Heat resistance test device equipped with absorber tank

Abstract

The present invention comprises: a first fluid path (1000) sequentially circulating a first compressor (1), a first oil separator (2), a first condenser (3), a first solenoid valve (4), a first filter dryer (5), a first expansion valve (6), a heat exchanger (7), and the first compressor (1); a second fluid path (3000) sequentially circulating a second compressor (30), a second oil separator (31), a second condenser (32), a second filter dryer (33), the heat exchanger (7), a main solenoid valve (34), a main expansion valve (35), an evaporator (36), and the second compressor (30); a first digital pressure switch (9) provided to control the first compressor (1); a second digital pressure switch (40) provided to control the second compressor; and two or more pressure tanks provided on the second fluid path (3000). The apparatus comprises two or more auxiliary tanks for maintaining a constant pressure of the refrigerant flowing into the shock absorber tank; wherein the auxiliary tanks are composed of a pressurizing member that operates by being pressurized according to the pressure of the refrigerant flowing into the shock absorber tank, and are composed of an elastic member that elastically supports the pressurizing member.

Description

Technology Field

[0001] The present invention relates to a heat resistance testing device equipped with a shock absorber tank, and more specifically, to a heat resistance testing device equipped with a shock absorber tank that forms an ultra-low temperature by linking two refrigeration cycles constituting dual refrigeration, and is capable of stable operation of the device by providing a plurality of auxiliary tanks capable of buffering the pressure when it rises above a preset pressure in the shock absorber tank. Background Technology

[0002] A refrigerator refers to a device that reduces the temperature of one side by removing heat from one side and transferring it to the other side. Such a refrigerator may generally be configured to include a compressor, a condenser, a receiver, an expansion valve, and an evaporator.

[0003] The compressor compresses the low-temperature, low-pressure gaseous refrigerant supplied from the evaporator to a high-temperature, high-pressure state and delivers it to the condenser. The condenser condenses the high-temperature, high-pressure gaseous refrigerant compressed by the compressor into a liquid refrigerant through heat exchange with external air or water and delivers it to the receiver. The receiver temporarily stores the liquid refrigerant condensed to a high temperature, high pressure state in the condenser. The expansion valve rapidly expands the high-temperature, high-pressure liquid refrigerant supplied from the receiver to deliver a low-temperature, low-pressure refrigerant to the evaporator. The evaporator extracts heat from the low-temperature, low-pressure refrigerant supplied by the expansion valve through heat exchange with a heat exchange medium, such as external air or water, causing it to evaporate to generate a low-temperature, low-pressure gaseous refrigerant, which is then delivered to the compressor.

[0004] However, as the above-mentioned refrigerator is operated by a single refrigeration cycle, there are limitations in cooling the temperature of the one side to an ultra-low temperature, for example, minus 50°C or lower. To solve this problem, dual refrigeration cycle systems are mainly used recently. The above-mentioned dual refrigeration cycle system refers to a device capable of cooling to an ultra-low temperature in the low-temperature refrigeration cycle by linking a low-temperature refrigeration cycle and a high-temperature refrigeration cycle to exchange heat.

[0005] The dual refrigeration system described above is generally composed of a high-temperature cycle section and a low-temperature cycle section. The high-temperature cycle section includes a compressor that compresses gaseous refrigerant, a condenser that condenses the refrigerant compressed by the compressor by dissipating heat, an expansion valve that lowers the pressure of the liquid refrigerant condensed in the condenser, and an evaporator that generates cold air by evaporating the refrigerant, which has been lowered to low temperature and pressure through the aforementioned components, internally. Furthermore, this high-temperature cycle section has refrigerant temperature characteristics nearly identical to those of a general refrigeration cycle, and while the evaporator maintains a low temperature state, it has a relatively higher temperature compared to the evaporator of the low-temperature cycle section described later.

[0006] The low-temperature cycle section comprises a compressor that compresses the refrigerant in a gaseous state, a condenser that condenses the compressed refrigerant, an expansion valve that lowers the pressure of the condensed refrigerant, and an evaporator for performing heat exchange using the low-temperature, low-pressure refrigerant. Here, the evaporator of the low-temperature cycle section must maintain a temperature even lower than that required to form the ultra-low temperature (e.g., -60 to -70°C or lower) required in the refrigeration space.

