Clothes dryer

Abstract

The application belongs to the technical field of household appliances, and particularly relates to a clothes drying machine. The clothes drying machine comprises a volute, a fan and a drying barrel. The volute is provided with an air inlet, a containing cavity and an air outlet section. The air outlet section of the volute is provided with an air outlet. The fan is arranged in the containing cavity of the volute. The air outlet of the volute and an axial one end of the drying barrel are communicated. The air inlet of the volute and an axial other end of the drying barrel are communicated through an air duct to form a circulating air path. A relief hole is arranged on a positive pressure section of the circulating air path. The application can reduce the barrel pressure in the drying barrel of the clothes drying machine, greatly reduce the leakage of the dynamic seal at both ends of the drying barrel of the clothes drying machine, improve the sealing effect between the hot air circulating system and the drying barrel of the clothes drying machine, and improve the drying effect of the clothes drying machine and the user experience.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, and particularly relates to a clothes dryer. BACKGROUND

[0002] The clothes dryer blows the hot air into the clothes dryer drum through the use of the circulating hot air, and the water vapor evaporated from the clothes is condensed into water by the condenser, and then discharged from the machine. The water vapor removed of the moisture is heated again and then introduced into the clothes dryer drum. Such circulation forms the hot air circulation system of the clothes dryer.

[0003] To accelerate the clothes drying speed and improve the clothes drying uniformity, and to avoid that the hot air only carries out the moisture of the surface clothes, it is usually required that the clothes dryer drum rotates at a certain speed to tumble the clothes, so as to achieve the purpose of fast and uniform clothes drying. Since the clothes dryer drum and the air duct system move relatively, it is required that a sealing device is arranged between the hot air circulation system of the clothes dryer and the clothes dryer drum to reduce the leakage of the circulating hot air as much as possible.

[0004] The sealing device in the prior art has assembly errors, and the sealing effect between the hot air circulation system of the clothes dryer and the clothes dryer drum is poor after long-time use, which affects the clothes drying effect of the clothes dryer and affects the user experience. SUMMARY

[0005] To solve the above technical problems, the present application provides a clothes dryer, which aims to at least partly solve the technical problems that the sealing effect between the hot air circulation system of the clothes dryer and the clothes dryer drum is poor in the prior art, which affects the clothes drying effect of the clothes dryer and affects the user experience.

[0006] The technical scheme of the present application is as follows:

[0007] The present application provides a clothes dryer, which is characterized in that the clothes dryer comprises:

[0008] A volute is provided with an air inlet, a containing cavity and an air outlet section, and the air outlet section is provided with an air outlet;

[0009] A fan is arranged in the containing cavity of the volute;

[0010] A clothes dryer drum, the air outlet of the volute and one axial end of the clothes dryer drum are communicated, the air inlet of the volute and the other axial end of the clothes dryer drum are communicated through an air duct to form a circulating air path, and a pressure relief hole is arranged on the positive pressure section of the circulating air path.

[0011] In some embodiments, a filter screen is arranged in the air duct, and the circulating air path between the outlet of the fan and the filter screen along the airflow direction in the circulating air path is the positive pressure section of the circulating air path.

[0012] In some embodiments, the pressure relief hole is provided with one or more.

[0013] In some embodiments, the area of the pressure relief hole is 20-1500mm 2 .

[0014] In some embodiments, the pressure relief hole is arranged on the air outlet section of the scroll casing, which belongs to a part of the positive pressure section of the circulating air path.

[0015] As a preferred solution of the present application, the pressure relief hole is arranged on the side of the air outlet section of the scroll casing or the side facing away from the drying tub.

[0016] In some embodiments, the pressure relief hole is arranged on the first support for supporting one axial end of the drying tub, and is located between the circumferential surface of the drying tub and the air inlet hole arranged on the first support for connecting with the scroll casing.

[0017] In some embodiments, a filter screen is arranged in the air duct, and the pressure relief hole is arranged on the air duct between the drying tub and the filter screen.

[0018] In some embodiments, the pressure relief hole comprises:

[0019] a first pressure relief hole arranged on the air outlet section of the scroll casing; or / and,

[0020] a second pressure relief hole arranged on the first support for supporting one axial end of the drying tub of the drying machine; or / and,

[0021] a third pressure relief hole arranged on the air duct.

