Heat exchange structure of clothes dryer

Abstract

The utility model discloses a clothes dryer heat exchange structure which comprises a compressor assembly, an evaporator and a condenser, and the evaporator and the condenser are located in a cavity of the same shell. An air outlet of the compressor assembly communicates with an air inlet of the evaporator through a connecting pipe, an outlet of the evaporator communicates with an inlet of the first electronic expansion valve through a connecting pipe, and an outlet of the first electronic expansion valve communicates with an inlet of the auxiliary heat exchanger through a connecting pipe. An outlet of the auxiliary heat exchanger communicates with an inlet of the second electronic expansion valve through a connecting pipe, an outlet of the second electronic expansion valve communicates with an inlet of the evaporator through a connecting pipe, and an outlet of the evaporator communicates with an inlet of the compressor assembly through a connecting pipe. The auxiliary heat exchanger, the first electronic expansion valve and the second electronic expansion valve are additionally arranged, automatic adjustment can be conducted according to the clothes drying condition, and therefore the clothes drying effect can be improved, and energy consumption can be reduced.

Description

Technical field:

[0001] The utility model relates to the technical field of clothes dryer processing equipment, and more particularly to a clothes dryer heat exchange structure. Background technology:

[0002] The main heat exchange components of existing heat pump dryers generally include a compressor, an evaporator, a condenser, a throttle valve and other structures;

[0003] It is generally only equipped with a condenser and an evaporator. When in use, its power consumption is certain, the cooling efficiency of its refrigerant is certain, the drying time is long and it cannot be automatically adjusted according to the drying situation, resulting in high energy consumption and limited energy saving effect. Utility model content:

[0004] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a heat exchange structure for a clothes dryer, which is equipped with an auxiliary heat exchanger, a first electronic expansion valve and a second electronic expansion valve, which can automatically adjust according to the drying situation, thereby improving the drying effect and reducing energy consumption.

[0005] The solution of the utility model to solve the technical problem is:

[0006] A heat exchange structure for a clothes dryer includes a compressor assembly, an evaporator, and a condenser, wherein the evaporator and the condenser are located in a cavity of the same shell;

[0007] The air outlet of the compressor assembly is connected to the air inlet of the condenser through a connecting pipe, the outlet of the condenser is connected to the inlet of the first electronic expansion valve through a connecting pipe, the outlet of the first electronic expansion valve is connected to the inlet of the auxiliary heat exchanger through a connecting pipe, the outlet of the auxiliary heat exchanger is connected to the inlet of the second electronic expansion valve through a connecting pipe, the outlet of the second electronic expansion valve is connected to the inlet of the evaporator through a connecting pipe, and the outlet of the evaporator is connected to the inlet of the compressor assembly through a connecting pipe.

[0008] An auxiliary fan is installed on the left side of the auxiliary heat exchanger, the right end of the auxiliary fan is an air inlet, the left end is an air outlet, and the air outlet faces the compressor assembly.

[0009] The condenser is located on the right side of the evaporator. The left end of the cavity of the shell where the evaporator and the condenser are located is the air inlet, and the right end is the air outlet. The main fan is installed at the air outlet.

[0010] A first temperature sensor is installed on the right side of the auxiliary heat exchanger.

[0011] A second temperature sensor is fixed on the outer side wall of the connecting pipe connected to the outlet of the evaporator.

[0012] A third temperature sensor is fixed on the outer side wall of the connecting pipe connected to the outlet of the auxiliary heat exchanger.

[0013] A fourth temperature sensor is fixed on the outer side wall of the connecting pipe connected to the air outlet of the compressor assembly.

[0014] The outstanding effects of the utility model are:

[0015] Compared with the prior art, the invention is equipped with an auxiliary heat exchanger, a first electronic expansion valve and a second electronic expansion valve, which can be automatically adjusted according to the drying conditions, thereby improving the drying effect and reducing energy consumption. Description of the drawings:

[0016] Figure 1 It is a simple schematic diagram of the utility model;

[0017] Figure 2 It is a partial structural diagram of the utility model;

[0018] Figure 3 It is a partial top view of the utility model;

[0019] Figure 4 It is a schematic diagram of the angle-changing local structure of the utility model. Specific implementation method:

[0020] For example, see Figures 1 to 4 As shown, a heat exchange structure of a clothes dryer includes a compressor assembly 40, an evaporator 20 and a condenser 30, wherein the evaporator 20 and the condenser 30 are in the same housing (not shown in the drawings, Figure 1 The cavity is simply shown in the figure), that is, it is fixed in the same cavity;

[0021] The air outlet of the compressor assembly 40 is connected to the air inlet of the condenser 30 through a connecting pipe, the outlet of the condenser 30 is connected to the inlet of the first electronic expansion valve 60 through a connecting pipe, the outlet of the first electronic expansion valve 60 is connected to the inlet of the auxiliary heat exchanger 10 through a connecting pipe, the outlet of the auxiliary heat exchanger 10 is connected to the inlet of the second electronic expansion valve 70 through a connecting pipe, the outlet of the second electronic expansion valve 70 is connected to the inlet of the evaporator 20 through a connecting pipe, and the outlet of the evaporator 20 is connected to the inlet of the compressor assembly 40 through a connecting pipe;

[0022] The compressor assembly 40 and the auxiliary heat exchanger 10 are located outside the cavity of the housing, and the first electronic expansion valve 60 and the second electronic expansion valve 70 are located outside the cavity of the housing.

