A deicing method and deicing device for a water tray of a dehumidifier

Abstract

The present invention discloses a deicing device for a water receiving tray of a dehumidifier, comprising a dehumidifier body, a first heat exchanger, a second heat exchanger, a compressor, a pressure reducer, a fan, a four-way reversing valve and a temperature detector arranged on the first heat exchanger are arranged in the dehumidifier body, the fan is located at the rear end of the second heat exchanger, the first heat exchanger is located at the front end of the second heat exchanger, the two ends of the first heat exchanger are respectively connected to the pressure reducer and one end of the four-way reversing valve, the two ends of the second heat exchanger are respectively connected to the pressure reducer and the other end of the four-way reversing valve, the other two ends of the four-way reversing valve are connected to the two ends of the compressor, a water receiving tray is arranged below the first heat exchanger and the second heat exchanger, and the compressor is located below the water receiving tray. The present invention also discloses a deicing method for a water receiving tray of a dehumidifier, and the present invention achieves energy-saving effect.

Description

Technical Field

[0001] The present invention relates to the technical field of dehumidifiers, and in particular to an ice melting method and an ice melting device for a water receiving tray of a dehumidifier. Background Art

[0002] A dehumidifier, also known as a moisture extractor, a dryer, or a dehumidifier, can generally be divided into two categories: household dehumidifiers and industrial dehumidifiers, and belongs to a part of the air conditioner family. Usually, a conventional dehumidifier consists of a compressor, a heat exchanger, a fan, a water container, a casing, and a controller.

[0003] Its working principle is as follows: The fan draws humid air into the machine and passes it through the heat exchanger. At this time, the water molecules in the air condense into water droplets, and the processed dry air is discharged outside the machine. In this way, the indoor humidity is maintained at an appropriate relative humidity through circulation. The refrigerant circulation process of the dehumidifier is as follows: The liquid refrigerant in the evaporator absorbs the heat in the air and starts to evaporate, the air cools and dehumidifies, the liquid refrigerant evaporates into a gas state, and then is sucked in and compressed by the compressor (the pressure and temperature increase). The gaseous refrigerant discharges heat through the condenser, the air heats up, the refrigerant condenses into a liquid, and then becomes a low-temperature and low-pressure refrigerant through throttling by the expansion valve and enters the evaporator to complete the refrigerant circulation process.

[0004] Currently, the existing dehumidifiers are prone to frosting when operating under low-temperature conditions and generally require defrosting. During the defrosting process, the water receiving tray is prone to icing due to the low temperature. Therefore, a heating wire is provided at the bottom of the water receiving tray to heat the water receiving tray to achieve the ice melting function. However, since a heating wire needs to be newly set up, it causes serious energy waste, and it is particularly important to design an ice melting method with good energy-saving effect. Summary of the Invention

[0005] The purpose of the present invention is to provide an ice melting method and an ice melting device for a water receiving tray of a dehumidifier, which utilize the heat of the compressor inside the dehumidifier to automatically melt the ice in the water receiving tray without additionally installing a heating wire to achieve an energy-saving effect, in order to solve the above-mentioned deficiencies of the existing technologies.

[0006] In order to achieve the above purpose, an ice melting method for a water receiving tray of a dehumidifier provided by the present invention specifically includes the following steps:

[0007] S1. Provide a dehumidifier, which includes a first heat exchanger, a second heat exchanger, a compressor, a pressure reducer, a fan, a four-way reversing valve, and a temperature detector provided on the first heat exchanger;

[0008] S2. Start the dehumidification operation when the dehumidifier is in the defrosting mode;

[0009] S3. Cumulatively count the number of dehumidification times through the formula Cd = Cd + 1 to obtain the defrost operation times Cd of the first heat exchanger for defrost operation;

[0010] S4. Obtain the preset defrost times Cs of the heat exchanger, and determine whether Cd ≥ Cs holds; if so, proceed to step S5; if not, return to step S2;

[0011] S5. Consider that the ice melting control of the water receiving tray starts, and at this time, start calculating the operation time Td of the ice melting control;

[0012] S6. Keep the compressor in the on state and the blower in the off state;

[0013] S7. Obtain the preset set ice melting control time Ts1, and determine whether Td ≥ Ts1 holds; if so, proceed to step S8; if not, return to step S6;

