JPH02239893A - How to adjust the hot water temperature in a hot water washing machine - Google Patents

Abstract

PURPOSE:To control the internal part of a water tank at a correct water temperature without being influenced by supply water and supply hot water temperatures by, first, measuring and calculating the supply water and supply hot water temperatures, a water quantity and a flow rate, calculating a remaining water quantity up to target temperature and water quantity from the values, converting them to the opening times of respective electromagnetic valves, and executing the supply of water and hot water. CONSTITUTION:Water in a small quantity is fed into a water tank 1, the water temperature in the water tank 1 is detected by a temperature sensor 9, and the feed water flow rate is calculated by a water level sensor 8 and a timer. Next, while continuing the hot water, supply the temperature in the water tank 1 is measured, it is measured again after a fixed time, and the supply hot water temperature is inversely calculated by the increase degrees of the temperature and water quantity between a previous time and a present time. Simultaneously, the supply hot water flow rate is calculated from the water quantity of the increase degree and the supply time of the hot water. Next, the remaining supply hot water quantity and supply water quantity made into the target temperature and water quantity are calculated from the water quantity, water temperature, supply hot water temperature and supply water temperature in the water tank 1 at the present time. Next, the remaining supply hot water quantity and supply water quantity are divided by the supply water flow rate and supply hot water flow rate obtained before, respectively, they are converted to the supply hot water and supply water times, and the supply of water and hot water are simultaneously executed as the opening times of a supply water side electromagnetic valve 6 and a supply hot water side electromagnetic valve 7.

Description

Detailed Description of the Invention [Field of Application in "Industry" 2] The present invention provides a method for adjusting the temperature of hot water flowing into a hot water washing machine, which can arbitrarily and accurately adjust the temperature of the washing water according to the 11 conditions. There is something about it.

[Prior Art] The temperature of washing water has an optimum temperature depending on the type of laundry and how dirty it is. Generally, leftover hot water from a bath is often used because it does not damage fabrics or the washing machine and removes dirt easily. In some cases, hot water heated by an instantaneous waste water heater is led to a washing machine using a hose.

On the other hand, in foreign countries, a washing machine is equipped with a hot water supply [1] and a water inlet, a solenoid valve is attached to each [1], and washing is done by turning the solenoid valves ON and OFF from the control panel of the washing machine. There is a known system in which hot water is supplied into the tank of the machine to obtain 1" hot water. The operating mode (control mode 1-) in this known example is as follows.

[Problems with the Prior Art] As is clear from the publicly known examples listed in Section 7, in conventional washing, hot water is selected from the viewpoint of removing dirt, regardless of the material, color, dirt, etc. of the laundry. In general household laundry, there are few items that are heavily soiled, and more items that are washed frequently, such as underwear and socks. In addition, recent laundry has diversified in materials and colors, and each has its own optimal washing temperature.

However, including the publicly known examples in foreign countries mentioned above, it is not possible to obtain hot water that matches the target water temperature to some extent, or the temperature is not constant depending on the hot water supply temperature or the water supply temperature, or the amount of water is not constant depending on the water pressure. The drawback is that it is not possible to accurately adjust the temperature to the optimum washing temperature required for the laundry.

SUMMARY OF THE INVENTION An object of the present invention is to propose a method for adjusting the hot water temperature in a washing machine that can accurately adjust the temperature according to the amount of laundry to be washed.

[1000 Steps to Solve the Problems] The present invention solves the above-mentioned technical problems by the following means.

(]) Supply a small amount of water into the water tank of the washing machine, measure the water temperature, water supply time, and amount of water, and calculate the water supply flow rate from the water supply time and water amount. While supplying hot water to J
The increasing water temperature in the water tank, the hot water supply time, and the increased water volume are repeatedly measured at fixed time intervals, and the hot water supply flow rate is calculated each time from the increased water volume and hot water supply time, and the hot water supply temperature is calculated from the increased water volume and temperature rise. Calculate backward each time, and determine the hot water temperature when it is stable at the hot water temperature determined by this backward calculation. Next, calculate the remaining amount of water up to the set target washing water amount, and determine the amount of water when the hot water temperature is determined. At the same time, calculate the remaining water supply amount and hot water supply amount to reach the set washing target temperature, convert the water supply flow rate and hot water supply flow rate obtained earlier into the opening time of the solenoid valve for water supply and hot water supply, and A method for regulating hot water temperature in a hot water washing machine, comprising: opening a solenoid valve for each time period.

