A control method for a clothes processing device and a clothes processing device

Abstract

The present invention belongs to the technical field of clothing processing devices, and discloses a control method for a clothing processing device and a clothing processing device. The control method for the clothing processing device comprises: after the drying process starts, detecting the moisture content change value Δd between the front and rear sides of the evaporator in the heat pump drying system and the condensed water generation rate S; according to V=S / Δd, calculating the instantaneous mass flow rate V of the circulating air in the heat pump drying system; according to the preset mass flow rate V0 and the preset parameter a, when the instantaneous mass flow rate V is less than aV0, determining that the filter device is in a blocked state, and the clothing processing device uses the control method for the clothing processing device. The present invention has low detection cost, simple judgment process, timely and accurate judgment results, can effectively reduce the maintenance times of the filter device, and ensure the efficient and stable operation of the clothing processing device.

Description

Technical Field

[0001] The present invention relates to the technical field of clothing processing devices, and in particular to a control method of a clothing processing device and a clothing processing device. Background Art

[0002] During the drying process of the heat pump drying system in the existing clothing processing device, the lint will be hung on the filter device at the air outlet with the flow of air. As time goes by, the accumulation of lint will cause the filter screen in the filter device to be blocked, resulting in a decrease in the circulating air volume of the heat pump drying system and a deterioration in the drying performance.

[0003] In the existing heat pump drying system, the judgment on whether the filter device is blocked is not timely and accurate enough, which affects the drying performance of the clothes processing device. Summary of the invention

[0004] An object of the present invention is to provide a control method of a clothes processing device and a clothes processing device, which can timely and accurately determine whether a filter device is blocked.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A control method for a clothes processing device, comprising:

[0007] After the drying process begins, the moisture content change value Δd between the front and rear sides of the evaporator in the heat pump drying system and the condensed water generation rate S are detected;

[0008] According to V = S / Δd, the instantaneous mass flow rate V of the circulating air in the heat pump drying system is calculated;

[0009] According to the preset mass flow V0 and the preset parameter a, when the instantaneous mass flow V is less than aV0, it is determined that the filter device is in a blocked state.

[0010] Preferably, two temperature and humidity sensors are used to detect the temperature and humidity values ​​at the front and rear sides of the evaporator;

[0011] The moisture content d1 on the front side and the moisture content d2 on the rear side of the evaporator are calculated based on the detected temperature and humidity values;

[0012] According to Δd=d1-d2, the moisture content change value Δd between the front and rear sides of the evaporator is calculated.

[0013] Preferably, the circulating air in the heat pump drying system flows through the filter device, the evaporator and the condenser in sequence, a temperature and humidity sensor is arranged between the filter device and the evaporator, and another temperature and humidity sensor is arranged between the evaporator and the condenser.

[0014] Preferably, the circulating air in the heat pump drying system flows through the filter device, the evaporator and the condenser in sequence, a temperature and humidity sensor is arranged between the filter device and the evaporator, and another temperature and humidity sensor is arranged on the rear side of the condenser.

[0015] Preferably, during the drying process, the condensed water is collected in the water collection tank. When the condensed water in the water collection tank reaches a set amount m, a drainage pump connected to the water collection tank is started to drain the condensed water in the water collection tank.

[0016] Detect the time t when the condensed water in the sump reaches the set amount m;

[0017] According to S=m / t, the condensed water generation rate S is calculated.

[0018] Preferably, when it is determined that the filter device is in a clogged state, the filter device is cleaned after the drying process is completed.

[0019] Preferably, after the drying process is started, before the drying process begins, it is first determined whether the filter device is cleaned after being in a blocked state the previous time;

[0020] If the filter device was in a blocked state last time and was not cleaned, the clothes processing device enters a standby state.

[0021] Preferably, in the standby state, if the filter device is cleaned, the clothes processing device starts a drying process.

[0022] Preferably, the value range of the preset parameter a is 50%≤a≤70%.

[0023] A clothes processing device is controlled using the control method of the clothes processing device.

