Continuous type washing machine

Abstract

To shift an object to be washed from preliminary washing to main washing at a higher temperature without damaging detergency of proteinic stain, regarding a business-use washing device which performs steps of preliminary washing, main washing, rinsing, finishing and dewatering of an object to be washed sequentially.SOLUTION: A continuous type washing machine includes temperature raising means which increases the temperature of an object to be washed and preliminary washing water in a preliminary washing tub during a preliminary washing step of an inputted object to be washed and whose heat source is recovery heat. The temperature raising means starts an operation after the time set after the object to be washed is inputted in the preliminary washing tub or when the object to be washed is transferred to the next stage preliminary washing tub, and finishes the operation before the object to be washed is transferred to a main washing tub.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a commercial washing apparatus that sequentially performs the steps of pre-washing, main washing, rinsing, finishing, and dehydration of an object to be washed, and particularly to a washing apparatus that reuses the recovered water used in rinsing or finishing and the recovered water generated during dehydration as pre-washing water.

Background Art

[0002] In a commercial washing apparatus such as a continuous washing machine, the object to be washed is washed in the order of pre-washing, main washing, rinsing, and finishing. In order to reduce the amount of water used for washing, the drained water used for relatively low-temperature finishing and the drained water from the dehydrator are recovered and reused as pre-washing water. The rinsing drained water used for relatively high-temperature rinsing is reused as main washing water, but may also be mixed with the drained water used for finishing and the drained water from the dehydrator and used as pre-washing water.

[0003] Conventionally, for linen products used in medical institutions, etc., in order not to impair the detergency of protein stains, particularly blood stains, adhering to the object to be washed, pre-washing is performed with the pre-washing water temperature set to about 35°C or lower, and then the main washing is performed at 80°C for disinfection.

[0004] Therefore, when shifting from pre-washing to main washing, it is necessary to raise the temperature of the object to be washed and the washing water. Particularly in a continuous washing machine, if the temperature is not raised during a short cycle time (the washing time for each tank, usually about 3 minutes), the washing in the first tank of the main washing (the first tank of the main washing) cannot be properly performed. Therefore, high-pressure steam (steam generated by a boiler, hereinafter referred to as "primary steam") is blown into the first tank of the main washing to raise the temperature of the object to be washed and the washing water.

[0005] From the perspective of energy conservation, it is preferable that the amount of primary steam required when shifting from pre-washing to main washing is small. For this purpose, it is preferable that the temperature of the pre-washing water is high. The detergency of blood stains is related not only to the temperature of the pre-washing water but also to the concentration of hydrogen peroxide in the pre-washing water. Hydrogen peroxide used for bleaching the previous laundry remains in the recovered water. Also, for washing blood stains, it is preferable that the pH of the pre-washing water is high. Therefore, various means of performing pre-washing at a temperature of about 50°C have been proposed by adjusting the residual hydrogen peroxide concentration and pH of the recovered water.

[0006] For example, Patent Document 1 proposes that in the finishing step, treatment is performed with finishing water containing a neutralizing composition containing an acid agent and a hydrogen peroxide reducing agent to neutralize the residual hydrogen peroxide and reuse the water recovered in the recycling tank and the dehydrated recovered water recycling tank as the water input to the first washing tank.

[0007] In a continuous washing machine, since the pre-washing water is simultaneously introduced into the hopper of the continuous washing machine together with the laundry, it is sometimes called the input water or the immersion water. The input water also acts to reduce the frictional resistance between the laundry and the hopper and smoothly flow the laundry into the pre-washing tank. Conventionally, energy conservation has been achieved by increasing the temperature of the input water.

[0008] Also, Patent Document 2 related to the application of the applicant of the present application aims to obtain a commercial washing device capable of performing water-saving operation without reducing the removability of blood stains or protein stains, and proposes passing the recovered water from the rinsing tank of a continuous washing machine and the recovered water from the final tank or dehydrator of the continuous washing machine through a hydrogen peroxide removal device and supplying it to the pre-washing tank as pre-washing water (input water).

[0009] Further, Patent Document 3 describes heating the fresh water supplied to a washing and dehydrating machine for washing special laundry with the main washing drainage of a continuous washing machine, and using the dehydrator drainage of the continuous washing machine and the rinsing drainage after heating the fresh water supplied to the finishing tank and the rinsing tank of the continuous washing machine as pre-washing water.

