CN111466849A - Control method and control device for preventing sudden change of gas volume in inner cavity of dish-washing machine - Google Patents
Control method and control device for preventing sudden change of gas volume in inner cavity of dish-washing machine Download PDFInfo
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
- A47L15/0028—Washing phases
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
- A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
- A47L15/22—Rotary spraying devices
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
- A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
- A47L15/4223—Devices for water discharge, e.g. devices to prevent siphoning, non-return valves
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4251—Details of the casing
- A47L15/4274—Arrangement of electrical components, e.g. control units or cables
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4285—Water-heater arrangements
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4287—Temperature measuring or regulating arrangements
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/46—Devices for the automatic control of the different phases of cleaning ; Controlling devices
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/12—Water temperature
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/18—Air temperature
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/26—Loading door status, e.g. door latch opened or closed state
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/02—Water discharge, e.g. opening or closure of discharge valve
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/06—Water heaters
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/10—Air circulation, e.g. air intake or venting arrangements
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/20—Spray nozzles or spray arms
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2601/00—Washing methods characterised by the use of a particular treatment
- A47L2601/02—Pressurised cleaning liquid delivered by a pump
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Abstract
The invention discloses a control method and a control device for preventing sudden change of gas volume in an inner cavity of a dish-washing machine, wherein the method comprises the following steps: s1, detecting an event: collecting a cover opening signal, a water inlet signal and a water discharge signal of the dish washing machine and water temperature and air temperature data in an inner cavity, respectively judging whether thermal expansion/cold contraction occurs according to the cover opening signal, the water inlet signal and the water discharge signal, if the thermal expansion/cold contraction does not occur, finishing, and if the thermal expansion/cold contraction occurs, continuing; s2, determination condition: judging whether hot expansion or cold shrinkage occurs; s3, determination condition: judging the type of the motor adopted by the dish washing machine, wherein the judgment result is the adjustable speed motor or the non-adjustable speed motor; s4, executing tasks: an execution scenario is selected according to the judgment results of steps S2-S3. The invention effectively prevents the loss of the dish-washing machine components caused by the expansion with heat and the contraction with cold of the inner cavity of the dish-washing machine and solves the problem of scalding when the cover is opened.
Description
Technical Field
The invention relates to the technical field of dish washing machines, in particular to a control method and a control device for preventing sudden change of gas volume in an inner cavity of a dish washing machine.
Background
The dish washer is used to automatically clean tableware such as dish, chopsticks, dish, knife and fork. The full-automatic dish-washing machine on the market can be divided into two types of household and commercial, the full-automatic dish-washing machine for household is only suitable for families, and mainly comprises a cabinet type, a desk type, a water tank integrated type and an integrated type, and the commercial dish-washing machine can be divided into a cabinet type, a cover type, a basket transmission type, a belt transmission type and 5 types of ultrasonic waves according to the structure, so that the labor intensity of cooking personnel in dining rooms, hotels and dining halls of institutions is reduced, the working efficiency is improved, and the cleanness and the sanitation are improved.
The common non-ultrasonic dish washing machine comprises an inner cavity, a water inlet module, a heating module, a spraying module, a drainage module and other structures, wherein tableware is placed in the inner cavity, the water inlet is divided into hot water and cold water, the hot water is obtained by heating the heating module, and the water inlet and the water outlet are respectively completed by a water inlet pump and a water discharge pump driven by a motor; the unavoidable production difference in temperature of its inner chamber of current dish washer in the washing stage leads to the gaseous volume of inner chamber to change suddenly, and the reason is as follows:
when spraying the washing, water is heated, and the temperature is higher and produce a large amount of steam in the inner chamber, uncaps midway because of some reasons (if add the tableware) this moment, opens the upper cover promptly, and air runs out from the upper cover mouth in the inner chamber, and air conditioning gets into the inner chamber, closes the upper cover back if directly spray the cold air on hot water can heat the upper strata, makes gaseous rapid inflation, and the upper cover is probably opened on the top to the increase of cavity atmospheric pressure, leads to the procedure of washing the dishes to suspend, and the hot water spill scalds user's serious injury even.
When the hot water spraying is finished and the water is changed, cold water is fed, if the water is directly sprayed, the gas on the upper part of the inner cavity is quenched, the gas volume of the inner cavity is shrunk, and the four walls of the inner cavity are subjected to certain atmospheric pressure, so that the bottom plate of the upper cover plate is collapsed and the inner cavity is deformed.
