Heating cleaning method of cleaning machine and cleaning machine

Abstract

The present invention relates to a heating and cleaning method for a cleaning machine, which is characterized in that: in the process of controlling the cleaning machine to perform heating work, the temperature data T of the water in the cleaning machine is collected in real time, and then a temperature curve is obtained according to the temperature data T, and a real-time temperature rise coefficient Ar is calculated according to the temperature curve, Ar=dT / dt, where t represents time; and the timing of stopping heating of the cleaning machine is controlled according to the temperature rise coefficient Ar. The heating and cleaning method for the cleaning machine can calculate the temperature rise coefficient that characterizes the temperature rise speed, and control heating according to the temperature rise coefficient, thereby realizing an intelligent balance between heating energy consumption and cleaning effect. The present invention also relates to a cleaning machine using the heating and cleaning method.

Description

Technical Field

[0001] The invention relates to a heating cleaning method for a cleaning machine and also relates to a cleaning machine applying the heating working method. Background Art

[0002] The washing program design of existing washing machines often relies on laboratory conditions, and the temperature in the laboratory is usually maintained within a relatively comfortable and stable temperature range of 23±2℃. When the washing machine is used at the user's home, the ambient temperature of the user's home varies greatly. For the heating and cleaning program that does not adopt temperature control measures, as the temperature changes throughout the year, the energy consumption of the heating and cleaning program in the washing machine is often far from the nominal value. In order to ensure the consistency of power consumption during the heating and cleaning process of cleaning, a relatively fixed heating time is generally set. However, corresponding to different ambient temperatures, the same heating time cannot obtain the same operating temperature, resulting in huge differences in the heating and cleaning work of the washing machine with the ambient temperature. In order to achieve relatively consistent energy consumption of the washing sequence of the washing machine, it is impossible to optimize the cleaning effect according to the actual environment. The existing timing logic of the washing machine is not conducive to the reasonable balance of washing effect and energy consumption in different environments in the user's home.

[0003] The Chinese invention patent application "Dishwasher heating protection method, device, and computer-readable storage medium" with publication number CN108742414A (application number 201810506362.6) proposes that when the dishwasher enters the heating and washing process, the current water temperature of the dishwasher is obtained, and it is determined whether the water temperature reaches the preset target temperature, and then the operation of the heating plate is controlled to ensure that the temperature of the washing water is heated to the target temperature. This method has the aforementioned problem of energy consumption far from the nominal value. Especially in extremely low temperature environments such as winter, the heat dissipation of the washing machine itself is also large during the heating and washing process. The energy consumption required to heat the washing machine to the target temperature far exceeds the expected energy consumption of the washing machine. It often heats and dissipates heat at the same time, and may even fail to reach the target temperature, affecting the normal cleaning of the washing machine or issuing a false fault alarm. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a heating and cleaning method for a cleaning machine that can calculate a temperature rise coefficient that characterizes the temperature rise rate, and control heating according to the temperature rise coefficient, thereby achieving an intelligent balance between heating energy consumption and cleaning effect.

[0005] The second technical problem to be solved by the present invention is to provide a cleaning machine using the aforementioned heating cleaning method in view of the above-mentioned prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a heating cleaning method of a cleaning machine, characterized in that: in the process of controlling the cleaning machine to perform heating work, the temperature data T of the water in the cleaning machine is collected in real time, and then a temperature curve is obtained according to the temperature data T, and a real-time temperature rise coefficient Ar is calculated according to the temperature curve, Ar=dT / dt, where t represents time;

[0007] The timing for stopping heating of the cleaning machine is controlled according to the temperature rise coefficient Ar.

[0008] In order to obtain more accurate and direct heat absorption in real time, and then control the heating of the cleaning machine according to the heat absorption, when the cleaning machine needs to perform heating and cleaning work, the heating coefficient A of the cleaning machine is calculated, A = P / cm, P is the heating power, c is the specific heat capacity of water, and m is the mass of water;

[0009] When controlling the cleaning machine to perform heating, the heat absorption capacity parameter η is calculated in real time, η=Ar / A, and η is compared with a preset heat absorption capacity critical value η0. If η≤η0, the cleaning machine is controlled to stop heating.

[0010] Preferably, 0.5≤η0<1.