[0007] In such dual-stage refrigeration systems, it is important to what extent the evaporator in the low-temperature cycle section can lower the temperature, and there is an urgent need for a refrigeration system configuration that can lower the temperature more efficiently. Prior art literature

[0008] Republic of Korea Registered Patent No. 10-1649193 The problem to be solved

[0009] The present invention was developed to solve the above-mentioned problems, and its purpose is to provide a heat resistance testing device equipped with a shock absorber tank that forms ultra-low temperatures by linking two refrigeration cycles, and is capable of stable device operation by providing a plurality of auxiliary tanks capable of buffering when the pressure rises above a preset pressure in the shock absorber tank. means of solving the problem

[0010] The present invention for achieving the above-mentioned technical problem comprises: a first compressor (1), a first oil separator (2), a first condenser (3), a first solenoid valve (4), a first filter dryer (5), a first expansion valve (6), a heat exchanger (7), and a first flow path (1000) that sequentially circulates through the first compressor (1); a second compressor (30), a second oil separator (31), a second condenser (32), a second filter dryer (33), the heat exchanger (7), a main solenoid valve (34), a main expansion valve (35), an evaporator (36), and a second flow path (3000) that sequentially circulates through the second compressor (30); a first digital pressure switch (9) provided to control the first compressor (1); a second digital pressure switch (40) provided to control the second compressor; and two or more shock absorber tanks provided on the second flow path (3000). The apparatus comprises two or more auxiliary tanks for maintaining a constant pressure of the refrigerant flowing into the shock absorber tank; wherein the auxiliary tanks are composed of a pressurizing member that operates by being pressurized according to the pressure of the refrigerant flowing into the shock absorber tank, and are composed of an elastic member that elastically supports the pressurizing member.

[0011] In one embodiment, the auxiliary tank comprises: a housing having a certain space formed inside; a first pressure member that contacts the inner wall surface and edge of the housing, moves up and down, has a first insert member protruding from the center of the lower surface, and has two or more pressure bars protruding from the edge area of ​​the lower surface; a first guide that guides the first insert member from the outside; a first spring provided on the outside of the first insert member and the first guide, with its upper end contacting the center of the lower surface of the first pressure member and its lower end contacting the bottom surface of the housing; a second pressure member provided on the lower part of the first pressure member, which is pressed by the pressure bar when the first pressure member descends, and has a central hole formed in its center through which the first insert member and the first guide can pass; two or more second insert members protruding from the edge area of ​​the second pressure member; and a second guide that guides the second insert member from the outside. It includes a second spring provided on the outer side of the second insertion member and the second guide, wherein the upper part contacts the lower surface of the first pressure member and the lower part contacts the bottom surface of the housing.

[0012] In one embodiment, the first oil return valve (8) is further included in a return path connecting the first oil separator (2) and the first compressor (1), and the second oil return valve (39) is further included in a return path connecting the second oil separator (31) and the second compressor (30).

[0013] In one embodiment, the shock absorber tank is characterized by being a vertical type tank with a hollow structure having a cylindrical shape, with two tanks installed in parallel, and connected to the second flow path by a capillary tube with a diameter of 1 to 3 mm. Effects of the invention

[0014] According to the heat resistance test device equipped with the shock absorber tank of the present invention, when the secondary side compressor is started in dual refrigeration, it prevents the pressure from rising above normal pressure, and even if abnormal pressure occurs, the auxiliary tanks absorb such abnormal pressure, thereby fundamentally preventing the compressor from being damaged or broken. Furthermore, when the temperature drops to ultra-low, it replenishes the insufficient refrigerant in the second path, thereby enabling stable operation of the device.

