Air supply pipe and air heating apparatus including the same

Abstract

Provided is an air supply pipe which includes an air supply pipe body that extends in a reference direction and has a flow passage formed therein and a water receiver disposed in the flow passage and coupled to the inside of the air supply pipe body, in which the air supply pipe body includes a support portion that surrounds an outer surface of the water receiver and that is coupled to the water receiver at an end portion thereof that faces the reference direction, and the water receiver is spaced apart from an inner surface of the support portion at a certain interval to form a receiving space between the outer surface of the water receiver and the inner surface of the support portion in which water is accommodated.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0197894, filed in the Korean Intellectual Property Office on Dec. 27, 2024, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD

[0002] The present disclosure relates to an air supply pipe equipped with a water receiver and an air heating apparatus including the air supply pipe.BACKGROUND

[0003] Heating may be performed by supplying heated air using a duct connected to each room. An apparatus called a furnace is usually used to heat air. Heating may be provided by transferring heat generated by burning a fuel in the furnace to the air and distributing the heated air to each room.

[0004] In the case of the furnace, an air supply pipe is directly connected to the outside and circulates a large amount of air, and therefore the probability of condensation increases when an external environment is hot and humid. Due to the condensation phenomenon, water vapor may be condensed on the inside of an air supply flue connected with the air supply pipe so that a large amount of water may be generated. When the water enters the furnace, it may cause damage to the product.SUMMARY

[0005] The present disclosure has been made to solve the above-mentioned problems occurring in the prior art while advantages achieved by the prior art are maintained intact.

[0006] An aspect of the present disclosure provides an air supply pipe equipped with a water receiver to separately store water generated due to a condensation phenomenon and then discharge the water to the outside and an air heating apparatus including the air supply pipe.

[0007] The technical problems to be solved by the present disclosure are not limited to the aforementioned problems, and any other technical problems not mentioned herein will be clearly understood from the following description by those skilled in the art to which the present disclosure pertains.

[0008] According to an aspect of the present disclosure, an air supply pipe includes an air supply pipe body that extends in a reference direction and has a flow passage formed therein and a water receiver disposed in the flow passage and coupled to the inside of the air supply pipe body. The air supply pipe body includes a support portion that surrounds an outer surface of the water receiver and that is coupled to the water receiver at an end portion thereof that faces the reference direction. The water receiver is spaced apart from an inner surface of the support portion at a certain interval to form a receiving space between the outer surface of the water receiver and the inner surface of the support portion in which water is accommodated.

[0009] In an embodiment, the water receiver may include a coupling portion coupled to a coupling surface provided at the end portion of the support portion that faces the reference direction and an extending portion that extends from the coupling portion in a direction opposite to the reference direction by a certain length.

[0010] In an embodiment, the coupling portion may be formed in the shape of a ring having an open interior, and the extending portion may extend from an inner periphery of the coupling portion.

[0011] In an embodiment, the extending portion may have a shape in which a diameter decreases in a direction in which the extending portion extends from the coupling portion.

[0012] In an embodiment, the extending portion may include a first section that extends from the coupling portion at a first slope and a second section that extends from the first section at a second slope greater than the first slope.

[0013] In an embodiment, a length by which the first section extends may be shorter than a length by which the second section extends.

[0014] In an embodiment, when a virtual plane perpendicular to the reference direction while connecting an end portion of the support portion that faces the direction opposite to the reference direction and an outer surface of the extending portion is defined, the receiving space may be a space surrounded by the outer surface of the extending portion, the inner surface of the support portion, and the virtual plane.

[0015] In an embodiment, a reference volume of the receiving space may be a value obtained by multiplying a limit weight calculated based on a bonding area of the coupling portion bonded to the coupling surface by a preset safety factor.

[0016] In an embodiment, an air supply flue that supplies outside air may be coupled to the air supply pipe, and an end portion of the water receiver that faces a direction opposite to the reference direction may have an outer diameter smaller than an inner diameter of the air supply flue.

[0017] In an embodiment, the end portion of the water receiver that faces the direction opposite to the reference direction may be located inside the air supply flue.