In view of the above, the present inventors have made extensive studies on the expansion and contraction problem of a dishwasher, and have proposed a control method and a control device capable of preventing a sudden change in the volume of an inner chamber.
Disclosure of Invention
The invention aims to solve the technical problems and provides a control method and a control device for preventing sudden change of gas volume in an inner cavity of a dish washing machine, so that the loss of parts of the dish washing machine caused by thermal expansion and cold contraction of the inner cavity of the dish washing machine is prevented, and the problem of scalding during uncovering is solved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a control method for preventing sudden change of gas volume in an inner cavity of a dish washing machine comprises the following steps:
s1, detecting an event: collecting a cover opening signal, a water inlet signal and a water discharge signal of the dish washing machine and water temperature and air temperature data in an inner cavity, respectively judging whether thermal expansion/cold contraction occurs according to the cover opening signal, the water inlet signal and the water discharge signal, if the thermal expansion/cold contraction does not occur, finishing, and if the thermal expansion/cold contraction occurs, continuing;
s2, determination condition: judging whether hot expansion or cold shrinkage occurs;
s3, determination condition: judging the type of the motor adopted by the dish washing machine, wherein the judgment result is the adjustable speed motor or the non-adjustable speed motor;
s4, executing tasks: selecting one or more of the following execution schemes according to the judgment results of the steps S2-S3:
A. if the thermal expansion type is judged, the speed of the motor can be adjusted, and the motor is controlled to spray at a low speed for a certain time;
B. if the thermal expansion type is judged, controlling the motor to wait for a certain time if the speed-adjustable motor or the speed-unmodulatable motor is judged;
C. if the thermal expansion type is judged, controlling the motor to intermittently spray if the speed-adjustable motor or the speed-unmodulatable motor is judged;
D. if the thermal expansion type is judged, the speed-adjustable motor or the speed-unmodulatable motor is used, hot water in the inner cavity is drained, and cold water is fed;
E. if the model is judged to be cold shrinkage type, the speed of the motor can be adjusted, and the motor is controlled to spray at low speed for a certain time;
F. if the water is judged to be in a cold shrinkage type, spraying while feeding water, controlling the water feeding amount to be less than or equal to V1, controlling the height of a spraying water column to be less than or equal to H, and spraying for a certain time until the water amount required by cleaning is finished;
G. if the cooling-shrinkage type motor is a speed-adjustable motor or a non-speed-adjustable motor, hot air in the inner cavity is discharged and cold air enters the inner cavity.
Further, in step S1, respectively determining whether thermal expansion/cold contraction occurs according to the lid opening signal and the water inlet/outlet signal includes:
if the cover opening signal exists, judging that thermal expansion occurs;
and if the signals of the hot water discharging and the cold water feeding are judged to be cold-shrinkage.
Further, before step S4, the method further includes the step of determining a condition: the magnitude of the temperature difference between the water temperature and the air temperature is determined, and when step S4 is executed, an execution plan is selected and an execution time is determined according to the magnitude of the temperature difference.
Further, in step S1, the time length information for opening the cover and the water temperature data for closing the cover are collected, and before step S4, the thermal expansion/cold contraction strength is determined according to the time length information for opening the cover, the water temperature data for closing the cover, and the water temperature difference.
A control device for preventing sudden change of gas volume in an inner cavity of a dish washing machine comprises a control module, and a door control induction module, a temperature induction module, a spraying module, a heating module, a water inlet module, a water drainage module and an air inlet and exhaust module which are respectively connected with the control module; the door control sensing module is used for collecting a cover opening/closing signal of the dish washing machine and sending the signal to the control module, the temperature sensing module is used for collecting inner cavity temperature data and water temperature data and sending the data to the control module, and the control module is used for controlling the opening and closing of the spraying module, the heating module, the water inlet module, the water drainage module and the air inlet and exhaust module and the operation power according to the cover opening/closing signal, the temperature and the water temperature data.