[0015] In addition, since stable operation of the device is possible through the auxiliary tank, it not only extends the lifespan of the device but also has the effect of further improving the heat exchange efficiency of the circulating refrigerant while minimizing temperature drop and pressure difference. Brief explanation of the drawing

[0016] FIG. 1 is a schematic diagram showing the structure of a heat resistance test device equipped with the shock absorber tank of the present invention. Figure 2 is a schematic cross-sectional view of the shock absorber of Figure 1. Figure 3 is an exploded perspective view to explain the coupling relationship of the shock absorber of Figure 2. FIG. 4 is a drawing for explaining the operating state of the shock absorber of a heat resistance test device equipped with the shock absorber tank of the present invention. Specific details for implementing the invention

[0017] The following detailed description of preferred embodiments of the present invention will be explained with reference to the accompanying drawings. It should be noted that identical components in the drawings are denoted by the same reference numerals wherever possible. Specific details are provided in the following description to aid in a more comprehensive understanding of the present invention. Furthermore, in describing the present invention, detailed descriptions of related known functions or components are omitted if it is determined that such detailed descriptions would unnecessarily obscure the essence of the invention.

[0018] The terms used in this specification have been selected to be as widely used as possible, taking into account their functions in the present invention; however, these terms may vary depending on the intent of those skilled in the art to which the present invention pertains, case law, the emergence of new technologies, etc. Additionally, in specific cases, terms have been arbitrarily selected by the applicant, and in such cases, their meanings will be described in detail in the relevant description section of the present invention. Therefore, terms used in this specification should be defined not merely by their names, but based on their meanings and the content throughout this specification.

[0019] Terms such as "first" or "second" may be used to describe various components, but said components should not be limited by said terms. For the sole purpose of distinguishing one component from another, for example, without departing from the scope of rights according to the concept of the present invention, the first component may be named the second component and similarly the second component may be named the first component.

[0020] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. Conversely, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions describing the relationships between components, such as "between" and "exactly between," or "adjacent to" and "directly adjacent to," should be interpreted in the same way.

[0021] The terms used herein are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described herein, and should not be understood as precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0022] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification.

[0023] Hereinafter, a heat resistance testing device equipped with an absorber tank of the present invention will be described in detail by explaining a preferred embodiment of the present invention with reference to the attached drawings.

[0024] FIG. 1 is a schematic diagram showing the structure of a heat resistance test device equipped with the shock absorber tank of the present invention, FIG. 2 is a cross-sectional view schematically showing the shock absorber of FIG. 1, and FIG. 3 is an exploded perspective view to explain the coupling relationship of the shock absorber of FIG. 2.

[0025] Referring to FIG. 1, the heat resistance test device (100) equipped with a shock absorber tank according to the present invention comprises a first flow path (10) circulating through a heat exchanger (7), a second flow path (3000) circulating through a heat exchanger (7), a first digital pressure switch (9), a second digital pressure switch (40), and a shock absorber tank (70).

[0026] The first path (P1) is a path that sequentially circulates through the first compressor (1), the first oil separator (2), the first condenser (3), the first solenoid valve (4), the first filter dryer (5), the first expansion valve (6), the heat exchanger (7), and the first compressor (1).

[0027] In order for the oil separated and filled in the first oil separator (2) to be returned to the first compressor (1), the first oil separator (2) and the first compressor (1) are connected by a return path (not numbered). Additionally, a first oil return valve (8) is interposed in the return path connecting the first oil separator (2) and the first compressor (1).

[0028] The second path (P2) is a path that sequentially circulates through the second compressor (30), the second oil separator (31), the second condenser (32), the second filter dryer (33), the heat exchanger (7), the main solenoid valve (34), the main expansion valve (35), the evaporator (36), and the second compressor (30).

[0029] Here, the second oil separator (31) and the second compressor (30) are connected by a return path (not numbered) so that the oil separated and filled in the second oil separator (31) is returned to the second compressor (30). Additionally, a second oil return valve (39) is interposed in the return path connecting the second oil separator (31) and the second compressor (30).

[0030] Meanwhile, the first digital pressure switch (9) is provided to control the pressure of the first compressor (1), and it is desirable to add a feedback function to verify the control pressure of the first compressor (1) and the actual pressure of the first flow path (1000) to reduce the deviation.

[0031] Additionally, the second digital pressure switch (40) is provided to control the pressure of the second compressor (30), and it is desirable to add a feedback function to verify the control pressure of the second compressor (30) and the actual pressure of the second flow path (3000) to reduce the deviation.

