Greek Yogurt Maker

Abstract

The present invention relates to a Greek yogurt manufacturing apparatus, and more specifically, proposes an apparatus capable of removing moisture or whey from semi-liquid foods such as yogurt, tofu, cheese, and soy milk coagulants within a short period of time to solidify them.

Description

Technology Field

[0001] The present invention relates to a Greek yogurt manufacturing apparatus, and more specifically, to an apparatus capable of removing moisture or whey from semi-liquid foods such as yogurt, tofu, cheese, and soy milk coagulants within a short period of time to solidify them. Background Technology

[0002] Conventionally, the production of Greek yogurt involved placing the yogurt into a pressurized container, waiting for natural drainage for a long time, and then applying pressure for an extended period using a pressing plate and a spring to remove the whey.

[0003] This process took a total of 20 to 30 hours or more, and the excessively long manufacturing time caused problems such as the possibility of food spoilage, hygiene issues, and the inconvenience of leaving it unattended for a long time. Additionally, there was a structural problem where the actual pressure was not transmitted because yogurt flowed back through the gaps in the pressing plate.

[0004] In addition, conventional Greek yogurt manufacturing devices had structural limitations, such as the problem of resource waste caused by the integrated strainer requiring the entire unit to be discarded if damaged or contaminated, the inability to remove the finished solid food while maintaining its original shape, and the difficulty in maintaining constant pressure. Prior art literature

[0005] Republic of Korea Registered Patent 10-2354087 (2022.01.20.) The problem to be solved

[0006] The objective of the present invention is to provide a Greek yogurt manufacturing device that enables substantial high pressure application by preventing semi-fluid food from flowing back through the gap in the pressing plate.

[0007] In addition, another objective of the present invention is to provide a Greek yogurt manufacturing device having a structure that enables hygienic and maintenance by allowing whey separation and dehydration to be performed within a short time rather than a long time.

[0008] In addition, another objective of the present invention is to provide a Greek yogurt manufacturing device having a structure capable of extracting a finished solid food without shape damage and implementing a constant and continuous pressure. means of solving the problem

[0009] A Greek yogurt manufacturing apparatus according to one aspect of the present invention for achieving the above objective comprises: a pressurized container for receiving a semi-fluid food; a pressure part disposed vertically inside the pressurized container to pressurize the semi-fluid food contained inside the pressurized container downward; an elastic housing coupled to the pressure part, which expands in outer diameter upon pressurization and adheres to the inner wall of the pressurized container; and a strainer detachably coupled to the lower side of the pressurized container; wherein the pressure part comprises a pressing plate coupled to the elastic housing to pressurize the semi-fluid food, and a pressure rod coupled to the pressing plate and disposed vertically so as to protrude upward from the upper side of the pressurized container; and wherein whey separation is achieved while preventing upward backflow of the semi-fluid food through the expansion of the outer diameter of the elastic housing upon pressurization.

[0010] In addition, in a Greek yogurt manufacturing device according to one aspect of the present invention, a lid is attached to the upper part of a pressurized container and a strainer is attached to the lower part; the lid and the strainer have a connecting part protruding from the inner side for connecting with the pressurized container, and the pressurized container has a guide groove for guiding the connection position of the connecting part and a seating groove for the connecting part to be seated after connection is completed, so that connection is easy and the connecting part can be stably fixed in a pressurized state.

[0011] In addition, in a Greek yogurt manufacturing device according to one aspect of the present invention, a multi-stage stopper is formed along the longitudinal direction of the pressure rod on the pressure rod, and the stopper is selectively coupled to a protrusion provided on the lid so that a constant pressure can be maintained.

[0012] In addition, in a Greek yogurt manufacturing device according to one aspect of the present invention, a spring may be provided inside the pressure rod of the pressure part so that the pressing plate presses the semi-fluid food at a set pressure.

[0013] In addition, in a Greek yogurt manufacturing device according to one aspect of the present invention, after pressurization is completed and the strainer is separated, the pressure rod is pressed downward so that the solidified food is automatically discharged downward.

[0014] In addition, in a Greek yogurt manufacturing device according to one aspect of the present invention, at least one protruding gripping part is formed at the bottom of the strainer to facilitate separation of the strainer.

[0015] In addition, in a Greek yogurt manufacturing device according to one aspect of the present invention, the elastic housing may be configured to have an inclined surface that expands in a radial direction so as to adhere to the inner wall of the pressurizing container when pressurized.

