CN107815812B - High-efficiency condenser and washing machine with same - Google Patents

Abstract

The invention discloses a high-efficiency condenser and a washing machine with the condenser. The condenser is a cavity structure that is wide at the top and narrow at the bottom, and the lower part is bent to one side. The outer drum of the washing machine is connected, and an air outlet is opened at the top to connect with the fan in the drying air duct. The side with the smaller curvature radius of the lower curved part is the inner side, and the side with the larger curvature radius is the outer side; heat exchange The tubes are arranged in the shell to exchange heat with moist and hot air, are hollow and are wound into multi-row cylindrical spring-shaped heat exchange tubes arranged in multiple rows up and down; the spray box is arranged above the heat exchange tubes for flushing the Lining; Condensation drain, located at the bottom of the condenser to drain the condensate from the condenser and connect to the washing machine drain. The invention realizes the gas-liquid separation in the condensation process, and makes the heat exchange more sufficient and the condensation efficiency improved by changing the density, outer diameter and inner diameter of the heat exchange tube, thereby improving the drying efficiency of the clothes washer and dryer.

Description

A high-efficiency condenser and washing machine with the same

technical field

The invention belongs to the field of washing and drying machines, and in particular relates to a high-efficiency condenser and a washing machine with the condenser.

Background technique

Most of the washing and drying machines on the market are cleaning appliances that use electric heat to automatically dry clothes. It is an important household appliance for areas where the air humidity is high and the clothes are not easy to dry. The washing and drying machine is divided into drum type and cabinet type according to the structure, and the drum type is mostly. The tumble dryer is generally composed of a box, a drum system, a hot air system, a transmission and a control system; according to the water discharge method, it is divided into: exhaust type and dehumidification type. The exhaust type is a high temperature and high humidity formed by evaporating the water in the machine. The air is directly discharged to the outside of the machine, and the dehumidification type is to pass the high-temperature and high-humidity air through the heat exchanger to generate condensed water and then discharge it to the outside of the machine.

The condensing drying system of the front-loading washing machine is to set a condenser in the circulating air duct. The drying hot air heats the moisture in the wet clothes into steam. When passing through the condenser, the steam is cooled into flowing water and discharged to the outside of the washing machine, and the condensed dry air passes through. The fan and heater become dry hot air, blowing through the clothes again until all the moisture in the clothes is turned into steam, and then the steam is condensed into water and drained to achieve the purpose of drying. In this process, the temperature and humidity of the hot air play a decisive role. The temperature of the hot air depends on the power of the heater, which is determined by the heat resistance of the fibers; the humidity of the hot air is the water vapor content, and the ability of the water vapor to turn into distilled water depends on the condensing capacity of the condenser, so improving the condensing capacity of the condenser is necessary. Improve drying efficiency. In the prior art, the following two methods are generally adopted: one is to implement fan cooling or water spray cooling on the outer surface of the condenser shell and the hot air duct, and the other is to cool the inside of the condenser or the air duct with cooling water.

Chinese patent CN200610000722.2 discloses "a condensing structure for high-efficiency drying washing machine drying system" including a condensing air duct and a condensing water inlet pipe, and at least one condensing device is fixedly arranged in the condensing air duct: One end of the condensing device is provided with a condensed water spray device which is connected with the condensed water inlet pipe and cools the condensing device. A condensed water spray device connected to the condensed water inlet pipe is arranged above the condensing device, and is convenient for the condensed water to pass along the condensing plate.

The invention does not realize the problem of gas-liquid mixing in the condensation process, and at the same time, the space in the condenser is not fully utilized, the heat exchange area cannot be controlled, and the utilization is insufficient. Decrease drying efficiency.

Chinese patent CN 201410488762.0 discloses that "a self-cleaning filter device for clothes dryer" includes a condenser, a filter screen, an air duct, a water storage box, a water storage tank, a drain pump, and an upper drain pipe is arranged between the water storage box and the drain pump, A water level sensor is arranged in the water storage tank, and also includes a sprayer, which is arranged in the air duct, located between the filter screen and the condenser, and the T drain pipe is used to connect the water storage box and the sprayer; the first sensor, located in the air duct, senses The accumulated amount of lint on the filter net; the controller receives the signals transmitted by the first sensor and the water level sensor, and sends out instructions to control the opening and closing of the drainage pump and the sprinkler respectively.

