Apparatus for generating hot and cold air

Abstract

A cold and hot air generating device according to the present invention disclosed comprises: a housing having a first chamber and a second chamber inside; a thermoelectric element having one side exposed to the first chamber and the other side exposed to the second chamber; a first temperature sensor for measuring the temperature of the thermoelectric element on the first chamber side; a second temperature sensor for measuring the temperature of the thermoelectric element on the second chamber side; a blower fan for supplying cold or hot air generated on the first chamber side by the operation of the thermoelectric element; an air supply path forming a path for the cold or hot air supplied from the blower fan; a bypass path branched from the air supply path and communicating with the second chamber; and a bypass valve for controlling the flow of air in the air supply path and the bypass path. The device generates cold or hot air by driving the thermoelectric element, receives a first temperature signal and a second temperature signal from the first temperature sensor and the second temperature sensor, respectively, and controls the bypass valve when the difference in temperature values ​​between the received first temperature signal and the second temperature signal exceeds a preset reference temperature value (TR). It includes a control unit that bypasses a portion of the cold or hot air and supplies it to the second chamber. Thus, when a thermoelectric element is continuously operated and the temperature difference between the two sides widens, a problem arises where thermal efficiency decreases and power consumption increases. This can solve the problem of not being able to actively control the performance degradation phenomenon unique to thermoelectric elements in the past.

Description

Technology Field

[0001] The present invention relates to a device for generating cold and hot air, and more specifically, to a device and method for generating cold and hot air that can provide a comfortable environment by cooling the air in summer and heating the air in winter to supply cold or warm air to a user. Background Technology

[0002] Typically, mats are placed on the floor or on a bed to support the body and provide comfort and relaxation during sleep or rest.

[0003] It is common practice to use these mats according to the season, such as electric heating devices or heated mats in the cold winter, and as a substitute for ventilation mats or cooling sheets in the hot summer.

[0004] However, since heated mats or hot water mats are used in winter and ventilated mats or cooling sheets are used in summer, there was the inconvenience of having to change the mats, and there was also inconvenience in storage.

[0006] To address this, a hot and cold air mat that emits warm air in winter and cold air in summer has been introduced, making it convenient for use throughout all four seasons.

[0007] In this case, thermoelectric elements (Peltier elements) are often used to generate hot or cold air because a single element can produce both hot and cold air simply by changing the direction of the current.

[0008] In other words, when current flows in one direction using the Peltier effect, one side of the thermoelectric element cools (absorbs heat) and the other side generates heat; however, if the direction of the current is reversed, the function of each side is reversed.

[0009] Due to these characteristics, it can rapidly switch between cold and hot air without using separate refrigerants (such as Freon gas), and its use is increasing because of its simple structure and eco-friendliness.

[0011] Accordingly, one side of the thermoelectric element is installed facing a chamber that communicates with a passage supplying air to the mat, and the other side is installed insulated from it; thus, in summer, one side of the thermoelectric element on the chamber side is cooled to cool the air inside the chamber, after which a blower fan is driven to supply cold air to the mat.

[0012] Subsequently, in winter, if the direction of the current is switched, one side of the thermoelectric element on the chamber side heats up, heating the air inside the chamber, and then the blower fan is driven to supply warm air to the mat side.

[0014] However, thermoelectric devices have a problem where their cooling efficiency decreases due to a structural limitation in which their cooling performance deteriorates as the temperature difference between one side and the other increases.

[0015] In other words, the amount of heat (Q) that can be absorbed from one side (cooling side) of the thermoelectric element c ) can be expressed by the following formula.

[0016]

[0018] Here, in Equation 1, ΔT in -K·ΔT is the temperature difference between the two sides of the thermoelectric element, and as this ΔT increases, the cooling capacity decreases linearly, and for every 10℃ increase in ΔT, the cooling capacity decreases by about 20~30%.

[0020]

[0022] In addition, it can be seen that the coefficient of performance (COP) in Equation 2 is sensitive to temperature differences, and when the temperature difference ΔT is high, for example at 40℃, the COP can drop sharply to less than 0.3.