[0010] In Patent Document 4, it is proposed to heat fresh water supplied to the final rinsing tank for rinsing the main washing and drainage water through a lint screen, to use the dehydration drainage and the rinsing drainage as pre-washing water, and to also use the rinsing drainage as the main washing water.

Prior Art Documents

Patent Documents

[0011]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0012] In a continuous washing machine, after pre-washing at 40°C or lower, it is necessary to raise the temperature to 80°C, which is the set temperature for the main wash, within a short cycle time, and a high temperature-raising ability is required. Therefore, it is difficult to use heat sources other than the primary steam generated by the steam boiler 51 (Fig. 4), which has been a problem when reducing the thermal energy consumed by the continuous washing machine 1.

[0013]

[0014] ​In view of the above circumstances, an object of the present invention is to enable the object to be washed to be transferred from pre-washing to main washing at a higher temperature without impairing the detergency of blood stains.

Means for Solving the Problems

[0015] The inventors of the present invention conducted various tests on the water quality, temperature, and input timing of the water used for pre-washing in the washing of an object to be washed with blood stains, and obtained the knowledge that forms the basis of the present invention. That is, the temperature of the input water introduced into the hopper together with the object to be washed is set to a temperature at which blood stains can be surely washed, and after being introduced into the pre-washing tank a (a1, a2), the input water is heated in the pre-washing tank a using the recovered heat source, so that the temperature of the object to be washed and the pre-washing water (the washing water in the pre-washing tank) when transferring from pre-washing to main washing is increased without impairing the detergency of blood stains, thereby reducing the consumption of primary steam when transferring from pre-washing to main washing and reducing the amount of primary steam consumed by the continuous washing machine 1, thus completing the present invention.

[0016] The heating of the object to be washed and the pre-washing water in the pre-washing tank a is performed in the latter half of the pre-washing process, that is, in the latter half of the cycle time when there is one pre-washing tank a, and mainly in the subsequent pre-washing tank a2 when there are multiple tanks. Specifically, heating means 30 and 40 for the washing water in the pre-washing tank are provided, and the heating means 30 and 40 are activated after a cycle time or a predetermined time set in the controller from the start of pre-washing. As a simpler heating means, after the predetermined time, the recovered warm water is heated, if necessary, by a heat exchanger using waste heat attached to the pre-washing water supply pipe 25 or the water in the warm water tank 4 by a heat exchanger or a heater using waste heat, and additionally supplied to the pre-washing tank a, and these operations are stopped immediately before transferring the object to be washed to the first main washing tank b1.

[0017] In addition, depending on the type of the object to be washed, there are cases where it is not necessary to consider the problem of blood stains, and there are also objects to be washed with minor blood stains. Therefore, when washing such objects to be washed, it is more practical to be able to wash by raising the temperature of the input water itself with the recovered heat.

[0018] The continuous washing machine 1 of the present invention is provided with temperature increasing means 30 and 40 using recovered heat, which is the heat source for increasing the temperature of the objects to be washed and the pre-washing water in the pre-washing tank a during the pre-washing process of the objects to be washed put in. The temperature increasing means 30 and 40 start operating after the time set by the setter after the objects to be washed are put into the pre-washing tank a1 or when the objects to be washed are transferred to the next-stage pre-washing tank a2, and are provided with a controller for stopping the temperature increasing means before, preferably immediately before, the objects to be washed are transferred to the main washing tank. The preferable set time is 30 to 90 seconds or 60 to 120 seconds.

[0019] More preferably, the continuous washing machine 1 of the present invention is provided with temperature adjusting means for the water to be input, which is composed of a hot water pump 22 and a solenoid valve 24 for adjusting the temperature of the water to be input that is input into the pre-washing tank a1 together with the objects to be washed using the warm water recovered from the rinsing tank c1. More preferably, the continuous washing machine 1 of the present invention is provided with heating means 7 for the fresh water supplied to the rinsing tank c3 in addition to the temperature adjusting means for the water to be input.

Advantages of the Invention

[0020] By setting the temperature of the water to be input, which is input into the pre-washing tank simultaneously with the objects to be washed, to a temperature that can surely prevent the denaturation of blood, and increasing (raising the temperature) the temperature of the objects to be washed and the pre-washing water in the pre-washing tank using the recovered heat during pre-washing, the heat energy required for raising the temperature of the washing water when transferring from the pre-washing tank to the main washing can be reduced.