The position of the sprinkler of the present invention is located between the filter screen and the condenser, and a sensor is arranged, which increases the complexity of the equipment, and when the sensor fails, the sprinkler mechanism cannot operate normally.

The present invention has been made in view of this.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a high-efficiency condenser and a washing machine with the condenser, which successfully realizes the gas-liquid separation in the condensation process, and makes the heat exchange between the heat exchange media sufficient, and the condensation Efficiency is increased while providing a spray device for the condenser to flush out lint buildup, thereby reducing the drying time of the washer-dryer.

In order to achieve this purpose, the present invention adopts following technical scheme:

A high-efficiency condenser, applied to a washing and drying machine, the condenser is a cavity structure with a wide upper part and a narrow lower part, and the lower part is curved to one side, comprising:

The outer shell has an air inlet at the bottom connected to the outer drum of the washing machine, and an air outlet at the top connected with the fan in the drying air duct. The side with the smaller curvature radius of the lower curved part is the inner side, and the side with the larger curvature radius The side is the outer side;

The heat exchange tube is arranged in the shell to exchange heat with the moist and hot air, and is hollow and wound into a multi-row cylindrical spring-shaped heat exchange tube arranged in multiple rows up and down;

The spray box is arranged above the heat exchange tube for flushing the lint on the heat exchange tube;

The condensate drain, located at the bottom of the condenser, is used to drain the condensed water in the condenser and is connected to the drain pipe of the washing machine.

Further, the outer diameter of the heat exchange tube is unchanged, the thickness of the heat exchange tube is unchanged, and the pitch of the cylindrical spring-shaped heat exchange tubes in the same row gradually increases from the outer side to the inner side.

Further, the pitch of the parallel cylindrical spring-shaped heat exchange tubes is unchanged, the thickness of the heat exchange tubes is unchanged, and the outer diameter of the heat exchange tubes gradually decreases from the outer side to the inner side.

Further, the pitch of the cylindrical spring-shaped heat exchange tubes is unchanged, the outer diameter of the heat exchange tubes is unchanged, and the inner diameter of the heat exchange tubes gradually decreases from the downward direction to the upward direction.

Further, the gap between two adjacent turns of the cylindrical spring-shaped heat exchange tubes is fixed, the thickness of the heat exchange tubes is constant, and the outer diameter of each row of heat exchange tubes gradually decreases from the downward to the upward.

Further, the outer diameter of the heat exchange tube is 2-15mm.

Further, the liquid inlet of the heat exchange tube is connected to the low temperature liquid pipeline at the upper end of the condenser, and the liquid discharge port is located at the lower end of the condenser and connected to the high temperature liquid pipeline.

Further, the upper part of the heat exchange tube has a spray box, the spray box is a hollow cavity structure, the top has a water inlet, and the bottom is a circular arc-shaped downward protrusion in the length direction of the spray box. Curved bottom.

Further, the water inlet is connected with the water inlet pipeline of the washing machine.

Further, the length of the shower box is smaller than the length of the top of the casing in the same direction, and is close to the inner wall of the outer side of the casing, and a plurality of spray water outlets are opened on the bottom surface of the shower box.

A washing machine with a condenser, which has the high-efficiency condenser of any one of the above-mentioned features.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

The high-efficiency condenser and the washing machine with the condenser disclosed in the present invention successfully realize the gas-liquid separation in the condensation process, overcome the disadvantages of the existing condenser that directly condenses with cold water, and make the heat exchange process easier. The heat exchange area is fixed and controllable. The cylindrical spring-shaped heat exchange tube in the present invention increases the contact area between the heat exchange device and the hot and humid air; by combining the air flow direction in the inner cavity of the condenser, the density and outer diameter of the cylindrical spring-shaped heat exchange tube are comprehensively adjusted The overall area of the heat exchanger can be fully and reasonably utilized, and the heat exchange efficiency between the humid and hot air and the heat exchange tube is greatly improved. At the same time, in the present invention, the upper part of the heat exchange tube is also provided with a spray box, and the spray box uses the water flow to wash the wire scraps adhering to the heat exchange tube, so as to avoid the decrease of heat exchange efficiency and the breeding of bacteria caused by the accumulation of the wire scraps, not only The heat exchange efficiency is improved, the overall drying time of the washing and drying machine is shortened, and the sanitary environment of the washing and drying machine is improved.