[0011] In order to obtain heat dissipation information more directly and then control the low-mass heating work according to the heat dissipation situation, when the cleaning machine needs to perform heating cleaning work, the heating coefficient A of the cleaning machine is calculated, A=P / cm, P is the heating power, c is the specific heat capacity of water, and m is the mass of water; the temperature rise coefficient curve Ar=Ae is fitted according to the calculated temperature rise coefficient -Bt ; B is the heat dissipation coefficient that characterizes the heat dissipation rate;

[0012] B is compared with a preset dissipation coefficient threshold value B0, and if B≥B0, the cleaning machine is controlled to stop heating.

[0013] In order to effectively estimate the heating time and improve the consistency of the cleaning machine's heating work, when the cleaning machine needs to perform heating cleaning work, the heating coefficient A of the cleaning machine is calculated, A = P / cm, P is the heating power, c is the specific heat capacity of water, and m is the mass of water; the temperature rise coefficient curve Ar = Ae is fitted according to the calculated temperature rise coefficient -Bt ; B is the heat dissipation coefficient that characterizes the heat dissipation rate;

[0014] The preset critical value of heat absorption capacity η0=Ar0 / A, where Ar0 is the critical temperature rise coefficient, controls the heating time of the cleaning machine during the heating and cleaning work to be t0, t0=-lnη0 / B.

[0015] Preferably, 0.5≤η0<1.

[0016] The technical solution adopted by the present invention to solve the above second technical problem is: a cleaning machine, characterized in that: the above-mentioned heating working method is applied.

[0017] Compared with the prior art, the advantages of the present invention are: the heating and cleaning method of the cleaning machine in the present invention can judge the absorption of heating energy during the heating and cleaning process of the cleaning machine according to the calculated temperature rise coefficient Ar used to characterize the heating rate, and then judge the conversion of heating energy absorption into heating effect during the heating and cleaning process. In this way, when the absorption conversion rate of heating energy is poor, the heating can be controlled to stop, avoiding the heating energy consumption being offset by a large amount of heat dissipation, reducing the heating power consumption of low energy conversion, and eliminating the heating process with low heating efficiency during the heating and cleaning process from the energy supply source, so that the heating energy consumption is more reasonable, and an intelligent balance between energy consumption and cleaning effect during the heating and cleaning process is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a flow chart of the heating cleaning method of the cleaning machine in the first embodiment of the present invention.

[0019] Figure 2 This is a flow chart of a heating cleaning method of a cleaning machine in Embodiment 2 of the present invention.

[0020] Figure 3 This is a flow chart of the heating cleaning method of the cleaning machine in Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings.

[0022] When a cleaning machine is performing cleaning work, it usually heats the water entering the cleaning machine, and then uses hot water for cleaning to improve the cleaning work. When designing a heating cleaning program, the target temperature or heating time is usually preset to determine the time to stop the heating work. After the water in the cleaning machine is heated, the cleaning work can obtain a better cleaning effect. However, for cleaning machines used in low ambient temperatures, the machine will heat and dissipate heat at the same time. In particular, when the water temperature is heated to a certain temperature, the heating energy consumption can only achieve a very limited increase in the water temperature due to the large heat dissipation caused by the low ambient temperature. At this time, the heating energy consumption cannot be fully utilized, which has little effect on improving the cleaning effect and will result in excessive heating energy consumption.

[0023] In view of this situation, the following heating cleaning method for a cleaning machine is proposed to achieve an intelligent balance between energy consumption and cleaning effect during the heating cleaning process of the cleaning machine.

[0024] Embodiment 1

[0025] like Figure 1As shown, the heating cleaning method of the cleaning machine in this embodiment includes the following steps.

[0026] When the cleaning machine needs to perform heating and cleaning work, the heating coefficient A of the cleaning machine is calculated, A=P / cm, P is the heating power, c is the specific heat capacity of water, and m is the mass of water. Usually, for the heating and cleaning program set in the cleaning machine, the corresponding heating power will be set, and the heating work is relatively fixed, that is, P. At the same time, the amount of water required for this heating and cleaning work is usually relatively fixed, and then the mass of water m is also relatively fixed. C as the specific heat capacity of water is a known constant. Therefore, when the cleaning machine needs to perform heating and cleaning work, the heating coefficient A of the cleaning machine for this heating and cleaning work can be calculated.