[0021] And at the initial stage of the pre-washing process, pre-washing can be performed with the recovered water adjusted to a temperature that can surely prevent the denaturation and coagulation of blood stains, so that protein stains including blood can also be surely washed, and the problem that highly skilled operation is required for setting the temperature of the water to be input and judging the blood stains on the objects to be washed can be avoided.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0023] Hereinafter, the present invention will be further described with reference to the drawings. In Fig. 1 showing an embodiment of a continuous washing machine, 1 is a continuous washing machine, 2 is a dehydrator for dehydrating the laundry discharged from the continuous washing machine 1, 3 is a recovered cold water tank, 4 is a recovered warm water tank, 5 is a buffer tank mainly for storing the drainage from the main washing tank, and 6 and 7 are heat exchangers.

[0024] The laundry put into the laundry input hopper 11 of the continuous washing machine 1 is washed in the pre-washing tank a1, the main washing tanks b1 to b7, the rinsing tanks c1 to c3, and the finishing tank d, discharged from the laundry discharge port 12, and put into the dehydrator 2. The inner cylinder of the continuous washing machine 1 repeats the oscillation and one rotation during the cycle time (usually 3 to 4 minutes) set in a controller (not shown). The laundry put into the first pre-washing tank a1 is sequentially transferred to the adjacent subsequent tank every time the inner cylinder rotates once, and is put into the dehydrator 2 from the discharge port 12. In Fig. 1, the continuous washing machine 1 and the dehydrator 2 are shown separately, but actually, the dehydrator 2 is installed adjacent to the laundry discharge port 12.

[0025] In the figure, T in the circle is a thermometer, Lv in the circle is a water level gauge, P in the circle is a pump, FM in the square is a flow meter, the valve symbol with a T-shaped handle is a manual valve, and the valve symbol with a square at the horizontal part of the T-shape is an electromagnetic valve.

[0026] A general continuous washing machine 1 includes a plurality of main washing tanks b and a plurality of rinsing tanks c, and the washing water and the rinsing water flow between the plurality of tanks in a counterflow or batch flow manner. Counterflow is a method in which the washing water flows in the direction opposite to the transfer direction of the laundry between the tanks, and batch flow is a method in which the washing water is transferred together with the laundry between the tanks. The continuous washing machine 1 shown in Fig. 1 has a batch flow for the main washing and a counterflow for the rinsing.

[0027] In each tank of the continuous washing machine 1, primary steam generated by a steam boiler 51 (Fig. 4) can be supplied from a primary steam pipe 27 via a solenoid valve 31 and a solenoid valve 29 for each tank. That is, when there is no supply of flash steam or when the pressure in the flash steam pipe becomes less than the set pressure, by opening the solenoid valve 31 and the solenoid valve 29 of each tank, each tank of the continuous washing machine is heated to the temperature during steady operation. Also, in the first and second washing tanks b1 and b2 of this washing machine, flash steam generated by a flash steam generator 52 (Fig. 4) can be supplied from a flash steam pipe 28 via a check valve 32 and a solenoid valve 29 for each tank.

[0028] The continuous washing machine 1 of the embodiment in Fig. 1 is provided with a first temperature raising means 30 using flash steam as a heat source and a second temperature raising means 40 using drain or recovered water from the main washing tank b as a heat source. In an actual continuous washing machine, depending on the form of utilization of the exhaust heat of the washing factory where the machine is installed, either one of the temperature raising means may be provided.

[0029] The first temperature raising means 30 is a means for supplying flash steam (steam obtained by evaporating the drain of a device using primary steam as a heat source by utilizing the sensible heat of the drain in a reduced pressure environment) generated by a flash steam generator 52 (Fig. 4) to a pre-washing tank a by opening a solenoid valve 29 in a pipe connecting the flash steam pipe 28 and the pre-washing tank a (a1 in Fig. 1, a2 in Fig. 2).