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached image:

1 is a schematic sectional view of a portion of a washing and drying machine using the present invention;

Fig. 2 is the outline schematic diagram of the washing and drying machine using the present invention;

Fig. 3 is the sectional schematic diagram of the condenser assembly of the present invention;

Fig. 4 is the condenser assembly schematic diagram of the present invention;

Fig. 5 is the heat exchange tube schematic diagram of the condenser of the present invention;

Fig. 6 is the appearance schematic diagram of the spray box of the condenser of the present invention;

FIG. 7 is a schematic sectional view of the spray box of the condenser of the present invention.

In the figure: 1. Condenser; 2. Condensation drain; 3. Liquid drain; 4. Heat exchange pipe; 5. Shell; 6. Liquid inlet; 7. Spray box; 8. Air inlet; 9. Outlet Air outlet; 10, water inlet of spray box; 11, water outlet of spray; 12, door body; 13, outer cylinder; 14, motor; 15, fan; 16, heater; 17, drying air duct; 18, inner side; 19, outer side.

It should be noted that these drawings and written descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention , but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in FIG. 1 to FIG. 7 , the present invention discloses a high-efficiency condenser and a washing machine with the condenser. The condenser 1 is a cavity structure that is wide at the top and narrow at the bottom, and the lower part is bent to one side, including: a casing 5, an air inlet 8 is opened at the lower part to connect with the outer tub 13 of the washing machine, and an air outlet 9 is opened at the top to connect with the dryer. The fans 15 in the dry air duct 17 are connected to each other, and the side of the lower curved part with the smaller radius of curvature is the inner side 18, and the side with the larger radius of curvature is the outer side 19; the heat exchange tube 4 is arranged on the casing 5 It exchanges heat with moist and hot air inside, and is hollow and wound into a multi-row cylindrical spring-shaped heat exchange tube arranged in multiple rows up and down; Chips; condensate drain port 2, located at the bottom of the condenser 1 for draining the condensed water in the condenser 1 and connected to the drain pipe of the washing machine. The invention realizes the gas-liquid separation in the condensation process, and makes the heat exchange more sufficient and the condensation efficiency improved by changing the density, outer diameter and inner diameter of the heat exchange tube, thereby improving the drying efficiency of the clothes washer and dryer.

Example 1

As shown in FIG. 1 to FIG. 5 , the high-efficiency condenser 1 in this embodiment is applied to a washing and drying machine, and the condenser 1 is a cavity structure with a wide upper part and a narrow lower part, and the lower part is curved to one side, including:

Shell 5, the lower part has an air inlet 8 connected to the outer cylinder 13 of the washing machine, the top has an air outlet 9 connected to the fan 15 in the drying air duct 17, and the side with the smaller curvature radius of the lower curved part is the inner side. 18. The side with the larger radius of curvature is the outer side 19;

The heat exchange tube 4 is arranged in the outer casing 5 to exchange heat with the moist and hot air, and is hollow and wound into a multi-row cylindrical spring-shaped heat exchange tube arranged in multiple rows up and down. The liquid inlet 6 of the heat exchange tube 4 is located at the condensation The upper end of the condenser 1 is connected to the low temperature liquid pipeline, and the liquid discharge port 3 is located at the lower end of the condenser 1 and connected to the high temperature liquid pipeline. The low temperature pipeline and the high temperature pipeline are only relative to the liquid temperature before and after heat exchange. Does not represent the meaning of absolute temperature;

The spray box 7 is arranged above the heat exchange tube 4 for flushing the lint on the heat exchange tube 4;

The condensate drain port 2, located at the bottom of the condenser 1, is used to discharge the condensed water in the condenser 1 and is connected to the drain pipe of the washing machine.