[0024] Therefore, as the thermoelectric element continues to operate and the temperature difference between the two sides widens, a problem arises where thermal efficiency decreases and power consumption increases; however, conventionally, it has not been possible to actively control this performance degradation phenomenon unique to thermoelectric elements. Prior art literature

[0026] (Patent Document 0001) KR 10-2236741 Hot and cold air unit for B1 bed mattress The problem to be solved

[0027] The present invention was devised to solve the aforementioned problems, and aims to provide a device and method for generating cold and hot air that can provide a comfortable environment to the user by providing cold and hot air throughout the four seasons, while solving the problems of reduced cooling performance and increased power consumption of the thermoelectric element without the need for a separate cooling system to control the temperature difference between the two sides of the thermoelectric element. means of solving the problem

[0029] A device for generating cold or hot air according to a preferred embodiment of the present invention comprises: a housing having a first chamber and a second chamber inside; a thermoelectric element having one side exposed to the first chamber and the other side exposed to the second chamber; a first temperature sensor for measuring the temperature of the thermoelectric element on the first chamber side; a second temperature sensor for measuring the temperature of the thermoelectric element on the second chamber side; a blower fan for supplying cold or hot air generated on the first chamber side by the operation of the thermoelectric element; an air supply module including an air supply path forming a path for the cold or hot air supplied from the blower fan, a bypass path branched from the air supply path and communicating with the second chamber, and a bypass valve for controlling the flow of air in the air supply path and the bypass path; and a device for driving the thermoelectric element to generate cold or hot air, receiving a first temperature signal and a second temperature signal from the first temperature sensor and the second temperature sensor, respectively, and having a preset reference temperature value (T) for the difference between the temperature values ​​of the received first temperature signal and the second temperature signal. R It includes a control unit that controls the bypass valve to bypass a portion of the cold or hot air and supply it to the second chamber when the value exceeds ).

[0030] Thus, when a thermoelectric element is continuously operated and the temperature difference between the two sides widens, a problem arises where thermal efficiency decreases and power consumption increases. This can solve the problem of not being able to actively control the performance degradation phenomenon unique to thermoelectric elements in the past.

[0031] In addition, the problem of performance degradation of thermoelectric elements can be solved with a simple configuration without the need for the additional installation of a separate cooling device.

[0033] In addition, it is preferable that the first chamber and the second chamber be partitioned by an insulating partition.

[0034] Thus, by insulating the first chamber and the second chamber, heat exchange between chambers with a temperature difference is prevented, allowing cold or hot air of the intended temperature to be supplied.

[0036] In addition, it is preferable to further include a bypass fan that bypasses the bypassed cold or hot air to the second chamber.

[0037] Thus, cold or hot air is actively and rapidly supplied to the second chamber, allowing the temperature difference between the first chamber and the second chamber to be maintained within a certain range.

[0039] Meanwhile, a method for generating hot and cold air according to a preferred embodiment of the present invention comprises: a step of driving a thermoelectric element provided within a housing having mutually partitioned first chambers and second chambers, wherein one side of the thermoelectric element faces the first chamber and the other side faces the second chamber; a step of driving a blower fan that supplies air from the first chamber, which is heated or cooled by the thermoelectric element, to the outside; a temperature measurement step of measuring the temperature of the thermoelectric element on the first chamber side and the second chamber side; a temperature signal reception step of receiving a first temperature signal (T1) on the first chamber side and a second temperature signal (T2) on the second chamber side measured in the temperature measurement step; and a temperature difference (ΔT) between the first temperature signal (T1) and the second temperature signal (T2) received in the temperature signal reception step, wherein the temperature difference (ΔT) is a preset reference temperature value (T R A temperature comparison step for comparing ); a temperature difference (ΔT) between the first temperature signal (T1) and the second temperature signal (T2) compared in the temperature comparison step, and a preset reference temperature value (T R The method includes the step of controlling a bypass valve to guide a portion of the cold or hot air supplied by the blower fan into the second chamber when the amount exceeds ).

[0040] Thus, when a thermoelectric element is continuously operated and the temperature difference between the two sides widens, a problem arises where thermal efficiency decreases and power consumption increases. This can solve the problem of not being able to actively control the performance degradation phenomenon unique to thermoelectric elements in the past.

[0041] In addition, the problem of performance degradation of thermoelectric elements can be solved with a simple configuration without the need for the additional installation of a separate cooling device.

[0043] In addition, after the above cold or hot air is bypassed, the temperature difference (ΔT) between the first temperature signal (T1) and the second temperature signal (T2) is a preset reference temperature value (T R If the amount is less than ) it is desirable to control the bypass valve so that it does not flow into the second chamber.

[0044] Thus, cold or hot air can be supplied efficiently while preventing performance degradation of the thermoelectric element.