[0023] Furthermore, an auxiliary fan 11 is installed on the left side of the auxiliary heat exchanger 10. The auxiliary fan 11 can be fixed on the left side of the auxiliary heat exchanger 10 or fixed on the shell on which the auxiliary heat exchanger 10 is installed and is located on the left side of the auxiliary heat exchanger 10. The right end of the auxiliary fan 11 is the air inlet and the left end is the air outlet, and the air outlet faces the compressor assembly 40.

[0024] Furthermore, the condenser 30 is located on the right side of the evaporator 20. The left end of the cavity of the shell where the evaporator 20 and the condenser 30 are located is the air inlet, and the right end is the air outlet. The main fan 80 is installed at the air outlet.

[0025] Furthermore, a first temperature sensor 1 is installed on the right side of the auxiliary heat exchanger 10. The first temperature sensor 1 can be fixed at the air inlet at the right end of the shell on which the auxiliary heat exchanger 10 is installed, or installed at the air outlet of the shell facing the right side of the auxiliary heat exchanger 10.

[0026] Furthermore, a second temperature sensor 2 is fixed on the outer wall of the connecting pipe connected to the outlet of the evaporator 20 .

[0027] Furthermore, a third temperature sensor 3 is fixed on the outer side wall of the connecting pipe connected to the outlet of the auxiliary heat exchanger 10 .

[0028] Furthermore, a fourth temperature sensor 4 is fixed on the outer side wall of the connecting pipe connected to the air outlet of the compressor assembly 40.

[0029] A fifth temperature sensor 5 is fixed to the outer wall of the connecting pipe connected to the outlet of the condenser 30. A sixth temperature sensor 6 is fixed to the top surface of the air outlet at the right end of the cavity where the evaporator 20 and the condenser 30 are installed. A seventh temperature sensor 7 and a humidity sensor 8 are fixed to the top surface of the left end of the cavity.

[0030] All electrical components are electrically connected to the control host through electrical connecting lines. The control host is installed on the shell of the dryer body. This is a conventional structure and will not be described in detail here.

[0031] When in use, this embodiment is installed on the housing of the dryer body.

[0032] The working principle of this embodiment is as follows:

[0033] When the machine is started up, the main ventilation fan 80 is turned on. When the weather is hot, such as above 30°C, the auxiliary ventilation fan 11 is turned on at the same time. At this time, the first electronic expansion valve 60 is opened to 250 steps (the electronic expansion valve control mode is that all are opened for 500 steps when powered on, and then reduced from 500 steps to 250 steps), and the second electronic expansion valve 70 is opened to 150 steps (the electronic expansion valve control mode is that all are opened for 500 steps when powered on, and then reduced from 500 steps to 150 steps). After 5 seconds, the compressor assembly 40 starts, and the temperature of each point is determined after running for 1 minute.

[0034] When the temperature detected by the first temperature sensor 1 is ≥ the temperature detected by the third temperature sensor 3, when the exhaust temperature of the compressor assembly 40, that is, the temperature detected by the fourth temperature sensor 4, is <105°C (in this embodiment, the temperature of the compressor assembly 40 is controlled below 105°C to prevent shutdown due to excessive temperature), the opening of the first electronic expansion valve 60 is closed, and is reduced by 20 steps each time. The judgment is made every 3 minutes, and then the opening of the first electronic expansion valve 60 is reduced once, that is, the opening of the first electronic expansion valve 60 is reduced by 20 steps every 3 minutes. During this process, the second electronic expansion valve 70 is not adjusted, and during this process, the opening of the first electronic expansion valve 60 cannot be less than the opening of the second electronic expansion valve 70. If the opening of the first electronic expansion valve 60 = the opening of the second electronic expansion valve 70, the opening of the second electronic expansion valve 70 is synchronously reduced to ensure that the opening of the second electronic expansion valve 70 is always less than the opening of the first electronic expansion valve 60.