[0024] Beneficial effects of the present invention:

[0025] During the drying process, the instantaneous mass flow rate of the circulating air in the heat pump drying system is calculated based on the moisture content change between the front and rear sides of the evaporator and the condensed water generation rate. The filter device is judged to be in a blocked state based on the instantaneous mass flow rate. The detection cost is low, the judgment process is simple, and the judgment result is timely and accurate. It can effectively reduce the maintenance times of the filter device and ensure the efficient and stable operation of the clothing processing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a flow chart of a control method of a clothes processing device according to an embodiment of the present invention;

[0027] Figure 2 is a flow chart of another control method of a clothes processing device according to an embodiment of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the heat pump drying system and the temperature and humidity sensor according to the embodiment of the present invention;

[0029] Figure 4 Schematic diagram of the structure of the clothes processing device according to the embodiment of the present invention.

[0030] In the figure:

[0031] 100. heat pump drying system; 101. filtering device; 102. evaporator; 103. condenser;

[0032] 200, temperature and humidity sensor;

[0033] 300. Outer cylinder; 301. Water collecting tank;

[0034] 400, drainage pump;

[0035] 500. Heat pump drain pipe. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0040] like Figure 1-Figure 4 As shown, the present embodiment provides a control method for a clothing processing device, comprising: after the drying process starts, detecting and obtaining a moisture content change value Δd between the front and rear sides of an evaporator 102 in a heat pump drying system 100 and a condensed water generation rate S; according to V=S / Δd, calculating and obtaining an instantaneous mass flow rate V of circulating air in the heat pump drying system 100; according to a preset mass flow rate V0 and a preset parameter a, when the instantaneous mass flow rate V is less than aV0, determining that the filter device 101 is in a blocked state.

[0041] In the present invention, during the drying process, the instantaneous mass flow rate of the circulating air in the heat pump drying system 100 is calculated based on the moisture content change value between the front and rear sides of the evaporator 102 and the condensed water generation rate, and the filter device 101 is judged to be in a blocked state based on the instantaneous mass flow rate. The detection cost is low, the judgment process is simple, and the judgment result is timely and accurate, which can effectively reduce the maintenance frequency of the filter device 101 and ensure the efficient and stable operation of the clothing processing device.

[0042] Optionally, two temperature and humidity sensors 200 are used to detect the temperature and humidity values ​​of the front and rear sides of the evaporator 102; the moisture content d1 of the front side and the moisture content d2 of the rear side of the evaporator 102 are calculated based on the detected temperature and humidity values; according to Δd=d1-d2, the moisture content change value Δd between the front and rear sides of the evaporator 102 is calculated. The above-mentioned two temperature and humidity sensors 200 are set at low cost and the detection results are timely and reliable.

[0043] Specifically, when calculating the moisture content d on both sides of the evaporator 102 , the real-time dry-bulb temperature T and relative humidity φ data are first obtained through the temperature and humidity sensor 200 .

[0044] Then, according to the Hyland-Wexler formula, the saturated water vapor partial pressure P is calculated. ws (Pa).

[0045] In the Hyland-Wexler formula:

[0046] When the real-time dry-bulb temperature T is between -100℃ and 0℃:

[0047] LqCy ws =C1 / T+C2+C3T+C4T 2 +C5T 3 +C6T 4 +C7lnT

[0048] Among them, C1=-5.6745359E+03; C2=6.3925247E+00; C3=-9.6778430E-03; C4=6.2215701E-07; C5=2.0747825E-09; C6=-9.4840240E-13; C7=4.1635019E+00;

[0049] When the real-time dry-bulb temperature T is between 0℃ and 200℃:

[0050] LqCy ws =C8 / T+C9+C 10 T+C 11 T 2 +C 12 T 3 +C 13 oeLh

[0051] Among them, C8 = -5.8002206E+03; C9 = 1.3914993E+00; C 10 =-4.8640239E-02; C 11 =4.1764768E-05; C 12 =-1.4452093E-08; C 13 =6.5459673E+00.

[0052] Then, the relative humidity φ (unit %) and the saturated water vapor partial pressure P ws (Pa), calculate the actual partial pressure of water vapor P W (Pa):

[0053] P W =100φP ws

[0054] Finally, calculate the moisture content d (kg / kg dry air):

[0055] d=0.621945P W / (PP W )

[0056] Among them, P is the measured atmospheric pressure, which is 101325Pa.