[0046] Additionally, it is preferable to further include the step of driving a bypass fan provided in the second chamber so that the bypassed cold or hot air is effectively guided into the second chamber.

[0047] As a result, it is possible to prevent the temperature difference between the two sides of the thermoelectric element from increasing more quickly and effectively, and to selectively control the time required to reduce the temperature difference. Effects of the invention

[0049] According to a preferred embodiment of the present invention, when a thermoelectric element is continuously operated and the temperature difference between the two sides widens, a problem arises in which thermal efficiency decreases and power consumption increases. This can solve the problem of not being able to actively control the performance degradation phenomenon unique to thermoelectric elements in the past.

[0050] In addition, the problem of performance degradation of thermoelectric elements can be solved with a simple configuration without the need for the additional installation of a separate cooling device.

[0052] In addition, since the first chamber and the second chamber are insulated, heat exchange between chambers with a temperature difference is prevented, allowing cold or hot air of the intended temperature to be supplied.

[0054] In addition, by doing so, cold or hot air can be actively and rapidly supplied to the second chamber, so that the temperature difference between the first chamber and the second chamber can be maintained within a certain range, and accordingly, cold or hot air can be efficiently supplied while preventing performance degradation of the thermoelectric element.

[0056] In addition, by controlling the opening and closing degree of the bypass valve and the speed of the bypass fan, it is possible to quickly and effectively prevent the temperature difference between both sides of the thermoelectric element from increasing, and to selectively control the time required to reduce the temperature difference. Brief explanation of the drawing

[0058] FIG. 1 is a drawing for explaining a hot and cold air generating device according to a preferred embodiment of the present invention, FIG. 2 is a drawing showing a hot and cold air ventilation mat on which the hot and cold air generating device shown in FIG. 1 is installed. FIG. 3 is a block diagram of the hot and cold air generating device shown in FIG. 1, Figure 4 is a flowchart illustrating the operation of the hot and cold air ventilation generating device shown in Figure 1. Specific details for implementing the invention

[0059] The above objects, other objects, features, and advantages of the present invention will be easily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete, and to ensure that the spirit of the present invention is sufficiently conveyed to those skilled in the art.

[0060] In this specification, when a component is described as being on another component, it means that it may be formed directly on the other component or that a third component may be interposed between them. Additionally, in the drawings, the thicknesses of the components may be exaggerated for the effective explanation of the technical content.

[0061] Where terms such as "first," "second," etc. are used in this specification to describe components, these components shall not be limited by such terms. These terms are used merely to distinguish one component from another. The embodiments described and illustrated herein also include their complementary embodiments.

[0062] Furthermore, when it is stated that the first element (or component) operates or is executed on (ON) the second element (or component), it should be understood that the first element (or component) operates or is executed in the environment where the second element (or component) operates or is executed, or that the second element (or component) operates or is executed through direct or indirect interaction.

[0063] Where any element, component, device, or system is described as including a component consisting of a program or software, it should be understood, even without explicit mention, that element, component, device, or system includes hardware (e.g., memory, CPU, etc.) or other programs or software (e.g., an operating system or drivers required to run the hardware) necessary for the execution or operation of the program or software.

[0064] Furthermore, unless otherwise specified regarding the implementation of any element (or component), it should be understood that the element (or component) may be implemented in software, hardware, or in any form that combines both software and hardware.

[0065] Furthermore, the terms used herein are for describing the embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used in this specification, 'comprises' and / or 'comprising' do not exclude the presence or addition of one or more other components to the mentioned components.

[0067] FIG. 1 is a drawing showing a hot and cold air generating device according to a preferred embodiment of the present invention, FIG. 2 is a drawing showing a hot and cold air ventilation mat equipped with the hot and cold air generating device shown in FIG. 1, and FIG. 3 is a block diagram of the hot and cold air generating device shown in FIG. 2.

[0069] Hereinafter, a hot and cold air generating device according to a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 3.

[0071] A hot and cold air generating device (110) according to a preferred embodiment of the present invention includes a housing (111), a thermoelectric element (113), a first temperature sensor (114a), a second temperature sensor (114b), a blower fan (115), an air supply module (118), an input unit (119a), a display unit (119b), and a control unit (117).

[0072] The housing (111) has a space in which a thermoelectric element (113), a first temperature sensor (114a), a second temperature sensor (114b), and a blower fan (115) are installed, and is provided with a first chamber (111a) and a second chamber (111b) partitioned by a partition wall (112).