[0014] S8. Start measuring the temperature Tn of the first heat exchanger and compare it with the set temperature Ts of the first heat exchanger obtained, and determine whether Tn ≥ Ts holds; if so, proceed to step S9; if not, return to step S6;

[0015] S9. Keep the compressor in the off state;

[0016] S10. Start calculating the compressor stop time St;

[0017] S11. Determine whether Td ≥ Tx holds, where Tx is the preset ice melting control time Tx. If so, proceed to step S17; if not, proceed to step S12;

[0018] S12. Determine whether St ≥ Sx holds, where Sx is the preset compressor stop time Sx. If so, proceed to step S13; if not, proceed to step S9;

[0019] S13. Change the compressor from the stop state to the start state;

[0020] S14. Start calculating the compressor drive time Dt;

[0021] S15. Determine whether Td ≥ Tx holds, where Tx is the preset ice melting control time Tx. If so, proceed to step S17; if not, proceed to step S16;

[0022] S16. Determine whether Dt ≥ Dx holds, where Dx is the preset compressor drive time Dx. If so, proceed to step S10; if not, proceed to step S13;

[0023] S17. The ice melting control ends.

[0024] The present invention also discloses an ice melting device for a water receiving tray of a dehumidifier, which includes a dehumidifier body. Inside the dehumidifier body, there are a first heat exchanger, a second heat exchanger, a compressor, a pressure reducer, a blower, a four-way reversing valve, and a temperature detector provided on the first heat exchanger. The blower is located at the rear end of the second heat exchanger, and the first heat exchanger is located at the front end of the second heat exchanger. Two ends of the first heat exchanger are respectively connected to the pressure reducer and one end of the four-way reversing valve. Two ends of the second heat exchanger are respectively connected to the pressure reducer and the other end of the four-way reversing valve. The other two ends of the four-way reversing valve are connected to two ends of the compressor. A water receiving tray is provided below the first heat exchanger and the second heat exchanger, and the compressor is located below the water receiving tray.

[0025] Further, for the convenience of installation, the four-way reversing valve is located below the water receiving tray.

[0026] Further, to improve the ice melting effect, the first heat exchanger and the second heat exchanger are installed on an installation bracket, and the water receiving tray is integrally formed with the installation bracket.

[0027] Further, to improve the ice melting effect, a compressor accommodation cavity with both sides blocked is provided inside the installation bracket. After the compressor accommodation cavity is fitted with the outer shell of the dehumidifier body, a heat storage chamber is formed. The heat storage chamber is located below the water receiving tray, and an outlet communicating with the bottom of the water receiving tray is provided above the compressor accommodation cavity.

[0028] Further, to prevent heat dissipation and affect the ice melting effect, heat insulation plates for preventing heat dissipation are respectively provided on both sides of the bottom of the water receiving tray, and the heat insulation plates are located outside the outlet.

[0029] Further, to improve the ice melting efficiency and further achieve the energy-saving effect, the outlet diameter of the compressor accommodation cavity is equal to one-half of the bottom diameter of the water receiving tray.

[0030] An ice melting method and an ice melting device for a water receiving tray of a dehumidifier obtained by the present invention. By placing the compressor below the water receiving tray, and then using the heat generated during the operation of the compressor to melt the ice on the water receiving tray, the energy-saving effect of melting ice without adding a heater later is better. The present invention does not require a heating device such as a heater, and uses the waste heat of the compressor to melt the ice on the water receiving tray, enabling continuous dehumidification operation in a sub-zero environment. Since the compressor as the heat source is arranged below the dehumidification device (the device generating condensed water), the water receiving tray, and the drain outlet, the heat generated by the compressor can be used to melt the ice, and finally, on the basis of maintaining the reliability of the compressor, the compressor is heated to control the melting of the ice in the water receiving tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1It is a schematic flow chart of the upper part of the ice melting method for the water receiving tray of a dehumidifier in Embodiment 1;

[0032] Figure 2 It is a schematic flow chart of the lower part of the ice melting method for the water receiving tray of a dehumidifier in Embodiment 1;

[0033] Figure 3 It is a schematic connection diagram of the control part in the ice melting device for the water receiving tray of a dehumidifier in Embodiment 1;

[0034] Figure 4 It is a schematic internal structure diagram of the ice melting device for the water receiving tray of a dehumidifier in Embodiment 1 when the outer shell is removed Figure 1 ;

[0035] Figure 5 It is a schematic internal structure diagram of the ice melting device for the water receiving tray of a dehumidifier in Embodiment 1 when the outer shell is removed Figure 2 ;

[0036] Figure 6 It is a working state curve graph of ice melting for the compressor in Embodiment 1.