[0022] In some embodiments, the pressure relief hole is determined in size as follows:

[0023]

[0024] In formula 1), A is the area of the pressure relief hole, Q0 is the total circulating air volume of the drying machine, K is the leakage coefficient of the pressure relief hole, n is the characteristic coefficient of the pressure relief hole, and P is the pressure in the drum. 漏 桶 In some embodiments, the pressure relief hole is determined in size as follows:

[0025] In some embodiments, the pressure relief hole is determined in size as follows:

[0026]

[0027] In formula 2), A is the area of the pressure relief hole, Q0 is the total circulating air volume of the drying machine, K is the leakage coefficient of the pressure relief hole, n is the characteristic coefficient of the pressure relief hole, and P is the pressure in the drum. 桶

[0028] ​​The beneficial effects of the present application at least include:

[0029] The drying machine provided by the present application can reduce the pressure in the drying barrel of the drying machine due to the pressure relief hole arranged on the positive pressure section of the circulating air path, thereby greatly reducing the leakage of the dynamic seal at both ends of the drying barrel of the drying machine, improving the sealing effect of both ends of the drying barrel of the drying machine, and improving the drying effect of the drying machine and the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] In the drawings:

[0032] Figure 1 It is a structural schematic diagram of a drying machine;

[0033] Figure 2 It is a principle schematic diagram of the hot air circulating system of the embodiment of the present application;

[0034] Figure 3 It is a leakage characteristic curve of the drying barrel of a certain machine;

[0035] Figure 4 It is a setting principle schematic diagram of the pressure relief hole;

[0036] Figure 5 It is Figure 1 It is a back structure schematic diagram of the drying machine shown;

[0037] Figure 6 It is Figure 5 It is an assembly schematic diagram of the first support and the volute in the present application.

[0038] In the drawings:

[0039] 1-drying barrel, 2-door body, 3-filter screen, 4-second support, 5-condenser, 6-evaporator, 7-base, 8-fan, 9-volute, 901-air inlet, 902- accommodating cavity, 903-air outlet section, 904-air outlet, 10-first sealing gasket, 11-second sealing gasket, 12-first support, 13-outer shell, 14-electronic control board, 15-first pressure relief hole, 16-second pressure relief hole. DETAILED DESCRIPTION

[0040] With reference to the drawings and the specific embodiments, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0041] It should be noted that all the direction indications in the embodiments of the present application are only used to explain the relative position relationship and movement between the components in a certain posture, and if the certain posture changes, the direction indications will also change accordingly.

[0042] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. For simplicity of the present application's disclosure, the components and settings of specific examples are described in the following. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to the same numbers and / or the same letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0043] The present application will be described below in conjunction with the drawings and specific embodiments:

[0044] In order to solve the sealing between the hot air circulation system and the drying barrel of the clothes dryer, so as to reduce the leakage of circulating hot air as much as possible, the end part of the drying barrel of the clothes dryer in the prior art is provided with a sealing structure. The existing sealing structure usually adopts a radial dynamic sealing or end face dynamic sealing mode, that is, a sealing element in contact with the end part of the drying barrel of the clothes dryer in the radial or axial direction is arranged on the support ring of the drying barrel of the clothes dryer. However, when the end part of the drying barrel of the clothes dryer is sleeved on the above-mentioned support ring, radial or axial assembly errors will be generated between them, and the rotation of the drying barrel will have radial and axial runout, which will cause uneven sealing of the end part of the drying barrel, that is, the gap between the end part of the drying barrel and the contact part of the support ring is small in some positions and large in other positions, and with the extension of the working time, the sealing strip will be continuously worn, which will cause the sealing of the end part of the drying barrel to be more and more uneven, and the leakage will be larger and larger.

[0045] There are many related patents for improving the end face sealing of the drying barrel, such as CN201210559400.7, which either increases the cost or does not improve significantly.