[0018] In an embodiment, an end portion of the air supply flue that faces the reference direction may be seated on the support portion.

[0019] In an embodiment, the air supply pipe body may include a drain pipe having a drain passage formed therein to be fluidically connected with the receiving space, and the water accommodated in the receiving space may be discharged to the outside through the drain pipe.

[0020] In an embodiment, the air supply pipe body may further include a pipe body having the flow passage and the support portion formed therein and open in a direction parallel to the reference direction and a flange that extends outward from an end portion of the pipe body that faces the reference direction, and the drain pipe may extend from the pipe body such that the drain passage penetrates the support portion.

[0021] In an embodiment, at least a portion of an inner surface of the pipe body may protrude inward along a circumferential direction to form the support portion.

[0022] In an embodiment, based on an end portion of the air supply pipe body that faces the reference direction, an end portion of the water receiver that faces a direction opposite to the reference direction may be located at a higher position than an end portion of the support portion that faces the direction opposite to the reference direction.

[0023] According to another aspect of the present disclosure, an air heating apparatus includes a main body and an air supply pipe to which an air supply flue is connected, the air supply pipe being coupled to the main body to supply air into the main body. The air supply pipe includes an air supply pipe body that extends in a reference direction and has a flow passage formed therein and a water receiver disposed in the flow passage and coupled to the inside of the air supply pipe body. The air supply pipe body includes a support portion that surrounds an outer surface of the water receiver and that is coupled to the water receiver at an end portion thereof that faces the reference direction. The water receiver is spaced apart from an inner surface of the support portion at a certain interval to form a receiving space between the outer surface of the water receiver and the inner surface of the support portion in which water is accommodated.

[0024] In an embodiment, the air supply pipe may further include at least one drain pipe having a drain passage formed therein to be fluidically connected with the receiving space. The drain pipe may be connected with a condensate trap through a pipe, the condensate trap being coupled to an outer surface of the main body, and the water accommodated in the receiving space may be discharged to the condensate trap through the drain pipe.

[0025] In an embodiment, an end portion of the water receiver that faces a direction opposite to the reference direction may have an outer diameter smaller than an inner diameter of the air supply flue.

[0026] In an embodiment, an end portion of the water receiver that faces a direction opposite to the reference direction may be located inside the air supply flue.

[0027] In an embodiment, based on an end portion of the air supply pipe body that faces the reference direction, an end portion of the water receiver that faces a direction opposite to the reference direction may be located at a higher position than an end portion of the support portion that faces the direction opposite to the reference direction.BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present disclosure will be more apparent from the following detailed description taken in conjunction with the accompanying drawings:

[0029] FIG. 1 is a perspective view of an air heating apparatus equipped with an air supply pipe according to an embodiment of the present disclosure;

[0030] FIG. 2 is a perspective view of the air supply pipe according to an embodiment of the present disclosure;

[0031] FIG. 3 is a sectional perspective view of the air supply pipe according to an embodiment of the present disclosure;

[0032] FIG. 4 is a sectional perspective view of the air supply pipe according to an embodiment of the present disclosure;

[0033] FIG. 5 is a perspective view of a water receiver of the air supply pipe according to an embodiment of the present disclosure;

[0034] FIG. 6 is a sectional view illustrating a state in which the air supply pipe and an air supply flue are coupled to each other according to an embodiment of the present disclosure;

[0035] FIG. 7 is a view illustrating a state in which water is accommodated in a receiving space in the air supply pipe according to an embodiment of the present disclosure;

[0036] FIG. 8 is a view illustrating a state in which the air supply pipe is equipped with a filter according to an embodiment of the present disclosure; and

[0037] FIG. 9 is a view illustrating an operation in which the filter is coupled to an air supply pipe body of the air supply pipe according to an embodiment of the present disclosure.DETAILED DESCRIPTION

[0038] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the exemplary drawings. In adding the reference numerals to the components of each drawing, it should be noted that the identical or equivalent component is designated by the identical reference numeral even when they are displayed on other drawings. Further, in describing the embodiment of the present disclosure, a detailed description of well-known features or functions will be ruled out in order not to unnecessarily obscure the gist of the present disclosure.