As shown in FIG. 2 , the washing and drying machine using the condenser of the present invention in this embodiment includes an outer cylinder 13, a motor 14, a drying air duct 17, a fan 15, and components of the condenser 1, etc. The fan 15 is arranged in At the front end of the drying air duct 17 , the condenser 1 assembly is arranged at the front end of the fan 15 . As shown in FIG. 1 , a heater 16 is provided inside the drying air duct 17 of the washing and drying machine. When drying clothes, the heater 16 is used to heat the air first. The hot air is driven into the washing tub by the fan 15 and heats the residual moisture on the clothes into water vapor. The water vapor enters the condenser with the hot air driven by the fan 15. 1. The water vapor is condensed into liquid water in the condenser 1 and drained through the condensation drain port 2 at the bottom of the condenser 1. The relatively dry air is heated by the heater 16 again and enters the washing tub to participate in the drying cycle. After a certain period of time, the laundry is dried.

The condenser assembly of this embodiment is shown in FIG. 4 . The condenser assembly includes a condenser 1 , a heat exchange tube 4 , a spray box 7 and the like. The upper part of the condenser 1 is an air outlet 9, and the air outlet 9 is connected to the inlet of the fan 15; the lower part of the condenser 1 is provided with an air inlet 8, and the air inlet 8 is connected to the air outlet of the outer cylinder 13. The bottom of the condenser 1 is provided with a condensation drain 2 for discharging the liquid water formed by the condensation of water vapor. The spray box 7 is arranged on the upper part of the condenser 1 . As shown in FIG. 3 , the heat exchange tubes 4 are in the form of several cylindrical springs arranged up and down, which are arranged in the cavity inside the condenser 1 , and the cooling water flows into the heat exchange tubes 4 through the liquid inlet 6 and flows through the internal passages. The liquid discharge port 3 is drained away, and the cooling water fully exchanges heat with the hot and humid airflow flowing in through the air inlet 8 of the condenser 1 when it flows through the heat exchange tube 4, and condenses the water vapor carried by the hot and humid airflow into liquid water, and the liquid water is condensed and drained. Port 2 flows out of condenser 1 and then out of the machine. During the whole process of condensation heat exchange, the low-temperature liquid in the heat exchange tube 4 of the condenser 1 flows downward from the top, and the moist hot air flows from the bottom to the top. This arrangement can improve the efficiency of heat exchange.

Further, as shown in the schematic diagram of the heat exchange tube shown in FIG. 5 , the liquid inlet 6 and the liquid discharge port 3 are respectively provided at the upper and lower ends thereof. The liquid inlet 6 is connected to the water inlet pipe of the washer-dryer, and the liquid discharge port 3 is connected to the drain pipe of the washer-dryer. The port 6 can also be connected with other heat exchange liquid medium to achieve the purpose of filling the heat exchange tube 4 with flowing low temperature liquid.

The heat exchange tube 4 is in the form of cylindrical springs arranged in multiple rows, so it has a large surface area, so the cooling water flowing through it can fully exchange heat with the hot and humid airflow, and has good condensation efficiency. In order to ensure the heat exchange efficiency of the heat exchange tube, the material of the heat exchange tube 4 of the present invention adopts copper, copper alloy, aluminum, aluminum alloy or other materials with good thermal conductivity. The outer diameter of the heat exchange tube is generally 2-15mm, and the preferred outer diameter is 4-8mm in this embodiment.

At the same time, the upper part of the condenser 1 assembly is provided with a spray box 7, which can use the water flow flowing into the water inlet pipe to wash the lint that may adhere to the heat exchange pipe. The heat exchange tubes 4 of the present invention are in the form of cylindrical springs arranged in multiple rows and have a large surface area. Therefore, when the cold water flows through the heat exchange tubes 4, it can fully exchange heat with the hot and humid airflow, and has high condensation efficiency. The washing and drying machine using the condensation method can significantly improve the condensation efficiency, greatly shorten the drying time, and at the same time have a good energy saving effect.