[0035] At this time, the auxiliary heat exchanger 10 is used as an evaporator, and cooperates with the evaporator 20 to achieve two-level regulation, that is, the refrigerant enters the auxiliary heat exchanger 10 from the condenser 30 through the throttling of the first electronic expansion valve 60, and realizes the first evaporation cooling. At the same time, the air passing through the auxiliary heat exchanger 10 is quickly cooled and blown onto the compressor assembly 40, which can cool the compressor assembly 40 (because the temperature detected by the first temperature sensor 1 is greater than or equal to the temperature detected by the third temperature sensor 3, it means that the external temperature is high, and after being blown into the compressor assembly 40, the compressor assembly 40 can be quickly cooled). The temperature of the compressor assembly 40 is raised too high to prevent the temperature from exceeding 105°C, and cooling or insulation is required to prevent excessive temperature rise), and then a second throttling is performed through the second electronic expansion valve 70. Then, the air enters the evaporator 20 for a second evaporation and cooling, so that the refrigerant in the evaporator 20 absorbs a large amount of heat, greatly reducing the wind entering from the air inlet at the left end of the cavity, causing a large amount of water vapor in the wind to condense into water droplets and fall into the water receiving trough provided below the cavity, and is discharged regularly (it can be discharged by a water pump, which will not be described in detail here).

[0036] The auxiliary heat exchanger 10 is used as an evaporator together with the evaporator 20 to greatly accelerate the condensation effect, so that the water vapor in the air passing through the evaporator 20 quickly condenses into water droplets, and the openings of the first electronic expansion valve 60 and the second electronic expansion valve 70 are small, and the pressure increases, so that the compressor assembly 40 has high compression (at this time, the power of the compressor assembly 40 gradually increases, and the energy consumption increases), and the temperature of the refrigerant coming out is high, which also increases the temperature of the condenser 30, so that the temperature of the air passing through the evaporator 20 rises rapidly after passing through the condenser 30, and the temperature is high when it comes out from the air outlet of the cavity and enters the drying cylinder of the dryer shell, which can quickly dry the clothes inside, greatly improving the drying effect and efficiency, shortening the drying time, and reducing energy.

[0037] During operation, when the temperature detected by the fourth temperature sensor 4 is ≥105°C, the opening of the first electronic expansion valve 60 is increased by 30 steps. This is determined every 3 minutes, and the opening of the first electronic expansion valve 60 is then increased once. That is, the opening of the first electronic expansion valve 60 is determined to be increased once every 3 minutes. During the increase process, if the temperature detected by the fourth temperature sensor 4 is greater than 110°C, any other logic is ignored and the opening of the first electronic expansion valve 60 is quickly adjusted to 500 steps. After 5 minutes of operation, if the temperature detected by the fourth temperature sensor 4 is still greater than 110°C, the opening of the second electronic expansion valve 70 is increased by 30 steps to 200 steps. After 2 minutes, it is determined again that the temperature detected by the fourth exhaust temperature sensor 4 is greater than 110°C, and the opening of the second electronic expansion valve 70 is increased by 30 steps. This is adjusted every 2 minutes until the temperature detected by the fourth temperature sensor 4 is less than 105°C. This setting is to prevent the compressor assembly 40 from being shut down and damaged due to excessive temperature (at this time, the operating power of the compressor assembly 40 is gradually reduced, and the energy consumption is gradually reduced).

[0038] When the temperature detected by the first temperature sensor 1 is less than the temperature detected by the third temperature sensor 3 (i.e., the external temperature is lower than the internal temperature), and at the same time, the temperature detected by the fourth temperature sensor 4 is less than 105°C, the opening of the second electronic expansion valve 70 is reduced (the opening of the first electronic expansion valve 60 remains unchanged. At this time, the auxiliary heat exchanger 10 is used as a condenser, which can increase the temperature of the air passing through the auxiliary heat exchanger 10 so that the air blown onto the compressor assembly 40 can heat up or keep the compressor assembly 40 warm to prevent it from being cooled by the cold wind from the outside, thereby accelerating the compressor assembly 40 to quickly enter the compression state and improve the compression effect). The opening is reduced by 15 steps each time, and the judgment is made every 3 minutes. After that, the opening of the second electronic expansion valve 70 is reduced once, that is, the opening of the second electronic expansion valve 70 is reduced by 15 steps every 3 minutes. During this process, the first electronic expansion valve 60 remains unchanged. When the second electronic expansion valve 70 reaches 100 steps and the second electronic expansion valve 70 no longer decreases, the opening of the first electronic expansion valve 60 needs to be decreased, that is, the opening of P1 needs to be decreased by 30 steps, and the adjustment is performed every 3 minutes.