[0016] In addition, in a Greek yogurt manufacturing device according to one aspect of the present invention, the pressing plate is provided with a coupling portion to which the elastic housing is coupled; the coupling portion is inserted into and coupled to a coupling groove of the elastic housing, and the coupling groove is formed in a shape that surrounds the coupling portion so as to support the elastic housing so as not to detach when pressure is applied.

[0017] In addition, in a Greek yogurt manufacturing device according to one aspect of the present invention, a support member is formed in the center of the elastic housing and can be supported on the lower surface of the pressing plate so as to suppress deformation of the elastic housing when pressure is applied. Effects of the invention

[0018] According to the present invention, upward backflow is blocked due to an elastic housing whose outer diameter expands upon pressurization, thereby providing the effect of enabling high-pressure pressurization even in a semi-fluid state.

[0019] In addition, according to the present invention, the time required to manufacture conventional Greek yogurt can be significantly reduced, and hygienic management is facilitated by a replaceable strainer.

[0020] In addition, according to the present invention, the structure of the guide groove and the seating groove can prevent detachment during pressurization, and has the effect of maintaining a constant pressure according to user settings through the spring and the stopper.

[0021] In addition, according to the present invention, deformation of the pressure surface of the elastic housing can be prevented through the shape of the central support and the coupling portion of the elastic housing, and the adhesion force of the contact portion in contact with the pressure container can be improved.

[0022] In addition, according to the present invention, the solid food product has the effect of being able to be extracted while maintaining its original shape. Brief explanation of the drawing

[0023] FIG. 1 is a perspective view showing a Greek yogurt manufacturing apparatus according to the present invention. FIG. 2 is an exploded perspective view of a Greek yogurt manufacturing apparatus according to one embodiment of the present invention. FIG. 3 is an exploded bottom perspective view of a Greek yogurt manufacturing apparatus according to one embodiment of the present invention. FIG. 4 is a cross-sectional view showing a Greek yogurt manufacturing apparatus according to the present invention. FIG. 5 is a cross-sectional view showing the deformation state of the elastic housing of the Greek yogurt manufacturing device according to the present invention. FIGS. 6 and FIGS. 7 are cross-sectional views showing the deformation state of an elastic housing according to another embodiment of the present invention. FIG. 8 is an exploded perspective view of a Greek yogurt manufacturing apparatus according to another embodiment of the present invention. FIG. 9 is an exploded bottom perspective view of a Greek yogurt manufacturing apparatus according to another embodiment of the present invention. FIG. 10 is a drawing showing a strainer of a Greek yogurt manufacturing device according to the present invention. FIGS. 11 and FIGS. 12 are drawings showing various forms of an elastic housing according to the present invention. FIG. 13 is a cross-sectional perspective view showing a Greek yogurt manufacturing apparatus according to the present invention. FIGS. 14 and 15 are drawings showing a state in which a lid and a pressing part are combined in a Greek yogurt manufacturing device according to the present invention, and pressure is set and mounted by a stopper. Specific details for implementing the invention

[0024] A preferred embodiment according to the present invention will be described in detail below with reference to the attached drawings.

[0025] The advantages and features of the present invention and the method for achieving them will become clear by referring to the embodiments described in detail below together with the accompanying drawings.

[0026] However, the present invention is not limited by the embodiments disclosed below but may be implemented in various different forms, and these embodiments are provided merely to make the disclosure of the present invention complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0027] In addition, in describing the present invention, if it is determined that related known technologies, etc., may obscure the essence of the present invention, a detailed explanation thereof will be omitted.

[0028] Referring to FIGS. 1 to 7, the Greek yogurt manufacturing apparatus (10) according to the present invention is a Greek yogurt manufacturing apparatus for removing whey from a semi-liquid food, and may include a pressurizing container (100) capable of receiving a semi-liquid food, a pressure part (150) that is vertically movable inside the pressurizing container (100) and pressurizes the semi-liquid food (not shown) received inside the pressurizing container (100) downward, an elastic housing (151) that is coupled to the pressure part (150) and expands its outer diameter when pressurized and adheres to the inner wall of the pressurizing container (100), and a filter screen (110) that is detachably coupled to the lower side of the pressurizing container (100).

[0029] The pressure section (150) includes a pressing plate (152) that pressurizes a semi-fluid food by being combined with an elastic housing (151), and a pressure rod (155) that is connected to the pressing plate (152) and protrudes upward from the upper side of the pressure container (100) and is positioned to be vertically movable, and is characterized in that when pressurized, the contact portions (151a, 151d) are in close contact with the inner surface of the pressure container (100) by the expansion of the outer diameter of the elastic housing (151), thereby preventing upward backflow of the semi-fluid food and enabling whey separation.

