WO2020043146A1

WO2020043146A1 - Dry cleaning machine, dry cleaning system, and dry cleaning method

Info

Publication number: WO2020043146A1
Application number: PCT/CN2019/103182
Authority: WO
Inventors: 陈志华; 沈孔亮
Original assignee: 美丰工业有限公司
Priority date: 2018-08-31
Filing date: 2019-08-29
Publication date: 2020-03-05
Also published as: CN110872770A

Abstract

The present invention provides a dry cleaning system, comprising a dry cleaning machine, the dry cleaning machine comprising a dry cleaning drum; a vacuum-pumping device, the vacuum-pumping device being able to be in fluid communication with the dry cleaning drum; a vacuum degree sensor and/or an oxygen content detector; and a control means, the control means being configured to be able to communicate with the vacuum degree sensor and/or the oxygen content detector. The vacuum-pumping device can be actuated to establish and maintain a negative pressure within the dry cleaning machine, and the control means is configured to actuate the dry cleaning machine when the vacuum degree and/or the oxygen content detected by the vacuum degree sensor and/or the oxygen content detector are below preset values, so as to start at least one operation on an object. Use of the dry cleaning system can improve the dry cleaning efficiency, particularly, the safety of the dry cleaning process, and further exert the detersive power of a solvent. In addition, the present invention also relates to the dry cleaning machine and a dry cleaning method using the dry cleaning system.

Description

Dry cleaning machine, dry cleaning system and dry cleaning method

Technical field

The invention relates to a dry cleaning system, in particular to a large-scale dry cleaning system used in industry. In addition, the present invention also relates to a dry-cleaning machine and a method for dry-cleaning objects using a dry-cleaning system, wherein the dry-cleaning process may include, for example, washing the objects with a solvent, drying the objects with hot air, and drying the objects with air. .

Background technique

For decades, due to its strong detergency and easy availability, the dry-cleaning solvents used to wash clothes have been dominated by liquid chlorinated hydrocarbon organic solvents, mainly tetrachloroethylene (PERC).

First, however, tetrachloroethylene can be toxic. After research by the US Environmental Protection Agency and other scholars, it is believed that it is carcinogenic in animal experiments and is likely to be carcinogenic to humans. In particular, the toxicity of tetrachloroethylene may be damage to the brain and nervous system, immune system, kidneys, and blood.

Second, most tetrachloroethylene is released into the atmosphere when used directly in the dry cleaning industry. Others are released from dry-cleaned clothing or other consumer products. Tetrachloroethylene decomposes very slowly in the air and can be transported long distances in the air. Generally, according to the requirements of environmental protection, the average concentration of tetrachloroethylene in the air should be less than 1 microgram per cubic meter of air. In particular, because tetrachloroethylene contains ODS substances, it also damages the earth's atmospheric ozone layer.

In addition to the toxic substances released into the air, various industries using tetrachloroethylene (such as metal degreasing and dry cleaning) produce liquid wastes containing the compound, which may eventually enter waste treatment facilities. On the one hand, tetrachloroethylene does not evaporate from water into the air. On the other hand, although some tetrachloroethylene may remain in the water, it decomposes slowly in water. This is not good for human health when tetrachloroethylene migrates into the air of homes and buildings through steam intrusion or through groundwater (or soil).

In addition, pollution will also occur when tetrachloroethylene is removed from waste disposal sites. This is because tetrachloroethylene cannot evaporate from shallow soil or below soil, so it will pollute the land and affect plant growth. The soil also decomposes very slowly, which is also bad for environmental protection.

For these reasons, tetrachloroethylene has been severely restricted by environmental protection agencies around the world. Currently, as an alternative, hydrocarbon solvents are gradually being used as dry cleaning solvents.

As an example, the physical and chemical properties of hydrocarbon solvents include: relative density: 0.80-0.87 g / cm3; boiling point: 150-200 degrees Celsius; flash point: 38-64 degrees Celsius; appearance is colorless and transparent liquid; oil soluble KB Value (industrial indication of the solvent's ability to dissolve resinous substances, commonly used to measure the kauributol value (KB value)): 24-39, especially 31-35; surface tension: 25-27N / m. It is worth noting that, generally, the higher the KB value, the stronger the fat-dissolving ability and the better the cleaning performance.

At present, the general work flow of a conventional dry cleaning machine includes multiple steps, such as a washing step, a dehydration step, a drying step, a deodorizing step, and the like.

Specifically, before the dry-cleaning process begins, the clothes door is opened, the items to be dry-cleaned are placed in a dry-cleaning drum of a dry-cleaning machine, preferably a dry-cleaning drum in the form of a clothes basket, and the clothes-door is closed. Then, a dry-cleaning solvent, such as a hydrocarbon solvent, is injected into the dry-cleaning drum, and then the dry-drying drum motor is used to drive the dry-cleaning drum to reciprocate to wash the articles.

After the washing process, the drying step can be selectively added according to the nature of the objects, especially the clothes or materials. In order to dry objects, air, especially hot air, needs to be circulated in the dry-cleaning machine.

In addition, after the drying step, a deodorizing step may be selectively added according to the nature of the object, especially the clothes or materials. During the deodorization process, the air temperature no longer rises. At this time, the dry cleaning drum motor still drives the dry cleaning drum to reciprocate, so that different parts of the laundry can be exposed to the air flowing through it. The temperature of the object is reduced by means of cold air (in this case, unheated air).

Finally, after the entire dry cleaning process, the clothes door is opened to remove the items.

In general, the cleaning cycle time of a dry cleaning machine is mainly determined by the drying time (the time to recover the solvent in the object). The length of the drying time is affected by the following conditions: drying temperature, the amount of air flowing during drying, the total weight of the object, and the thickness of the object.

However, the hydrocarbon solvent dry cleaning machines currently on the market have the following disadvantages:

For example, the decontamination ability of hydrocarbon solvents is very limited, and the objects to be cleaned are not clean enough. This is mainly due to the low solubility value KB of the hydrocarbon solvents themselves.

For another example, the effect of short drying time is not good, and more solvents remain in the object, so the smell of the solvent will evaporate from the object. If clothes or materials are to be thoroughly dried, this in turn results in too long drying (ie, recycling of solvents in the articles), which results in low production efficiency of the machine.

As mentioned earlier, the boiling point of hydrocarbon solvents is approximately 150-200 degrees Celsius, and its flash point is approximately 38-64 degrees Celsius. In order to ensure that the objects are dried under safe conditions, the drying temperature should not exceed 75 degrees Celsius. Therefore, the solvents in the objects are difficult to be effectively recovered at low temperatures (here, less than 75 degrees Celsius).

In addition, the safety of hydrocarbon solvent dry cleaning machines is currently unstable. In order to meet safety requirements, manual nitrogen fire extinguishing devices are required.

So far, in the field of dry cleaning machines, there is a need for improving safety, further exerting the decontamination ability of solvents, and improving drying efficiency.