[0027] In the process of controlling the cleaning machine to perform heating work, the temperature data T of the water in the cleaning machine is collected in real time, and then the corresponding temperature curve of the cleaning machine during heating and cleaning can be fitted according to the collected temperature data T. The real-time temperature rise coefficient Ar is calculated according to the temperature curve, Ar = dT / dt, where t represents time, and Ar represents the slope of the temperature change of the water in the cleaning machine over time. Since it is in the heating process, the water in the cleaning machine will heat up rapidly at the beginning. As the temperature rises, the water temperature in the cleaning machine is much higher than the external environment temperature. Based on the heat exchange between the external environment, the heating rate of the water in the cleaning machine gradually decreases, that is, the proportion of heating power consumption used to increase the water temperature gradually decreases. Therefore, the timing of stopping the heating of the cleaning machine can be controlled according to the temperature rise coefficient Ar, thereby reducing the heating power consumption that is not very effective.

[0028] Specifically, in this embodiment, the heat absorption capacity parameter η is calculated in real time, η = Ar / A, the larger η is, the stronger the water in the washing machine is able to absorb the heat from heating. When η drops to a certain value, the water in the washing machine is already very limited in its ability to absorb the heat from heating. At this time, if heating is continued, the contribution of heating power consumption to temperature rise is very small, and is basically used for heat dissipation. At this time, continuing the heating work will cause a relatively serious waste of power consumption. In this way, a heat absorption capacity critical value η0 is preset, and η is compared with the preset heat absorption capacity critical value η0. If η≤η0, the washing machine is controlled to stop heating. Specifically, η0 can be selected within the range of 0.5≤η0<1 as needed.

[0029] The heating and cleaning method of the cleaning machine can calculate the heat absorption capacity parameter η of the cleaning machine during the heating and cleaning process according to the calculated temperature rise coefficient Ar used to characterize the heating rate, and then use the heat absorption capacity parameter η to judge the absorption capacity of the cleaning machine for heating energy during the heating and cleaning process, and then judge the conversion of the heating energy absorption into the heating effect during the heating and cleaning process. In this way, when the absorption conversion rate of the heating energy is poor, the heating can be controlled to stop, avoiding the heating energy consumption being offset by a large amount of heat dissipation, reducing the heating power consumption of low energy conversion, and eliminating the heating process with low heating efficiency during the heating and cleaning process from the energy supply source, so that the heating energy consumption is more reasonable, and an intelligent balance between energy consumption and cleaning effect during the heating and cleaning process is achieved.

[0030] The aforementioned heating working method can be applied in a cleaning machine, which can be any device that needs to be heated for cleaning, such as a washing machine, a dishwasher, etc. The cleaning machine using this method works more reasonably and intelligently, achieving an intelligent balance between cleaning effect and heating energy consumption.

[0031] Embodiment 2

[0032] like Figure 2 As shown, the difference between this embodiment and the first embodiment is that: the temperature rise coefficient curve Ar=Ae is fitted according to the calculated temperature rise coefficient -Bt ; B is the heat dissipation coefficient that characterizes the speed of heat dissipation. The larger the B is, the faster the heat dissipation speed is during the cleaning process of the cleaning machine, and the lower the absorption conversion rate of the heating power consumption is. Therefore, the B value can be used to determine the timing of stopping heating of the cleaning machine. Calculate the corresponding B according to the real-time Ar value, and compare B with the preset dissipation coefficient threshold B0. If B≥B0, the cleaning machine is controlled to stop heating.

[0033] The temperature rise coefficient curve Ar=Ae -Bt The theoretical basis for the setup is as follows:

[0034] Where Q is the energy dissipation rate and T0 is the initial temperature of the water in the cleaning machine.

[0035] According to formula (1), it can be deduced that:

[0036] Taking ordinary differential derivative of formula (2), we can get:

[0037]

[0038] When t=0, T=T0; then according to formula (4), C=-P / Q can be calculated;

[0039] in this way

[0040] Then get

[0041] Since the heating coefficient A = P / cm and the dissipation coefficient B = Q / cm, according to formula (6):

[0042]

[0043] Derivative of formula (7) yields: Ar = Ae -Bt .