(2) When the water supply and hot water temperature change at the time of startup, the temperature of the water in the water tank, the water supply time, and the increased water volume are repeatedly measured at regular intervals while water is being supplied to the water tank of the washing machine, and the increased water volume is measured. The water supply flow rate is calculated each time from the water supply time and water supply time, and the water supply temperature is calculated backward each time from the increase in water volume and temperature change, and the water supply flow rate and water supply temperature are determined when the water supply temperature calculated by back calculation becomes stable. ,next,
While supplying hot water into the aquarium, the water temperature in the aquarium that rises due to hot water supply, the hot water supply time, and the increased water volume are repeatedly measured at regular intervals, and the hot water supply flow rate is calculated each time from the increased water volume and the hot water supply time, and the water volume is calculated. The hot water supply temperature is calculated backward each time based on the increase and the temperature rise, and the hot water temperature is determined when the hot water temperature determined by this backward calculation or a stable point is determined. Next, the remaining amount of water up to the set target water amount for washing is heated. Calculate based on the amount of water when the temperature is determined, and also calculate the remaining water supply amount and hot water amount to reach the set target washing temperature, and calculate the water supply and hot water supply solenoid valve from the previously determined water supply flow rate and hot water supply flow rate. A method for adjusting hot water temperature in a hot water washing machine, comprising means for converting the open time into open time and opening each solenoid valve during this time.

In the above method, the solenoid valves for water supply and hot water supply are opened at the same time until the water amount and water temperature in the aquarium reach the target temperature. I'll come.

Next, first, water is supplied into the washing tank, and then hot water is supplied, and the water is tl41! Until the temperature has been confirmed, try rotating the washing machine's balster to stir the water to equalize the water temperature and measure the temperature of the water in the aquarium with higher accuracy. good. However, if water is supplied into the aquarium or the water is sufficiently agitated due to the head difference when hot water is supplied, the balse bar does not necessarily need to be rotated.

In addition, in the configuration of the present invention, water is supplied first and the water temperature, water amount, and water supply time are measured to calculate the flow rate, or hot water is supplied first and the hot water temperature and hot water supply time are measured using the same method. The flow rate may also be calculated, and the present invention includes this case as well.

Next, calculate the remaining water supply amount and hot water amount to reach the target water amount, and measure the water temperature and water amount repeatedly at fixed time intervals while simultaneously opening the solenoid valves for each water supply and hot water supply time to reach the target temperature each time. By recalculating the remaining water supply amount and hot water supply amount and correcting the error by changing the opening time of each solenoid valve, it is possible to control the water temperature with higher accuracy.

[Operation] When the laundry is put into the water tank and the operation switch is turned on, the controller or solenoid valve on the water supply side is opened for a certain period of time and water is supplied into the water tank. When water is supplied into the water tank, the temperature of the supplied water is measured by a temperature sensor, and the amount of water is measured by a water amount sensor and inputted as data to the controller. Additionally, the controller measures the opening time of the solenoid valve using a timer, and this time is also input as data.

When the controller receives these data, it calculates the water supply flow rate from the water supply amount and its time, and stores it as data.

Next, the controller opens a solenoid valve for hot water supply and starts supplying hot water into the water tank. When this hot water supply starts, the water temperature and amount of water in the water tank and the hot water supply time are repeatedly measured at fixed time intervals, and this data is input to the controller. When the controller receives this data, it calculates the hot water supply flow rate from the increased water volume and hot water supply time each time, calculates the hot water temperature from the increase in water volume and temperature rise, and stabilizes the hot water temperature determined by this back calculation. Repeat this back calculation and determine the hot water supply flow rate and temperature at a stable point. However, since the hot water supply flow rate rarely changes over time, this flow rate may be determined using the initially calculated value.

Note that the balsator is rotating during the work of determining the water supply, hot water supply temperature, water volume, flow rate, and time.