Summary of the Invention

To this end, in one aspect, the present invention provides a dry cleaning system including a dry cleaning machine, the dry cleaning machine including a dry cleaning drum, a solvent for dry cleaning can be injected into the dry cleaning drum to wash the objects contained in the dry cleaning drum, the dry cleaning system also Including: vacuum pumping equipment, which can be connected in fluid communication with the dry cleaning cylinder; a vacuum sensor for sensing the vacuum in the dry cleaning machine; a control device, the control device is configured to be communicatively connected with the vacuum sensor; The evacuation device can be actuated to establish and maintain a negative pressure in the dry cleaning machine, and the control device is configured to actuate the dry cleaning machine when the vacuum sensor detects that the vacuum is below its preset value to activate at least one of the objects Kind of operation.

In another aspect, the present invention provides a dry cleaning system including a dry cleaning machine. The dry cleaning machine includes a dry cleaning drum, and a solvent for dry cleaning can be injected into the dry cleaning drum to wash the objects contained in the dry cleaning drum. The dry cleaning system further includes: Vacuum equipment, evacuation equipment can be connected in fluid communication with the dry-cleaning drum; oxygen content detector for detecting the oxygen content in the dry-cleaning machine; control device, the control device is configured to be communicatively connected with the oxygen content detector; The device can be actuated to establish and maintain a negative pressure in the dry cleaning machine, and the control device is configured to activate the dry cleaning machine when the oxygen content detector detects that the oxygen content is below its preset value to activate at least one of the items operating.

With any of the above-mentioned dry cleaning systems, the efficiency of dry cleaning can be improved, especially the safety of the dry cleaning process can be improved, and the detergency of the solvent can be further exerted.

In particular, the control device may be configured to enable the washing of the objects with a solvent and / or the drying of the objects with an air flow when the dry cleaning machine is activated. Therefore, the efficiency and safety of dry cleaning can be selectively increased at various stages of dry cleaning.

Preferably, the dry cleaning machine further includes a fluid channel, and the dry cleaning cylinder is connected in fluid communication with the fluid channel through its fluid outlet and fluid inlet, respectively, so that the dry cleaning cylinder and the fluid channel can form a circuit, and the circuit is configured to circulate gas through Dry cleaning canister. In particular, the evacuation device can be arranged to selectively access a fluid channel in a closable circuit so that a vacuum can be evacuated from the fluid channel and thus from the dry-cleaning drum. With this fluid channel, the vacuuming process is more convenient, and it helps to ensure the vacuum degree of the entire fluid working circuit.

In an advantageous case, the dry cleaning machine may further include a solvent heating device configured to heat the solvent injected into the dry cleaning barrel when the vacuum degree in the dry cleaning barrel is below a preset value. Solvent heating equipment can significantly improve the detergency of current solvents without explosion.

In particular, the solvent heating device can be configured to monitor the temperature of the solvent flowing through it, so that the solvent heating device stops heating the solvent after the solvent reaches the set temperature to ensure that the solvent does not exceed the temperature threshold and affect the efficiency of dry cleaning And the security of the entire system.

In particular, the dry cleaning machine may include a solvent gas recovery device including a condenser disposed in the fluid passage so that the solvent can be separated from the air flowing through the condenser. Thereby, the solvent can be further collected from the object, and the air-drying efficiency can be greatly improved.

Preferably, the evacuation device may be arranged to access the fluid passage at a position downstream of the condenser in the fluid passage. In this way, the air extracted from the dry cleaning cylinder can be passed through the condenser to ensure that the solvent content in the extracted air is greatly reduced, so that the environmental impact can be minimized.

In addition, the dry cleaning system may also include a flammable gas content detector for detecting the flammable gas content in the dry cleaning cylinder. The flammable gas content detector is in communication with the control device. During the drying process of the object, the control device is configured to the flammable gas content. The object drying process is only stopped below its preset value. When the flammable gas content detector is not below its preset value, this indicates that the solvent content in the object is still high. At this time, continue to dry the object to further reduce the solvent content in the object to below the preset value.

In particular, the dry cleaning machine may further include an adjustable-speed fan capable of being connected to the fluid channel, so that the gas in the dry cleaning cylinder circulates through the fluid channel.

Advantageously, the dry cleaning machine may further include a vacuum breaking valve, which can selectively access the fluid passage so as to be able to suck air from the outside of the dry cleaning machine to destroy the negative pressure in the dry cleaning machine. Therefore, it is possible to make it difficult to open the clothes door due to negative pressure when the clothes door is opened.

In another aspect, the present invention also provides a dry cleaning machine, including: a dry cleaning drum, a solvent for dry cleaning can be injected into the dry cleaning drum to wash the objects contained in the dry cleaning drum, and the dry cleaning system further includes: a vacuum device, a vacuum The device can be connected in fluid communication with the dry cleaning drum, wherein the vacuuming device can be activated to establish and maintain a negative pressure in the dry cleaning machine when the vacuum and / or oxygen content in the dry cleaning machine is below its preset value The dry cleaning machine is actuated to initiate at least one operation on the article. With this dry cleaning machine, the efficiency of dry cleaning can be improved, especially the safety of the dry cleaning process can be improved, and the detergency of the solvent can be further exerted.

In another aspect, the present invention also provides a method for dry cleaning with a dry cleaning system, comprising: injecting a solvent for dry cleaning into a dry cleaning drum of a dry cleaning machine in the dry cleaning system to wash articles contained in the dry cleaning drum, the method It also includes: establishing and maintaining a negative pressure in the dry cleaning machine by evacuating, wherein when the vacuum and / or oxygen content in the dry cleaning machine is below its preset value, the dry cleaning machine is activated to start at least one of the objects. Kind of operation. The dry cleaning method can improve the efficiency of dry cleaning, especially the safety of the dry cleaning process, and further exert the detergency of the solvent.

In particular, the preset values of the vacuum degree and / or the oxygen content in the dry-cleaning cylinder can be determined by the type of the solvent, so that different vacuum degrees and / or different types of solvents (flash points, ignition points, etc.) can be achieved. Or oxygen content to optimize dry cleaning efficiency.

More preferably, the aforementioned preset value is the first preset value, and during the dry cleaning process, when the vacuum and / or oxygen content in the dry cleaning machine is higher than the respective second preset value, the laundry is stopped. At least one operation, and evacuating the dry cleaning machine until the vacuum and / or oxygen content returns below the first preset value, wherein the second preset value is higher than the first preset value Set value. As a result, repeated switching of the vacuuming equipment can be avoided, thereby increasing the service life of the vacuuming equipment and the entire dry cleaning machine and reducing costs.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically illustrates a working principle diagram of a dry cleaning machine according to an embodiment of the present invention, wherein the dry cleaning machine is in a step of evacuating;

2 schematically illustrates a working principle diagram of a dry cleaning machine according to an embodiment of the present invention, in which the fan speed is increased, that is, the dry cleaning machine is in a high-speed high-speed circulation state;

3 is a schematic diagram illustrating a working principle of a dry cleaning machine according to an embodiment of the present invention, wherein the dry cleaning machine is in a washing step and a solvent is heated;

4 is a schematic diagram illustrating a working principle of a dry cleaning machine according to an embodiment of the present invention, in which the dry cleaning machine is in a drying step, and a solvent gas is recovered;

FIG. 5 is a schematic diagram illustrating an operation principle of a dry cleaning machine according to an embodiment of the present invention, in which a combustible gas and an oxygen content are detected;

6A schematically illustrates a perspective view of a dry cleaning cylinder of a dry cleaning machine according to an embodiment of the present invention;

6B schematically illustrates a front view of a dry cleaning drum of a dry cleaning machine according to an embodiment of the present invention;

6C schematically illustrates a cross-sectional view taken along line A-A of the dry cleaning drum of FIG. 6B;

FIG. 6D schematically illustrates a detailed view at C and D along the dry cleaning drum of FIG. 6C; and

FIG. 7 schematically illustrates a working principle diagram of a dry cleaning machine according to an embodiment of the present invention, wherein the dry cleaning machine is in a dehydration step.