[0046] The leakage of high-temperature and high-humidity gas at both ends of the drying barrel will have many adverse effects on the clothes dryer, which are as follows:

[0047] (1) The leakage of high-temperature and high-humidity air in the drying barrel will discharge a large amount of heat energy and water vapor, causing energy loss of the air duct system and increasing the energy consumption of the clothes dryer, and reducing the condensation efficiency;

[0048] (2) The leaked high-temperature and high-humidity steam enters between the air duct system and the shell of the clothes dryer, and there are many control panels and electronic components in the shell, so the leaked moisture will affect the reliability of the electrical components and cause damage to the clothes dryer.

[0049] (3) The leaked high-temperature and high-humidity gas will condense into water on the metal shell plate, and a large amount of condensed water flowing out of the clothes dryer will cause concern to the consumer and affect the user experience.

[0050] Therefore, the prior art needs to be improved.

[0051] Figure 1 A schematic view of a clothes dryer. In combination Figure 1 , the clothes dryer mainly comprises a drying barrel 1, a door body 2, a filter screen 3, a second support 4, a condenser 5, an evaporator 6, a base 7, a fan 8, a volute 9, a first sealing gasket 10, a second sealing gasket 11, a first support 12, a shell body 13, and an electrical control panel 14. When using the clothes dryer, the rolling drying barrel 1 rotates at a certain speed to tumble the clothes, and at the same time, the condenser 5 works, the hot air generated is introduced into the volute 9 through the started fan 8, the hot air enters the drying barrel 1 storing clothes through the guidance of the volute 9, the water vapor evaporated by the clothes is introduced into the evaporator 6 through the air duct to condense into water, and then discharged from the machine, the steam removed of water is introduced into the condenser 5 for heating, and then introduced into the volute 9 by the started fan 8 again, so as to form a hot air circulation system of the clothes dryer. After the clothes stored in the drying barrel are dried, the door body 2 is opened to take out the dried clothes.

[0052] In combination Figure 1 , the drying barrel 1 needs to rotate to tumble the clothes, the axial front end opening direction of the drying barrel 1 is in contact with the second support 4, the sealing structure on the second support 4 is in contact with the second sealing gasket 11 to form a dynamic seal, thereby constituting a front seal; the axial rear end of the drying barrel 1 is in contact with the first support 12, the sealing structure on the first support 12 is in contact with the first sealing gasket 10 to form an end face dynamic seal, thereby constituting a rear seal, and the front and first sealing gaskets of the drying barrel 1 are sealed to prevent the air duct system from leaking air outside the drying barrel.

[0053] In combination Figure 1 , the first support 12 can be the rear shell of the shell body 13, and the second support 4 can be the front shell of the shell body 13.

[0054] In combination Figure 1, the control board 14 is outside the hot air circulation system and is located in the outer shell 13, so that the high-temperature and high-humidity gas leaked from the front and rear dynamic seals of the clothes drying barrel 1 fills the space in the hot air circulation system and the outer shell, affecting the reliability of the control board 14, and condensing into water on the outer shell wall.

[0055] In combination Figure 1 , the door body 2 is installed on the second support 4, and after the door body 2 is closed, the clothes and the hot air can be prevented from leaking from the door body 2; the hot air passing through the clothes in the clothes drying barrel 1 contains lint and other impurities, so a filter screen 3 is arranged on the pipeline connecting the clothes drying barrel 1 and the evaporator to filter the lint and prevent the lint and other impurities from entering the evaporator 6. The filter screen 3 can be installed on the second support 4, and the filter screen 3 can be conveniently taken out for cleaning the lint and other impurities.

[0056] In combination Figure 1 , the evaporator 6 and the condenser 5 of the hot air circulation system are sequentially installed on the air duct arranged on the base 7, and the fan 8 is driven to rotate by the motor and cooperates with the volute 9 to provide air pressure and air volume for the hot air circulation system.

[0057] Figure 2 is a schematic diagram of the principle of the hot air circulation system of the embodiment of the application. In combination Figure 2 , the flow direction of the internal circulation air of the hot air circulation system is shown by arrows in the figure, and the fan 8 provides a 500 Pa air pressure power, and the hot air flows from the inlet to the outlet of the fan (the inlet of the fan is negative pressure, and the outlet is positive pressure), flows out of the fan, enters the clothes drying barrel from the rear end of the clothes drying barrel 1, flows out of the clothes drying barrel 1 from the front (the inside of the clothes drying barrel is positive pressure), flows to the evaporator 6 and the condenser 5 after passing through the filter screen 3, and returns to the inlet of the fan 8, forming a cycle.