In this embodiment, especially for the distribution of the heat exchange tubes 4, a constant outer diameter is adopted, the thickness of the heat exchange tubes 4 is constant, and the pitch of the parallel cylindrical spring-shaped heat exchange tubes is from the outer side 19 to the inner side. 18 are gradually increasing. The distribution of the heat exchange tubes 4 makes the density of the heat exchange tubes 4 near the outer side 19 greater than the density of the heat exchange tubes 4 at the inner side 18 , and this change is a smooth transition.

The purpose of adopting such a design is to facilitate the uniform flow of the hot and humid air in the condenser 1 and increase the contact time and area between the hot and humid air and the heat exchange tube 4 . In the present invention, the condenser 1 is set as a cavity structure with the upper part being wide and the lower part being narrow, and the lower part is bent to one side. In such a cavity structure, the flow of the hot and humid air is not uniform, that is, the flow speed of the hot and humid air on the side of the outer side 19 is much faster than that on the side of the inner side 18 . The result of this is that, on the one hand, under the same conditions, the heat exchange tubes 4 on the outer side 19 of the condenser need to perform more heat exchange, so that the heat exchange efficiency of the heat exchange tubes 4 on the outer side decreases due to the rise in temperature; On the one hand, since most of the hot and humid air flows from the outer side 19, the heat exchange of the heat exchange tube on the inner side 18 side is incomplete, the surface area of the heat exchange tube 4 is not fully utilized, and the condensing capacity of the condenser 1 is not used to the maximum extent. .

Therefore, using the method in this embodiment, that is, the density of the heat exchange tubes 4 near the outer side 19 is greater than the density of the heat exchange tubes 4 at the inner side 18, on the one hand, the heat exchange tubes 4 are increased at the outer side. The number of heat exchange medium per unit area in the side 19 increases the heat exchange rate. On the other hand, by reducing the pitch of the cylindrical spring-shaped heat exchange tubes on the outer side 19, the hot and humid air in the condenser 1 is also reduced. The outer side 19 has a larger wind resistance when flowing, so that the air can flow evenly in the cavity of the condenser 1 as much as possible, so as to better utilize the heat exchange medium of the inner side 18 part. Finally, the condensation effect of the condenser is improved, and the drying efficiency of the drying washing machine is improved.

Example 2

The difference between this embodiment and Embodiment 1 is that the pitch of the cylindrical spring-shaped heat exchange tubes 4 in the same line is unchanged, the thickness of the heat exchange tubes is unchanged, and the outer diameter of the heat exchange tubes gradually decreases from the outer side 19 to the inner side 18 .

With such a distribution method of the heat exchange tubes 4, although the pitch of the cylindrical spring-shaped heat exchange tubes remains unchanged, since the outer diameter of the heat exchange tubes 4 gradually decreases from the outer side 19 to the inner side 18, not only the cylindrical spring-shaped heat exchange tubes are The gap between the adjacent two circles of the heat exchange tube 4 near the outer side 19 is smaller than the gap between the adjacent two circles of the heat exchange tube 4 on the inner side 18, so that the density of the heat exchange tube 4 near the outer side 19 is greater than The density of the heat exchange tubes on the inner side 18 also makes the surface area of the heat exchange tubes 4 on the outer side 19 larger than the surface area of the heat exchange tubes 4 on the inner side 18, which means that the heat exchange area of this part is further increased. , improve the heat exchange efficiency. At the same time, since the thickness of the heat exchange tube is kept constant, the process of gradually decreasing the outer diameter of the heat exchange tube is also the process of gradually decreasing the inner diameter of the heat exchange tube. In this way, the heat exchange area between the low temperature liquid flowing in the heat exchange tube near the outer side 19 and the heat exchange tube can be larger than the heat exchange area between the low temperature liquid and the heat exchange tube in the heat exchange tube near the inner side 18 . The heat exchange efficiency of the heat exchange tubes 4 on the outer side 19 where the hot and humid air mainly passes is further improved.