[0030] The second temperature raising means 40 is a heat exchanger 6 or a heater 8 using, as a heat source, the drain of, for example, a finisher 53 or a dryer 54 (Fig. 4) that discharges high-temperature drain, or the drainage (main washing drainage) from the main washing tank b of the continuous washing machine 1 itself. In the example of Fig. 1, a circulation pipe 41 for circulating the washing water in the pre-washing tank a1, a circulation pump 42 provided in the pipe, and a heat exchanger 6 are provided. The second temperature raising means 40 shown in Fig. 2 is provided with a heater 8 at the bottom of the outer cylinder 9 of the pre-washing tank a2, and by flowing the drain of the finisher 53 or the dryer 54 (Fig. 4), or the recovered warm water or the main washing drainage of the continuous washing machine 1 itself through the heater, the pre-washing water in the pre-washing tank a2 is heated.

[0031] Note that Fig. 1 shows a continuous washing machine with one pre-washing tank, and Fig. 2 shows a continuous washing machine with two pre-washing tanks. Examples of the respective second temperature-raising means 40 can be adopted regardless of the number of pre-washing tanks. When it is desired to utilize the recovered warm water of the continuous washing machine 1 itself or the heat of the main wash waste water, if the pre-washing tank is made into two tanks, the pre-washing water can be heated over time.

[0032] In the continuous washing machine 1 where the main wash is in batch flow and the rinsing is in counter flow, since the temperature of the first rinsing tank c1 becomes about 70°C, the pre-washing water can be heated by directly supplying the recovered warm water in the recovered warm water tank 4 to the pre-washing tank. When there are multiple pre-washing tanks, when the object to be washed is transferred to the second pre-washing tank a2, the recovered warm water may be supplied to the second pre-washing tank a2. However, if the recovered warm water is supplied to the pre-washing tank a1 60 to 120 seconds after the start of pre-washing to start heating, and the object to be washed transferred to the second pre-washing tank a2 and the pre-washing water are further heated by the temperature-raising means 30 or 40 (Fig. 2) provided in the second pre-washing tank, the temperature of the pre-washing water can be made higher without using additional equipment such as a heat exchanger.

[0033] After the object to be washed and the input water are put into the pre-washing tank a1, after a predetermined time set according to the degree of blood stain on the object to be washed, usually 30 to 90 seconds when there is one pre-washing tank and after one cycle time when there are two pre-washing tanks, flash steam is supplied to the pre-washing tank a2, or the electromagnetic valve 43 of the heat exchanger 6 or the heater 8 is opened to heat the pre-washing water before transferring the object to be washed to the main washing tank b1.

[0034] Note that when heating the pre-washing water with one pre-washing tank, it is heated during the first cycle time and transfers to the main wash in the second cycle time, so the overall washing time can be shortened. Also, in the temperature-raising means 40 that uses the heat exchanger 6 and circulates the pre-washing water with the circulation pump 42, in addition to the effect of assisting the input of the object to be washed by returning the heated water to the object to be washed input hopper 11, there is a feature that the temperature-raising time of the object to be washed can be shortened by directly applying the pre-washing water heated to the object to be washed.

[0035] On the other hand, in the method of using two pre-washing tanks and heating up the water in the second tank, since the water is not heated in the first tank, the temperature at the initial stage of pre-washing can be maintained at a low level, thus improving the cleaning performance for blood stains. It is also possible to adjust the water volume at the timing of transferring to the second tank, reduce the water volume, and then heat up, resulting in no energy loss and achieving a high energy-saving effect.

[0036] The heat sources of the heat exchanger 6 and the heater 8 of the second heating means 40 can be the drained water from the buffer tank 5. However, in order to heat up the pre-washing water as high as possible in a short time, especially when there is only one pre-washing tank, it is effective to use the drained water from other equipment that discharges hotter drained water installed in the laundry factory. Fig. 4 is a diagram showing an example of the flow (utilization relationship) of the equipment, primary steam, and its drain (condensate) installed in the laundry factory. The finishing machine 53 and the dryer 54 discharge drained water at a higher temperature than the continuous washing machine 1. In the example of Fig. 4, an example is shown in which the drained water from the dryer 54 is used as the heat source for the heat exchanger 6 and the heater 8 to raise the temperature of the pre-washing water, and when it is insufficient, the drained water from the finishing machine 53 is used (the dotted line in the figure).

[0037] When the object to be washed is transferred to the first main washing tank b1, the solenoid valve 29 of the pipe connecting from the flash steam pipe 28 to the first main washing tank b1 is opened, so that the object to be washed and the washing water transferred from the pre-washing tank a are heated to the required temperature of 80°C in the main washing process. When it cannot be sufficiently heated by the flash steam, the solenoid valve 36 is opened while the solenoid valve 29 is kept open, and the primary steam supplied from the primary steam pipe 27 is used.