[0058] According to theoretical analysis, the leakage amount Q 漏 of the clothes drying barrel at both ends is determined by the following formula:

[0059]

[0060] , wherein Q 漏 is the leakage amount of the clothes drying barrel at both ends; K is the leakage coefficient of the leakage hole, A is the size of the leakage hole, and n is the characteristic coefficient of the leakage hole, which is related to the shape of the leakage hole and usually has a value of 1.2-2, which is a certain value; P 桶 is the pressure in the clothes drying barrel, which is determined by the sealing characteristics of the clothes drying machine system; Po is the atmospheric pressure outside the clothes drying barrel, which is a certain value and is taken as 0.

[0061] It can be seen from the above formula that the leakage of the clothes drying machine is mainly determined by the sealing position leakage characteristics and the pressure in the barrel, so the leakage amount can be reduced by the following two methods:

[0062] a) Reducing the leakage coefficient K at the leakage hole can reduce the leakage amount, which is a common method in existing technology. This involves improving the seal at both ends of the dryer tub to reduce the leakage coefficient K and thus reduce the leakage amount. However, this method of reducing leakage by increasing the seal at both ends of the dryer tub increases the rotational resistance of the dryer tub, increases the motor power, and is complex, costly, and the improvement effect is not very significant.

[0063] b. Reduce the pressure P inside the dryer drum. 桶 The leakage rate can also be significantly reduced.

[0064] The relationship between the leakage rate and the internal pressure of the drum can also be obtained through experimental testing, such as testing the leakage characteristic curves at both ends of a prototype dryer drum (e.g.) Figure 3 As shown), and by fitting the data, the relationship between leakage and internal pressure can be obtained as follows: In this formula, Q 漏 P represents the leakage at both ends of the dryer drum. 桶 This refers to the pressure inside the dryer drum.

[0065] The clothes dryer shown in this application embodiment reduces leakage at both ends of the drying drum by lowering the internal pressure.

[0066] The design concept of this application embodiment is as follows: a pressure relief hole is provided on the positive pressure section of the circulating air path, and the internal pressure of the drying drum is reduced by the pressure relief hole to reduce the leakage at both ends of the drying drum.

[0067] Figure 4 This is a schematic diagram illustrating the design principle of the pressure relief vent, combined with... Figure 1 as well as Figure 4 The clothes dryer provided in this application embodiment includes a volute 9, a fan 8, and a drying drum 1. The volute 9 is provided with an air inlet 901, a receiving cavity 902, and an air outlet section 903. An air outlet 904 is provided on the air outlet section 903. The fan 8 is disposed in the receiving cavity 902 of the volute 9. The air outlet 904 of the volute 9 is connected to one axial end of the drying drum 1, and the air inlet 904 of the volute 9 is connected to the other axial end of the drying drum 1 through an air duct to form a circulating air path. A pressure relief hole is provided on the positive pressure section of this circulating air path.

[0068] When using the dryer, the rotating drying drum 1 rotates at a certain speed to tumble the clothes. Simultaneously, hot air is introduced into the volute 9 by the activated fan 8. Guided by the volute 9, the hot air enters the drying drum 1 containing the clothes, removing the water vapor evaporated from the clothes. The hot air is then reintroduced into the volute 9 by the activated fan 8, creating a continuous hot air circulation system for the dryer. The specific airflow path is described above and will not be elaborated upon here.

[0069] The clothes dryer provided by the application can realize reduction of the pressure in the drying barrel of the clothes dryer, can greatly reduce the leakage of the dynamic seal at both ends of the drying barrel of the clothes dryer, can improve the sealing effect between the hot air circulation system and the drying barrel of the clothes dryer, and can improve the drying effect of the clothes dryer and improve the user experience.

[0070] Specifically, in the embodiment of the application, the positive pressure section of the circulation air path is the circulation air path between the outlet of the fan 8 and the filter screen 3 along the airflow direction in the circulation air path, and a properly sized pressure relief hole is arranged at the position, so that the pressure P in the drying barrel of the clothes dryer can be reduced. 桶 The pressure in the drying barrel of the clothes dryer is controlled to be less than 120 Pa, and thus the leakage of the dynamic seal at both ends of the drying barrel of the clothes dryer can be greatly reduced.