[0039] In this specification, a front-rear direction, a left-right direction, and an up-down direction are referred to for convenience of description and may be directions orthogonal to each other. However, these directions may be relatively determined with respect to the direction in which components of an air supply pipe are arranged, and the up / down direction does not necessarily mean the vertical direction.

[0040] In addition, terms including ordinal numbers such as “first,”“second,” and the like used herein may be used to describe various components. However, the components are not limited by the terms, and the terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the spirit and scope of the present disclosure, a first component may be referred to as a second component, and similarly, the second component may also be referred to as the first component. As used herein, the term “and / or” includes a combination of a plurality of related described items or any one of the plurality of related described items.

[0041] FIG. 1 is a perspective view of an air heating apparatus equipped with an air supply pipe according to an embodiment of the present disclosure.

[0042] Referring to FIG. 1, the air heating apparatus 1 according to an embodiment may include a main body 10 and the air supply pipe 20 coupled to the main body 10. The main body 10 may accommodate components for operation of the air heating apparatus 1, and the air supply pipe 20 may be connected with an air supply flue 50 and may supply outside air into the main body 10.

[0043] The air heating apparatus 1 may heat the air supplied from the outside and may provide the heated air to a space requiring heating. For example, the air heating apparatus 1 may be referred to as a furnace.

[0044] For example, the air heating apparatus 1 may operate in such a manner that water stored in an expansion tank is heated in a water heater and then sent to a heating heat exchanger, the heated water sent to the heating heat exchanger heats air supplied from a fan, and the heated air is delivered to the space requiring heating.

[0045] Although not illustrated, the expansion tank, the water heater, the heating heat exchanger, and the fan may be disposed inside the main body 10, and the air introduced through the air supply pipe 20 may be provided to a burner of the water heater. In addition, a combustion gas generated by a combustion reaction of the water heater may be delivered to an exhaust pipe 40 formed through an outer wall of the main body 10 and may be discharged to the outside.

[0046] Meanwhile, components included in the main body 10 of the air heating apparatus 1 are not limited to the examples described above, and additional components may be further provided.

[0047] The air supply pipe 20 may penetrate the outer wall of the main body 10 and may be coupled to the main body 10. The air supply pipe 20 may be provided such that the outside air flows through the air supply pipe 20 and is supplied to at least one of the components included in the main body 10.

[0048] When condensation occurs in the air supply flue 50, the air supply pipe 20 may store water droplets formed on an inner wall of the air supply flue 50 through a water receiver included in the air supply pipe 20 and may discharge the stored water to a condensate trap 30 included in the main body 10. To this end, the air supply pipe 20 may be connected with the condensate trap 30 through a pipe 60.

[0049] Accordingly, the water caused by the condensation may be separated and discharged to the outside without being drawn into the air heating apparatus 1. The overall structure of the water supply pipe 20 including the water receiver will be described below in detail with reference to FIGS. 2 to 5.

[0050] FIG. 2 is a perspective view of the air supply pipe according to an embodiment of the present disclosure. FIG. 3 is a sectional perspective view of the air supply pipe according to an embodiment of the present disclosure. FIG. 4 is a sectional perspective view of the air supply pipe according to an embodiment of the present disclosure. FIG. 5 is a perspective view of the water receiver of the air supply pipe according to an embodiment of the present disclosure.

[0051] FIG. 2 is a view specifically illustrating the air supply pipe 20 illustrated in FIG. 1. FIG. 3 is a view illustrating a cross-section obtained by cutting the air supply pipe 20 illustrated in FIG. 2 in a direction A-A′. FIG. 4 is a view illustrating a cross-section obtained by cutting the air supply pipe illustrated in FIG. 2 in a direction B-B′. FIG. 5 is a view separately illustrating only the water receiver 200 of the air supply pipe 20 illustrated in FIGS. 2 to 4.

[0052] Referring to FIGS. 2 to 5, the water supply pipe 20 according to an embodiment may include an air supply pipe body 100 that extends in a reference direction D and is open at an end thereof that faces the reference direction D and at an end thereof that faces the direction opposite to the reference direction D and the water receiver 200 disposed in the water supply pipe body 100.