[0057] In this embodiment, the circulating air in the heat pump drying system 100 flows through the filter device 101, the evaporator 102 and the condenser 103 in sequence, and one temperature and humidity sensor 200 is arranged between the filter device 101 and the evaporator 102, and the other temperature and humidity sensor 200 is arranged between the evaporator 102 and the condenser 103. The specific positions of the two temperature and humidity sensors 200 are arranged for the front and rear sides of the evaporator 102, and the temperature and humidity values ​​of the front and rear sides of the evaporator 102 can be accurately detected.

[0058] Optionally, during the drying process, condensed water is collected in the water collection tank 301. When the condensed water in the water collection tank 301 reaches a set amount m, the drainage pump 400 connected to the water collection tank 301 is started to drain the condensed water in the water collection tank 301. The time t when the condensed water in the water collection tank 301 reaches the set amount m is detected. According to S=m / t, the condensed water generation rate S is calculated. The above configuration makes the calculation of the condensed water generation rate S more convenient and reliable.

[0059] Specifically, a water level sensor is set at a set water level m in the water collection tank 301. When the condensed water reaches the set amount m, the water level sensor is triggered. The condensed water generation rate S can be calculated based on the time when the water level sensor is triggered after the condensed water in the water collection tank 301 is drained.

[0060] More specifically, the value range of the set amount m of condensed water is 50g-150g. In this embodiment, the set amount m of condensed water is 100g. The above setting not only avoids the single detection time being too long when the set amount m is too large, but also avoids the detection result being inaccurate when the set amount m is too small.

[0061] Optionally, when it is determined that the filter device 101 is in a blocked state, the filter device 101 is cleaned after the drying process is completed. The above arrangement reduces the frequency of cleaning the filter device 101 while ensuring the drying efficiency.

[0062] Specifically, when it is determined that the filter device 101 is in a blocked state, the clothing processing device issues a reminder alarm, which can be a warning light or a warning bell, which can remind the user to manually clean the filter on the filter device 101 after the drying process is completed; or, when it is determined that the filter device 101 is in a blocked state, after the drying process is completed, the clothing processing device itself controls the spray mechanism therein to spray and clean the filter on the filter device 101. The above-mentioned spray mechanism is a conventional setting in the field, and its specific structure and working principle will not be repeated here.

[0063] Optionally, after the drying program is started, before the drying process begins, it is first determined whether the filter device 101 was cleaned after being in a blocked state last time; if the filter device 101 was not cleaned after being in a blocked state last time, the clothes processing device enters a standby state, so that the drying process cannot be started. The above arrangement ensures that the drying process is started in a safe and efficient state, and ensures the safety of clothes and users.

[0064] In this embodiment, in the standby state, if the filter device 101 is cleaned, the clothes processing device starts to dry the clothes. The above arrangement makes the operation of the drying program safer and more efficient.

[0065] Specifically, the range of the preset parameter a is 50%≤a≤70%. In this embodiment, a is 60%, that is, when the instantaneous mass flow rate V<60%V0, the filter device 101 is determined to be in a blocked state. The above setting not only avoids the filter device 101 cleaning process being too high when the preset parameter a is too large, but also avoids the preset parameter a being too small, which affects the drying efficiency.

[0066] The preset mass flow rate V0 in this embodiment is obtained by detection and calculation when the filter device 101 is running in an initial unblocked state.

[0067] Embodiment 2

[0068] This embodiment provides a control method for a clothing processing device, which differs from the first embodiment in that: the circulating air in the heat pump drying system 100 flows through the filter device 101, the evaporator 102 and the condenser 103 in sequence, a temperature and humidity sensor 200 is arranged between the filter device 101 and the evaporator 102, and another temperature and humidity sensor 200 is arranged on the rear side of the condenser 103.

[0069] The above arrangement makes the obtained moisture content change value Δd more accurate, thereby making the subsequent instantaneous mass flow rate V of the circulating air in the heat pump drying system 100 calculated according to the condensed water generation rate S more accurate.

[0070] Embodiment 3

[0071] like Figure 3 and Figure 4 As shown, this embodiment provides a clothes processing device, which is controlled using the control method of the clothes processing device of any of the above embodiments.