[0039] When the temperature detected by the fourth temperature sensor 4 is ≥105°C, the opening of the second electronic expansion valve 70 is increased by 30 steps, and the judgment is made every 3 minutes. Thereafter, the opening of the second electronic expansion valve 70 is increased once, that is, the opening of the second electronic expansion valve 70 is increased once every 3 minutes. During the increase process, if the temperature detected by the fourth temperature sensor 4 is greater than 110°C, any other logic is ignored and the opening of the first electronic expansion valve 60 is quickly adjusted to 500 steps. After running for 5 minutes, if the exhaust temperature is still greater than 110°C, the opening of the second electronic expansion valve 70 is increased by 30 steps. After 2 minutes, it is judged again that the temperature detected by the fourth temperature sensor 4 is greater than 110°C, and the opening of the second electronic expansion valve 70 is increased by 30 steps. The adjustment is made every 2 minutes until the temperature detected by the fourth temperature sensor 4 is less than 105°C.

[0040] The temperature of the sixth temperature sensor 6 is related to the air outlet temperature. The detected temperature continues to increase, indicating that the temperature of the condenser 30 is high, which indirectly reflects that the temperature of the compressor assembly 40 is high. It is necessary to observe whether the detected temperature of the fourth temperature sensor 4 is <105°C.

[0041] The humidity sensor 8 senses the humidity. When the humidity is greater than 70%, while ensuring that the detection temperature of the fourth temperature sensor 4 is less than 105°C, it is necessary to gradually reduce the opening of the first electronic expansion valve 60 and the opening of the second electronic expansion valve 70 so that the water vapor in the air blowing through the evaporator 20 quickly condenses into water droplets, thereby quickly dehumidifying.

[0042] When this embodiment is in use, the exhaust temperature of the compressor assembly 40, that is, the detection temperature of the fourth temperature sensor 4, is generally less than 105°C when it is just turned on. At this time, the power of the compressor assembly 40 continues to increase and is in a rapid drying state. Then, as the clothes are dried, the temperature detected by the sixth temperature sensor 6 continues to increase, and the temperature at the compressor assembly 40 also continues to increase. When the detection temperature of the fourth temperature sensor 4 is ≥105°C, it is necessary to increase the opening of the first electronic expansion valve 60 and the opening of the second electronic expansion valve 70. In this process, the energy consumption of the compressor assembly 40 is reduced, and energy saving is achieved while ensuring drying, with good energy saving effect.

[0043] In this embodiment, the opening of the first electronic expansion valve 60 and the second electronic expansion valve 70 is adjusted by the temperature sensed by the corresponding temperature sensor, thereby realizing the operation of the compressor assembly 40, changing its energy consumption, realizing dynamic adjustment, ensuring that energy consumption is reduced while drying clothes, and achieving energy-saving effects.

[0044] Finally, the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the scope of patent protection of the present invention should be defined by the claims.

Claims

1. A heat exchange structure for a clothes dryer, comprising a compressor assembly (40), an evaporator (20) and a condenser (30), characterized in that: The evaporator (20) and the condenser (30) are located in a cavity of the same housing; The air outlet of the compressor assembly (40) is connected to the air inlet of the condenser (30) through a connecting pipe, the outlet of the condenser (30) is connected to the inlet of the first electronic expansion valve (60) through a connecting pipe, the outlet of the first electronic expansion valve (60) is connected to the inlet of the auxiliary heat exchanger (10) through a connecting pipe, the outlet of the auxiliary heat exchanger (10) is connected to the inlet of the second electronic expansion valve (70) through a connecting pipe, the outlet of the second electronic expansion valve (70) is connected to the inlet of the evaporator (20) through a connecting pipe, and the outlet of the evaporator (20) is connected to the inlet of the compressor assembly (40) through a connecting pipe; The compressor assembly (40) and the auxiliary heat exchanger (10) are located outside the cavity of the housing.

2. The heat exchange structure of a clothes dryer according to claim 1, characterized in that: The first electronic expansion valve (60) and the second electronic expansion valve (70) are located outside the cavity of the shell.

3. The heat exchange structure of a clothes dryer according to claim 1, characterized in that: An auxiliary fan (11) is installed on the left side of the auxiliary heat exchanger (10), the right end of the auxiliary fan (11) is an air inlet, the left end is an air outlet, and the air outlet faces the compressor assembly (40).

4. The heat exchange structure of a clothes dryer according to claim 1, characterized in that: The condenser (30) is located on the right side of the evaporator (20). The left end of the cavity of the shell where the evaporator (20) and the condenser (30) are located is an air inlet, and the right end is an air outlet. A main fan (80) is installed at the air outlet.

5. The heat exchange structure of a clothes dryer according to claim 3, characterized in that: A first temperature sensor (1) is installed on the right side of the auxiliary heat exchanger (10).

6. The heat exchange structure of a clothes dryer according to claim 1, characterized in that: A third temperature sensor (3) is fixed on the outer side wall of the connecting pipe connected to the outlet of the auxiliary heat exchanger (10).

7. The heat exchange structure of a clothes dryer according to claim 1, characterized in that: A fourth temperature sensor (4) is fixed on the outer side wall of the connecting pipe connected to the air outlet of the compressor assembly (40).

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