[0053] In this specification, the reference direction D may be a downward direction. However, without being limited thereto, the reference direction D may vary depending on the direction in which the air supply pipe 20 is disposed.Air Supply Pipe Body 100

[0054] The air supply pipe body 100 may include a pipe body 110 having a flow passage 111 formed therein, a drain pipe 120 extending from the pipe body 110 so as to be fluidically connected with the flow passage 111, and a flange 130 extending outward from an end portion of the pipe body 110 that faces the reference direction D.

[0055] The pipe body 110 may have an opening formed in the end portion of the pipe body 110 that faces the reference direction D and an opening formed in an end portion of the pipe body 110 that faces the direction opposite to the reference direction D and may extended by a certain length. The opening facing the reference direction D and the opening facing the direction opposite to the reference direction D may form an upper end and a lower end of the flow passage 111. As a drain passage 123 of the drain pipe 120 penetrates the pipe body 110, a drain hole 113 may be formed on the inside of the pipe body 110. In this specification, the pipe body 110 is illustrated in a cylindrical shape, but the shape of the pipe body 110 is not limited to the cylindrical shape.

[0056] A coupling surface 114 to which the water receiver 200 is coupled may be provided at the end portion of the pipe body 110 that faces the reference direction D. The coupling surface 114 may be one surface of a step formed as at least a portion of an inner surface of the pipe body 110 protrudes inward (e.g., a support portion 112). The coupling surface 114 may be provided at a position spaced apart from the position of the drain hole 113 in the reference direction D. That is, the coupling surface 114 may be located below the drain hole 113.

[0057] The pipe body 110 may include the support portion 112 that protrudes from the inner surface of the pipe body 110 to surround at least a portion of the water receiver 200. An end surface of the support portion 112 that faces the reference direction D may be the coupling surface 114 to which the water receiver 200 is coupled. At least a portion of the inner surface of the pipe body 110 may protrude inward along a circumferential direction to form the support portion 112. Meanwhile, although not illustrated, the support portion 112 may be a portion on which the air supply flue 50 is seated and supported when the air supply flue 50 is coupled to the air supply pipe 20 (e.g., refer to FIG. 6).

[0058] The coupling surface 114 to which the water receiver 200 is coupled may be provided at a lower end of the support portion 112. The drain hole 113 may be formed in the support portion 112. For example, the drain passage 123 may extend through the support portion 112 to form the drain hole 113 on an inner surface of the support portion 112.

[0059] As the support portion 112 surrounds the water receiver 200 but is spaced apart from an outer surface of the water receiver 200, the support portion 112, together with the water receiver 200, may form a receiving space S in which water is accommodated. The receiving space S may be fluidically connected with the drain passage 123 through the drain hole 113. That is, the water accommodated in the receiving space S may flow into the drain passage 123 through the drain hole 113.

[0060] An end portion of the support portion 112 that faces the direction opposite to the reference direction D may be located at a lower position than an end portion of the water receiver 200 that faces the direction opposite to the reference direction D. That is, the water receiver 200 may protrude from the support portion 112 in the direction opposite to the reference direction D by a certain height.

[0061] The drain pipe 120 may include one or more drain pipes. For example, the drain pipe 120 may include a first drain pipe 121 and a second drain pipe 122 that forms a certain angle with the first drain pipe 121. The drain pipe 120 may be a component connected with a condensate trap (e.g., the condensate trap 30 of FIG. 1), and depending on the position where the condensate trap 30 is disposed, one of the first drain pipe 121 and the second drain pipe 122 may be connected with the condensate trap 30. However, the number of drain pipes 120 and / or the positions thereof are not particularly limited and may be changed in various ways.

[0062] The flange 130 may be a component coupled to a main body (e.g., the main body 10 of FIG. 1) of an air heating apparatus (e.g., the air heating apparatus 1 of FIG. 1). Referring to FIG. 1 together, the flange 130 may be seated on the outer surface of the main body 10 to which the air supply pipe 20 is coupled and may be coupled to the main body 10 through a fastening means to fix the air supply pipe 20 to the main body 10.Water Receiver 200

[0063] The water receiver 200 may be coupled to the inside of the water supply pipe body 100 to form the receiving space S in which water is accommodated, together with a partial area of the inner surface of the pipe body 110. The water receiver 200 may be coupled to the coupling surface 114 of the support portion 112 of the pipe body 110. For example, the water receiver 200 may be fused to the coupling surface 114. The water receiver 200 may be formed in a shape corresponding to the pipe body 110.