[0032] Meanwhile, the shock absorber tank (70) is provided in the second path (3000). More specifically, the shock absorber tank (70) is provided at a branched position in the second path (3000) between the second condenser (32) and the second filter dryer (33). In addition, the shock absorber tank (70) is provided to prevent the pressure from rising above normal pressure when the second compressor (30) starts, and even if abnormal pressure occurs, it absorbs such abnormal pressure to fundamentally prevent the second compressor (30) from being damaged or broken. Furthermore, the shock absorber tank (70) also performs an additional function of replenishing the insufficient refrigerant in the second path (3000) when the temperature drops to ultra-low.

[0033] Therefore, even if the shock absorber tank (70) injects more refrigerant than the amount of refrigerant previously injected, the second compressor (30) is not overloaded, and the refrigeration capacity is improved by approximately 30%.

[0034] The shock absorber tank (70) of this type is a hollow type tank having a cylindrical shape, and the pipe of the second flow path (3000) and the shock absorber tank (70) are connected by a capillary tube of 3 mm or less, such as a capillary tube with a diameter of 1 to 3 mm, to assist in cushioning.

[0035] In addition, the shock absorber tanks (70) of the present invention are configured as a set of two in parallel, and auxiliary tanks (73, 74) are interposed between each shock absorber tank (70).

[0037] Hereinafter, the structure of the auxiliary tank (73, 74) described above will be examined in more detail with reference to FIG. 2 and FIG. 3.

[0038] Before explaining, the configuration of each auxiliary tank (73, 74) is identical, differing only in the pressure that can be accommodated when accommodating the refrigerant. Therefore, in the following description, we will only examine the first auxiliary tank (73), and the reference numerals in the drawings will be indicated together.

[0039] The above auxiliary tank (73) is provided with a housing (731) having a certain space formed inside. The housing (731) is formed in a cylindrical shape, and an inlet pipe for introducing refrigerant is provided at the top.

[0040] Meanwhile, a first pressure member (732) is provided, in which the inner wall surface and edge of the housing (731) are in contact and move up and down, a first insertion member (7321) is formed protruding from the center of the lower surface, and two or more pressure bars (7324) are formed protruding from the edge area of ​​the lower surface. The upper part of the first pressure member (732) is formed in a disc shape, and the pressure bars (7324) are arranged at equal intervals of 120° in the edge area of ​​the first pressure member (732).

[0041] Meanwhile, a first guide (7322) that guides the first insert member (7321) from the outside is formed protruding from the inner lower surface of the housing (731). Therefore, in the unpressurized state, as shown in FIG. 2, the first guide (7322) accommodates a portion of the lower end of the first insert member (7321). Additionally, a first spring (7323) is provided on the outside of the first insert member (7321) and the first guide (7322), with its upper end in contact with the center of the lower surface of the first pressurizing member (732) and its lower end in contact with the bottom surface of the housing (731). Thus, when a refrigerant flows in from the upper part of the first pressurizing member (732) at a certain pressure, the first pressurizing member (732) is pressurized by that pressure, and is configured to be resilient by the first spring (7323).

[0042] Meanwhile, a ring-shaped second pressure member (734) is provided below the first pressure member (732) described above, and is pressed by a pressure bar (7324) when the first pressure member (732) is lowered, with a central hole (7444) formed so that the first insertion member (7321) and the first guide (7322) can pass through the center. Two or more second insertion members (7341) are provided in the edge area of ​​the second pressure member (734). In the present invention, the second insertion part (7341) is shown as having two configurations symmetrical to each other on both sides, but it is obvious that it can be configured with three or more depending on the size of the housing.

[0043] Additionally, a second guide (7342) is provided, which is formed protruding from the inner lower surface of the housing (731) and is eccentrically positioned at a certain distance from the first guide (7322) to guide the second insertion member (7341) from the outside. A second spring (7343) is provided on the outside of the second insertion member (7341) and the second guide (7342), and is configured such that its upper portion contacts the lower surface of the first pressure member (732) and its lower portion contacts the bottom surface of the housing (731).