[0044] Embodiment 3

[0045] like Figure 3 As shown, the difference between this embodiment and the first and second embodiments is that after the cleaning machine starts to heat up, in the early stage of heating, the temperature rise coefficient is calculated by the collected temperature data, and the calculated temperature rise coefficient can be used to fit the temperature rise coefficient curve Ar=Ae -Bt ; B is the heat dissipation coefficient that characterizes the heat dissipation rate;

[0046] The preset critical value of heat absorption capacity η0=Ar0 / A, where Ar0 is the critical temperature rise coefficient. Specifically, η0 can be selected within the range of 0.5≤η0<1 as needed. When the heat absorption capacity parameter η reaches η0, that is, the water in the cleaning machine has a very limited ability to absorb the heat for heating, the heating is stopped at this time. In this way, the heating time t0 of the cleaning machine for the current heating and cleaning work can be estimated in the early stage of heating, t0=﹣lnη0 / B. Accordingly, the heating time of the cleaning machine for the current heating and cleaning work is controlled to be t0. When the heating time reaches t0, the cleaning machine is controlled to stop heating, and the cleaning machine continues the cleaning work according to the specific cleaning time.

Claims

1. A heating cleaning method for a cleaning machine, characterized in that: In the process of controlling the cleaning machine to perform heating work, the temperature data T of the water in the cleaning machine is collected in real time, and then the temperature curve is obtained according to the temperature data T, and the real-time temperature rise coefficient Ar is calculated according to the temperature curve, Ar=dT / dt, where t represents time; Control the timing of stopping heating of the cleaning machine according to the temperature rise coefficient Ar; When the cleaning machine needs to perform heating cleaning work, the heating coefficient A of the cleaning machine is calculated, A=P / cm, P is the heating power, c is the specific heat capacity of water, and m is the mass of water; When controlling the cleaning machine to perform heating, the heat absorption capacity parameter η is calculated in real time, η=Ar / A, and η is compared with the preset heat absorption capacity critical value η0. If η≤η0, the cleaning machine is controlled to stop heating.

2. The heating cleaning method of a cleaning machine according to claim 1, characterized in that: 0.5≤η0<1.

3. A heating cleaning method for a cleaning machine, characterized in that: In the process of controlling the cleaning machine to perform heating work, the temperature data T of the water in the cleaning machine is collected in real time, and then the temperature curve is obtained according to the temperature data T, and the real-time temperature rise coefficient Ar is calculated according to the temperature curve, Ar=dT / dt, where t represents time; Control the timing of stopping heating of the cleaning machine according to the temperature rise coefficient Ar; When the cleaning machine needs to perform heating cleaning work, the heating coefficient A of the cleaning machine is calculated, A=P / cm, P is the heating power, c is the specific heat capacity of water, and m is the mass of water; According to the calculated temperature rise coefficient, the temperature rise coefficient curve Ar=Ae is fitted -Bt ; B is the heat dissipation coefficient that characterizes the speed of heat dissipation; B is compared with a preset dissipation coefficient threshold value B0, and if B≥B0, the cleaning machine is controlled to stop heating.

4. A heating cleaning method for a cleaning machine, characterized in that: In the process of controlling the cleaning machine to perform heating work, the temperature data T of the water in the cleaning machine is collected in real time, and then the temperature curve is obtained according to the temperature data T, and the real-time temperature rise coefficient Ar is calculated according to the temperature curve, Ar=dT / dt, where t represents time; Control the timing of stopping heating of the cleaning machine according to the temperature rise coefficient Ar; When the cleaning machine needs to perform heating cleaning work, the heating coefficient A of the cleaning machine is calculated, A=P / cm, P is the heating power, c is the specific heat capacity of water, and m is the mass of water; According to the calculated temperature rise coefficient, the temperature rise coefficient curve Ar=Ae is fitted -Bt ; B is the heat dissipation coefficient that characterizes the heat dissipation rate; The preset critical value of heat absorption capacity η0=Ar0 / A, where Ar0 is the critical temperature rise coefficient, controls the heating time of the cleaning machine during the heating and cleaning work to be t0, t0=-lnη0 / B.

5. The heating cleaning method of a cleaning machine according to claim 4, characterized in that: 0.5≤η0<1.

6. A cleaning machine, characterized in that: A heating cleaning method using a cleaning machine as described in any one of claims 1 to 5.

Images