In each of the above-mentioned FIGS. 1-5 and 7, an example of an actual working circuit in a corresponding state (for example, vacuuming, washing, dehydration, drying, etc.) is indicated by a thick dashed line, and Lines indicate parts and circuits that may not be in operation.

detailed description

The invention relates to a dry cleaning system, especially a large-scale dry cleaning system for industrial applications. In the sense of the present invention, the dry cleaning system does not involve the existing cleaning systems for dry cleaning metal materials. In particular, the dry-cleaning object of the dry-cleaning system or the dry-cleaning machine of the present invention mainly relates to clothing items such as, but not limited to, clothing, clothing materials (such as woven or non-woven materials, leather, wool, etc.), bedding (such as towels, Blankets, sheets, etc.), footwear, etc.

The dry cleaning system of the present invention includes at least a dry cleaning machine, such as a conventional dry cleaning device with a closed casing. However, the term "dry-cleaning system" of the present invention may include not only the dry-cleaning machine and the components inside the dry-cleaning machine, but also the other components that are physically located outside the dry-cleaning machine but will be used in the dry-cleaning process, such as described in detail below Various sensors, detectors / detectors introduced, etc. Of course, the scope of protection of the present invention will also cover the integration of these sensors, detectors / detectors directly into the inside of the dry cleaning machine (ie, physically located in the space of the housing of the dry cleaning machine).

In the present invention, the working process of dry cleaning can also include multiple steps like the existing dry cleaning machines, such as, but not limited to, a washing step (washing the object with a solvent), and a dehydration step (separating the solvent in the object with high centrifugal force) , Drying step (drying the object with hot air), deodorizing step (using air / gas, especially using frozen or unheated air / gas to cool the object), etc.

For example, as shown in FIG. 3, during the washing object, that is, the dry cleaning drum motor 15 is used to drive the dry cleaning drum back and forth, the solvent injection valve 9 (preferably located on the top of the dry cleaning drum 1) is opened, and the solvent is thereby removed by It is injected into the dry cleaning drum 1 and at the same time, the solvent discharge valve 14 is also opened, and the solvent (for example, a part of the solvent in the fluid passage) flowing out of the dry cleaning drum 1 can be discharged (to the pipeline of the pump 2). At this time, the outlet valve 8 of the storage tank is opened, and the solvent pump 2 is started, so that the solvent (discharged from the dry cleaning cylinder 1) is activated to withdraw the solvent from the storage tank (until the preset level of the solvent is reached), and continuously circulate Dry clean the objects in the drum 1 to effectively remove the dirt on the objects.

In the normal temperature washing program, the solvent discharge valve 14 is opened, and the solvent is extracted by the solvent pump 2 through the solvent heating bypass valve 31 or other bypass (which will be further described below in the heating washing program), and then flows to the solvent injection valve 9, After entering the dry-cleaning drum, it is again drawn out from the bottom solvent discharge valve 14 for circular washing.

The specific configuration of the dry cleaning drum 1 according to the present invention can be referred to, for example, FIGS. 6A-6D. Particularly advantageously, the dry-cleaning cylinder 1 of the dry-cleaning machine can be configured to be divided into a cylindrical inner tank and a cylindrical outer tank. In this configuration, the bladder is used to hold items, especially clothing (i.e., may be referred to as a clothes cage), and the dry cleaning drum motor 15 drives the bladder to rotate, while the outer bladder is kept stationary for A sealable chamber is provided therein.

However, it can also be understood that the dry-cleaning cartridge 1 of the dry-cleaning machine can also be arranged to consist of only one cartridge (ie, no outer bladder surrounding the inner bladder). In this case, a rotatable blade may be provided in the only dry cleaning drum to agitate the objects located in the drum so that the objects are exposed to as much as possible the solvent flowing through the dry cleaning drum.

In Fig. 6C, an exemplary mechanical structure of the inner liner 1a is schematically shown. A rear cylinder plate 2a is provided at the end of the liner 1a, and is mounted on the liner main shaft 3a by means of

bearings

5a and 6a shown in FIG. 6D. In order to ensure the formation of a closed space (to achieve a vacuum environment, which will be described in detail below), for example, a rear cylinder plate seal ring 4a and a liner seal ring 7a (a seal ring of the liner spindle 3a) are also shown in Figs. 6C-6D. . However, it can be understood that the entire dry cleaning system, especially the dry cleaning cylinder, can also contain more various types of sealing mechanisms (O-rings, labyrinth seals, etc.), for example, it can be arranged in the transition between the dry cleaning cylinder and the fluid channel. Office.

At the end of the washing process, the dry cleaning drum motor 15 still drives the dry cleaning drum 1 to reciprocate, but at this time, the solvent is no longer injected into the dry cleaning drum 1 through the solvent injection valve 9, and the solvent in the dry cleaning drum 1 is discharged out of the dry cleaning drum 1. And when the storage tank inlet valve 7 is activated, it gradually flows into the solvent storage tank or the distillation tank inlet valve 22 is activated and flows into the distillation tank 39 (as shown in FIG. 7). At this time, the solvent pump 2 is still in an operating state.

Then, in the dehydration step, the dry cleaning drum motor 15 is set to drive the dry cleaning drum 1 at a high speed to separate most of the solvent in the object by centrifugal force. With the aid of the solvent pump 2 and with the activation of the storage tank inlet valve 7 or the distillation tank inlet valve 22, the solvent (about 80% or more) separated from the object is gradually flowed into the storage tank or the distillation tank Within 39.

It can be understood that after the washing is completed and before the deliquoring step is started, the solvent injection valve 9 is closed, the solvent pump 2 is started, and the solvent discharge valve 14 is opened. Thus, most of the solvent in the dry-cleaning cartridge can be drawn out through the solvent pump 2 in advance. Therefore, the dry cleaning will reach the maximum speed after most of the solvent is discharged to ensure that the motor of the dry cleaning cylinder will not be overloaded.

After the above dehydration step, a drying step may be optionally added. In one example, the air inside the dry-cleaning cylinder may circulate through a fluid channel outside it (explained in detail below). In particular, components such as a fan, a condenser 4, a preheater 6, a heater 5, and the like are optionally arranged in the fluid passage. The fan 3 can be, for example, a fan with adjustable speed, especially a high-speed centrifugal fan.

In the process of air circulating through the dry cleaning cylinder 1 by means of a fan 3, especially a high-speed centrifugal fan, the preheater 6 and the heater 5 (or may include only a first-stage heating device, that is, only one heater) can be used to improve the entrance The temperature of the air in the dry-cleaning cylinder 1 allows the residual solvent in the object to be easily taken away when the hot air comes into contact with the object. At this time, the dry cleaning drum motor 15 still drives the dry cleaning drum 1 to reciprocate, so that different parts of the object can be exposed to the air flowing through it, thereby speeding up the drying process of each part of the object.

