchange copper tube 1011 is provided with a first fin The sheet 1014, the first fins 1014 are plate-shaped, and a plurality of first fins 1014 are arranged in parallel and at intervals.

The condenser 102 includes a plurality of heat exchange flat tubes 1021 and two headers 1022. Each heat exchange flat tube 1021 is formed by bending the same pipe multiple times. A plurality of tiny channels 1023 are arranged in the heat exchange flat tube 1021 at the inlet end and the outlet end.

The heat exchange flat tube 1021 of the condenser 102 is formed by bending a pipe, which greatly reduces the number of solder joints, reduces the possibility of refrigerant leakage, and increases the stability and reliability of the system; multiple tiny channels 1023 increase The heat exchange area is increased, and the heat exchange efficiency is improved; the combination of the copper tube-fin evaporator 101 and the micro-channel condenser 102 is used to further increase the heat exchange area, improve the heat exchange efficiency, and realize the heat pump dryer The efficient utilization of energy shortens the drying time and saves power consumption; at the same time, the copper tube finned evaporator 101 does not need to clean the system, simplifies the structure, and further increases the stability and reliability of the system.

In this embodiment, each heat exchange flat tube 1021 is formed of three rows by bending a pipe twice, and there are 14 heat exchange flat tubes 1021 in total. During the bending process, the bending angle can be controlled according to the actual situation, and the length of the heat exchange flat tube 1021 can be controlled, so that the heat exchange flat tube 1021 has a compact structure, clear layers, and good flexibility.

A plurality of tiny channels 1023 are arranged in parallel and spaced in the heat exchange flat tube 1021 . The equivalent diameter of the tiny channel 1023 is between 0.7 mm and 1.0 mm. These tiny channels 1023 greatly increase the heat exchange area of the condenser 102, improve the heat exchange efficiency, and optimize the performance of the heat pump system, thereby saving power consumption and program running time.

Second fins 1024 are arranged between every two heat exchange flat tubes 1021, and the second fins 1024 are distributed in a serpentine shape. The thermal area improves the heat transfer efficiency.

The copper pipe elbow 1012 is connected to the support plates 1013 , and the first fin 1014 is located between the two support plates 1013 . A plurality of heat exchange copper tubes 1011 are arranged in parallel and at intervals in a first direction, and are arranged in a staggered interval in a second direction, and the first direction is perpendicular to the second direction. As many heat-exchanging copper tubes 1011 are arranged in the limited space as possible to make full use of the space; the interval between the heat-exchanging copper tubes 1011 is ensured, heat exchange is promoted, the efficiency is higher, and water flows down.

In this embodiment, the heat exchange copper tube 1011 has an outer diameter of 9.52 mm and a wall thickness of 0.35 mm. The first direction is the vertical direction, and the second direction is the horizontal direction. 1014 connection, the upper end surface and the lower end surface of the first fin 1014 are both set in a wave shape, which is beneficial for water to flow down.

Embodiment two

Fig. 6 and Fig. 7 show the second embodiment, in which the parts identical or corresponding to those of the first embodiment adopt the same reference numerals as those of the first embodiment. A clothes dryer, comprising the above-mentioned heat pump system 10, and further comprising a casing, a drum, a base 20 and a motor, the heat pump system 10 is installed on the base 20, a water storage tank is arranged on the base 20, and the evaporator 101 is located above the water storage tank. The condensed water flows from the first fin 1014 of the evaporator 101 to the water storage tank more easily, which shortens the cycle time of the system and saves energy.

When working, the condenser 102 in the heat pump system 10 heats the air into the drum to take away the water vapor of the clothes in the drum, and the hot and humid water vapor enters the evaporator 101, and the water vapor condenses into water, forming dry air that is heated by the condenser 102 and sent into the drum , forming a cycle in which the moisture in the drum clothes is continuously removed to achieve drying of the clothes.

The above embodiments only set forth the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. On the premise of not departing from the spirit and scope of the present invention, the present invention also has various changes and changes. These changes and changes are all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A heat pump system, characterized in that, comprising: Condenser, which includes a plurality of heat exchange flat tubes and two headers, each of the heat exchange flat tubes is formed by bending the same pipe multiple times, and the two headers are respectively located in the heat exchange flat The inlet end and the outlet end of the tube, the heat exchange flat tube is provided with a plurality of tiny channels; The evaporator includes a plurality of heat exchange copper tubes, the outlet of each heat exchange copper tube is connected to the inlet of another heat exchange copper tube through a copper tube elbow, and the heat exchange copper tube is provided with a first a fin. 2 . The heat pump system according to claim 1 , wherein each of the heat exchange flat tubes is bent twice from the same tube to form three rows. 3 . 3 . The heat pump system according to claim 1 , wherein a plurality of the tiny channels are arranged in parallel and spaced in the heat exchange flat tube. 4 . 4. The heat pump system according to claim 3, characterized in that, the equivalent diameter of the tiny channel is between 0.7 mm and 1.0 mm. 5 . The heat pump system according to claim 1 , wherein second fins are arranged between every two heat exchange flat tubes, and the second fins are distributed in a serpentine shape. 6. The heat pump system according to any one of claims 1-5, wherein the first fins are plate-shaped, and a plurality of the first fins are arranged in parallel and at intervals. 7. The heat pump system according to claim 6, wherein the copper pipe elbow is connected to a support plate, and the first fin is located between the two support plates. 8. The heat pump system according to any one of claims 1-5, characterized in that the plurality of heat exchange copper tubes are arranged in parallel and spaced in the first direction, and arranged in a staggered space in the second direction, and the first The one direction is perpendicular to the second direction. 9. A clothes dryer, characterized by comprising the heat pump system according to any one of claims 1-8. 10. The clothes dryer according to claim 9, further comprising a base, a water storage tank is arranged on the base, and the evaporator is located above the water storage tank.