[0064] The water receiver 200 may include a coupling portion 210 formed in a ring shape and coupled to the pipe body 110 and an extending portion 220 extending from an inner periphery of the coupling portion 210 in the direction opposite to the reference direction D by a certain length.

[0065] The coupling portion 210 may be coupled to the coupling surface 114 of the pipe body 110. For example, the coupling portion 210 may be formed in an annular shape in correspondence to the cylindrical shape of the pipe body 110, and one surface of the coupling portion 210 may be fused to the coupling surface 114. Here, the one surface of the coupling portion 210 fused to the coupling surface 114 may be a surface that faces the direction opposite to the reference direction D.

[0066] The extending portion 220 may be a component that forms the receiving space S together with the inner surface of the pipe body 110. For example, an outer surface of the extending portion 220 may be disposed to face the inner surface of the support portion 112. The extending portion 220 may extend from the coupling portion 210 in the direction opposite to the reference direction D, but may be gradually narrowed in the direction opposite to the reference direction D. That is, the extending portion 220 may be formed in a shape in which the outer diameter thereof increases in the reference direction D.

[0067] The extending portion 220 may include a first section 221 extending from the coupling portion 210 and a second section 222 extending from the first section 221 and having a slope different from the slope of the first section 221. For example, the first section 221 may extend to have a gentle slope when compared to the second section 222. The length by which the first section 221 extends may be shorter than the length by which the second section 222 extends.

[0068] The shape and volume of the receiving space S may be determined depending on the shape of the extending portion 220. For example, the receiving space S may be defined as a space surrounded by the outer surface of the extending portion 220 and the inner surface of the support portion 112, and the shape and size of the receiving space S may vary depending on the shape of the extending portion 220.

[0069] The receiving space S may be a space defined by a virtual annular plane P together with the outer surface of the extending portion 220 and the inner surface of the support portion 112, in which the virtual annular plane P connects the end portion of the support portion 112 that faces the direction opposite to the reference direction D and the outer surface of the extending portion 220 and is perpendicular to the reference direction D.

[0070] The extending portion 220 may be formed in a shape corresponding to a preset reference volume of the receiving space S. The reference volume may be determined based on the limit weight that the water receiver 200 is able to accommodate, in which the limit weight is calculated based on the bonding area (or, the fusing area) of the coupling portion 210 coupled to the support portion 112. The reference volume of the receiving space S may be calculated by Equation 1 below.V=x⁢ cm2×6⁢ kg⁢ f / cm29.8 m / s2×N[Equation⁢ 1]

[0071] In Equation 1 above, x may be the bonding area of the coupling portion 210, and N may be a safety factor. N may preferably be 4, but is not limited thereto.

[0072] For example, when the safety factor N is 4 and the bonding area x is 0.9 cm2 in Equation 1 above, the limit weight may be about 551 g (about 0.551 kg), and the weight of water considering the safety factor N may be about 137.75 g. Accordingly, the reference volume V may be calculated to be about 137.75 cm3 In this case, the water receiver 200 (particularly, the extending portion 220) may be formed in a shape capable of providing the receiving space S having a volume of about 137.75 cm3.

[0073] FIG. 6 is a sectional view illustrating a state in which the air supply pipe and the air supply flue are coupled to each other according to an embodiment of the present disclosure. FIG. 7 is a view illustrating a state in which water is accommodated in the receiving space in the air supply pipe according to an embodiment of the present disclosure.

[0074] FIG. 6 is a sectional view illustrating a state in which the main body 10, the air supply pipe 20, and the air supply flue 50 are coupled in the air heating apparatus 1 illustrated in FIG. 1. FIG. 7 is a view illustrating a state in which the receiving space S of the air supply pipe 20 is filled with water W.