[0072] Specifically, the clothing processing device in this embodiment is a drum dryer or a washer-dryer, and drying is performed by a heat pump drying system 100, wherein a water collection tank 301 is arranged at the bottom of the outer drum 300, and the heat pump drying system 100 is connected to the water collection tank 301 through a heat pump drain pipe 500.

[0073] More specifically, the preset mass flow rate V0 and the preset parameter a are both stored in the control system of the laundry processing device, wherein the preset mass flow rate V0 is detected and calculated when the filter device 101 is running in an initial unblocked state.

[0074] The two temperature and humidity sensors 200 are electrically connected to the control system, and the detected temperature and humidity values ​​are transmitted to the control system. The water level sensor in the sump 301 is electrically connected to the control system, and the detected trigger signal is transmitted to the control system. The control system calculates the instantaneous mass flow rate V according to a preset calculation formula and timing system, and compares the mass flow rate V with aV0. When the mass flow rate V is less than aV0, it is determined that the filter device 101 is in a blocked state, and an alarm is issued to remind the user to clean the filter device 101, or after the drying process is completed, the spray mechanism is controlled to clean the filter device 101.

[0075] The above control system is a conventional setting in this field, and its specific structure and working principle are not described here in detail.

[0076] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A control method for a clothes processing device, characterized in that: include: After the drying process begins, a moisture content change value Δd between the front and rear sides of the evaporator (102) in the heat pump drying system (100) and a condensed water generation rate S are detected; According to V=S / Δd, the instantaneous mass flow rate V of the circulating air in the heat pump drying system (100) is calculated; According to a preset mass flow rate V0 and a preset parameter a, when the instantaneous mass flow rate V is less than aV0, it is determined that the filter device (101) is in a blocked state; Detecting the temperature and humidity values ​​at the front and rear sides of the evaporator (102) by means of two temperature and humidity sensors (200); The moisture content d1 on the front side and the moisture content d2 on the rear side of the evaporator (102) are calculated based on the detected temperature value and humidity value; According to Δd=d1-d2, the moisture content change value Δd between the front and rear sides of the evaporator (102) is calculated; During the drying process, condensed water is collected in the water collecting tank (301). When the condensed water in the water collecting tank (301) reaches a set amount m, a drainage pump (400) connected to the water collecting tank (301) is started to drain the condensed water in the water collecting tank (301). Detecting the time t when the condensed water in the water collection tank (301) reaches a set amount m; According to S=m / t, the condensed water generation rate S is calculated.

2. The control method of the clothes processing device according to claim 1, characterized in that: In the heat pump drying system (100), circulating air flows through a filter device (101), an evaporator (102), and a condenser (103) in sequence; a temperature and humidity sensor (200) is arranged between the filter device (101) and the evaporator (102); and another temperature and humidity sensor (200) is arranged between the evaporator (102) and the condenser (103).

3. The control method of the clothes processing device according to claim 1, characterized in that: In the heat pump drying system (100), circulating air flows through a filter device (101), an evaporator (102), and a condenser (103) in sequence; a temperature and humidity sensor (200) is arranged between the filter device (101) and the evaporator (102); and another temperature and humidity sensor (200) is arranged at the rear side of the condenser (103).

4. The control method of the clothes processing device according to claim 1, characterized in that: When it is determined that the filter device (101) is in a clogged state, the filter device (101) is cleaned after the drying process is completed.

5. The control method of the clothes processing device according to claim 4, characterized in that: After the drying process is started, before the drying process begins, it is first determined whether the filter device (101) was previously blocked and whether a cleaning process was performed; If the filter device (101) is in a blocked state and no cleaning process is performed last time, the clothes processing device enters a standby state.

6. The control method of the clothes processing device according to claim 5, characterized in that: In the standby state, if the filter device (101) is cleaned, the clothes processing device starts the drying process.

7. The control method of the clothes processing device according to claim 1, characterized in that: The value range of the preset parameter a is 50%≤a≤70%.

8. A clothes processing device, characterized in that: The control is performed using the control method for the clothing processing device according to any one of claims 1 to 7.

Images