Heating cleaning method of cleaning machine and cleaning machine

Abstract

The present invention relates to a heating and cleaning method for a cleaning machine. When the cleaning machine performs a heating and washing operation, the chamber temperature Tq and the water inlet temperature Ts of the cleaning chamber of the cleaning machine are obtained before water begins to flow into the cleaning chamber. Based on the different comparison results of Tq and Ts, the activation timing of the heating device is controlled to achieve different target temperature values, thereby ensuring that the water temperature in the cleaning chamber reaches a set target temperature value. This heating and cleaning method for a cleaning machine can effectively utilize the heat in the cleaning chamber without adding a heat exchange structure, thereby reducing heating energy consumption. The present invention also relates to a cleaning machine using this heating and cleaning method for a cleaning machine, comprising a housing having a cleaning chamber, a water inlet pipe connected to the cleaning chamber of the housing, a first temperature sensor disposed on the water inlet pipe for detecting the water inlet temperature, a second temperature sensor disposed within the cleaning chamber to detect the chamber temperature, a heating device disposed within the cleaning chamber, and a control circuit board. This cleaning machine has low energy consumption.

Description

Technical Field

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

[0002] When the cleaning machine is performing cleaning work, in order to improve the cleaning effect, especially when cleaning objects to be cleaned with severe oil pollution, a heating and rinsing workflow is usually set to realize the cleaning work of the objects to be cleaned, thereby improving the cleaning effect. In the prior art, the temperature difference between the inlet water temperature and the target temperature is usually used to calculate the heating parameters of the water by the heating element. For example, the Chinese invention patent application with publication number CN112263200A (application number 202011140849.0) is "Power regulation method, device and system based on inlet water temperature", in which the disclosed method is: obtain the inlet water temperature of the dishwasher, and obtain the temperature difference between the inlet water temperature and the set rinsing temperature; according to the temperature difference, determine the first heating power value required to heat the single inlet water of the dishwasher from the inlet water temperature to the set rinsing temperature within the preset main wash time; according to the first heating power value, determine the second heating power value of the heating module, and determine the working mode of the heating module. This method dynamically calculates the temperature difference between the inlet water temperature and the set rinse temperature, and reversely calculates the required heating power value in combination with the main wash set time; the working gear of the heating module can be adjusted by the determined second power value to achieve the purpose of heating to the set temperature within the specified time.

[0003] However, in actual use, the inlet water temperature is usually lower than the temperature of the cleaning chamber inside the cleaning machine. Once the water enters the cleaning chamber, it will also absorb the heat of the cleaning chamber. However, the existing technology only uses the temperature difference between the inlet water temperature and the target temperature as the basis for calculating the operating parameters of the heating device, without considering the impact of the heat inside the chamber. As a result, the actual water temperature during cleaning will be higher than the target temperature, resulting in energy waste and high energy consumption. 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 without adding a heat exchange structure, thereby effectively utilizing the heat in the cleaning chamber and reducing heating energy consumption.

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

[0006] The technical solution adopted by the present invention to solve the first technical problem is: a heating cleaning method for a washing machine, characterized in that: when the washing machine performs heating washing, the cavity temperature Tq before water starts to flow into the washing chamber of the washing machine is obtained, and the water inlet temperature Ts is obtained;

[0007] According to the different comparison results of Tq and Ts, the different start-up timings of the heating device are controlled, so that the water temperature in the cleaning chamber reaches the set target temperature value.

[0008] As an improvement, in order to better control the working timing of the heating device, Ts and Tq are compared;

[0009] If Ts < Tq - a, where a is the set fluctuating temperature difference and 0 ≤ a < Tq, the heating device is temporarily not turned on to exchange heat between the water and the cleaning chamber, and the working state of the heating device is controlled according to the water temperature after the heat exchange;

[0010] If Ts≥Tq-a, the control immediately turns on the heating device to perform heating work.

[0011] Optionally, for the case where Ts is less than Tq-a, the control first performs cleaning for a set time A with the heating device in the off state, and then detects whether the water temperature in the cleaning chamber reaches the set target temperature; if so, the control keeps the heating device in the off state; if not, the control turns on the heating device until the water in the cleaning chamber is heated to the set target temperature value and then controls the heating device to be turned off.

[0012] Alternatively, A is a fixed value; or

[0013] Calculate the temperature difference ΔT of Ts relative to Tq = Tq - Ts; preset different set time lengths A for different temperature difference intervals; and determine the corresponding set time length A according to ΔT.