In this way, on the basis of the principle of Example 1, the surface area of the heat exchange tube near the outer side 19 and the heat exchange area between the internal low-temperature liquid and the heat exchange tube are further increased, so as to further improve the condensation effect of the condenser and improve the drying efficiency of the washer-dryer. the purpose of clothing efficiency.

Example 3

The difference between this embodiment and the above-mentioned embodiment is that the pitch of the cylindrical spring-shaped heat exchange tubes of the heat exchange tubes 4 in this embodiment is unchanged, the outer diameter of the heat exchange tubes 4 is unchanged, and the inner diameter of the heat exchange tubes 4 is changed from Downwards and upwards are gradually reduced.

As shown in FIGS. 1 to 5 , when drying clothes, the heater 16 is used to heat the air, and the hot air is driven by the fan 15 into the washing tub and heats the residual moisture on the clothes into water vapor. Driven by the fan 15 , the air inlet 8 , which is connected to the air outlet of the outer cylinder 13 from the lower part of the condenser 1 , enters the condenser 1 . At the same time, the cooling water flows into the inside of the heat exchange tube 4 through the liquid inlet 6 at the upper part of the condenser 1 and is drained from the liquid outlet 3 at the lower part of the condenser 1 along the internal passage. The hot and humid air flowing into the air inlet 8 of the device 1 is fully heat exchanged. During the whole process of condensation heat exchange, the low-temperature liquid in the heat exchange tube 4 of the condenser 1 flows downward from the top, and the moist hot air flows from the bottom to the top. This treatment is to perform the heat exchange process more efficiently, but at the same time it also has room for improvement.

In the process of this exchange, the heat exchange liquid in the heat exchange tube 4 continuously exchanges heat with the humid and hot air in the process of downward flow, absorbing a large amount of heat; at the same time, the lower heat exchange tube 4 is closer to the humid heat The air inlet 8, these two factors both cause the temperature of the heat exchange tube 4 at the lower part of the condenser 1 to be higher than the temperature of the upper heat exchange tube 4. In this way, the condensation effect at the bottom of the condenser will be greatly reduced, thereby reducing the condensation effect of the condenser as a whole. Moreover, due to the insufficient condensation effect at the bottom, part of the condensed water condensed from the upper part cannot be discharged from the condensation drain 2, but is blown back into the washing machine by the agitated moist and hot air, reducing the drying capacity of the washing machine. efficiency.

The heat exchange tube design of this embodiment is adopted, so that the pitch of the cylindrical spring-shaped heat exchange tube of the heat exchange tube 4 is unchanged, the outer diameter of the heat exchange tube 4 is unchanged, and the inner diameter of the heat exchange tube 4 gradually decreases from the lower part to the upper part. . This embodiment solves the problem of low condensation efficiency at the bottom of the condenser 1. By changing the different distributions of the inner diameters of the heat exchange tubes 4, the heat exchange in the heat exchange tubes 4 at the bottom of the condenser 1 can be achieved under the same appearance size. The heat exchange area between the medium and the heat exchange tube is larger than the heat exchange area between the heat exchange medium and the heat exchange tube in the upper heat exchange tube 4, so as to achieve the goal of improving the condensation effect of the washer-dryer condenser and improving the drying efficiency of the washer-dryer. .

Example 4

The difference between this embodiment and the above-mentioned embodiment is that the gap between the adjacent two circles of the cylindrical spring-shaped heat exchange tubes of the heat exchange tubes 4 in this embodiment is fixed, the thickness of the heat exchange tubes is unchanged, and the outer The diameter gradually decreases from descending to ascending.

Adopting the heat exchange tube design of this embodiment is equivalent to making the outer diameter and inner diameter of the heat exchange tubes in each row decrease synchronously from the downward to the upward, which not only increases the inner diameter of the bottom heat exchange tube 4, but also increases the bottom heat exchange medium. The heat exchange area with the inner wall of the heat exchange tube also increases the heat exchange area of the outer surface of the heat exchange tube of the bottom heat exchange tube 4 at the same time. In this way, the purpose of enhancing the heat exchange efficiency of the bottom heat exchange tube 4 is achieved, and to a greater extent, the above-mentioned disadvantages of lowering the condensation efficiency due to insufficient bottom heat exchange capacity are avoided. Finally, the goal of improving the condensation effect of the washer-dryer condenser and improving the drying efficiency of the washer-dryer is achieved. In this embodiment and embodiment 3, the reason why it is necessary to keep the gap between two adjacent turns of the cylindrical spring-shaped heat exchange tube of the heat exchange tube 4 fixed instead of adopting a constant pitch method is mainly to ensure the bottom blowing The hot and humid air can flow smoothly in the condenser, avoiding the problem that the bottom air intake resistance is too large due to reducing the gap of the heat exchange tube 4 in pursuit of the bottom condensation efficiency, which will affect the heat exchange efficiency.