Preferably, the fluid channel may further include a condenser 4 located therein. When the hot air flowing through the dry-cleaning cylinder 1 passes through the condenser, the solvent in the air is separated from the air due to a significant drop in temperature. The dried air is reheated through the heater 5 and enters the dry cleaning drum 1. The separated solvent can flow into the solvent recovery tank 10.

The solvent recovery tank 10 may be connected to a solvent recovery tank discharge valve 12 located downstream thereof, to open the solvent recovery tank discharge valve 12 when, for example, the drying detection sensor 11 senses that the solvent in the solvent recovery tank approaches a preset volume. To drain the solvent (for this, it will be described further below).

After the drying is completed, the solvent on the objects in the dry cleaning drum is basically vaporized and condensed to recover. However, since the object is heated to a higher temperature during drying and there is still a high-temperature thin solvent gas in the dry cleaning drum at this time, it is necessary to have personnel cool out before removing the object.

To this end, a deodorizing step (ie, cold recovery) may be added after the drying step. At this time, the heater 5 and the preheater 6 are turned off, and the high-speed centrifugal fan 3 continues to work, and the air temperature no longer rises. The dry cleaning drum motor 15 still drives the dry cleaning drum 1 to reciprocate, so that different parts of the object can be exposed to the cold air / gas (i.e., frozen or unheated or frozen air / gas) flowing through it. , From reducing the temperature of the object, while taking away the evaporated solvent gas on the surface of the object.

These solvent gases can be passed through the condenser again (so that they can be recycled) and the heaters and preheaters (if any) that have been turned off. This procedure is repeated until the temperature at the outlet of the fluid channel drops to a set threshold.

In the present invention, the dry cleaning machine may use various solvents to wash the articles. In particular, the dry-cleaning machine of the present invention can use a solvent having a low dissolving power KB value, a high boiling point, and a low flash point, and this type of solvent can fully meet the current requirements or regulations for environmental protection. Such a solvent may be, for example, a hydrocarbon solvent, but is not limited thereto. In the following, hydrocarbon systems are used as examples to describe in detail the various system structures of the washer.

In the case of the dry-cleaning machine according to the present invention, the temperature of the solvent can be appropriately increased when washing the objects, so that the activity of the solvent molecules is significantly enhanced, so that the actual KB value of the solvent is increased, and the decontamination of the specific solvent type is sufficiently improved. ability.

As previously described in the background art, if the temperature of the solvent is to be increased, there may be a risk of being in the explosive range due to the lower flash point of the solvent. For example, for hydrocarbon solvents, the flash point is 45 to 65 degrees Celsius, and the lowest explosion limit is 0.6% and the highest limit is 7%. Therefore, after the solvent is heated and gasified and mixed with air, if the volume proportion falls within the explosion Within the limit, it is easy to be ignited by static electricity.

For this reason, the dry cleaning machine of the present invention can be maintained in a negative pressure state. In particular, the inside of the dry-cleaning cylinder of the dry-cleaning machine is under a negative pressure. Preferably, each part of the dry cleaning machine that is isolated from the outside air, including the dry cleaning drum, the solvent circulation circuit, the air circulation circuit, etc., should be maintained at a negative pressure state.

According to the present invention, the dry cleaning machine may include a vacuum pumping device that is selectively in fluid communication with the dry cleaning drum to achieve and maintain the vacuum and / or oxygen content in the dry cleaning machine, especially in the dry cleaning drum. Below the preset value. Similarly, at least a part of the evacuation device (for example, a vacuum pump, etc.) may not necessarily be located in the housing of the dry cleaning machine, but may be within the entire dry cleaning system.

Advantageously, the preset values of the degree of vacuum and / or oxygen content can be determined by the specific type of solvent used, that is, different preset values can be set for different solvents (e.g., can be made based on experiments or experience) Query in the table), this is mainly because the flash point and boiling point of different solvents are different, and the required vacuum is also different.

Advantageously, the respective preset values of the vacuum degree and / or the oxygen content can also be automatically adjusted and adjusted according to the current dry cleaning status (using a feedback control loop or other sensors for monitoring other environmental factors). However, it is also conceivable to set the preset value to a fixed value, for example, the fixed value is low (that is, the degree of vacuum is large, and the oxygen content is low), so as to be able to cope with a variety of different solvents in general. Dangerous situation.

In the present invention, but in order to avoid ambiguity, the term "degree of vacuum" may be defined as the actual pressure value (not the degree of vacuum). For example, the preset value of the degree of vacuum may be, for example, -600 mbar. In other words, a vacuum level lower than, for example, -600 mbar means that the air pressure is further away from zero pressure, such as -800 mbar, and a vacuum level higher than, for example, -600 mbar means that the air pressure is closer to zero, or even greater than zero. (That is, positive pressure). More specifically, the degree of vacuum is lower than a preset value that is generally less than zero, and thus is farther from the zero value of air pressure (that is, the degree of vacuum is greater) than the preset value.

The preset value of the oxygen content is generally a positive value, especially a value expressed as a percentage. The oxygen content can be set according to the flammability point of different solvents. However, it should also be noted that there is generally an explosive range or concentration range for the oxygen content, which includes an upper limit value and a lower limit value. For safety reasons, the oxygen content within the meaning of the present invention needs to fall below the lower limit value, that is, the preset value of the oxygen content is the lower limit value, for example, the oxygen content should be lower than 11% -15% (according to the solvent or other factors) Can vary).

In order to detect the vacuum degree and / or the oxygen content in the dry cleaning machine, a vacuum degree sensor 21 and / or an oxygen content detector 24 may be respectively provided. These sensors or detectors may be arranged at appropriate positions inside the dry cleaning system, especially the inside of the dry cleaning machine, as described above, but they may also be located outside the housing of the dry cleaning machine, or they may alternatively be shared by multiple dry cleaning machines. . In other words, the dry cleaning system can include all kinds of sensors and detectors, but the specific location can be determined according to the actual production situation.

As shown in FIGS. 1-5, the vacuum degree sensor 21 may be advantageously arranged to measure the degree of vacuum inside the dry cleaning machine, especially at the fluid inlet 16 of the dry cleaning cylinder 1. The oxygen content detector 24 may, for example, be arranged further downstream of the vacuum equipment to detect the oxygen content in the dry cleaning machine. However, it can be understood that in the case where the vacuum sensor 21 and the oxygen content detector 24 are integrated in a dry cleaning machine, their specific positions can be changed according to requirements, and are not limited to the examples shown in FIGS. 1-5 position.

It is worth noting that the vacuum degree and oxygen content in the dry cleaning system, especially the dry cleaning cylinder, can only detect one of them, but can also detect both. When detecting one of them, such as the degree of vacuum, the control device may also convert the current oxygen content based on the current degree of vacuum. The accuracy of the oxygen content obtained in this way, although not as high as directly measured, also meets the requirements for monitoring dry cleaning systems. Conversely, when monitoring, for example, the oxygen content, the control device can also convert the current vacuum degree based on the current oxygen content. Although the accuracy of the vacuum obtained in this way is not as high as that measured directly, it also meets the requirements of monitoring dry cleaning systems.