[0073] At this time, the partition wall (112) is formed of an insulating material so that heat exchange between the first chamber (111a) and the second chamber (111b) does not occur, thereby preventing the temperature of the first chamber (111a) from being affected by the external temperature, i.e., the second chamber (111b), so that the intended cold or hot air can be generated and supplied.

[0074] A blower port (111d) is formed in the first chamber (111a) to supply air that has been cooled or heated within the first chamber (111a) to an external place of use, and a bypass port (111c) is formed in the second chamber (111b) to allow a portion of the cold or hot air generated in the first chamber (111a) to flow in.

[0075] At this time, although not shown in the first chamber (111a), an inlet for air to flow into the first chamber (111a) may be formed, and although not shown in the second chamber (111b), an outlet for air flowing into the second chamber (111b) to be discharged to the outside may be formed.

[0077] The thermoelectric element (113) absorbs heat on one side and releases heat on the other side when current is applied, and is installed in the partition wall (112) that separates the first chamber (111a) and the second chamber (111b). At this time, one side is installed so that it is exposed to the first chamber (111a) and the other side is exposed to the second chamber (111b), so that when current is applied, one side is cooled or heated, cooling or heating the air in the first chamber (111a), and conversely, the other side is heated or cooled.

[0079] In this way, since both cold and hot air can be generated by simply changing the direction of the current with a single element, it is desirable to use a thermoelectric element (113) to generate hot or cold air.

[0080] That is, when current flows in one direction using the Peltier effect, one side of the thermoelectric element (113) cools (absorbs heat) and the other side generates heat, but when the direction of the current is reversed, the function of each side is reversed.

[0081] Due to these characteristics, it can rapidly switch between cold and hot air without using separate refrigerants (such as Freon gas), and its use is increasing because of its simple structure and eco-friendliness.

[0083] The first temperature sensor (114a) measures the temperature of one side of the thermoelectric element (113) exposed to the first chamber (111a), and the second temperature sensor (114b) measures the temperature of the other side of the thermoelectric element (113) exposed to the second chamber (111b).

[0085] The blower fan (115) is installed in the air outlet (111d) formed in the housing (111) and supplies air cooled or heated in the first chamber (111a) to the air supply module (118) described later.

[0087] The air supply module (118) includes an air supply path (118a) that forms a path for cold or hot air supplied from a blower fan (115), a bypass path (118b) that branches off from the air supply path (118a) and communicates with a second chamber (111b), and a bypass valve (118c) that controls the flow of air in the air supply path (118a) and the bypass path (118b).

[0088] The air supply path (118a) supplies cooled or heated air supplied from the first chamber (111a) to the final destination, and is a path that supplies cool or hot air to, for example, a cooling / hot air mat, an indoor space, or the interior of a vehicle as shown in FIG. 2.

[0089] The bypass channel (118b) branches off from the air supply channel (118a) and communicates with the second chamber (111b), allowing cold or hot air to flow into the second chamber (118b) to cool or heat the air inside the second chamber (118b).

[0090] The bypass valve (118c) is controlled by the control unit (117) described later to allow air to flow only through the air supply path (118a) or to direct a portion of the air in the air supply path (118a) to the bypass path (118b).

[0092] The input unit (119a) is provided outside the housing (111) so that the user can set the operation settings, temperature settings, and cold or hot air modes, and the display unit (119b) displays information on the current operation status or temperature status.

[0094] The control unit (117) drives and controls the thermoelectric element (113), the first temperature sensor (114a), the second temperature sensor (114b), the blower fan (115), the bypass valve (118c), the input unit (119a), and the display unit (119b), and receives temperature signals (T1 and T2) of the first chamber (111a) and the second chamber (111b) of the thermoelectric element (113) measured by the first temperature sensor (114a) and the second temperature sensor (114b).

[0096] When current is applied to the thermoelectric element (113), the first chamber (111a) side is cooled or heated and the second chamber (111b) side is heated or cooled in the opposite way, thereby controlling the operation to cool or heat the air in the first chamber (111a) to generate cold or hot air, and controlling the operation to drive the blower fan (115) to supply the generated cold or hot air.