[0044] Accordingly, when the pressure of the refrigerant flowing into the inside of the housing (731) is applied first, it presses the first pressurizing member (732) to cause it to descend, and when the pressure becomes stronger in the first stage, the first pressurizing member (732) presses the second pressurizing member (734) to cause it to descend. At this time, as shown in FIGS. 2 to 4, two or more first pressurizing bars (7324) protruding from the edge area of ​​the first pressurizing member (732) are supported in the edge area of ​​the second pressurizing member (734), so that the first pressurizing member (732) and the second pressurizing member (734) can be pressed and descended while spaced apart at a certain distance so that they are parallel to each other. A detailed explanation will be provided later with reference to FIG. 4.

[0045] That is, each auxiliary tank (73, 74) is intended to accommodate pressure higher than preset pressure when the compressor (1, 30) provided on the first path (1000) and the second path (3000) is operated, and allows the refrigerant to be moved to the auxiliary tank (73, 73) when the pressure cannot be accommodated even in the shock absorber tank (70).

[0046] Meanwhile, each shock absorber tank (71, 72) and auxiliary tank (73, 74) are connected to each other, and a valve (711, 712, 721, 722) is provided in the middle of the path. For convenience of explanation, based on the drawing, the side where the first shock absorber tank (71) is located on the right is described as the first part (710), and the side where the second shock absorber tank (72) is located on the left is described as the second part (720).

[0047] The first and second valves (711, 712) provided on the first part (710) are opened and closed simultaneously, and the third and fourth valves (721, 722) provided on the second part (720) are also opened and closed simultaneously.

[0048] Meanwhile, a control unit (75) is provided to detect the set pressure of each shock absorber tank (71, 72) and to control the opening and closing of each valve (711, 712, 721, 722).

[0050] Hereinafter, we will examine the operating state of the heat resistance testing device equipped with the shock absorber tank of the present invention configured as described above.

[0051] FIG. 4 is a drawing for explaining the operating state of the shock absorber of a heat resistance test device equipped with the shock absorber tank of the present invention.

[0052] For example, if the pressure of the first shock absorber tank (71) becomes higher than the preset pressure, the control unit (75) detects this and primarily opens the first valve (711) and the second valve (712) of the first part (710) to allow flow into the first auxiliary tank (73).

[0053] Meanwhile, if the capacity limit of the first shock absorber tank (71) is exceeded, the control unit (75) detects this and receives the refrigerant into the second shock absorber tank (72). However, if the refrigerant can no longer be received in the second shock absorber tank (72), the control unit (75) detects this and opens the third and fourth valves (721, 722) to receive the refrigerant.

[0054] For example, as shown in FIG. 4, in the case of the first auxiliary tank (73), the pressure pressing the first pressurizing member (732) can be set to 2 atmospheres (see FIG. 4-(2)) and the pressure pressing the second pressurizing member (734) can be set to 2.5 atmospheres (see FIG. 4-(3)). Additionally, in the case of the second auxiliary tank (74), the pressure pressing the first pressurizing member (742) can be set to 3 atmospheres and the pressure pressing the second pressurizing member (744) can be set to 3.5 atmospheres.

[0055] Conversely, when the pressure of the first and second shock absorber tanks (71, 72) changes to an environment where the pressure is maintained at a preset pressure, the refrigerant flowing into the auxiliary tank flows back into each shock absorber tank as the pressurizing members rise in the reverse order described above, and the control unit (75) detects this and closes each valve (711, 712, 721, 722).

[0056] In this way, by setting the pressure that can be handled in each auxiliary tank (73, 74), it is possible to prevent excessive pressure from being concentrated in the first and second shock absorber tanks (71, 72) and to operate a safe heat resistance test device.