In a better embodiment, the preset value of the vacuum degree or the oxygen content can also be set to the following value: As long as one of the vacuum degree or the oxygen content is satisfied, the conversion (even a safety margin can be added) Degree) can ensure that the undetected one of the vacuum degree or the oxygen content is also satisfied, thereby simplifying the entire detection and control process.

When both the vacuum sensor and the oxygen content detector are integrated in the dry cleaning system, they can be arranged in series or in parallel according to the needs. In addition, even in the case where both are integrated in the dry cleaning system, it is possible to read only the information of one of them instead of reading the information of both. For example, the vacuum sensor can continuously detect the vacuum in the dry cleaning system throughout the dry cleaning process.

Alternatively, the dry-cleaning system or the dry-cleaning machine according to the invention can also detect the content of flammable gases in the dry-cleaning machine, for example by means of a flammable-gas content detector 27. Monitoring of flammable gas content is optional to meet additional requirements in some countries or regions. Likewise, the combustible gas content detector 27 may be located at a suitable location inside the dry cleaning machine or outside the dry cleaning machine (but still inside the dry cleaning system).

The purpose of setting a flammable gas content detector is to adjust the time for drying objects. More specifically, when the flammable gas content detector is not below its preset value, this indicates that the solvent content in the object is still high, and then the object is continued to be dried (for example, the preset drying temperature has been exceeded). After drying time), to further reduce the solvent content in the object below the preset value.

In addition, advantageously, the combustible gas content detector 27 can provide data on the percentage of combustible gas in the air in the dry-cleaning drum, which can be used for reference data of other sensors in addition to monitoring the gas concentration.

For the convenience of control, it is also conceivable to detect the flammable gas content by means of a flammable gas content detector after a preset drying time, and then set a period of time for drying, and then detect the flammable gas again after the period of time is over. Content, and so on. In a better embodiment, the combustible gas content detected after a preset drying time can also be compared with a pre-stored table or other experience value in the controller to set a more accurate subsequent drying Dry time.

In order to activate the dry cleaning machine based on the data obtained by the sensors, advantageously, the dry cleaning system according to the present invention may include a control device 40 (see, for example, FIG. 1), which is not limited to being located inside the housing of the dry cleaning machine, Instead, it can be outside the dry cleaning machine. The control device can be a controller or any component that implements a control function. The control device according to the present invention can receive signals, send out signals, control the activation and deactivation of related components of the dry cleaning machine (for example, the motor of the dry cleaning barrel, various valves), and the like (for details, see the description below).

As mentioned above, the entire dry cleaning cycle may include different phases, such as a washing phase, a dehydration phase, a drying phase, a deodorizing phase, and the like. The dry-cleaning machine of the present invention starts at least one operation on an object when its vacuum degree and / or oxygen content are respectively below respective preset values. The at least one operation may be, for example, one or more of the operations listed above for washing, deliquoring, drying, and deodorizing. In particular, the present invention can also perform only one kind of operation on the object, for example, only when washing the object with a solvent, it is necessary to ensure the vacuum and / or oxygen content in the dry cleaning machine, and it is not necessary to ensure the vacuum and / Or oxygen content. In other words, the need for a vacuum and / or oxygen content below a preset value may be for only one operation, or multiple operations, or the entire dry cleaning process.

It can be understood that the term "at least one operation" includes washing the object with a solvent and / or air-drying the object with airflow, and the term "air-drying the object with airflow" herein can include drying with hot air and cooling with cold air. Air deodorizes both. It can be understood that the sequence of the above operations is not strictly required to be performed sequentially, that is, the dry cleaning system can still return to the dehydration step, instead of only performing the drying step and deodorizing step after dehydration.

The control device 40 as described above may be configured to actuate the dry cleaning machine when the vacuum degree sensor 21 and the oxygen content detector 24 detect that the vacuum degree and / or the oxygen content are respectively below respective preset values, so as to At least one of the above operations on the object is initiated.

Specifically, the control device 40 may receive data on the vacuum degree and / or the oxygen content from the vacuum degree sensor 21 and the oxygen content sensor 24, and then use these data with a preset value by using, for example, a comparison module in the control device 40 Compare and send instructions to activate the dry cleaning machine when the vacuum and / or oxygen content are below their respective preset values to start one or more of the operations of washing, dehydration, drying, deodorization, etc. . More preferably, the control device 40 may further include a correction module to correct the preset value according to the current environmental conditions (the control device 40 may be connected with other sensors), thereby more conducive to reducing the power of the entire dry cleaning machine (operation) cost.

In addition, it can also be understood that at different stages of the dry cleaning cycle, the preset value, especially the preset value of the vacuum degree may also be different. For example, the absolute value of the preset value in the washing phase may be greater than the absolute value of the preset value in the drying phase.

It is particularly preferred that after starting the at least one operation of the dry cleaning machine on the object, that is, while the dry cleaning machine is in the above at least one operation of the object, if the vacuum and / or oxygen content in the dry cleaning machine is When the gradual rise is started, the at least one operation process needs to be stopped and the dry cleaning machine is evacuated until it returns to the preset value again.

For example, after the solvent in the dry cleaning cylinder is heated, some gas may be generated due to expansion, which will cause the pressure in the dry cleaning cylinder to increase, that is, the vacuum value may become higher than a preset value. However, according to the present invention, the vacuum degree sensor can keep detecting the vacuum degree in the dry cleaning system, and then control the operation of the vacuum pump, so as to extract the extra generated gas to maintain the vacuum degree in the dry cleaning cylinder.

According to the present invention, the preset value for stopping the at least one operation may be the same value as the preset value for activating the at least one operation, but more preferably the two are different values. For this reason, a preset value for activating at least one operation may be referred to as a “first preset value”, and a preset value for stopping the at least one operation may be referred to as a “second preset value” "Set value", where "first" and "second" do not indicate the order or importance, but rather indicate two independent preset values (even if the two can be the same or similar in value).

Generally, for the oxygen content, the preset value for stopping the at least one operation may be the same value as the preset value for activating the at least one operation, but for the degree of vacuum, The preset value for stopping the at least one operation may preferably be higher than the preset value for activating at least one operation (i.e., closer to zero pressure, but still under negative pressure, It is a negative pressure value), for example, another preset value for the vacuum degree in the dry cleaning machine for stopping the at least one operation may be preferably slightly lower than 0 bar.

Since the second preset value for stopping the at least one operation is different from the first preset value for activating the at least one operation, it can be advantageously avoided due to the vacuum and / or oxygen content in the dry cleaning machine Failure to reach the preset value results in repeated switching of the vacuuming equipment, that is, starting / deactivating in a short time, thereby increasing the service life of the vacuuming equipment and the entire dry cleaning machine. In addition, since the degree of vacuum only needs to be maintained at a negative pressure after starting the various stages of dry cleaning, rather than being too low, it can further save energy and reduce costs (for example, reduce electricity costs).

As shown schematically in Figure 1, when the normal dry cleaning cycle is started, the dry cleaning cylinder is first evacuated until the vacuum degree of the dry cleaning cylinder reaches the (first) preset value (for example, -600 millimeters, -900 Millibar, etc.) before the normal dry cleaning cycle is started.

As an example, the evacuation device may include one or more of an evacuation valve, a vacuum pump, and an optional air filter. Before starting to wash the objects, after putting the objects in the dry cleaning drum 1, the vacuum valve 17 can be opened and the vacuum pump 19 can be started to draw out the air in the dry cleaning drum 1, thereby reducing the air pressure in the dry cleaning drum 1. . To protect the environment, the extracted air can optionally be discharged from the dry cleaning machine via an air filter 18.