[0038] Note that the usage relationship of the drain shown in Fig. 4 is an example of a steady state. At the start of the factory operation, since the exhaust heat of the finisher 53 and the dryer 54 cannot be utilized, primary steam is used. The solenoid valve 31 connecting the primary steam pipe 27 and the flash steam pipe 28 in Fig. 1 is provided with a solenoid valve 31 that automatically opens when there is no operation preparation completion signal from the flash steam generator 52 or when the pressure in the flash steam pipe 28 falls below the set pressure, and a check valve 38 that blocks the outflow of primary steam is provided at the inlet of the flash steam pipe 28. When the flash steam generator 52 is starting up during preparation, by opening the solenoid valve 31 and the solenoid valve 29, the primary steam flowing into the flash steam pipe 28 can be used to warm the pre-washing tank and the main washing tank.

[0039] In the continuous washing machine 1 of Fig. 1, in order to separately reuse the relatively low-temperature drainage and the relatively high-temperature drainage, a recovered cold water tank 3 and a recovered warm water tank 4 are provided. In the recovered cold water tank 3, the recovered cold water from the dehydrator flows in through the dehydration recovery pipe 15, and the recovered cold water from the finisher tank d flows in through the finished water recovery pipe 14 and is stored. In the recovered warm water tank 4, the recovered warm water from the rinsing tank c1 flows in through the rinsing water recovery pipe 13. In the buffer tank 5, mainly the high-temperature drainage from the final main washing tank b7 flows in and is stored. The recovered cold water tank 3 and the recovered warm water tank 4 are provided with thermometers 46 and 47.

[0040] Although not shown in the figure, detergents are supplied from a detergent supply device to the pre-washing tank a1 and the first main washing tank b1. Also, for example, in the main washing tanks b2 to b3 after the detergent is supplied, hydrogen peroxide is supplied from a bleaching agent supply device. As described above, when washing medical-related linen items with protein stains typified by blood stains in a continuous washing machine, in order to avoid the problem that the protein stains become denatured and cannot be washed off, the temperature of the pre-washing water cannot be increased, and depending on the concentration of hydrogen peroxide in the recovered water used as the pre-washing water, it is necessary to wash at a temperature of 50 to 40 °C or lower.

[0041] In the continuous washing machine 1 of FIG. 1, the recovered cold water in the recovered cold water tank 3 is sent to the laundry loading hopper 11 through the cold water supply pipe 18 and the pre-wash water supply pipe 25 by driving the cold water pump 17. The recovered warm water in the recovered warm water tank 4 is sent to the laundry loading hopper 11 through the warm water supply pipe 23 and the pre-wash water supply pipe 25 by driving the warm water pump 22.

[0042] Therefore, by controlling the rotational speed or driving time of the cold water pump 17 and the warm water pump 22 at the time of loading the laundry based on the detected values of the thermometers 46 and 47, the temperature of the incoming water that first contacts the loaded laundry can be adjusted to an appropriate value, that is, adjusted according to the amount of blood stain and the hydrogen peroxide concentration of the laundry. Also, it is effective in terms of removing blood stains and raising the temperature of the pre-wash water to supply only the recovered cold water at the time of loading the laundry and supply the recovered warm water with a time difference.

[0043] At the time when a set time, for example, 30 to 90 seconds has elapsed since the continuous washing machine 1 starts the rocking motion, at least one of the supply of flash steam to the pre-wash tank a and the start of operation of the second heating means 40 is started. More preferably, when there is one pre-wash tank, the heating timing is varied according to the temperature of the pre-wash water in the first pre-wash tank after the incoming water supply. For example, if the temperature of the pre-wash water after the incoming water supply (about 20 to 30 seconds after the start of the cycle time) is 40°C or less, heating is started immediately at that time, and if it is 40°C or more, the heating start timing is controlled according to the hydrogen peroxide concentration and the degree of blood stain of the pre-wash water and the pre-wash water temperature. As a result, the pre-wash water is heated in the pre-wash tank a within the remaining time of the cycle time. When the remaining time is short, both the supply of flash steam and the heating by the heat exchanger 6 and the heater 8 are used, and when there is a margin in the remaining time, it may be heated by one of them, but for the purpose of energy saving, it is preferable to heat to as high a temperature as possible.