[0075] For example, FIG. 7 illustrates the support portion 112 of the pipe body 110 and the water receiver 200 separated from each other to represent the receiving space S and illustrates the state in which the receiving space S is filled with the water W, and it can be understood that the water W in the receiving space S is shaded. That is, the shape and size (or, amount) of the water W shaded in FIG. 7 may mean the shape and size (or, volume) of the receiving space S.

[0076] The components illustrated in FIGS. 6 and 7 are substantially the same as the components described with reference to FIGS. 1 to 5, and therefore repetitive description will be omitted.

[0077] Referring to FIGS. 6 and 7, the air supply pipe 20 according to an embodiment may be coupled with the main body 10 in the reference direction D and may be coupled with the air supply flue 50 in the direction opposite to the reference direction D. Accordingly, air outside the air heating apparatus 1 may flow through the air supply flue 50 and the air supply pipe 20 in the reference direction D and may be supplied into the main body 10.

[0078] The air supply pipe 20 may include the air supply pipe body 100 including the pipe body 110, the drain pipe 120, and the flange 130 and the water receiver 200 including the coupling portion 210 and the extending portion 220.

[0079] The air supply flue 50 may be inserted into the flow passage 111 in the pipe body 110, and an end portion of the air supply flue 50 that faces the reference direction D may be seated and supported on the support portion 112. The air supplied from the outside through the air supply flue 50 may pass through the flow passage 111 of the pipe body 110 and the water receiver 200 and may flow into the main body 10. The flange 130 may be coupled to the main body 10 through a coupling means.

[0080] The extending portion 220 may be formed such that the outer diameter OD of an end portion thereof that faces the direction opposite to the reference direction D is smaller than the inner diameter of the air supply flue 50. Accordingly, water droplets W formed on the inner surface of the air supply flue 50 may flow into the receiving space S along the outer surface of the extending portion 220, may flow from the receiving space S to the drain pipe 120 through the drain hole 113, and may be discharged to the outside.

[0081] The diameter of the drain passage 123 of the drain pipe 120 may be calculated by Equation 2 below. Here, the diameter of the drain passage 123 may mean the inner diameter of a cross-section obtained by cutting the drain passage 123 with a plane parallel to the reference direction D.A=0.9⁢8×0.2⁢5×d2×π×√2⁢ g⁢ H[Equation⁢ 2]

[0082] In Equation 2 above, A represents the amount of condensate generated under a certain condition, d represents the diameter of the drain passage 123, and H represents the height of the water receiver 200.

[0083] The water receiver 200 may be provided such that at least a portion of the extending portion 220 is located inside the air supply flue 50. For example, the end portion of the extending portion 220 that faces the direction opposite to the reference direction D may be accommodated inside the air supply flue 50, and the outer surface of the extending portion 220 located inside the air supply flue 50 may be spaced apart from the inner surface of the air supply flue 50.

[0084] As the upper end portion of the extending portion 220 is located inside the air supply flue 50 as described above, the upper end of the support portion 112 may be located below the upper end of the extending portion 220 (that is, in the reference direction D). Accordingly, the upper end of the receiving space S may also be located below the upper end of the extending portion 220. That is, as illustrated in FIG. 7, the upper end of the extending portion 220 protrudes upward from the receiving space S by a certain length. Thus, the water stored in the receiving space S may be prevented from flowing into the main body 10 through the inside of the water receiver 200.

[0085] The inner diameter ID of the end portion of the extending portion 220 that faces the direction opposite to the reference direction D may be formed in a size that does not affect the combustion reaction occurring inside the main body 10. For example, the inner diameter ID of the upper end portion of the extending portion 220 (that is, the diameter of an inlet through which air is introduced) may be greater than or equal to the diameter of an air supply pipe of a blower disposed inside the main body 10.

[0086] Specifically, the blower for supplying air to the burner may be provided inside the main body 10, and the inner diameter ID of the upper end portion of the extending portion 220 may be greater than or equal to the diameter of the air supply pipe of the blower. This considers that when the inner diameter ID of the upper end portion of the water receiver 200 is smaller than the diameter of the air supply pipe of the blower, the efficiency of the burner is reduced because the inner diameter ID of the upper end portion of the water receiver 200 is related to the amount of air drawn from the outside to the inside. Meanwhile, the diameter of the air supply pipe of the blower may range from about 1 inch to about 1.25 inches, but is not limited thereto.