During the washing process, if the degree of vacuum in the dry-cleaning machine is higher than or equal to a preset value, especially the second preset value as described above, the washing process needs to be stopped and the vacuum pumped again. At this time, the evacuation valve 17 can be opened and the vacuum pump 19 can be started. When the degree of vacuum in the dry-cleaning machine is lower than the second preset value, the vacuum valve 17 and the vacuum pump 19 are closed again.

In addition, the dry cleaning machine according to the present invention may further include a fluid passage. In the present invention, the term “fluid channel” mainly refers to an air duct for air circulating through the dry cleaning drum 1, but the fluid channel may also advantageously constitute at least a part of a circuit for solvent circulation.

As shown by way of example in Figs. 1-5, the inside of the dry-cleaning cartridge 1 may be via its fluid outlet (shown at the bottom right of the dry-cleaning cartridge 1 in the figure) and a fluid inlet 16 (shown at the upper-left of the dry-cleaning cartridge 1 in the figure ) Are connected in fluid communication with the fluid channels, respectively, so that the dry cleaning cylinder 1 and the fluid channel can form a circuit, in particular, a hermetically sealed circuit that is spaced apart from the external environment. The circuit can be configured to circulate the gas through the dry cleaning cylinder 1.

Preferably, the evacuation device, in particular the evacuation valve, may be arranged to selectively access the fluid passage in the closable above-mentioned circuit so as to be able to evacuate from the fluid passage and thus from the dry cleaning drum 1 so that the dry cleaning machine At least one of the degree of vacuum and the content of oxygen in the interior has reached a preset value or less.

During the washing and deliquoring process, the solvent in the dry cleaning cylinder 1 can also flow out of the dry cleaning cylinder 1 from the fluid outlet of the dry cleaning cylinder 1 and enter the fluid channel, as shown in FIG. 3. As described above, from this fluid channel, the solvent can be circulated to the solvent injection port 9 via the pipeline through the solvent discharge valve 14 for circulation, or flowed into the solvent storage container or distillation tank 39 via the pipeline.

During the drying or deodorizing process, the air in the dry cleaning cylinder 1 flows out of the dry cleaning cylinder 1 from the fluid outlet of the dry cleaning cylinder 1 and enters the fluid channel, and then re-enters the dry cleaning cylinder 1 through the fluid inlet 16 of the dry cleaning cylinder 1. , Thus forming a circulating airflow, as shown in FIGS. 2 and 4.

According to the present invention, the object is dried in the dry-cleaning cylinder 1 at least under the negative pressure (that is, the solvent in the object is vaporized and then recovered). Therefore, the boiling point of the solvent is correspondingly reduced, so the solvent vaporization speed is increased. Therefore, at the same or lower drying temperature, the solvent recovery speed in the object will be faster.

In a preferred embodiment, the fluid inlet 16 of the dry-cleaning cartridge 1 is closable, that is, the fluid channel and the dry-cleaning cartridge 1 can be disconnected from each other at or near the fluid inlet. For example, as shown in FIG. 1, when the dry-cleaning machine is evacuated, the fluid inlet 16 of the dry-cleaning cylinder 1 may be closed by means of a blocking member or other mechanical structure.

It is particularly advantageous that the evacuation device can be inserted into the fluid channel adjacent to the fluid inlet 16. As a result, when the fluid inlet 16 is closed, the air in the dry-cleaning cylinder 1 is evacuated by the vacuum equipment through its fluid outlet and fluid channel.

In particular, in the case where the condenser 4 is provided in the fluid passage, the solvent in the air will be separated from the air due to the significant decrease in the temperature when the air flowing through the dry cleaning cylinder 1 passes the condenser 4, and the vacuum equipment is arranged. It is very advantageous downstream of the condenser 4, especially closer to the fluid inlet 16, because the condenser 4 can be used to further remove a part of the solvent in the air, so that little or even Almost no solvent will be pumped out of the dry cleaning machine through the vacuum equipment, which will cause a certain degree of adverse impact on the environment and increase the loss of solvent.

It can be noted that, despite being connected to various valves, the entire interior of the dry cleaning machine, especially the dry cleaning cylinder 1 and the fluid passage, can be completely closed. In order to ensure the tightness, it is conceivable to provide a sealing device at the channel and the interface, as shown schematically in FIG. 6D.

Since the inside of the dry cleaning machine is at least under a negative pressure state, in order to effectively improve the decontamination ability of the solvent, the temperature of the solvent can be increased according to the present invention without worrying about whether there is an explosion risk.

To increase the temperature of the solvent, as shown in FIG. 3, a solvent heater 37 is provided on the solvent circulation line. The solvent heater 37 should be arranged at an appropriate position on the solvent circulation pipeline, especially downstream of the solvent discharge valve 14, and in particular, it should be spaced a certain distance from the aforementioned fluid passage.

When the solvent flows through the solvent heater 37, the temperature of the solvent is increased to achieve a sufficient detergency dissolving power (i.e., increasing the KB value). In order to make this heating of the solvent selective, the solvent heater 37 is also provided with a bypass line so that the solvent flows through the bypass line when heating is not needed, so that it does not flow through the Solvent heater 37.

In this regard, a bypass valve 31 is also provided on the bypass line. When the bypass valve 31 is closed, the solvent flows through the solvent heater inlet valve 30 and enters the solvent heater 37 and is heated. When the solvent heater inlet valve 30 is not closed and the bypass valve 31 is opened (for example, when the vacuum and / or oxygen content is not below the preset value), the solvent is bypassed by the bypass heating器 37。 37.

In an advantageous embodiment, the solvent heater 37 optionally includes a solvent heater thermal fluid flow valve 32 and the hot fluid can be accessed via the solvent heater thermal fluid flow valve 32. More advantageously, a solvent temperature sensor 29 is provided at the outlet of the solvent heater 37. However, the present invention also contemplates other equipment configurations for achieving solvent heating.

During the washing process, when the solvent temperature sensor 29 detects that the temperature of the solvent is lower than a preset threshold (ie, the set temperature), the solvent heater fluid valve 28 is opened, and the hot fluid is adjusted by the hot fluid flow valve 32 Thereafter, it is allowed to enter the solvent heater 37 to perform heat exchange with the solvent flowing through the solvent heater 37, thereby increasing the temperature of the solvent. During the washing process, when the solvent temperature sensor 29 senses that the solvent temperature is equal to or higher than a preset threshold, the solvent heater fluid valve 28 is closed.

Although the above describes the example in which the solvent can be heated to increase the KB value when the vacuum and / or oxygen content is below a preset value, it can also be understood that a normal temperature washing program can also be performed in this case or according to the actual situation Heat washing procedures are required or on-site conditions (eg, depending on whether the dry cleaning site is power limited). These alternatives are all within the protection scope of the present invention.

Next, when the dry cleaning machine performs the drying step, as shown in FIG. 4, the solvent outlet of the condenser arranged in the fluid passage can be connected with the solvent recovery tank inlet shutoff valve 35, the vacuum breaking valve 34, the solvent recovery tank 10, A solvent recovery tank discharge valve 12 and an optional oil-water separator 13 are connected.