[0037] In the figure: the first heat exchanger 1, the second heat exchanger 2, the compressor 3, the pressure reducer 4, the fan 5, the four-way reversing valve 6, the water receiving tray 7, the mounting bracket 8, the compressor accommodation chamber 9, the heat storage bin 10, the outlet 11, the heat shielding plate 12, the temperature detector 13, the dehumidifier body 14. Specific Embodiment

[0038] For a clearer understanding of the technical solution of the present invention, the present invention will be further illustrated by examples in combination with the accompanying drawings.

[0039] Embodiment 1:

[0040] As Figure 1 - Figure 2 shown, a method for melting ice on the water receiving tray of a dehumidifier provided in this embodiment specifically includes the following steps:

[0041] S1. Provide a dehumidifier, which includes a first heat exchanger, a second heat exchanger, a compressor, a pressure reducer, a fan, a four-way reversing valve, and a temperature detector provided on the first heat exchanger;

[0042] S2. Start the dehumidification operation when the dehumidifier is in the defrosting mode;

[0043] S3. Accumulate the number of dehumidification times through the formula Cd = Cd + 1 to obtain the number of defrosting operation times Cd of the first heat exchanger for defrosting operation;

[0044] S4. Obtain the preset number of defrosting times Cs of the heat exchanger, and determine whether Cd ≥ Cs holds; if so, proceed to step S5; if not, return to step S2;

[0045] S5. It is considered that the ice melting control of the water receiving tray starts, and at this time, the operation time Td of the ice melting control begins to be calculated;

[0046] S6. Keep the compressor in the on state and the blower in the off state;

[0047] S7. Obtain the preset ice melting control time Ts1, and judge whether Td≥Ts1 holds; if so, go to step S8; if not, return to step S6;

[0048] S8. Start measuring the temperature Tn of the first heat exchanger, compare it with the set temperature Ts of the first heat exchanger obtained, and judge whether Tn≥Ts holds; if so, go to step S9; if not, return to step S6;

[0049] S9. Keep the compressor in the stopped state;

[0050] S10. Start calculating the compressor stop time St;

[0051] S11. Judge whether Td≥Tx holds, where Tx is the preset ice melting control time Tx; if so, go to step S17; if not, go to step S12;

[0052] S12. Judge whether St≥Sx holds, where Sx is the preset compressor stop time Sx; if so, go to step S13; if not, go to step S9;

[0053] S13. Change the compressor from the stopped state to the starting state;

[0054] S14. Start calculating the compressor driving time Dt;

[0055] S15. Judge whether Td≥Tx holds, where Tx is the preset ice melting control time Tx; if so, go to step S17; if not, go to step S16;

[0056] S16. Judge whether Dt≥Dx holds, where Dx is the preset compressor driving time Dx; if so, go to step S10; if not, go to step S13;

[0057] S17. The ice melting control ends.

[0058] In the present invention, first, data on the number of defrosting times when the water receiving tray freezes is obtained through experiments. Then, the number of defrosting times corresponding to the freezing of the water receiving tray is preset and stored. Later, during defrosting, the number of defrosting times is monitored in real time and compared with the preset number of defrosting times Cd. Once the real-time obtained number of defrosting times is greater than the preset number of defrosting times (i.e., the ice melting requirement is met), the compressor is started to generate heat. The rising heat melts the ice on the water receiving tray. At this time, the running time Td of ice melting is obtained and judged against the preset ice melting time, rather than calculating the temperature Tn of the first heat exchanger and comparing it with the preset temperature mechanical energy to determine whether ice melting can end. Moreover, in the whole control process of the present invention, the compressor is intermittently controlled to stop or start to extend the service life of the compressor, ensuring that the compressor is not in the starting state for a long time during ice removal. Therefore, the method of the present invention can realize judging the freezing state of the water receiving tray by real-time detecting the number of defrosting times. When the preset freezing requirement is reached, the compressor is controlled to start and stop intermittently to realize the automatic operation process of melting the ice on the water receiving tray, and there is no need to additionally install a heating device to realize the ice melting operation process of the water receiving tray. And by intermittently controlling the compressor, the problem of damage to the compressor due to long-term use is solved, and finally the service life of the compressor is extended.