[0098] Additionally, the control unit (117) calculates the temperature difference (ΔT) between the temperature signals (T1 and T2) on the first chamber (111a) side and the second chamber (111b) side of the thermoelectric element (113), and the calculated temperature difference (ΔT) is a preset reference temperature value (T R If it is less than ), cold or hot air is continuously supplied to the place of use (mat, vehicle interior, interior) through the air supply path (118a), and the calculated temperature difference (ΔT) is less than the preset reference temperature value (T R If the amount exceeds ), the bypass valve (118c) is controlled to bypass a portion of the hot or cold air flowing through the air supply path (118a) to the bypass path (118b) so that it flows into the second chamber (111b).

[0100] At this time, according to a preferred embodiment of the present invention, a bypass fan (116) is installed in the bypass port (111c) of the second chamber (111b) so that the cold or hot air induced by the bypass valve (118c) can be more smoothly induced into the second chamber (111b).

[0102] When the temperature difference between the two sides of the thermoelectric element (113) increases due to the operation of the control unit (117), the thermal efficiency decreases, so the supply of cold or hot air is not smooth, and the problem of increased power consumption can be solved.

[0104] FIG. 2 is a drawing illustrating a cold and hot air ventilation mat (100) having a mat section (160) as an example of a place of use where cold or hot air is supplied through an air supply channel (118a).

[0105] The hot and cold air ventilation mat (100) includes a hot and cold air generating device (110), an air supply manifold (120), an air discharge section (130), and a mat section (160).

[0106] The air supply manifold (120) is connected to the air supply path (118a) of the cold and hot air generating device (110) and branches the supplied cold or hot air to be supplied to the mat section (160).

[0107] The air discharge unit (130) is provided with a plurality of (131)(132)...(139) connected to the air supply manifold (120), and a plurality of discharge holes (131a)(132a)...(139a) are formed in the air discharge unit (131)(132)...(139), so that cold or warm air is discharged through the discharge holes (131a)(132a)...(139a) to send cold or warm air to the user, thereby creating a comfortable environment.

[0108] The mat section (160) is supported with the air supply manifold (120) and air discharge section (130) provided inside and is formed of a porous material so that cold or hot air discharged from discharge holes (131a) (132a)... (139a) can effectively reach the user.

[0109] Preferably, this mat portion (160) is formed from any one of 3D air mesh, thermoplastic elastomer (TPE), polyethylene elastomer (POE), and TMEPUR foam.

[0111] By forming the mat portion (160) with such a material, breathability is ensured so that the discharged cold or warm air is effectively delivered to the user, and the air discharge portion (130) can be stably supported without being compressed or deformed by the user's weight.

[0113] Hereinafter, a method for generating hot and cold air according to a preferred embodiment of the present invention will be described with reference to FIG. 4.

[0114] First, when power is turned on at the input unit (119a) and a cold air or hot air mode is selected, the control unit (117) drives the thermoelectric element (113) according to the selected mode to drive the cold air or hot air mode (S410).

[0115] In the following, the explanation is based on the cold air mode, and the hot air mode is omitted as it is executed by switching the direction of current supply to the thermoelectric element (113).

[0117] When current is applied to the thermoelectric element (113) by the control unit (117), one side of the thermoelectric element (113) exposed to the first chamber (111a) is cooled and the other side of the thermoelectric element (113) exposed to the second chamber (111b) is heated.

[0119] At this time, the control unit (117) receives temperature signals (T1 and T2) from a first temperature sensor (114a) that measures the temperature of one side of the thermoelectric element (113) and a second temperature sensor (114b) that measures the temperature of the other side of the thermoelectric element (113).

[0120] Next, the control unit (117) calculates the temperature difference (ΔT) of the received temperature signals (T1 and T2) (S420), and the calculated temperature difference (ΔT) is a preset reference temperature value (T R Compares with )(S430).

[0121] In step S430, the temperature difference (ΔT) is the reference temperature value (T R If the amount is less than ) the cold air generated in the first chamber (111a) is continuously supplied to the mat section (160) through the air supply path (118a).

[0122] In step S430, the temperature difference (ΔT) is the reference temperature value (T R In the case where the amount exceeds ), the control unit (117) drives the bypass valve (118c) to direct a portion of the cold air generated in the first chamber (111a) to the second chamber (111b) to cool the interior of the second chamber (111b) that is being heated, thereby cooling the other side of the thermoelectric element (113) exposed to the second chamber (111b).

[0124] In this way, cold air is directed into the second chamber (111b) to cool the other side of the heated thermoelectric element (113), while the temperature difference (ΔT) and the reference temperature value (T R ) is compared a second time (S450), and the temperature difference (ΔT) is the reference temperature value (T R If it still exceeds ), continue to bypass the cold air.