Specifically, in the drying step, the solvent recovery tank discharge valve 12 is closed, the vacuum destruction valve 34 is closed, and the solvent recovery tank inlet shutoff valve 35 is opened. When the drying detection sensor 11 detects that a certain volume of solvent is present in the solvent recovery tank 10, after the solvent recovery tank inlet shutoff valve 35 is closed, the vacuum destruction valve 34 is opened, and the solvent recovery tank discharge valve 12 is opened to discharge the solvent. However, since the solvent recovery tank inlet shut-off valve 35 remains closed, the vacuum and / or oxygen content in the dry cleaning cylinder 1 and its fluid channel remains unchanged (that is, the dry cleaning system or the dry cleaning machine is always in a vacuum state) No need to worry about vacuum leak due to solvent discharge.

After a period of time, the solvent is drained (for example, until the drying detection sensor 11 cannot detect the solvent), the solvent recovery tank discharge valve 12 is closed again, the solvent recovery tank vacuum destruction valve 34 is closed, and the solvent recovery tank inlet shut-off valve 35 is closed again. turn on.

In addition, an oil-water separator 13 may be connected after the solvent recovery tank discharge valve 12 to further protect the environment from pollution.

In addition, according to the requirements of various regions, a combustible gas content detector 27 may be added after the drying detection sensor 11 detects the combustible gas content. In other words, when dry hot air is blown from the surface of the object, the solvent gas evaporated by the hot air is taken away, and it does not enter the next step until it is detected by the dry detection sensor 11 or the combustible gas content detector (described in detail below).

As shown in FIG. 2, during the drying step of drying the object with hot air or the deodorizing step of drying the object with (cold) air, the fan 3, such as a high-speed centrifugal fan, especially an adjustable-speed high-speed centrifugal fan The fluid passage can be connected so that the air circulates through the dry cleaning drum 1 so that the amount of solvent remaining on the object can be increased by hot air during drying or cold air during deodorization.

After all the dry cleaning steps are completed (for example, you can press and hold the "Stop" button for about 5 seconds at this time), the main vacuum breaking valve 20 can be used to draw ambient air into the dry cleaning machine, thereby quickly destroying the negative pressure to the same as atmospheric pressure . This is set so that when the clothes door is opened, it will not be difficult to open due to negative pressure.

In addition, as shown in FIG. 5, during the dry cleaning process, particularly during the washing process, the oxygen content detection gas valve 23 is opened, which is connected to the oxygen content detector 24. After the oxygen content detector 24 and the vacuum sensor 21 reach the set value, the solvent is allowed to circulate through the heating system until it reaches the set temperature. When the oxygen content exceeds a set threshold, the oxygen content detector 24 may trigger an alarm display (audible and / or visual alarm). As shown in FIGS. 1-5, the oxygen content detecting gas valve 23 may be connected downstream of the vacuum pump 19, and an air filter 39 is included therebetween.

In addition, the dry cleaning machine according to the present invention may optionally include a combustible gas content detector 27. During the drying process, the combustible gas content detection gas valve 26 is opened and connected to the combustible gas content detector 27. Preferably, after the combustible gas content detector 27 detects that the combustible gas content in the gas is lower than a preset value, it indicates that the object is dried.

The dry-cleaning machine of the present invention can be applied to a dry-cleaning process using a solvent having a high boiling point and a low solubility such as a hydrocarbon solvent, and the dry-cleaning machine of the present invention is generally suitable for dry-cleaning clothes or materials, such as leather, fur (for example Not limited to mink, fox, sheepskin, pigskin, cowhide, etc.), polyester wool, polyester cotton, cotton, cotton, linen, linen, silk (such as but not limited to silk, feather yarn, etc.), wool, rabbit hair , Acetate fiber and dyed clothing (because the dye is easily decomposed when washed) and other materials that are not suitable for washing with water, especially for heavy oil and fat materials and materials that are sensitive to heat. As an example, the following features of the dry cleaning machine of the present invention can be used for washing fur materials, for example. It is known that fur has a physical property that cannot withstand high temperatures and is expensive. Therefore, dry cleaning of fur has many restrictions and high requirements.

First, the dry cleaning machine of the present invention can use a solvent heating device to raise the temperature of the solvent without any problem. Due to the high oil content of fur raw materials, if it is washed with a normal temperature hydrocarbon solvent, the low dissolving power makes the washing time very long. After the solvent is heated up, the solvent's dissolving power increases, which can accelerate the decomposition and emulsification of the fat in the leather board, and shorten the washing time (also suitable for degreasing and cleaning other materials such as fur raw materials).

Secondly, the fur material or clothing will affect its appearance and its value because the fur of the fur will bend and deform when the temperature exceeds 65 degrees Celsius. However, with the negative pressure drying system of the present invention (that is, the drying process is ensured to be at least under negative pressure), the boiling point of the solvent can be reduced in the case of negative pressure drying, so that the fur can be quickly dried at a lower temperature (recovery Fur raw materials / solvents in clothing) (It is also especially suitable for other materials such as wool and leather).

Thirdly, with the dry-cleaning machine of the present invention, the solvent utilization rate is particularly high. This is because the whole process from the moment the object is placed in the dry-cleaning drum to the completion of cleaning, dehydration, drying, and deodorization is performed in full Perform in a sealed space. Because the inside of the dry cleaning machine is always maintained under a negative pressure, the solvent volatilized from the objects during drying or deodorizing operations can only be recovered in the system without leaking out of the dry cleaning machine.

Based on at least the above-mentioned multiple technical advantages, compared with the prior art dry-cleaning machines, the dry-cleaning system according to the present invention can reduce energy, shorten dry-cleaning time, especially time for washing and drying, thereby saving costs and being beneficial to the environment protection.

The foregoing description has given many features and advantages, including various alternative embodiments, and details of the structure and function of the apparatus and method. The intentions herein are exemplary and not exhaustive or limiting.

It will be apparent to those skilled in the art that various modifications can be made to the full range indicated by the broad upper meaning of the terms expressed in the appended claims, particularly in terms of structure, materials, elements, parts, shapes, The dimensions and arrangement of components, including combinations of these aspects within the scope of the principles described herein. To the extent that these various modifications do not depart from the spirit and scope of the appended claims, they are meant to be included therein.

List of reference signs:

1 dry cleaner

1a liner

2 Solvent pump

2a rear cylinder plate

3 fans

3a inner spindle

4 condenser

4a / 7a sealing ring

5 heater

6 preheater

5a / 6a bearing

7 reservoir inlet valve

8 tank outlet valve

9 Solvent injection valve

10 solvent recovery tank

11 drying detection sensor

12 Solvent recovery tank discharge valve

13 oil-water separator

14 Solvent discharge valve

15 Dry cleaning drum motor

16 fluid inlet

17 vacuum pump

18 air filter

19 vacuum pump

20 main vacuum breaking valve

21 vacuum sensor

22 Distillation tank inlet valve

23 oxygen content detection air valve

24 oxygen content detector

26 Combustible gas content detection gas valve

27 Combustible gas content detector

28 Solvent heater fluid valve

29 solvent temperature sensor

30 Solvent heater inlet valve

31 bypass valve

32 Solvent heater hot fluid flow valve

34 vacuum breaking valve

35 Solvent recovery tank inlet shut-off valve

36 fan governor

37 Solvent heater

38 air filter

39 distillation box

40 control devices.