[0044] When the cycle time ends, the objects to be washed in the pre-washing tanks a1 to a2 are transferred to the first main-washing tank b1 by one rotation of the inner cylinder. At this time, since the objects to be washed and the pre-washing water are heated to 50 to 60 °C or higher by the temperature-raising means 30 and 40, the consumption of primary steam required to heat them to 80 °C in the first main-washing tank b1 can be reduced. In some cases, it is also possible to heat with flash steam, and the amount of fuel consumed by the boiler 51 can be reduced.

[0045] On the other hand, in main washing, from the viewpoints of sterilization and washing efficiency, the temperature of the main-washing water needs to be 80 °C or higher. Therefore, steam is blown into the washing water transferred together with the objects to be washed from the pre-washing tank a1 from the primary steam pipe 27 or the flash steam pipe 28 to heat the washing water in the first main-washing tank b1. In order to perform this heating in one go, it is preferable to use high-pressure primary steam for heating in the first main-washing tank b1.

[0046] As shown in FIG. 2, if a plurality of pre-washing tanks are provided, normal pre-washing is performed in the first pre-washing tank a1, and the pre-washing water is heated in the second pre-washing tank a2, then the pre-washing water can be heated over a longer period of time, the supply pipe for flash steam to the pre-washing tank becomes unnecessary, or the heat exchanger 6 and the heater 8 of the second temperature-raising means 40 can be made of a smaller capacity, etc.

[0047] The apparatus shown in FIG. 1 is provided with a heat exchanger 7 for heating the fresh water supplied to the rinsing tank c3 with the recovered water stored in the buffer tank 5 that also stores the drainage from the main-washing tank b7. If the fresh water supplied to the rinsing tank c3 is heated with the recovered water, the temperature of the recovered warm water also becomes higher, and by using it as the main-washing water, the steam consumption required to heat the main-washing water is reduced, so further energy savings can be achieved.

[0048] It is desirable to use soft water with a hardness component removed to a hardness of 10 ppm or less for the washing water, particularly the fresh water supplied to the rinsing tank, by a softening device, and a softening device (not shown) is installed in the fresh water supply pipe 26 as necessary.

Explanation of reference numerals

[0049] 1 Continuous washing machine 6,7 Heat exchanger 17 Cold water pump 18 Cold water supply pipe 22 Hot water pump 23 Hot water supply pipe 25 Pre-washing water supply pipe 27 Primary steam pipe 28 Flash steam pipe 30 First heating means 40 Second heating means a Pre-washing tank b Main washing tank c Rinsing tank d Finishing tank

Claims

1. A continuous washing machine comprising one or more pre-washing tanks, recycling recovered cold water collected from a finishing tank or a dehydrator as feed water to be introduced into the pre-washing tank together with the object to be washed, and transferring the object to be washed to an adjacent subsequent tank every cycle time set in a controller, the continuous washing machine further comprising a heating means for heating the washing water in the pre-washing tank after the feed water is introduced, and the controller starting the operation of the heating means after the object to be washed and the feed water are introduced into the pre-washing tank and ending the operation before the object to be washed is sent from the pre-washing tank to the main washing tank.

2. The continuous washing machine according to claim 1, wherein the heating means is a flash steam supply means comprising a flash steam pipe for supplying flash steam generated by a flash steam generator to the pre-washing tank and a solenoid valve for opening and closing a pipeline connecting the pipe and the pre-washing tank.

3. The continuous washing machine according to claim 1, wherein the heating means is a heat exchanger or a heater using steam drain from other equipment installed in a laundry factory where the continuous washing machine is installed or recovered water from the main washing tank as a heat source.

4. The continuous washing machine according to claim 1, wherein the heating means is a means for additionally supplying drainage from the first rinsing tank of the continuous washing machine to the pre-washing tank.

5. A continuous washing machine comprising a recovered cold water tank for storing drainage from the continuous washing machine or a dehydrator installed adjacent to the washing machine, a recovered warm water tank for storing drainage from the rinsing tank, and respective pumps and pipes for introducing the recovered water from these tanks into the pre-washing tank simultaneously with the object to be washed, and the controller controlling the rotation speed or driving time of these pumps at the time of introducing the object to be washed to adjust the temperature of the feed water.

6. The continuous washing machine according to claim 5, further comprising a heat exchanger for heating fresh water supplied to the rinsing tank.

Images