[0071] In some embodiments, the pressure relief hole of the embodiment of the application can be provided with one or more, and the corresponding setting can be made according to the specific structure of the clothes dryer, and the specific setting position is described in detail below.

[0072] The size of the pressure relief hole is a key factor for reducing the leakage of the dynamic seal at both ends of the drying barrel of the clothes dryer, and also an important factor affecting the drying efficiency, because if the pressure relief hole is too large, although the leakage of the dynamic seal at both ends of the drying barrel of the clothes dryer can be greatly reduced, the amount of hot air entering the drying barrel is also reduced, which affects the drying efficiency; on the contrary, if the pressure relief hole is too small, although the amount of hot air entering the drying barrel is ensured, the drying efficiency is ensured, but the improvement effect on the leakage of the dynamic seal at both ends of the drying barrel of the clothes dryer is not obvious, based on this, the area of the pressure relief hole is set to 20-1500 mm 2 The pressure in the drying barrel of the clothes dryer is controlled to be less than 120 Pa, and thus the leakage of the dynamic seal at both ends of the drying barrel of the clothes dryer can be greatly reduced, and the amount of hot air entering the drying barrel can also be ensured, and the drying efficiency can be ensured.

[0073] As for the shape of the pressure relief hole, the embodiment of the application does not make specific limitation, which can be circular, oval, waist round, square or special-shaped, etc., as long as the opening area is ensured. In addition, in the case of being provided with multiple pressure relief holes, the sum of the areas of the multiple pressure relief holes needs to be ensured within the above-mentioned setting range.

[0074] For example, the pressure relief hole is a circular hole with a hole diameter of 20 mm, and the pressure in the barrel before the hole is opened is 170 Pa, and the pressure in the barrel after the hole is opened is 80 Pa, which can meet the above-mentioned requirements.

[0075] The setting position of the pressure relief hole is described below:

[0076] 1. The pressure relief vent is located on the air outlet section 903 of the volute 9, specifically on the air outlet section of the volute 9 after passing the volute tongue (e.g., Figure 1 (in the Chinese frame position).

[0077] Figure 5 for Figure 1 The diagram shown illustrates the back structure of the dryer. Figure 6 for Figure 5 A schematic diagram of the assembly of the first support and the volute. (Combined with...) Figure 4 as well as Figure 5 A pressure relief hole is provided on the side of the air outlet section 903 of the volute 9 that is not facing the dryer tub 1 (i.e., the side of the volute 9 or the side facing away from the dryer tub 1). The air outlet section 903 of the volute 9 is part of the positive pressure section of the circulating air path. This pressure relief hole is the first pressure relief hole 15. The pressure relief hole at this location has little impact on condensation efficiency and energy efficiency. The shape and number of the first pressure relief hole 15 are not limited in the embodiments of this application.

[0078] 2. Combining Figure 4 as well as Figure 5 The pressure relief hole is provided on the first support 12 for supporting one axial end of the drying tub 1, and the pressure relief hole is located between the circumferential surface of the drying tub 1 and the air inlet hole opened on the first support 12 for connecting with the volute 9. That is, the pressure relief hole is provided between the first sealing gasket 10 and the air inlet hole opened on the first support 12 for connecting with the volute 9. The pressure relief hole is the second pressure relief hole 16.

[0079] 3. The pressure relief hole can also be set on the circumferential surface of the air duct between the dryer tub 1 and the filter screen 3. This pressure relief hole is the third pressure relief hole.

[0080] 4. In some embodiments, the pressure relief hole includes the first pressure relief hole 15 and the second pressure relief hole 16.

[0081] 5. In some embodiments, the pressure relief hole includes the first pressure relief hole 15 and the third pressure relief hole.

[0082] 6. In some embodiments, the pressure relief hole includes the second pressure relief hole 16 and the third pressure relief hole.

[0083] 7. In some embodiments, the pressure relief hole includes the first pressure relief hole 15, the second pressure relief hole 16, and the third pressure relief hole.