[0059] As Figure 3 - 5 shown, this embodiment also discloses an ice melting device for the water receiving tray of a dehumidifier, including a dehumidifier body 14. Inside the dehumidifier body 14, there are a first heat exchanger 1, a second heat exchanger 2, a compressor 3, a decompressor 4, a blower 5, a four-way reversing valve 6, and a temperature detector 13 provided on the first heat exchanger 1. The blower 5 is located at the rear end of the second heat exchanger 2, the first heat exchanger 1 is located at the front end of the second heat exchanger 2. Two ends of the first heat exchanger 1 are respectively connected to the decompressor 4 and one end of the four-way reversing valve 6. Two ends of the second heat exchanger 2 are respectively connected to the decompressor 4 and the other end of the four-way reversing valve 6. The other two ends of the four-way reversing valve 6 are connected to two ends of the compressor 3. A water receiving tray 7 is provided below the first heat exchanger 1 and the second heat exchanger 2, and the compressor 3 is located below the water receiving tray 7.

[0060] Furthermore, for the convenience of installation, the four-way reversing valve 6 is located below the water receiving tray 7.

[0061] Furthermore, to improve the ice melting effect, the first heat exchanger 1 and the second heat exchanger 2 are installed on an installation bracket 8, and the water receiving tray 7 is integrally formed with the installation bracket 8.

[0062] Further, in order to improve the ice melting effect, a compressor accommodation cavity 9 with both sides blocked is provided in the mounting bracket 8. After the compressor accommodation cavity 9 is fitted with the outer shell of the dehumidifier body 14, a heat storage bin 10 is formed. The heat storage bin 10 is located below the water receiving tray 7, and an outlet 11 communicating with the bottom of the water receiving tray 7 is provided above the compressor accommodation cavity 9.

[0063] Further, to prevent heat dissipation and affect the ice melting effect, heat blocking plates 12 for preventing heat dissipation are respectively provided on both sides of the bottom of the water receiving tray 7. The heat blocking plates 12 are located outside the outlet 11.

[0064] Further, to improve the ice melting efficiency and further achieve an energy-saving effect, the diameter of the outlet 11 of the compressor accommodation cavity 9 is equal to one-half of the diameter of the bottom of the water receiving tray 7.

[0065] In the present invention, the compressor 3 is placed below the water receiving tray 7, and then the ice generated on the water receiving tray 7 is melted by the heat generated during the operation of the compressor 3, so as to achieve a better energy-saving effect of ice melting without the need to additionally install a heater later. The present invention does not require a heating device such as a heater, and uses the waste heat of the compressor to melt the ice on the water receiving tray, enabling continuous dehumidification operation in a sub-zero environment. Since the compressor serving as the heat source is provided below the dehumidification device (condensate generating device), the water receiving tray and the drain port, the heat generated by the compressor can be used for ice melting, and finally, on the basis of maintaining the reliability of the compressor, the compressor is heated to control the ice in the water receiving tray to melt.

[0066] During operation, when the ice removal requirement is met, after a certain period of dehumidification operation, the fan is turned off and only the compressor operates. Then, the compressor is stopped according to the temperature of the first heat exchanger. After that, the ON / OFF state is repeatedly switched. When the compressor is driven during intermittent operation, to prevent wear of the sliding part, the operation time should be more than 3 minutes and the winding temperature should be below 120°C. Therefore, in actual situations, the ON time and OFF time of the compressor need to be adjusted according to the ambient temperature and the type of compressor. In this embodiment, the start and stop times of the compressor during the ice melting process are as follows: when the ice melting requirement is met, the compressor is in the ON state at this time. The fan can be stopped at this time, and only the compressor is ensured to work. Then, by obtaining the temperature of the first heat exchanger 1, when the preset requirement is reached, the compressor is controlled to stop for 15 minutes, and then the compressor works for 3 minutes and then stops for 15 minutes in sequence until the ice melting ends, as Figure 6 shown.