[0014] Optionally, for the case where Ts<Tq-a, the control first performs cleaning work with the heating device in the off state, and detects and obtains the water temperature in the cleaning chamber in real time. If the water temperature in the cleaning chamber is stable, it is determined whether the stable water temperature in the cleaning chamber reaches the set target temperature; if so, the heating device is controlled to remain in the off state; if not, the heating device is controlled to be turned on until the water in the cleaning chamber is heated to the set target temperature value and then the heating device is controlled to be turned off.

[0015] Preferably, the method for judging whether the water temperature in the cleaning chamber is stable is that within the set time length B, the maximum temperature change is less than a set temperature difference threshold.

[0016] In order to minimize the heat dissipation loss in the cavity, and at the same time control the heating time of the heating device as accurately as possible to reduce energy consumption, for the case of Ts≥Tq-a, the water temperature in the cleaning cavity is detected in real time during the operation of the heating device. When the water temperature in the cleaning cavity reaches the set target temperature value, the heating device is controlled to stop heating.

[0017] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a cleaning machine, including a box body with a cleaning chamber, a water inlet pipe connected to the cleaning chamber of the box body, a first temperature sensor arranged on the water inlet pipe for detecting the inlet water temperature, a second temperature sensor arranged in the cleaning chamber, a heating device arranged in the cleaning chamber, and a control circuit board electrically connected to the first temperature sensor, the second temperature sensor, and the heating device respectively, characterized in that: the above-mentioned heating cleaning method of the cleaning machine is applied.

[0018] Compared to the prior art, the present invention offers the following advantages: During a heated washing operation, the heating and cleaning method of a washing machine according to the present invention does not directly compare the inlet water temperature with a set target temperature to control the heating operation of the heating device. Instead, it compares the inlet water temperature with the temperature of the washing chamber. This comparison result allows the determination of whether there is excess available chamber heat, and thus determines the activation timing of the heating device. Specifically, when available chamber heat is available, it can be fully utilized, thereby reducing the heating device's energy consumption by controlling the activation timing of the heating device, and even eliminating the need for heating. Furthermore, when there is no excess chamber heat available, further dissipation of the existing chamber heat can be prevented by controlling the activation timing of the heating device, thereby reducing energy consumption. Furthermore, this heating and cleaning method for a washing machine can ensure that the water temperature in the washing chamber reaches the target temperature more accurately, resulting in a high degree of consistency in the washing machine's heating and washing conditions. This also ensures consistent operating conditions during the drying operation, resulting in a simpler and more consistent control strategy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Flowchart of the heating cleaning method of the cleaning machine in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0021] The heated cleaning method for a cleaning machine of this embodiment can be applied to various cleaning appliances that require heated washing, such as dishwashers. A cleaning machine employing the heated cleaning method for a cleaning machine of this embodiment includes a housing having a cleaning chamber, a water inlet pipe communicating with the cleaning chamber of the housing, a first temperature sensor disposed on the water inlet pipe for detecting the temperature of the inlet water, a second temperature sensor disposed within the cleaning chamber to detect the temperature of the inlet water, a heating device disposed within the cleaning chamber, and a control circuit board electrically connected to the first temperature sensor, the second temperature sensor, and the heating device.

[0022] The first temperature sensor detects the temperature of the water entering the cleaning chamber from the water inlet pipe, and the second temperature sensor detects the temperature of the cleaning chamber when no water is entering the cleaning chamber, and can detect the water temperature in the cleaning chamber after water is entering the cleaning chamber. Of course, the second temperature sensor for detecting the temperature of the cleaning chamber when no water is entering the cleaning chamber and the second temperature sensor for detecting the temperature of the cleaning chamber after water is entering the cleaning chamber can be different temperature sensors and be installed in different positions.

[0023] The heating device can be a heating component in a cleaning machine in the prior art. The shape and location of the heating device can be different for different types of cleaning machines.

[0024] like Figure 1 As shown, the heating and cleaning method of the washing machine in this embodiment is as follows: when the washing machine is performing heating and washing, the chamber temperature Tq of the washing machine before water begins to flow into the washing chamber is obtained, and then the water flow is controlled to obtain the water inlet temperature Ts. Based on the different comparison results of Tq and Ts, the activation timing of the heating device is controlled to ensure that the water temperature in the washing chamber reaches the set target temperature value.