After the technical scheme is adopted, compared with the prior art, the invention has the beneficial effects that: the invention firstly collects the signals of a cover opening signal, hot water inlet and cold water inlet, judges whether thermal expansion/cold contraction occurs according to the signals, respectively proposes an execution scheme aiming at the types of the thermal expansion and the cold contraction under the driving modes of a speed-adjustable motor and a non-speed-adjustable motor, leads the slow speed of the water vapor to be consistent by reducing the spraying speed for the speed-adjustable motor, prevents the situation of the sudden change of the gas volume, respectively controls the situations of the thermal expansion and the cold contraction for the non-speed-adjustable motor, wherein the cold contraction enables the temperature of the upper layer gas in the inner cavity to be slowly consistent with the water temperature by controlling the water inflow so as to limit the spraying height, can also adopt the mode of exhausting hot gas and feeding cold gas to prevent the damage of the dishwasher caused by the sudden reduction of the air pressure in the inner cavity, and adopts four measures to reduce the influence of the thermal expansion under different, finally, the gas volume is not suddenly changed, and the speed-adjustable motor can also adopt all execution schemes of a speed-adjustable motor, so that the problems of expansion with heat and contraction with cold caused by various reasons in the inner cavity of the dish-washing machine are solved, the problems of hot air rushing to the cover, hot water sputtering, upper cover adsorption and the like are avoided, the damage of the sudden change of the air pressure of the cavity to the dish-washing machine is prevented, the service life of the dish-washing machine is prolonged, and the user experience is improved.
Drawings
FIG. 1 is a structural diagram of a control device for preventing sudden change of gas volume in an inner cavity of a dishwasher according to the present invention.
Description of the reference symbols
The system comprises a control module 1, a door control induction module 2, a temperature induction module 3, a spraying module 4, a heating module 5, a water inlet module 6, a drainage module 7 and an air inlet and exhaust module 8
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more clear and obvious, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to the following table 1, the present invention discloses a control method and a control device for preventing sudden change of gas volume in an inner cavity of a dishwasher, which comprises the following steps:
s1, detecting an event: collecting a cover opening signal, a water inlet signal and a water discharge signal of the dish washing machine and water temperature and air temperature data in an inner cavity, respectively judging whether thermal expansion/cold contraction occurs according to the cover opening signal, the water inlet signal and the water discharge signal, if the thermal expansion/cold contraction does not occur, finishing, and if the thermal expansion/cold contraction occurs, continuing; the judging process specifically comprises the following steps: 1. if the cover opening signal exists, judging that thermal expansion occurs; 2. and if the signals of the hot water discharging and the cold water feeding are judged to be cold-shrinkage. In the step, the uncovering time length information and the water temperature data of the closed cover can be collected, and the thermal expansion strength can be judged according to the uncovering time length information, the water temperature data of the closed cover and the water temperature difference. When the thermal expansion degree is judged, the judgment can be carried out according to the uncovering time and the water temperature parameter when the cover is closed, the longer the uncovering time is, the more cold air enters the inner cavity, the higher the thermal expansion degree is, the higher the water temperature is when the cover is closed, the larger the temperature difference between the water temperature and the external air temperature is, and the more serious the thermal expansion condition is.
S2, determination condition: judging whether hot expansion or cold shrinkage occurs; this adjustment may be made in accordance with the determination result of step S1;
s3, determination condition: judging the type of the motor adopted by the dish washing machine, wherein the judgment result is the adjustable speed motor or the non-adjustable speed motor;
s4, executing tasks: selecting one or more of the following execution schemes according to the judgment results of the steps S2-S3:
A. if the thermal expansion type is judged, the speed of the motor can be adjusted, and the motor is controlled to spray at a low speed for a certain time;
B. if the thermal expansion type is judged, controlling the motor to wait for a certain time if the speed-adjustable motor or the speed-unmodulatable motor is judged;
C. if the thermal expansion type is judged, controlling the motor to intermittently spray if the speed-adjustable motor or the speed-unmodulatable motor is judged;
D. if the thermal expansion type is judged, the speed-adjustable motor or the speed-unmodulatable motor is used, hot water in the inner cavity is drained, and cold water is fed;
E. if the model is judged to be cold shrinkage type, the speed of the motor can be adjusted, and the motor is controlled to spray at low speed for a certain time;
F. if the water is judged to be in a cold shrinkage type, spraying while feeding water, controlling the water feeding amount to be less than or equal to V1, controlling the height of a spraying water column to be less than or equal to H, and spraying for a certain time until the water amount required by cleaning is finished;
G. if the cooling-shrinkage type motor is a speed-adjustable motor or a non-speed-adjustable motor, hot air in the inner cavity is discharged and cold air enters the inner cavity.