After the control circuit inputs the following data and performs calculations,
Calculates the remaining water supply and hot water supply amount until the target water volume and temperature for washing is calculated, converts this into the opening time of each solenoid valve, and the solenoid valve on the water supply side is opened again and continues to be opened until the time. The solenoid valves on the hot water supply side also continue to open, and each solenoid valve closes when the closing time is reached.

In the above operation, it is assumed that the supply water temperature is constant from the beginning, or the supply water temperature is also constant. If the temperature changes during water supply, the water supply temperature may be determined by repeatedly performing measurements and calculations at fixed time intervals while supplying water in the same way as when calculating the water supply temperature, and when the calculated value becomes stable.

Next, start the hot water supply first, then start the water supply, measure each temperature, water volume, flow rate, and time, and calculate the water volume and water temperature to reach the target. {
It is the same as the Book of J.

[Example and its construction] The figure shows a hot water washing machine in which the present invention is implemented, where 1 is a water tank, 2 is a dewatering tank, 3 is a balsator, and 4 is a water supply.
6., 5 is a candy thirst? 6., 6 is a water supply side electromagnetic valve, 7 is a hot water supply side electromagnetic valve r, 8 is a water level sensor using a water river, 9 is a temperature sensor, and lo is a controller (microcomputer).

In the above embodiment, (1) When the operation switch is turned on, the water supply side solenoid 6 is opened in response to a command from the controller 1o, and a small amount of water is once supplied into the water tank 1 and stirred by the pulsator 3. Then, the water temperature (T) in the water tank 1 is detected by the temperature sensor 9, and the controller 1o
He was admitted to the sword. At the same time, this small amount of water supply and water supply time are measured by the water level sensor 8 and the timer, respectively, and the water supply flow rate (F
) cannot be calculated.

■Next, the solenoid valve 7 on the hot water supply side is opened and hot water starts being supplied into the water tank l. At this time, the balsator 3 continues to rotate, and while continuing to supply hot water, the temperature in the water tank 1 (T+-
+), then measure again after a certain period of time (Ti)Lz,
The hot water supply temperature is calculated backwards in the controller 1O from the increase in temperature and water amount between the previous time and this time.

At the same time, the hot water supply flow rate (F1.) from the increased water volume and hot water supply time
Calculate.

In other words, the candy bath temperature (TH) is Q. -Qi-, However, Q. : Current amount of water in the tank l Q, -,: Previous water volume in tank l can be calculated.

Note that the initial hot water temperature is often unstable due to delays in the start-up of the piping system and water heater, so repeat the above measurement several times and calculate the temperature when the calculated T1 becomes constant (when it becomes stable). ), determine the hot water temperature.

In addition, ITu+ (this time) −Tl{j−+ <荊times) 1≦ Δ
For example, 8T is about 0.5°C. Then, Tl+ < 35°C or T II < T S
(Target crystallinity) If it is determined that the temperature is too high for hot water supply, it will be impossible to continue.

■Next, calculate the remaining hot water supply amount and water supply amount to reach the target temperature and water amount (Q,) by calculating the current amount of water in tank 1, water temperature, hot water temperature,
Calculate using the following formula from the supply water temperature.

QH;=QS(TS-TW)-Q;(T;-
TW ) To T i Q, i= Qs −Q. i However, Qoi: Remaining hot water supply amount for this time Qwi: Remaining water supply amount for this time■Next, the remaining hot water supply amount and water supply amount are divided by the previously determined water supply flow rate and hot water supply flow rate, respectively, and converted to hot water supply and water supply time. death,
The water supply side solenoid valve 6 and hot water supply side solenoid valve 7 are opened at the same time to supply water and hot water.

By repeating steps (1) and (2) above, the temperature can be corrected and the temperature can be adjusted more accurately.

[Effects of the present invention] l 4 As described above, the present invention first measures and calculates the water supply, hot water supply temperature, water volume, and flow rate, and calculates the remaining water volume up to the target temperature and water volume from these values. By converting the opening time of each electromagnetic valve into water supply and hot water supply, the water temperature in the water tank can be adjusted to an accurate temperature without being influenced by the water supply and hot water supply temperatures. Particularly, in the case of hot water supply where there is a large temperature gradient in one direction, reliable stopping performance can be expected.