[0087] The air supply pipe 20 may further include a filter 300 provided at an end portion of the air supply pipe 20 in the reference direction D so as to be located inside the main body 10 in the state in which the air supply pipe 20 is coupled to the main body 10.

[0088] As illustrated in FIGS. 6 and 7, when condensation occurs on the inner surface of the air supply flue 50 due to a certain external environment (e.g., an environment in which hot and humid air is supplied), the water droplets W formed on the inner surface of the air supply flue 50 may flow along the air supply flue 50 and may be collected in the receiving space S provided by the water receiver 200. The water W collected in the receiving space S may move to the drain pipe 120 through the drain hole 113 and may be discharged to the outside. Accordingly, the water may be prevented from being drawn into the air heating apparatus 1, and the durability and stability of the product may be improved.

[0089] FIG. 8 is a view illustrating a state in which the air supply pipe is equipped with the filter according to an embodiment of the present disclosure. FIG. 9 is a view illustrating an operation in which the filter is coupled to the air supply pipe body of the air supply pipe according to an embodiment of the present disclosure.

[0090] The air supply pipe 20 illustrated in FIGS. 8 and 9 is substantially the same as the air supply pipe 20 described with reference to FIGS. 1 to 7, and therefore repetitive description will be omitted.

[0091] Referring to FIGS. 8 and 9, the air supply pipe 20 according to an embodiment may include the air supply pipe body 100 and the filter 300 coupled to the end portion of the air supply pipe body 100 that faces the reference direction D.

[0092] Referring to FIG. 6 together, the filter 300 may be located on one side of the water receiver 200 that faces the reference direction D. That is, the filter 300 may be provided at a position where air introduced in the reference direction D toward the air supply pipe 20 passes and may filter the air discharged from the air supply pipe body 100 and introduced into the main body 10.

[0093] The flange 130 may include a filter mounting portion 131 on which the filter 300 is mounted. The filter mounting portion 131 may extend in the reference direction D from one surface of the flange 130 that faces the reference direction D. The filter mounting portion 131 may be provided such that the filter 300 is mounted in a direction perpendicular to the reference direction D. For example, the filter 300 may be moved in the direction perpendicular to the reference direction D, and at least a portion of the periphery of the filter 300 may be stopped by the filter mounting portion 131. Accordingly, the filter 300 may be mounted on the flange 130.

[0094] According to the embodiments of the present disclosure, the water supply pipe may be equipped with the water receiver to separately store and discharge water. Thus, the water may be prevented from being drawn into the air heating apparatus, and the durability and stability of the product may be secured.

[0095] Hereinabove, although the present disclosure has been described with reference to exemplary embodiments and the accompanying drawings, the present disclosure is not limited thereto, but may be variously modified and altered by those skilled in the art to which the present disclosure pertains without departing from the spirit and scope of the present disclosure claimed in the following claims.

Claims

1. An air supply pipe comprising:an air supply pipe body configured to extend in a reference direction, the air supply pipe body having a flow passage formed therein; anda water receiver disposed in the flow passage and coupled to an inside of the air supply pipe body,wherein the air supply pipe body includes a support portion coupled to the water receiver at an end portion thereof configured to face the reference direction, the support portion being configured to surround an outer surface of the water receiver, andwherein the water receiver is spaced apart from an inner surface of the support portion at a certain interval to form a receiving space between the outer surface of the water receiver and the inner surface of the support portion in which water is accommodated.

2. The air supply pipe of claim 1, wherein the water receiver includes a coupling portion coupled to a coupling surface provided at the end portion of the support portion configured to face the reference direction and an extending portion configured to extend from the coupling portion in a direction opposite to the reference direction by a certain length.

3. The air supply pipe of claim 2, wherein the coupling portion is formed in a shape of a ring having an open interior, andwherein the extending portion extends from an inner periphery of the coupling portion.