[0030] As illustrated in FIG. 4, the contact portion (151a, 151d) may be configured to have two contact sections, a first contact portion (151a) and a second contact portion (151d), and may also be configured to have a single contact section, of course.

[0031] Additionally, the elastic housing (151) may be provided with a contact portion (151d) that expands radially and comes into close contact with the pressurizing container (100) when pressurizing the semi-fluid food, and an inclined surface (151e) that allows downward pressurization while preventing upward backflow of the semi-fluid food.

[0032] Accordingly, in this embodiment, the second contact portion (151d) is the main contact portion, and when pressure is applied to the semi-fluid food introduced into the pressure container (100) while contacting the elastic housing (151), the outer diameter of the elastic housing becomes more closely attached to the inner wall of the pressure container (100), thereby preventing the semi-fluid food from flowing back and enabling the application of constant pressure.

[0033] The Greek yogurt manufacturing apparatus according to the present invention is characterized by being usable to separate whey from semi-liquid food or to remove moisture from food.

[0034] Additionally, a lid (120) is attached to the upper part of the pressure container (100), and a filter screen (110) is attached to the lower part. A connecting part (110a, 125b) that is connected to the pressure container is formed protrudingly on the inner side of the filter screen (110) and the lid, respectively. The pressure container (100) has a guide groove (101, 102) that guides the connection position of the connecting part (110a, 125b) and a seating groove (101a, 102a) that is seated after the connection is completed, so that the connection is easy to make and can be stably fixed in a pressure state.

[0035] That is, the guide groove (101) formed on the lower outer surface of the pressure container (100) facilitates the connection of the connecting part (110a) provided in the filter screen (110), and the connecting part (110a) is seated in the seating groove (101a) so that it can be stably fixed in a pressure state.

[0036] In addition, the guide groove (102) formed on the upper outer surface of the pressure container (100) facilitates the connection of the coupling part (125b) provided on the lid (120), and the coupling part (125b) is seated in the seating groove (102a) so that it can be stably fixed in a pressure state.

[0037] In addition, the pressure rod (155) of the pressure part (150) has a multi-stage stopper (155a) formed along the length direction of the pressure rod (155), and the stopper (155a) is selectively coupled to a projection (125a) provided on the lid (120) to maintain a constant pressure.

[0038] Additionally, a spring (153) is provided inside the pressure rod (155) of the pressure section (150) so that the pressing plate (152) pressurizes the semi-fluid food at a set pressure.

[0039] In addition, according to the present invention, the structure of the guide groove and the seating groove can prevent detachment during pressurization, and has the effect of maintaining a constant pressure according to user settings through the spring and the stopper.

[0040] In other words, it can maintain continuous and constant downward pressure through spring force, and since the pressure can be immediately released via rotational movement upon release, it is convenient to use as the user does not need to continuously apply force, and it has the effect of maintaining a constant pressure without the pressure changing depending on the user's pressing time.

[0041] Referring to FIG. 5, FIG. 5(a) shows the state of the elastic housing (151) before pressurizing the semi-fluid food, and FIG. 5(b) shows the state of the elastic housing (151) when pressurizing the semi-fluid food.

[0042] FIG. 5(a) shows a state in which the elastic housing (151) does not pressurize the semi-fluid food, so that the contact portions (151a, 151d) of the elastic housing (151) are not in close contact with the inner wall of the pressurizing container (100) and can move up and down, and FIG. 5(b) shows a state in which the elastic housing (151) pressurizes the semi-fluid food, so that the outer diameter of the elastic housing (151) expands and the contact portions (151a, 151d) are in close contact with the inner wall of the pressurizing container (100), thereby preventing upward backflow of the semi-fluid food and enabling whey separation.

[0043] Additionally, the pressing plate (152) is provided with a coupling part (152b) to which the elastic housing (151) is coupled, and the coupling part (152b) is inserted into the coupling groove (151f) of the elastic housing (151) to be coupled, and the coupling groove (151f) is formed in a shape that surrounds the coupling part (152b) so that the elastic housing (151) can be supported so as not to detach when pressure is applied.

[0044] FIGS. 6 and FIGS. 7 are drawings showing an elastic housing according to another embodiment of the present invention, FIG. 6 shows the state of the elastic housing (151) before pressurizing the semi-fluid food, and FIG. 7 shows the state of the semi-fluid food when pressurized.