Of course, by changing the size distribution of the inner diameter of the heat exchange tube 4, the method of changing the heat exchange area distribution between the condensing medium in the heat exchange tube 4 and the inner wall of the heat exchange tube can also be applied to more application scenarios at the same time. Repeat.

Example 5

As shown in FIG. 3, FIG. 4, FIG. 6 and FIG. 7, in this embodiment, the upper part of the heat exchange tube 4 has a spray box 7, the spray box 7 is a hollow cavity structure, and the top has a spray box to enter The water inlet 10, the water inlet 10 is connected with the water inlet pipeline of the washing machine, the bottom of the spray box 7 is an arc-shaped bottom surface that is arc-shaped downward in the length direction of the spray box, and a plurality of sprays are opened on the bottom surface. Water outlet 11. The length of the shower box 7 is less than the length of the top of the casing 5 in the same direction, and is close to the inner wall of the outer side of the casing 5 .

During the washing and drying process of the washing and drying machine, lint will fall off the clothes, and the lint will reach the heat exchange tube in the condenser with the circulating air flow, and some of the lint will adhere to the heat exchange tube. . In order to solve the problem of lint accumulation, the present invention is provided with a spray box 7 on the upper part of the heat exchange tube 4 for flushing the lint adhering to the heat exchange tube 4 . The upper end of the spray box 7 is provided with a spray box water inlet 10 for connecting the water inlet pipeline, and the lower end is provided with several spray water outlets 11 for spraying flushing water to the heat exchange tube.

In order to achieve the ideal flushing effect, the bottom of the spray box 7 is set as a downward convex arc in the length direction of the spray box, and the flushing water sprayed through the spray outlet 11 is fan-shaped and sprayed to the changing position. On the heat pipe 4, this setting method can make the volume of the spray box smaller, without affecting the flushing effect. The aperture of the spray outlet 11 is generally 1-10 mm, preferably 2-5 mm. Of course, the shape of the spray outlet can also be set to be square, rectangular or other shapes.

At the installation position of the spray box 7, the length of the spray box 7 is smaller than the length of the top of the casing 5 in the same direction, that is, in order to accommodate the lower spray box 7 and ensure that a part of the top of the condenser 1 is installed with a gap, the spray box The length of 7 is slightly smaller than the width of the condenser shell 5 ; at the same time, the spray box 7 is also close to the inner wall of the outer side 19 of the shell 5 . The purpose of this is based on the flow distribution of the hot and humid air in the condenser as mentioned in the previous example. Since the hot and humid air in the condenser 1 has more contact with the heat exchange tube 4 on the side near the outer side 19, the wire chips on this side are also significantly more than those near the inner side 18, so the installation space is limited. In this case, it is the best solution to improve the spraying effect that the installation position of the shower box 7 is as close as possible to the inner wall of the outer side 19 . Of course, it is also possible to adjust the distribution density of the spray water outlet 11 through the actual spray effect to achieve a more optimized effect.

In this embodiment, the lint that may be adhered to the heat exchange tube is washed with water flow, which not only avoids the decrease of heat exchange efficiency caused by the accumulation of lint, but also reduces the breeding of bacteria, making the internal environment of the washer and dryer healthier. .