Table 1: execution scheme look-up table
Referring to the table 1 above, the specific operation of the implementation scheme a or E is to control the motor speed (power) to control the low-speed spraying time T1 (for example, 20S) of the spraying module, so that the spraying height of the water column is not higher than the set threshold H, and since the speed-adjustable motor can adjust the operation speed of the motor, the spraying speed can be controlled by controlling the speed of the motor, and the problems of thermal expansion and cold contraction can be solved simultaneously under the condition of low-speed spraying; when in cold contraction, the upper wheel cleaning procedure is completed, hot water and cold water are discharged, so that the cold contraction is generated, and the water column height is limited by adopting low-speed spraying, so that the temperature of water vapor can be mildly consistent; the low speed means that the height of water sprayed by the spray arm cannot reach the upper cover and the four walls so as to avoid splashing of the water column, the temperature does not change suddenly and gradually tends to the water temperature, the low speed is realized by controlling the running power of the motor/water pump, for example, the running power is controlled to be 30% of the power for normal operation of the water pump, and the actual running power is based on the condition that the splashing does not occur at the height of the spray water column.
Referring to table 1 above, executing scheme B is the simplest operation, and therefore is not described in detail.
Referring to table 1 above, the implementation scheme C is to perform short showering, and energize the motor for a short time to control the height of the water column to be below H without sputtering.
Referring to the above table 1, the scheme D is implemented, that is, hot water and cold water are drained, the expansion problem is converted into the contraction problem, and then the contraction problem can be solved completely by adopting the contraction problem, for example, the scheme E or F is implemented.
Referring to the above table 1, in the implementation of the scheme F, when the water inflow is controlled to reach V1 (for example, 560ml) by a method of spraying while water inflow, water inflow is stopped, spraying is continued for T1 time (for example, 30s), and then spraying while water inflow is performed until the water amount required for cleaning is reached (for example, 2.5L), the control of the water inflow is critical, the spraying height is limited when the water inflow is not higher than V1, gas cold contraction caused by quenching of gas in the upper part of the inner cavity is avoided, the atmospheric pressure on the four walls of the inner cavity is reduced, and the problem of the bottom plate collapse of the upper cover is solved;
referring to the above table 1, the scheme G is implemented, i.e. heat and air are exhausted and cool air is introduced, so that the high-temperature air in the inner cavity is not shrunk any more, and the damage to the four walls of the inner cavity and the bottom plate of the upper cover due to cold shrinkage is prevented.
Preferably, step S4 is preceded by the step of determining a condition: and judging the temperature difference between the water temperature and the air temperature, and when the step S4 is executed, selecting an execution scheme and determining the execution time according to the temperature difference, wherein if the cover opening time is long and the temperature difference is large, the waiting time or the spraying time is prolonged.
Preferably, in step S1, the time length for opening the cover and the water temperature data for closing the cover are collected, and before step S4, the thermal expansion strength is determined according to the time length for opening the cover, the water temperature data for closing the cover and the water-air temperature difference.
As shown in figure 1, the invention also discloses a control device for preventing sudden change of gas volume in the inner cavity of the dish-washing machine, which comprises a control module 1, and a gate control induction module 2, a temperature induction module 3, a spraying module 4, a heating module 5, a water inlet module 6, a water drainage module 7 and an air inlet and exhaust module 8 which are respectively connected with the control module 1; the door control sensing module 2 is used for collecting a cover opening/closing signal of the dish washing machine and sending the signal to the control module 1, the temperature sensing module 3 is used for collecting inner cavity air temperature data and water temperature data and sending the data to the control module, and the control module is used for controlling opening, closing and running power of the spraying module 4, the heating module 5, the water inlet module 6, the water discharging module 7 and the air inlet and exhaust module 8 according to the cover opening/closing signal, the air temperature data and the water temperature data and controlling opening, closing and running power of the speed-adjustable motor/the non-adjustable motor in the spraying module 4. The spraying module 4 generally comprises a motor, a water pump, a spraying pipe, a nozzle and other components, the water inlet module 6 and the water discharge module 7 are respectively provided with a water inlet channel and a water outlet channel, the heating module 5 adopts a heating pipe, the control module 1 adopts a control mainboard of the existing dish washing machine, the temperature sensing module 3 adopts a temperature sensor to execute the task, and the gate control sensing module 2 can adopt various switch signal sensors. The intake and exhaust module 8 can be satisfied by using a low-cost exhaust fan.