Claims

1. A deicing method for a water tray of a dehumidifier, characterized in that: The specific steps include: S1. Provide a dehumidifier, the dehumidifier comprising a first heat exchanger, a second heat exchanger, a compressor, a pressure reducer, a fan, a four-way reversing valve, a temperature detector provided on the first heat exchanger, a water receiving tray and a mounting bracket, the first heat exchanger and the second heat exchanger are mounted on the mounting bracket, a compressor accommodating chamber blocked on both sides is provided in the mounting bracket, the compressor accommodating chamber cooperates with the outer shell of the dehumidifier body to form a heat storage bin, the heat storage bin is located below the water receiving tray, and the upper part of the compressor accommodating chamber is an outlet connected to the bottom of the water receiving tray; S2, dehumidification operation starts, when the dehumidifier is in defrost mode; S3. The number of dehumidification operations is accumulated by the formula Cd=Cd+1 to obtain the number of defrost operations Cd of the first heat exchanger defrost operation; S4, obtaining the preset defrosting times Cs of the heat exchanger, and judging whether Cd≧Cs is established; if so, proceeding to step S5; if not, returning to step S2; S5, it is considered that the water tray defrosting control has started, and the defrosting control operation time Td is calculated at this time; S6, keep the compressor in the on state and the blower in the off state; S7, obtaining the preset defrosting control time Ts1, and judging whether Td≧Ts1 is established; if so, proceeding to step S8; if not, returning to step S6; S8, start measuring the first heat exchanger temperature Tn, compare it with the obtained first heat exchanger set temperature Ts, and determine whether Tn≧Ts is established; if so, proceed to step S9; if not, return to step S6; S9, put the compressor in a stopped state; S10, start calculating the compressor stop time St; S11, judging whether Td≧Tx is established, wherein Tx is the preset defrosting control time Tx, if so, proceeding to step S17; if not, proceeding to step S12; S12, judging whether St≧Sx is established, where Sx is the preset compressor stop time Sx, if so, proceeding to step S13; if not, proceeding to step S9; S13, changing the compressor from a stopped state to a started state; S14, start calculating the compressor driving time Dt; S15, judging whether Td≧Tx is established, wherein Tx is the preset defrosting control time Tx, if so, proceeding to step S17; if not, proceeding to step S16; S16, judging whether Dt≧Dx is established, where Dx is the preset compressor driving time Dx, if so, proceeding to step S10; if not, proceeding to step S13; S17: defrosting control ends.

2. The deicing method for a water tray of a dehumidifier according to claim 1, characterized in that: The dehumidifier comprises a dehumidifier body. A first heat exchanger (1), a second heat exchanger (2), a compressor (3), a pressure reducer (4), a fan (5), a four-way reversing valve (6) and a temperature detector (13) arranged on the first heat exchanger (1) are arranged in the dehumidifier body (14). The fan (5) is located at the rear end of the second heat exchanger (2). The first heat exchanger (1) is located at the front end of the second heat exchanger (2). The two ends of the first heat exchanger (1) are respectively connected to the pressure reducer (4) and one end of the four-way reversing valve (6). The two ends of the second heat exchanger (2) are respectively connected to the pressure reducer (4) and the other end of the four-way reversing valve (6). The other two ends of the four-way reversing valve (6) are connected to the two ends of the compressor (3). A water receiving pan (7) is arranged below the first heat exchanger (1) and the second heat exchanger (2). The compressor (3) is located below the water receiving pan (7).

3. The deicing method for a water tray of a dehumidifier according to claim 2, characterized in that: The four-way reversing valve (6) is located below the water receiving tray (7).

4. A deicing method for a water tray of a dehumidifier according to claim 2 or 3, characterized in that: It also includes a mounting bracket (8), and the water receiving tray (7) and the mounting bracket (8) are integrally formed.

5. The deicing method for a water tray of a dehumidifier according to claim 4, characterized in that: Heat shields (12) for preventing heat diffusion are respectively provided on both sides of the bottom of the water receiving tray (7), and the heat shields (12) are located outside the outlet (11).

6. The deicing method for a water tray of a dehumidifier according to claim 5, characterized in that: The diameter of the outlet (11) of the compressor accommodating chamber is equal to half the diameter of the bottom of the water receiving tray (7).

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