[0025] Specifically, Ts and Tq are compared; if Ts < Tq - a, where a is the set fluctuating temperature difference, and 0 ≤ a < Tq, the heating device is controlled to be temporarily not turned on to exchange heat between the water and the cleaning chamber, and the working state of the heating device is controlled according to the water temperature after the heat exchange. When the heating device is not turned on temporarily, the water entering the cleaning chamber can first absorb the heat generated by the part of the chamber temperature that is higher than the water inlet temperature. After the water temperature rises, the difference between the water temperature in the cleaning chamber and the target temperature is reduced, and then the heating device is controlled to heat, and the heating power consumption is low without even turning on the heating device. If Ts ≥ Tq - a, the heating device is controlled to be turned on immediately for heating. In this way, when the chamber still has a certain amount of heat, the heat dissipation of the chamber can be avoided as much as possible, and the heating energy consumption of the heating device can be reduced as much as possible.

[0026] The value of a is set based on specific needs and is a relatively small temperature value, such as 0°C or 3°C. If a is set to a value greater than 0, it is considered that if Ts is close to Tq, the heat generated by the portion of the cavity that is higher than the inlet water temperature is small, and the effect of raising the water temperature is limited. In this case, the heating device can be directly controlled to heat the water in the cleaning cavity.

[0027] For the case where Ts<Tq-a, the start timing of the heating device can be controlled in two ways.

[0028] Method 1: For the case where Ts < Tq - a, the system first performs a cleaning operation for a set duration A with the heating device off. During this time, the water entering the cleaning chamber absorbs heat from the chamber while cleaning, causing the water temperature to rise continuously. The system then checks whether the water temperature in the cleaning chamber has reached the set target temperature. If so, the heating device remains off. If not, the heating device is turned on until the water in the cleaning chamber reaches the set target temperature, at which point the heating device is turned off.

[0029] A can be a fixed value, such as 10 minutes. When A is a fixed value, it is preferably the time required for the water entering the cleaning chamber to complete heat exchange with the cleaning chamber under the maximum temperature difference. This maximum temperature difference is the maximum possible temperature difference between the inlet water temperature and the cleaning chamber temperature, determined during the testing phase of the cleaning machine development. Typically, depending on the area where the cleaning machine is used, the corresponding maximum temperature difference will also vary, and the fixed set time A will also vary.

[0030] Alternatively, during operation, the temperature difference between Ts and Tq is calculated as ΔT = Tq - Ts. The control module on the control circuit board stores different set time lengths A for different temperature difference intervals; the corresponding set time length A is determined based on ΔT. Generally, the larger the temperature difference ΔT, the longer the corresponding set time length A.

[0031] Method 2: For the case where Ts < Tq - a, the control first performs the cleaning operation with the heating device in the off state. During this process, the water entering the cleaning chamber absorbs heat from the chamber while cleaning, causing the water temperature to continuously rise. The water temperature in the cleaning chamber is detected in real time. If the water temperature in the cleaning chamber stabilizes, the control determines whether the stable water temperature in the cleaning chamber has reached the set target temperature. If so, the control keeps the heating device in the off state. If not, the control turns on the heating device until the water in the cleaning chamber is heated to the set target temperature, after which the control turns off the heating device.

[0032] The water temperature in the cleaning chamber is stable if it is within a set time period, B. For example, B can be set to 30 seconds. If the maximum temperature change within 30 seconds is less than the set temperature difference threshold, the maximum temperature change is calculated by subtracting the minimum temperature from the highest temperature within the set time period. The temperature difference threshold can be set to 0.5°C, for example.

[0033] When Ts is less than Tq-a, the water entering the cleaning chamber can fully absorb the heat attached to the cavity to increase the water temperature. By temporarily not turning on the heating device, the power consumption of the heating device can be reduced, and it may even be unnecessary to turn on the heating device, which greatly reduces the heating energy consumption during heating cleaning.

[0034] If Ts ≥ Tq - a, the control immediately activates the heating device to start heating. During the operation of the heating device, the water temperature in the cleaning chamber is monitored in real time. When the water temperature in the cleaning chamber reaches the set target temperature, the heating device is controlled to stop heating. This process quickly activates the heating device to minimize heat dissipation in the cleaning chamber. Real-time monitoring of the water temperature in the cleaning chamber allows for the most accurate control of the heating device's heating time, ultimately achieving the goal of reducing energy consumption.