[0045] FIG. 8 shows a state in which the elastic housing (151) does not pressurize the semi-fluid food, so that the contact portion (151a) of the elastic housing (151) is not in close contact with the inner wall of the pressurizing container (100) and can move up and down, and FIG. 9 shows a state in which the elastic housing (151) pressurizes the semi-fluid food, so that the outer diameter of the elastic housing (151) expands and the contact portion (151a) is in close contact with the inner wall of the pressurizing container (100), thereby preventing upward backflow of the semi-fluid food and enabling whey separation.

[0046] Additionally, the elastic housing (151) may be coupled to the pressing plate (152) of the pressure part (150), and more specifically, the coupling projection (151b) of the elastic housing (151) may be inserted into and coupled to the coupling part (152b) formed on the pressing plate (152), and the elastic housing (151) may be provided with a contact part (151a) that is in close contact with the pressure container (100) on its outer surface.

[0047] Additionally, the compression rod (155) may be provided with a mounting portion (157) to which a spring (153) is coupled and mounted, and the pressing plate (152) may be provided with a mounting portion (156) to which a spring (152) is coupled and mounted.

[0048] Additionally, the pressing plate (152) may be configured such that a cover portion (154) can be detachably attached to the upper side to allow for maintenance of the spring (153).

[0049] At this time, the cover portion (154) may be provided with a coupling groove (154a) to facilitate coupling with the pressing plate (152), and the pressing plate (152) may be provided with a coupling portion (151a).

[0050] In addition, after pressurization is completed, the filter screen (110) is separated and the pressure rod (155) is pressed downward so that the solidified food can be automatically discharged downward, thereby having the effect of allowing the solidified food to be discharged while maintaining its original shape.

[0051] That is, after pressurization is completed through the lower discharge type finished product extraction structure, the filter screen (110) is separated and the pressure rod (155) is pushed downward, thereby allowing the finished solid food to be ejected while maintaining its original shape through the pressing plate (152) pushing downward, and providing an effect that enables food design and processing.

[0052] Therefore, the problem of the shape being destroyed because it must be turned inside out to shake it out can be solved.

[0053] In addition, at least one protruding gripping part (115) is formed at the bottom of the filter screen (110) to facilitate separation of the filter screen (110).

[0054] This allows the filter screen (110) to be replaced immediately when contaminated, partially replaced when damaged, solve hygiene problems, and extend the lifespan of the device.

[0055] Additionally, a support member (151c) is formed in the center of the elastic housing (151) so that it is spaced apart from the pressing plate (152) before pressurization, allowing the elastic housing (151) to easily move up and down inside the pressurization container (100) before the outer diameter of the elastic housing (151) expands. When pressurized, the support member (151c) is supported by the pressing plate (152) so that the outer diameter of the pressurized surface of the elastic housing (151) expands while suppressing deformation, thereby improving the adhesion force of the contact member (151a) that contacts the pressurization container (100).

[0056] That is, when a semi-fluid food is pressurized through a pressing plate (152) equipped with an outer diameter expanding elastic housing (151), the semi-fluid food adheres to the bottom surface of the elastic housing (151), causing the curved bottom surface to flatten out, and accordingly, the outer diameter of the housing expands and adheres to the entire inner wall of the pressurizing container (100).

[0057] By this, semi-liquid food cannot flow back through the gap of the pressing plate (152), high pressure can be applied even in a semi-liquid state, and forced discharge of whey / moisture is possible within a short time.

[0058] Additionally, the Greek yogurt manufacturing apparatus according to the present invention can be used to separate whey from semi-liquid food or to remove moisture from food, and as shown in FIGS. 9 and 10, the strainer (131) allows for the selection of optimal whey removal conditions or dehydration conditions depending on the viscosity or particle state of the semi-liquid food or food.

[0059] That is, as shown in FIG. 11, at least one of the diameter, number, shape, and spacing of the filter holes (111, 131) may be formed differently from each other and may be provided in multiple types, and the user may select and replace a suitable filter mesh according to the viscosity, particle size, or concentration of the semi-fluid food or food to be pressurized.

[0060] FIGS. 12 and FIGS. 13 are drawings showing various forms of an elastic housing according to the present invention.

[0061] FIG. 12(a) shows an embodiment in which the elastic housing (151) has contact surfaces (151a, 151d) and inclined surfaces (151e), and FIG. 12(b) shows that the elastic housing (158) is coupled to the pressing plate (152) in a ring shape and formed so that the pressure container (100) is in close contact.