[0057] The embodiments of the heat resistance testing apparatus equipped with the shock absorber tank of the present invention described above are merely illustrative, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical concept or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0058] The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0059] 1000 : 1 Euro 1: First compressor 2: First oil separator 3: 1st condenser 4: 1st solenoid valve 5: 1st filter dryer 6: 1st extension valve 7: Heat exchanger 8: First oil return valve 3000 : 2nd Euro 30: 2nd compressor 31: 2nd oil separator 32: 1st condenser 33: 1st filter dryer 34: Main solenoid valve 35: First extension valve 36: Evaporator 39: Second oil return valve 70: Pressure regulator 71: 1st shock absorber tank 72: 2nd shock absorber tank 73 : 1st Auxiliary Tank 731 : Housing 732 : First pressure member 7321 : First insertion member 7322 : First guide 7323 : 1st spring 7324 : Pressure bar 734 : Second pressing member 7341 : Second insertion member 7342 : 2nd Guide 7343 : 2nd Spring 7344 : Center hole 74 : 2nd Auxiliary Tank 741 : Housing 742 : First pressure member 7421 : First insertion member 7422 : First guide 7423 : 1st spring 7424 : Pressure bar 744 : Second pressing member 7441 : Second insertion member 7442 : 2nd Guide 7443 : 2nd Spring 7444 : Center ball 75 : Control unit 710: Part 1 711: 1st valve 712: 2nd valve 720 : Part 2 721: 3rd valve 722: 4th valve

Claims

Claim 1 A first flow path (1000) sequentially circulating through a first compressor (1), a first oil separator (2), a first condenser (3), a first solenoid valve (4), a first filter dryer (5), a first expansion valve (6), a heat exchanger (7), and the first compressor (1); a second flow path (3000) sequentially circulating through a second compressor (30), a second oil separator (31), a second condenser (32), a second filter dryer (33), the heat exchanger (7), a main solenoid valve (34), a main expansion valve (35), an evaporator (36), and the second compressor (30); a first digital pressure switch (9) provided to control the first compressor (1); a second digital pressure switch (40) provided to control the second compressor; and two or more pressure tanks provided on the second flow path (3000); and two or more auxiliary tanks for maintaining a constant pressure of the refrigerant flowing into the above-mentioned shock absorber tank; wherein the auxiliary tank is composed of a pressurizing member that is pressurized and operated according to the pressure of the refrigerant flowing in from the shock absorber tank, and is composed of an elastic member that elastically supports the pressurizing member; the auxiliary tank comprises: a housing having a certain space formed inside and an inlet pipe provided at the top for the refrigerant to flow in; a first pressurizing member having a disc-shaped structure in which the inner wall surface and the edge of the housing are in contact, and which moves up and down, and in which a first insertion member is formed protruding from the center of the lower surface and two or more pressurizing bars are formed protruding from the edge area of ​​the lower surface; a first guide formed protruding from the inner lower surface of the housing and guiding the first insertion member from the outside; a first spring provided on the outside of the first insertion member and the first guide, the upper end of which is in contact with the center of the lower surface of the first pressurizing member and the lower end of which is in contact with the bottom surface of the housing; the first pressurizing member A ring-shaped second pressure member provided at the bottom, which is pressed by a pressure bar when the first pressure member is lowered, and has a central hole formed in the center through which the first insertion member and the first guide can pass; and a second insertion member formed protruding in two or more places in the edge area of ​​the second pressure member;A second guide formed protruding from the inner lower surface of the housing, eccentrically positioned at a certain distance from the first guide to guide the second insertion member from the outside; and a second spring provided on the outer side of the second insert member and the second guide, with the upper part in contact with the lower surface of the first pressurizing member and the lower part in contact with the bottom surface of the housing; further comprising a first oil return valve (8) interposed in a return path communicating the first oil separator (2) and the first compressor (1), and further comprising a second oil return valve (39) interposed in a return path communicating the second oil separator (31) and the second compressor (30); the pressure shock absorber tank is a vertical type tank with a hollow structure having a cylindrical shape, two of which are installed in parallel, and is connected to the second path by a capillary tube with a diameter of 1 to 3 mm; the pressurizing bar is arranged at equal intervals of 120° in the edge area of ​​the first pressurizing member, and when the pressure of the refrigerant flowing into the inside of the housing is primarily pressurized, the first pressurizing member is pressed down and descends. A heat resistance testing device equipped with a shock absorber tank, characterized in that when a stronger pressure is applied in the first stage, two or more pressure bars protruding from the edge region of the first pressure member are supported in the edge region of the second pressure member, so that the first pressure member and the second pressure member are pressed and lowered while spaced apart at a certain distance so as to be parallel to each other. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete

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