Example 6

This embodiment discloses a washing machine, which has the high-efficiency condenser described in any one of the above-mentioned Embodiments 1 to 5. The washing machine of this embodiment uses a high-efficiency condenser to successfully realize the gas-liquid separation in the condensation process, overcomes the disadvantage of the existing condenser that directly condenses with sprayed cold water, and makes the heat exchange area in the heat exchange process fixed and Controllable. The washing machine of the embodiment uses the cylindrical spring-shaped heat exchange tube to increase the contact area between the heat exchange device and the moist and hot air; by combining the air flow direction in the inner cavity of the condenser, the density and density of the cylindrical spring-shaped heat exchange tube are comprehensively adjusted. Various methods such as outer diameter and inner diameter can fully and reasonably utilize the overall area of the heat exchanger, and greatly improve the heat exchange efficiency between the hot and humid air and the heat exchange tube. At the same time, a spray box can also be arranged on the upper part of the heat exchange tube of the washing machine of this embodiment, and the spray box uses water flow to wash the lint adhering to the heat exchange tube, so as to avoid the decrease of heat exchange efficiency caused by the accumulation of lint and the loss of heat. The growth of bacteria not only improves the heat exchange efficiency, shortens the overall drying time of the washer and dryer, but also improves the sanitary environment of the washer and dryer.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Within the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent examples of equivalent changes by using the above-mentioned technical content, but any content that does not depart from the technical solution of the present invention is based on the technical solution of the present invention. Substantially any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims (6)

1. The utility model provides a high-efficient condenser, is applied to the washing and drying machine which characterized in that: the condenser is a cavity structure which is wide at the top and narrow at the bottom and the lower part of which is bent to one side, and comprises:

the lower part of the shell is provided with an air inlet connected with the outer barrel of the washing machine, the top of the shell is provided with an air outlet connected with a fan in the drying air duct, the surface of the lower bent part with the smaller curvature radius is the inner side, and the surface of the lower bent part with the larger curvature radius is the outer side;

the heat exchange tubes are arranged in the shell, exchange heat with the damp and hot air, are hollow and are wound into a plurality of rows of cylindrical spring-shaped heat exchange tubes which are arranged in a plurality of rows up and down;

the spraying box is arranged above the heat exchange tube and used for washing thread scraps on the heat exchange tube;

the condensation water outlet is positioned at the bottom of the condenser and used for discharging condensed water in the condenser to be connected with a drain pipe of the washing machine;

the outer diameter of the heat exchange tube is unchanged, the thickness of the heat exchange tube is unchanged, and the pitches of the cylindrical spring-shaped heat exchange tubes in the same row are gradually increased from the outer side to the inner side;

or the pitches of the cylindrical spring-shaped heat exchange tubes in the same row are unchanged, the thicknesses of the heat exchange tubes are unchanged, and the outer diameters of the heat exchange tubes are gradually reduced from the outer side to the inner side;

or the pitch of the cylindrical spring-shaped heat exchange tube is unchanged, the outer diameter of the heat exchange tube is unchanged, and the inner diameter of the heat exchange tube is gradually reduced from bottom to top;

or the gap between two adjacent circles of the cylindrical spring-shaped heat exchange tube is fixed, the thickness of the heat exchange tube is unchanged, and the outer diameter of each row of heat exchange tubes is gradually reduced from bottom to top.

2. The condenser of claim 1, wherein: the outer diameter of the heat exchange tube is 2-15 mm.

3. The condenser of claim 1, wherein: the liquid inlet of the heat exchange tube is positioned at the upper end of the condenser and is connected with the low-temperature liquid pipeline, and the liquid outlet is positioned at the lower end of the condenser and is connected with the high-temperature liquid pipeline.

4. The condenser of claim 1, wherein: the upper part of the heat exchange tube is provided with a spraying box which is of a hollow cavity structure, the top of the spraying box is provided with a water inlet, and the bottom of the spraying box is an arc-shaped downwards-convex arc-shaped bottom surface in the length direction of the spraying box.

5. The condenser of claim 4, wherein: the length of the spraying box is smaller than the length of the top of the shell in the same direction, the spraying box is close to the inner wall of the outer side of the shell, and a plurality of spraying water outlets are formed in the bottom surface of the spraying box.

6. A washing machine having a condenser, characterized in that: a high efficiency condenser using the features of any of claims 1 to 5.

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