Claims

A dry cleaning system including:

A dry cleaning machine comprising a dry cleaning drum (1), a solvent for dry cleaning can be injected into the dry cleaning drum to wash objects contained in the dry cleaning drum,

It is characterized in that the dry cleaning system further comprises:

An evacuation device (17, 18, 19), which can be connected in fluid communication with the dry cleaning cylinder (1);

A vacuum degree sensor (21), configured to sense a vacuum degree in the dry cleaning machine;

A control device (40) configured to be communicatively connected with the vacuum sensor (21);

Wherein, the evacuation device (17, 18, 19) can be activated to establish and maintain a negative pressure in the dry cleaning machine, and the control device (40) is configured to detect by the vacuum sensor (21) When the vacuum level is below its preset value, the dry cleaning machine is activated to initiate at least one operation on the object.
A dry cleaning system including:

A dry cleaning machine comprising a dry cleaning drum (1), a solvent for dry cleaning can be injected into the dry cleaning drum to wash objects contained in the dry cleaning drum,

It is characterized in that the dry cleaning system further comprises:

An evacuation device (17, 18, 19), which can be connected in fluid communication with the dry cleaning cylinder (1);

An oxygen content detector (24) for detecting the oxygen content in the dry cleaning machine;

A control device (40) configured to be communicatively connected with the oxygen content detector (24);

Wherein, the evacuation device (17, 18, 19) can be actuated to establish and maintain a negative pressure in the dry cleaning machine, and the control device (40) is configured in the oxygen content detector (24) When the oxygen content is detected to be below its preset value, the dry cleaning machine is activated to initiate at least one operation on the object.
The dry cleaning system according to claim 1 or 2, characterized in that the control device (40) is configured to enable the washing of the objects with a solvent and / or the use of an air flow when the dry cleaning machine is activated. Objects are air-dried.
The dry-cleaning system according to claim 3, wherein the dry-cleaning machine further comprises a fluid channel, and the dry-cleaning cylinder (1) is in fluid communication with the fluid channel via its fluid outlet and fluid inlet, respectively, so that The dry cleaning cylinder (1) and the fluid channel can form a circuit, and the circuit is configured to circulate gas through the dry cleaning cylinder (1).
The dry cleaning system according to claim 4, characterized in that said vacuuming device (17, 18, 19) is arranged to selectively access said fluid channel in said closable circuit so as to be able to be accessed from The fluid channel and thus the vacuum is evacuated from the dry cleaning drum (1).
The dry cleaning system according to claim 1 or 2, wherein the dry cleaning machine further comprises a solvent heating device, and the solvent heating device is configured so that a degree of vacuum in the dry cleaning cylinder (1) is at the preset value. When the value is less than a predetermined value, the solvent injected into the dry cleaning drum (1) can be heated.
The dry cleaning system according to claim 6, wherein the solvent heating device is configured to monitor the temperature of the solvent flowing through it, so that the solvent heating device stops the solvent heating after the solvent reaches a set temperature. The solvent is heated.
The dry-cleaning system according to claim 4, wherein the dry-cleaning machine includes a solvent gas recovery device, and the solvent gas recovery device includes a condenser (4) arranged in the fluid channel so that The solvent can be separated from the air of the condenser (4).
The dry cleaning system according to claim 8, characterized in that said vacuuming device (17, 18, 19) is arranged to access said downstream of said condenser (4) in said fluid channel Fluid channel.
The dry cleaning system according to claim 1 or 2, further comprising a combustible gas content detector (27) for detecting a combustible gas content in the dry cleaning cylinder (1), the combustible gas content detector In communication with the control device (40), during the drying process of the object, the control device (40) is configured to stop the drying process of the object until the flammable gas content is below its preset value.
The dry-cleaning system according to claim 4, characterized in that the dry-cleaning machine further comprises an adjustable-speed fan (3) capable of accessing the fluid channel, so that the gas in the dry-cleaning cylinder (1) circulates through the dry-circulation gas. Fluid channel.
The dry cleaning system according to claim 4, characterized in that the dry cleaning machine further comprises a vacuum breaking valve (20), the vacuum breaking valve can be selectively connected to the fluid channel so as to be able to be accessed from the outside of the dry cleaning machine Air is sucked in to destroy the negative pressure in the dry cleaning machine.
The dry cleaning system according to claim 1, further comprising an oxygen content detector for detecting the oxygen content in the dry cleaning machine, and the control device (40) is configured to communicate with the oxygen content detector. (24) A communication connection, wherein the control device (40) is configured to detect the degree of vacuum at the vacuum sensor (21) and the oxygen content detected by the oxygen content detector (24), respectively When it is below its preset value, the dry cleaning machine is activated to initiate at least one operation on the object.
The dry cleaning system according to claim 2, further comprising a vacuum sensor (21) for detecting a vacuum degree in the dry cleaning machine, and the control device (40) is configured to communicate with the vacuum degree. A sensor (21) is communicatively connected, wherein the control device (40) is configured to detect the degree of vacuum at the vacuum sensor (21) and the oxygen content detected by the oxygen content detector (24) The dry cleaning machines are activated when they are respectively below their preset values to initiate at least one operation on the object.
A dry cleaning machine including:

Dry cleaning drum (1), a solvent for dry cleaning can be injected into the dry cleaning drum to wash the objects contained in the dry cleaning drum,

It is characterized in that the dry cleaning machine further comprises:

An evacuation device (17, 18, 19), which can be connected in fluid communication with the dry cleaning cylinder (1), wherein the evacuation device (17, 18, 19) can be actuated to A negative pressure is established and maintained in the dry cleaning machine, and when the vacuum and / or oxygen content in the dry cleaning machine is below its preset value, the dry cleaning machine is activated to activate at least one of the items operating.
A method for dry cleaning with a dry cleaning system, comprising:

Injecting a solvent for dry cleaning into a dry cleaning drum (1) of a dry cleaning machine in the dry cleaning system to wash objects contained in the dry cleaning drum,

It is characterized in that the method further comprises:

A negative pressure is established and maintained in the dry cleaning machine by evacuating, wherein when the vacuum and / or oxygen content in the dry cleaning machine is below its preset value, the dry cleaning machine is activated to start At least one operation of the object.
The method according to claim 16, characterized in that the preset values of the degree of vacuum and / or the oxygen content in the dry-cleaning cylinder (1) are determined by the type of the solvent.
The method according to claim 17, characterized in that, when the degree of vacuum in the dry cleaning machine is below a preset value, the solvent injected into the dry cleaning drum (1) is selectively heated to Increase the solvent power of the solvent.
The method according to claim 17, further comprising detecting a flammable gas content in the dry cleaning drum (1), wherein, during the drying process of the object, the flammable gas content is at a preset value thereof. The object drying process is stopped below.
The method according to claim 17, wherein the preset value is a first preset value, and during the dry cleaning process, when the vacuum degree and / or the oxygen content in the dry cleaning machine is When above the respective second preset value, the at least one operation on the object is stopped, and the dry cleaning machine is evacuated until the degree of vacuum and / or the oxygen content returns to the The at least one operation is continued below the first preset value, wherein the second preset value is higher than the first preset value.