[0084] In this embodiment, the size of the pressure relief hole needs to take into account the system energy efficiency requirements, compressor condensing temperature, and exhaust temperature. That is, if the hole is too large, it will reduce the system condensing temperature and exhaust temperature. Therefore, the hole should be of an appropriate size so that the compressor condensing temperature and exhaust temperature are not too high or too low, which would affect the system performance.

[0085] According to the formula of the leakage amount of the two ends of the drying barrel, it is found in actual research and development that, under the premise of ensuring the condensation efficiency and energy efficiency of the clothes dryer, the flow through the pressure relief hole cannot exceed 20% of the total flow; according to experimental experience, Q 漏 is about 10% of the total circulating air volume Q0 of the clothes dryer, which can achieve the best comprehensive effect, that is,

[0086] Therefore, the area of the opened pressure relief hole can be determined as:

[0087]

[0088]

[0089]

[0090] In summary, the clothes dryer with the above hot air circulation system has a simple scheme for reducing the leakage amount of the dynamic seal at the two ends of the drying barrel, is easy to implement, can reduce the leakage of air volume at the two ends of the drying barrel into the clothes dryer, improve the reliability of the clothes dryer, and has obvious effect, so as to ensure that there is no leaked moisture in the clothes dryer, improve the reliability of electrical components, and will not increase power consumption, which helps to improve user experience.

[0091] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0092] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application.

[0093] In addition, the terms "first", "second", and the like in the description do not necessarily imply that the corresponding described features are important, substantial, or subordinate to one another. Rather, these terms are merely used to distinguish one feature from another. Furthermore, the terms "comprise", "include", "contain" or "have" and the like herein are used in their open-ended sense, and do not exclude the presence of other features. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0094] In the description of the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. "Under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0095] In the description of the present application, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, a person skilled in the art can combine and integrate different embodiments or examples described in the present specification.

[0096] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0097] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A clothes dryer, characterized in that, The clothes dryer includes: The volute is provided with an air inlet, a receiving cavity and an air outlet section, wherein the air outlet section is provided with an air outlet; The fan is housed within the receiving cavity of the volute. The clothes drying drum has an air outlet connected to one axial end of the volute and an air inlet connected to the other axial end of the clothes drying drum through a duct to form a circulating air path. A pressure relief hole is provided on the positive pressure section of the circulating air path. The size of the pressure relief hole is determined as follows: Formula 1); In Equation 1): A is the area of ​​the pressure relief hole, Q 漏 Let P be the leakage rate at both ends of the dryer drum, K be the leakage coefficient of the pressure relief hole, n be the characteristic coefficient of the pressure relief hole, and P be the leakage rate at both ends of the dryer drum. 桶 The pressure inside the drum; in, Q0 represents the total circulating air volume of the dryer.

2. The clothes dryer according to claim 1, characterized in that, A filter screen is installed inside the air duct. Along the airflow direction in the circulating air path, the circulating air path from the outlet of the fan to the filter screen is the positive pressure section of the circulating air path.

3. The clothes dryer according to claim 1, characterized in that, One or more pressure relief holes are provided.

4. The clothes dryer according to claim 1, characterized in that, The area of ​​the pressure relief hole is 20~1500mm². 2 .

5. The clothes dryer according to claim 1, characterized in that, The pressure relief hole is located on the air outlet section of the volute, which is part of the positive pressure section of the circulating air path.

6. The clothes dryer according to claim 5, characterized in that, The pressure relief hole is located on the side of the air outlet section of the volute or on the side facing away from the dryer tub.

7. The clothes dryer according to claim 1, characterized in that, The pressure relief hole is disposed on a first support for supporting one axial end of the drying tub, and the pressure relief hole is located between the circumferential surface of the drying tub and the air inlet hole on the first support for connection with the volute.

8. The clothes dryer according to claim 1, characterized in that, A filter screen is installed inside the air duct, and the pressure relief hole is located on the air duct between the clothes drying drum and the filter screen.

9. The clothes dryer according to claim 1, characterized in that, The pressure relief hole includes: A first pressure relief vent is provided on the air outlet section of the volute; or / and, A second pressure relief hole is provided on the first support of the dryer for supporting one axial end of the drying drum; or / and, A third pressure relief hole is provided on the air duct.

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