The control device for preventing sudden change of the gas volume in the inner cavity of the dish-washing machine has the following working process:
firstly, a door opening signal of the dish washing machine is collected by a door control sensing module 2 and sent to a control module 1, the control module 1 can directly obtain water inlet and water outlet signals because the control module 1 controls a water inlet module 6 and a water outlet module 7 to work, a temperature sensing module 3 collects water temperature and temperature data in an inner cavity and sends the water temperature and temperature data to the control module 1, the control module 1 judges whether thermal expansion/cold contraction occurs or not according to the door opening signal and the water inlet and water outlet signals, and the thermal expansion/cold contraction intensity is judged according to the water temperature difference;
secondly, the control module 1 judges whether the hot expansion or the cold shrinkage occurs; the condition can be obtained according to the judgment result of the first step;
thirdly, the control module 1 judges the type of the motor adopted by the dish washing machine, and the judgment result is the speed-adjustable motor or the non-adjustable motor;
fourthly, the control module 1 executes one or more of the schemes A to G according to the judgment results of the second step and the third step:
if the scheme a or E is executed, the specific operation is that the control module 1 sends a control command to the spray module 4, and controls the motor speed (power) thereof to control the time of the low-speed spray T1 (for example, 20S) of the spray module 4, so that the spraying height of the water column is not higher than the set threshold H.
If the scheme B is executed, the control module 1 controls other modules to stand by.
If the scheme C is executed, the control module 1 sends a control command to the spraying module 4 to spray briefly, the motor is electrified for a short time, the spraying height of the water column is controlled below H, and sputtering is avoided.
If the scheme D is executed, the control module 1 sends a control instruction to the water discharging module 7 and the water inlet module 6 to discharge hot water and inlet cold water, the problem of thermal expansion is converted into the problem of cold contraction, and the problem of thermal expansion and cold contraction can be completely solved by adopting a cold contraction mode subsequently, for example, the scheme E or the scheme F is executed.
If the scheme F is executed, the control module 1 sends a control command to the spray module 4 and the water inlet module 6 to operate, and when the water inlet amount reaches V1 (for example, 560ml) by a method of spraying while water inlet, the water inlet module 6 stops water inlet, continues to spray for T1 time (for example, 30s), and then sprays while water inlet until the amount of water required for cleaning is finished (for example, 2.5L).
If the scheme G is executed, the control module 1 sends a control instruction to the air inlet and outlet module 8 to perform the operation of exhausting air and cold air so that the high-temperature air in the inner cavity is not cooled, and the damage to the four walls of the inner cavity and the bottom plate of the upper cover in cold contraction is prevented.
The control device for preventing sudden change of the gas volume in the inner cavity of the dish washing machine can prevent the dish washing machine parts from being lost due to expansion caused by heat and contraction caused by cold of the inner cavity of the dish washing machine through the working process, and solves the problem of scalding when the cover is opened.
While the above description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A control method for preventing sudden change of gas volume in an inner cavity of a dish washing machine is characterized by comprising the following steps:
s1, detecting an event: collecting a cover opening signal, a water inlet signal and a water discharge signal of the dish washing machine and water temperature and air temperature data in an inner cavity, respectively judging whether thermal expansion/cold contraction occurs according to the cover opening signal, the water inlet signal and the water discharge signal, if the thermal expansion/cold contraction does not occur, finishing, and if the thermal expansion/cold contraction occurs, continuing;
s2, determination condition: judging whether hot expansion or cold shrinkage occurs;
s3, determination condition: judging the type of the motor adopted by the dish washing machine, wherein the judgment result is the adjustable speed motor or the non-adjustable speed motor;
s4, executing tasks: selecting one or more of the following execution schemes according to the judgment results of the steps S2-S3:
A. if the thermal expansion type is judged, the speed of the motor can be adjusted, and the motor is controlled to spray at a low speed for a certain time;
B. if the thermal expansion type is judged, controlling the motor to wait for a certain time if the speed-adjustable motor or the speed-unmodulatable motor is judged;
C. if the thermal expansion type is judged, controlling the motor to intermittently spray if the speed-adjustable motor or the speed-unmodulatable motor is judged;
D. if the thermal expansion type is judged, the speed-adjustable motor or the speed-unmodulatable motor is used, hot water in the inner cavity is drained, and cold water is fed;
E. if the model is judged to be cold shrinkage type, the speed of the motor can be adjusted, and the motor is controlled to spray at low speed for a certain time;
F. if the water is judged to be in a cold shrinkage type, spraying while feeding water, controlling the water feeding amount to be less than or equal to V1, controlling the height of a spraying water column to be less than or equal to H, and spraying for a certain time until the water amount required by cleaning is finished;
G. if the cooling-shrinkage type motor is a speed-adjustable motor or a non-speed-adjustable motor, hot air in the inner cavity is discharged and cold air enters the inner cavity.