[0062] In FIG. 13, FIG. 13(a) shows an elastic housing (151) in a state before pressurizing a semi-fluid food, and FIG. 13(b) shows an elastic housing (151) in a state where the semi-fluid food is pressurized.

[0063] That is, a support portion (151c) is formed in the elastic housing (151) so that when pressure is applied, the support portion (151c) is supported by the pressing plate (152) to suppress deformation in which the pressure surface of the elastic housing (151) (the surface where the elastic housing contacts and presses the semi-fluid food) bends inward, thereby maintaining an expanded outer diameter state, so as to improve the adhesion force of the contact portion (151a) that contacts the pressure container (100).

[0064] FIG. 14 is a cross-sectional perspective view showing a Greek yogurt manufacturing apparatus according to the present invention, and it is obvious that in addition to separating whey from semi-liquid foods, it can be used as a pressurized dehydration apparatus for removing moisture from food.

[0065] Accordingly, according to the present invention, the device may include a pressure container (100), a pressure part (150) positioned vertically within the pressure container (100) to pressurize food contained within the pressure container (100) downward, an elastic housing (151) coupled to the pressure part (150) and having its outer diameter expanded upon pressurization and adhering to the inner wall of the pressure container, and a filter screen (110) detachably coupled to the lower side of the pressure container (100).

[0066] The pressure section (150) may include a pressing plate (152) that pressurizes food by being coupled with an elastic housing (151), and a pressure rod (155) that is connected by being coupled with the pressing plate (152) and protrudes upward from the upper side of the pressure container (100) so as to be vertically movable.

[0067] It is characterized by preventing upward backflow of food and removing moisture through the expansion of the outer diameter of the elastic housing (151) when pressurized.

[0068] FIGS. 15 and 16 are drawings showing a state in which a lid and a pressing part are combined in a Greek yogurt manufacturing device according to the present invention, and pressure is set and mounted by a stopper.

[0069] FIG. 15 shows that the lid (120) is provided with a through hole (129) so that a pressure rod (155) can be inserted, and the pressure rod (155) can be positioned to be raised and lowered through the through hole (129).

[0070] Additionally, at least one projection (125a) may be formed protruding from the inner surface where the through hole (129) formed in the lid (120) is formed, and the projection (125a) may be optionally coupled to a multi-stage stopper (155a) formed in the pressure rod (155).

[0071] FIG. 16(a) shows a stopper (155a) connected to one of the multiple stoppers (155a) to apply pressure according to user selection and maintain a constant pressure, FIG. 16(b) shows a stopper (155a) connected to a position that applies maximum pressure according to user selection and maintains maximum pressure.

[0072] Accordingly, according to the present invention, upward backflow is blocked due to an elastic housing whose outer diameter expands upon pressurization, thereby providing the effect of enabling high-pressure pressurization even in a semi-fluid state.

[0073] In addition, according to the present invention, the time required to manufacture conventional Greek yogurt can be significantly reduced, and hygienic management is facilitated by a replaceable strainer.

[0074] In addition, according to the present invention, the structure of the guide groove and the seating groove can prevent detachment during pressurization, and has the effect of maintaining a constant pressure according to user settings through the spring and the stopper.

[0075] In addition, according to the present invention, deformation of the pressure surface of the elastic housing can be prevented through the shape of the central support and the coupling portion of the elastic housing, and the adhesion force of the contact portion in contact with the pressure container can be improved.

[0076] In addition, according to the present invention, the solid food product has the effect of being able to be extracted while maintaining its original shape.

[0077] Although specific embodiments of the Greek yogurt manufacturing apparatus according to the present invention have been described so far, it is obvious that various modifications are possible within the scope of the present invention.

[0078] Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof.