[0125] Meanwhile, the temperature difference (ΔT) is the reference temperature value (T R In the case of ) or less, the control unit (117) drives the bypass valve (118c) to block the inflow of cold air into the bypass path (118b) and supplies all the cold air to the place of use through the air supply path (118a) so that it operates in cold air mode (normal mode) (S460).

[0127] More preferably, the control unit (117) can adjust the amount of cold air directed from the bypass valve (118c) to the bypass path (118b) to control the speed of cooling the other side of the thermoelectric element (113), thereby allowing for rapid cooling by sending more air or slow cooling by sending less air.

[0129] Although an embodiment of the present invention has been described above, those skilled in the art may modify and change the present invention in various ways by adding, changing, deleting, or adding components, etc., without departing from the spirit of the present invention as described in the claims, and such modifications and changes are also to be included within the scope of the rights of the present invention. Explanation of the symbols

[0130] 100: Hot and cold air ventilation mat 110: Hot and cold air generator 111: Housing 111a: First chamber 111b: Second chamber 110c: Bypass port 110d : Air vent 112 : Insulated bulkhead 113: Thermoelectric element 114a: First temperature sensor 114b : Second temperature sensor 115 : Blower fan 116 : Bypass fan 117 : Control unit 118: Air supply module 118a: Air supply Euro 118b: Bypass Euro 118c: Bypass Valve 119a : Input section 119b : Display section 120 : Air supply manifold 130, 131, 132 ... : Air discharge section 130a, 131a, 132a ... : Air discharge port

Claims

Claim 1 A housing having a first chamber and a second chamber inside; a thermoelectric element having one side exposed to the first chamber and the other side exposed to the second chamber; a first temperature sensor for measuring the temperature of the thermoelectric element on the first chamber side; a second temperature sensor for measuring the temperature of the thermoelectric element on the second chamber side; a blower fan for supplying cold or hot air generated on the first chamber side by the operation of the thermoelectric element; and an air supply module comprising an air supply path forming a path for the cold or hot air supplied from the blower fan, a bypass path branched from the air supply path and communicating with the second chamber, and a bypass valve for controlling the flow of air in the air supply path and the bypass path. and drive the thermoelectric element to generate cold air or hot air, receive a first temperature signal and a second temperature signal from a first temperature sensor and a second temperature sensor, respectively, and the temperature difference (ΔT) between the received first temperature signal (T1) and second temperature signal (T2) is a preset reference temperature value (T R A cold and hot air generating device comprising: a control unit that controls the bypass valve to bypass a portion of the cold or hot air and supply it to the second chamber when the value exceeds ). Claim 2 A hot and cold air generating device according to claim 1, wherein the first chamber and the second chamber are partitioned by an insulating partition. Claim 3 A cold and hot air generating device according to claim 1, characterized in that the second chamber is equipped with a bypass fan that bypasses the bypassed cold or hot air to the second chamber. Claim 4 A step of driving a thermoelectric element provided within a housing having mutually partitioned first chambers and second chambers, wherein one side faces the first chamber and the other side faces the second chamber; a step of driving a blower fan that supplies air from the first chamber, which is heated or cooled by the thermoelectric element, to the outside; a temperature measurement step of measuring the temperature of the thermoelectric element on the first chamber side and the second chamber side; a temperature signal reception step of receiving a first temperature signal (T1) on the first chamber side and a second temperature signal (T2) on the second chamber side measured in the temperature measurement step; and a pre-set reference temperature value (T) where the temperature difference (ΔT) between the first temperature signal (T1) and the second temperature signal (T2) received in the temperature signal reception step R A temperature comparison step for comparing ); a temperature difference (ΔT) between the first temperature signal (T1) and the second temperature signal (T2) compared in the temperature comparison step, and a preset reference temperature value (T R A method for generating cold and hot air, comprising the step of controlling a bypass valve to guide a portion of the cold or hot air supplied by the blower fan into the second chamber when the amount exceeds ). Claim 5 In paragraph 4, after the cold or hot air is bypassed, the temperature difference (ΔT) between the first temperature signal (T1) and the second temperature signal (T2) is a preset reference temperature value (T R A method for generating hot and cold air characterized by controlling a bypass valve so that it does not flow into the second chamber when the amount is less than or equal to ). Claim 6 A method for generating cold and hot air according to claim 5, further comprising the step of driving a bypass fan provided in the second chamber so that the bypassed cold or hot air is effectively guided into the second chamber.

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