2. A control method for preventing sudden changes in the volume of gas in the interior space of a dishwasher according to claim 1, characterized in that: in step S1, it is determined whether thermal expansion/cold contraction occurs according to the lid opening signal and the water inlet/outlet signal, respectively, and the determining step includes:
if the cover opening signal exists, judging that thermal expansion occurs;
and if the signals of the hot water discharging and the cold water feeding are judged to be cold-shrinkage.
3. A control method for preventing sudden changes in the volume of gas in the interior space of a dishwasher according to claim 1, characterized in that: step 4 is preceded by the step of determining conditions: the magnitude of the temperature difference between the water temperature and the air temperature is determined, and when step S4 is executed, an execution plan is selected and an execution time is determined according to the magnitude of the temperature difference.
4. A control method for preventing sudden changes in the volume of gas in the interior space of a dishwasher according to claim 3, characterized in that: in the step S1, the time length information of opening the cover and the water temperature data of closing the cover are collected, and before the step S4, the thermal expansion/cold contraction strength is determined according to the time length information of opening the cover, the water temperature data of closing the cover and the water air temperature difference.
5. A control device for preventing sudden change of gas volume in an inner cavity of a dish washing machine is characterized in that: the system comprises a control module, and a door control induction module, a temperature induction module, a spraying module, a heating module, a water inlet module, a water drainage module and an air inlet and exhaust module which are respectively connected with the control module; the door control sensing module is used for collecting a cover opening/closing signal of the dish washing machine and sending the signal to the control module, the temperature sensing module is used for collecting inner cavity temperature data and water temperature data and sending the data to the control module, and the control module is used for controlling the opening and closing of the spraying module, the heating module, the water inlet module, the water drainage module and the air inlet and exhaust module and the operation power according to the cover opening/closing signal, the temperature and the water temperature data.
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| CN202010426733.7A CN111466849A (en) | 2020-05-19 | 2020-05-19 | Control method and control device for preventing sudden change of gas volume in inner cavity of dish-washing machine |
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| CN202010426733.7A CN111466849A (en) | 2020-05-19 | 2020-05-19 | Control method and control device for preventing sudden change of gas volume in inner cavity of dish-washing machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113133732A (en) * | 2021-05-13 | 2021-07-20 | 珠海格力电器股份有限公司 | Control method and device of dish washing machine, dish washing machine and readable storage medium |
| CN113892890A (en) * | 2021-10-15 | 2022-01-07 | 珠海格力电器股份有限公司 | Dish washing machine, control method and device thereof and storage medium |
| CN114224257A (en) * | 2021-11-25 | 2022-03-25 | 珠海格力电器股份有限公司 | Control method and device of dish washing machine |
| WO2022073475A1 (en) * | 2020-10-07 | 2022-04-14 | 青岛海尔洗碗机有限公司 | Dishwasher and method for evaluating pressure thereof |
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2020
- 2020-05-19 CN CN202010426733.7A patent/CN111466849A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022073475A1 (en) * | 2020-10-07 | 2022-04-14 | 青岛海尔洗碗机有限公司 | Dishwasher and method for evaluating pressure thereof |
| CN113133732A (en) * | 2021-05-13 | 2021-07-20 | 珠海格力电器股份有限公司 | Control method and device of dish washing machine, dish washing machine and readable storage medium |
| CN113892890A (en) * | 2021-10-15 | 2022-01-07 | 珠海格力电器股份有限公司 | Dish washing machine, control method and device thereof and storage medium |
| CN113892890B (en) * | 2021-10-15 | 2023-08-29 | 珠海格力电器股份有限公司 | Dish washer, control method and device thereof and storage medium |
| CN114224257A (en) * | 2021-11-25 | 2022-03-25 | 珠海格力电器股份有限公司 | Control method and device of dish washing machine |
| CN114224257B (en) * | 2021-11-25 | 2023-12-05 | 珠海格力电器股份有限公司 | Control method and device of dish washer |
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