[0035] For example, in the summer, when the room temperature is 35°C and the temperature of the washing chamber is close to 35°C when the dishwasher is not in operation, if the inlet water temperature is 25°C, the first heating cycle needs to be heated to 60°C, and the second heating cycle needs to be heated to 40°C. Without considering heat dissipation, using the heating and cleaning method of the washing machine in this embodiment, during the first heating cycle, the water enters the chamber and absorbs heat, bringing the water temperature to approximately 30°C. Therefore, the heating device only needs to heat the water from 30°C to 60°C. During the second heating cycle, after draining, the chamber temperature is close to 60°C. The 25°C water enters the chamber and absorbs the heat, bringing it to approximately 40°C. Therefore, the second heating cycle does not require further heating by the heating device, significantly reducing washing energy consumption. In actual use, year-round, since the water source is typically outdoors and the washing machine is installed indoors, the inlet water temperature is typically lower than the chamber temperature. This method effectively reduces the energy consumption of the washing machine during long-term operation.

[0036] The heating and cleaning method of a washing machine according to the present invention, during a heating and cleaning operation, does not directly compare the inlet water temperature with a set target temperature to control the heating operation of the heating device. Instead, it compares the inlet water temperature with the temperature of the washing chamber. This comparison result allows the determination of whether there is excess available chamber heat, and thus determines the timing of delaying or immediately activating the heating device. Specifically, when available chamber heat is available, it can be fully utilized, thereby reducing the heating device's energy consumption by controlling the heating device's activation timing, or even eliminating the need for heating. Furthermore, when there is no excess chamber heat available, further dissipation of the existing chamber heat can be prevented by controlling the heating device's activation timing, thereby reducing energy consumption. Furthermore, this heating and cleaning method for a washing machine can ensure that the water temperature in the washing chamber reaches the target temperature more accurately, resulting in a high degree of consistency in the washing machine's heating and cleaning operation. This also ensures consistent operation during the drying operation, resulting in a simpler and more consistent control strategy.

Claims

1. A heating cleaning method for a cleaning machine, characterized in that: When the washing machine performs heating and washing, the cavity temperature Tq before water starts to flow into the washing chamber of the washing machine is obtained, and the water inlet temperature Ts is obtained; According to the different comparison results of Tq and Ts, the different start-up timings of the heating device are controlled, so that the water temperature in the cleaning chamber reaches the set target temperature value; Compare Ts and Tq; If Ts < Tq - a, where a is the set fluctuating temperature difference and 0 ≤ a < Tq, the heating device is temporarily not turned on to exchange heat between the water and the cleaning chamber, and the working state of the heating device is controlled according to the water temperature after the heat exchange; If Ts≥Tq-a, the control immediately turns on the heating device to perform heating work.

2. The heating cleaning method of a cleaning machine according to claim 1, characterized in that: For the case where Ts is less than Tq-a, the control first performs the cleaning work for the set time A with the heating device in the off state, and then detects whether the water temperature in the cleaning chamber reaches the set target temperature; if so, the control keeps the heating device in the off state; if not, the control turns on the heating device and turns off the heating device after heating the water in the cleaning chamber to the set target temperature value.

3. The heating cleaning method of a cleaning machine according to claim 2, characterized in that: A is a fixed value; or Calculate the temperature difference ΔT = Tq - Ts between Ts and Tq; preset different set time lengths A for different temperature difference intervals; and determine the corresponding set time length A based on ΔT.

4. The heating cleaning method of a cleaning machine according to claim 1, characterized in that: For the case where Ts is less than Tq-a, the control first performs cleaning work with the heating device in the off state, and obtains the water temperature in the cleaning chamber in real time. If the water temperature in the cleaning chamber is stable, it is determined whether the stable water temperature in the cleaning chamber reaches the set target temperature; If yes, the heating device is controlled to remain in an off state; if not, the heating device is controlled to be turned on and to work until the water in the cleaning chamber is heated to a set target temperature value and then the heating device is controlled to be turned off.

5. The heating cleaning method of a cleaning machine according to claim 4, characterized in that: The method for judging whether the water temperature in the cleaning chamber is stable is that within the set time length B, the maximum temperature change is less than the set temperature difference threshold.

6. The heating cleaning method of a cleaning machine according to any one of claims 1 to 5, characterized in that: For the case of Ts≥Tq-a, during the operation of the heating device, the water temperature in the cleaning chamber is detected in real time. When the water temperature in the cleaning chamber reaches the set target temperature value, the heating device is controlled to stop heating.

7. A cleaning machine comprising a housing having a cleaning chamber, a water inlet pipe communicating with the cleaning chamber of the housing, a first temperature sensor disposed on the water inlet pipe for detecting the temperature of the inlet water, a second temperature sensor disposed within the cleaning chamber to detect the temperature of the inlet water, a heating device disposed within the cleaning chamber, and a control circuit board electrically connected to the first temperature sensor, the second temperature sensor, and the heating device, wherein: A heating cleaning method using the cleaning machine according to any one of claims 1 to 6.

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