[0079] That is, the aforementioned embodiments should be understood as exemplary in all respects and not limiting, and the scope of the invention is defined by the claims set forth below rather than by the detailed description, and all modifications or variations derived from the meaning and scope of the claims and their equivalents should be interpreted as being included within the scope of the invention. Explanation of the symbols

[0080] 10: Greek yogurt maker 100: Pressurized cylinder 101: Guide Home 101a: Seating groove 110: Strainer 110a: Joint 115: Pajibu 120: Lid 125a: protrusion 150: Pressure section 151: Elastic housing 151a: Contact part 151b: Connecting projection 151c: Support 151d: Contact part 151e: Slope 151f: Connecting groove 152: Pressing plate 152b: Joint 153: Spring 155: Pressure rod 155a: Stopper

Claims

Claim 1 A Greek yogurt manufacturing apparatus for removing whey from semi-liquid food, comprising: a pressurized container for receiving semi-liquid food; a pressure part disposed vertically inside the pressurized container to pressurize the semi-liquid food contained inside the pressurized container downward; an elastic housing coupled to the pressure part and expanding its outer diameter upon pressurization and adhering to the inner wall of the pressurized container; and a filter screen detachably coupled to the lower side of the pressurized container; wherein the elastic housing is configured to have an inclined surface that expands in a radial direction so as to adhere to the inner wall of the pressurized container upon pressurization; and wherein the pressure part comprises a pressing plate coupled to the elastic housing to pressurize the semi-liquid food, and a pressure rod coupled to the pressing plate and protruding upwardly from the upper side of the pressurized container and disposed vertically; wherein whey separation is achieved while preventing upward backflow of the semi-liquid food through the expansion of the outer diameter of the elastic housing upon pressurization. Claim 2 A Greek yogurt manufacturing apparatus according to claim 1, wherein a lid is attached to the upper part of a pressurized container and a strainer is attached to the lower part; wherein the lid and the strainer have a protruding connecting part formed on the inner side for connecting with the pressurized container, and the pressurized container has a guide groove for guiding the connecting position of the connecting part and a seating groove for the connecting part to be seated after the connecting is completed, so as to facilitate connecting and allow for stable fixation in a pressurized state. Claim 3 A Greek yogurt manufacturing apparatus according to claim 1, characterized in that a multi-stage stopper is formed along the longitudinal direction of the pressure rod, and the stopper is selectively coupled to a projection provided on the lid to maintain a constant pressure. Claim 4 A Greek yogurt manufacturing apparatus according to claim 3, wherein a spring is provided inside the pressure rod of the pressure part and configured so that a pressing plate presses a semi-fluid food at a set pressure. Claim 5 A Greek yogurt manufacturing apparatus according to claim 1, wherein, after pressurization is completed, the filter screen is separated and the pressure rod is pressed downward so that the solidified food is automatically discharged downward. Claim 6 A Greek yogurt manufacturing apparatus according to claim 1, wherein at least one protruding gripping portion is formed at the bottom of the strainer to facilitate separation of the strainer. Claim 7 delete Claim 8 A Greek yogurt manufacturing device for removing whey from a semi-liquid food, comprising: a pressurized container for receiving the semi-liquid food; a pressure part disposed vertically within the pressurized container to pressurize the semi-liquid food received within the pressurized container downward; and an elastic housing coupled to the pressure part, which expands in outer diameter upon pressurization and adheres to the inner wall of the pressurized container. Greek yogurt manufacturing apparatus comprising: a filter screen detachably coupled to the lower side of a pressure container; wherein the pressure portion comprises a pressing plate coupled to the elastic housing to pressurize a semi-fluid food, and a pressure rod coupled to the pressing plate and connected to it, protruding upward from the upper side of the pressure container and positioned to be vertically movable; wherein, when pressurized, whey separation is achieved while preventing upward backflow of the semi-fluid food by expanding the outer diameter of the elastic housing; wherein the pressing plate is provided with a coupling portion to which the elastic housing is coupled; wherein the coupling portion is inserted into and coupled to a coupling groove of the elastic housing, and the coupling groove is formed in a shape that surrounds the coupling portion to support the elastic housing so as not to detach when pressurized. Claim 9 Greek yogurt manufacturing apparatus for removing whey from semi-liquid food, comprising: a pressurized container for receiving semi-liquid food; a pressure part disposed vertically inside the pressurized container to pressurize the semi-liquid food contained inside the pressurized container downward; an elastic housing coupled to the pressure part and expanding its outer diameter upon pressurization and adhering to the inner wall of the pressurized container; and a filter screen detachably coupled to the lower side of the pressurized container; wherein the pressure part comprises a pressing plate coupled to the elastic housing to pressurize the semi-liquid food, and a pressure rod coupled to the pressing plate and protruding upwardly from the upper side of the pressurized container to be vertically movable; wherein whey separation is achieved while preventing upward backflow of the semi-liquid food by the expansion of the outer diameter of the elastic housing upon pressurization; and wherein a support part is formed in the center of the elastic housing and, upon pressurization, is supported on the lower surface of the pressing plate so as to suppress deformation of the elastic housing.

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