4. The air supply pipe of claim 2, wherein the extending portion has a shape in which a diameter decreases in a direction in which the extending portion extends from the coupling portion.

5. The air supply pipe of claim 4, wherein the extending portion includes a first section configured to extend from the coupling portion at a first slope and a second section configured to extend from the first section at a second slope greater than the first slope.

6. The air supply pipe of claim 5, wherein a length by which the first section extends is shorter than a length by which the second section extends.

7. The air supply pipe of claim 2, wherein when a virtual plane perpendicular to the reference direction while connecting an end portion of the support portion configured to face the direction opposite to the reference direction and an outer surface of the extending portion is defined, the receiving space is a space surrounded by the outer surface of the extending portion, the inner surface of the support portion, and the virtual plane.

8. The air supply pipe of claim 2, wherein a reference volume of the receiving space is a value obtained by multiplying a limit weight calculated based on a bonding area of the coupling portion bonded to the coupling surface by a preset safety factor.

9. The air supply pipe of claim 1, wherein an air supply flue configured to supply outside air is coupled to the air supply pipe, andwherein an end portion of the water receiver configured to face a direction opposite to the reference direction has an outer diameter smaller than an inner diameter of the air supply flue.

10. The air supply pipe of claim 9, wherein the end portion of the water receiver configured to face the direction opposite to the reference direction is located inside the air supply flue.

11. The air supply pipe of claim 10, wherein an end portion of the air supply flue configured to face the reference direction is seated on the support portion.

12. The air supply pipe of claim 1, wherein the air supply pipe body includes a drain pipe having a drain passage formed therein to be fluidically connected with the receiving space, andwherein the water accommodated in the receiving space is discharged to an outside through the drain pipe.

13. The air supply pipe of claim 12, wherein the air supply pipe body further includes a pipe body having the flow passage and the support portion formed therein and open in a direction parallel to the reference direction and a flange configured to extend outward from an end portion of the pipe body configured to face the reference direction, andwherein the drain pipe extends from the pipe body such that the drain passage penetrates the support portion.

14. The air supply pipe of claim 13, wherein at least a portion of an inner surface of the pipe body protrudes inward along a circumferential direction to form the support portion.

15. The air supply pipe of claim 1, wherein based on an end portion of the air supply pipe body configured to face the reference direction, an end portion of the water receiver configured to face a direction opposite to the reference direction is located at a higher position than an end portion of the support portion configured to face the direction opposite to the reference direction.

16. An air heating apparatus comprising:a main body; andan air supply pipe to which an air supply flue is connected, the air supply pipe being coupled to the main body to supply air into the main body,wherein the air supply pipe includes:an air supply pipe body configured to extend in a reference direction, the air supply pipe body having a flow passage formed therein; anda water receiver disposed in the flow passage and coupled to an inside of the air supply pipe body,wherein the air supply pipe body includes a support portion coupled to the water receiver at an end portion thereof configured to face the reference direction, the support portion being configured to surround an outer surface of the water receiver, andwherein the water receiver is spaced apart from an inner surface of the support portion at a certain interval to form a receiving space between the outer surface of the water receiver and the inner surface of the support portion in which water is accommodated.

17. The air heating apparatus of claim 16, wherein the air supply pipe further includes at least one drain pipe having a drain passage formed therein to be fluidically connected with the receiving space,wherein the drain pipe is connected with a condensate trap through a pipe, the condensate trap being coupled to an outer surface of the main body, andwherein the water accommodated in the receiving space is discharged to the condensate trap through the drain pipe.

18. The air heating apparatus of claim 16, wherein an end portion of the water receiver configured to face a direction opposite to the reference direction has an outer diameter smaller than an inner diameter of the air supply flue.

19. The air heating apparatus of claim 16, wherein an end portion of the water receiver configured to face a direction opposite to the reference direction is located inside the air supply flue.

20. The air heating apparatus of claim 16, wherein based on an end portion of the air supply pipe body configured to face the reference direction, an end portion of the water receiver configured to face a direction opposite to the reference direction is located at a higher position than an end portion of the support portion configured to face the direction opposite to the reference direction.

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