As a result, it becomes possible to wash the laundry at the optimum water temperature that matches the material, color, and dirt of the laundry.

Next, the present invention can be implemented using a temperature sensor, a water flow sensor, a controller (microcomputer), and a solenoid valve, and can be easily installed in new or existing washing machines and is inexpensive. There are advantages.

[Brief explanation of drawings]

The figure is an explanatory diagram of a hot water washing machine implementing the present invention. l...Aquarium 2 -... Dehydration tank pulsator water pipe hot water pipe Water supply side solenoid valve Hot water supply side solenoid valve water level sensor temperature sensor Controller (microcomputer)

Claims (5)

[Claims] (1) Supply a small amount of water into the water tank of the washing machine, measure the water temperature, water supply time, and amount of water supplied, and calculate the water supply flow rate from this water supply time and water volume. While supplying hot water, the water temperature in the water tank that rises due to this hot water supply, the hot water supply time, and the increased water volume are repeatedly measured at regular intervals, and the hot water supply flow rate is calculated each time from the increased water volume and hot water supply time, and the increased water volume is calculated. The hot water supply temperature is calculated backward each time based on the temperature rise, and the hot water temperature is determined when the hot water temperature determined by this backward calculation becomes stable. Next, the remaining amount of water up to the set target washing water amount is calculated based on the hot water temperature. Calculate based on the amount of water when the temperature is determined, and also calculate the remaining water supply amount and hot water amount to reach the set target washing temperature, and calculate the solenoid valve for water supply and hot water supply from the previously determined water supply flow rate and hot water supply flow rate. A method for adjusting hot water temperature in a hot water washing machine, comprising means for converting the open time into open time and opening each solenoid valve during this time. (2) When the water supply and hot water temperature change at the time of startup, the temperature of the water in the water tank, the water supply time, and the increased water volume are repeatedly measured at regular intervals while water is being supplied to the water tank of the washing machine, and the increased water volume is measured. The water supply flow rate is calculated each time from the water supply time and water supply time, and the water supply temperature is calculated backward each time from the increase in water volume and temperature change, and the water supply flow rate and water supply temperature are determined when the water supply temperature calculated by back calculation becomes stable. Next, while supplying hot water into the water tank, the water temperature in the tank that rises due to hot water supply, the hot water supply time, and the increased water volume are repeatedly measured at regular time intervals, and the hot water supply flow rate is calculated each time from the increased water volume and the hot water supply time. At the same time, the hot water supply temperature is calculated backward each time from the increase in water volume and the temperature rise, and the hot water temperature is determined when the hot water temperature calculated by this backward calculation becomes stable. Next, the remaining amount of water up to the set target washing water volume is Calculate the amount of water based on the amount of water when the hot water temperature is determined, and calculate the remaining amount of water and hot water that will reach the set target washing temperature. A method for adjusting hot water temperature in a hot water washing machine, comprising means for converting the opening time of each solenoid valve into open time, and opening each solenoid valve for this time. (3) Calculate the remaining amount of water up to the target amount of water for washing, and
A claim in which the remaining water supply amount and hot water supply amount to reach the target temperature are calculated, the previously determined water supply flow rate and hot water supply flow rate are converted into the opening time of the water supply and hot water supply solenoid valves, and each solenoid valve is simultaneously opened during this time. A method for adjusting hot water temperature in a hot water washing machine according to items 1 and 2. (4) Claim 1, in which the pulsator is rotated while the measurement is being carried out while supplying water or hot water into the washing tank;
2. The method for adjusting hot water temperature in a hot water washing machine according to 2. (5) Calculate the remaining hot water supply amount and water supply amount to reach the target water amount, and measure the water temperature and water amount repeatedly at fixed time intervals while opening each solenoid valve for this water supply and hot water supply time at the same time, and each time the target temperature is reached. 3. The method of adjusting hot water temperature in a hot water washing machine according to claim 1, wherein the remaining water supply amount and hot water supply amount are recalculated and the open time of each solenoid valve is changed to correct the error.