Temperature detection device for compressor and scroll compressor

Abstract

The utility model provides a temperature detection device for a compressor and a scroll compressor, the compressor comprises a compression mechanism provided with a mounting part and an exhaust port, the temperature detection device comprises a hollow shell and a body of an inner cavity defined by the shell, and the body comprises a first end part and a second end part opposite to the first end part; the temperature sensor is accommodated in the inner cavity and is positioned at the first end part; a wiring terminal; and a flexible connecting line connecting the temperature sensor and the wiring terminal, the flexible connecting line being arranged to extend in a direction from the first end portion to the second end portion and including an outer side portion extending beyond the second end portion and connected with the wiring terminal, such that the outer side portion and the wiring terminal are located outside the body, the temperature detection device is mountable in the mounting portion and is arranged such that the first end portion is close to the exhaust port and the outer portion and the wiring terminal are located outside the compression mechanism. The temperature detection device provided by the utility model has the advantages of small volume, small required assembly space and high reliability.

Description

Technical Field

[0001] The utility model relates to a temperature detection device for a compressor, in particular to a temperature detection device for detecting the temperature of the scroll exhaust port of a scroll compressor. Background Art

[0002] This section provides background information related to the present utility model, which does not necessarily constitute prior art.

[0003] In a compressor, an accurate exhaust temperature can be obtained by arranging a temperature detection device at the exhaust port of the compression mechanism to monitor the operating condition of the compressor, thereby improving the operating efficiency and reliability of the compressor. The current temperature detection device not only has a large volume, resulting in more material removal from the compression component for installing the temperature detection device, thus affecting the strength of the compression component, but also requires a large assembly space and is prone to interference with other components of the mass-produced compressor during assembly. In particular, with the development of small-bore scroll compressors operating under harsh conditions, the current temperature probe cannot meet the compact design requirements of small-bore scroll compressors.

[0004] Therefore, the present utility model expects to provide a temperature detection device that is small in volume, requires a small assembly space, and has a simple structure, and is particularly suitable for small-bore scroll compressors. Summary of the Utility Model

[0005] One object of the present utility model is to provide a temperature detection device for a compressor, which is connected to a signal output device by a flexible connecting wire and a terminal block, avoiding the assembly angle limitation and assembly interference with other components of the compressor, thereby facilitating the realization of the compact design of the compressor.

[0006] One object of the present utility model is to provide a temperature detection device for a compressor, the volume of which is reduced, thereby reducing the material removal part of the compression component for installing the temperature detection device, ensuring the strength of the compression component, and improving the reliability of the compressor.

[0007] One object of the present utility model is to provide a temperature detection device for a compressor, the structure of which is simpler, with fewer intermediate connection points, improving the reliability of the temperature detection device.

[0008] One object of the present utility model is to provide a temperature detection device for a compressor, in which the temperature sensor is closer to the exhaust port of the compression mechanism, or even directly arranged in the exhaust port of the compression mechanism, improving the sensitivity of temperature monitoring.

[0009] According to one aspect of the present utility model, there is provided a temperature detection device for a compressor. The compressor includes a compression mechanism provided with a mounting portion and an exhaust port. The temperature detection device includes: a body, the body includes a hollow outer shell and an inner cavity defined by the outer shell, the body includes a first end and an opposite second end; a temperature sensor, the temperature sensor is accommodated in the inner cavity and located at the first end; a terminal; and a flexible connecting wire, the flexible connecting wire connects the temperature sensor and the terminal, wherein the flexible connecting wire is arranged to extend along a direction from the first end towards the second end and includes an outer side portion extending beyond the second end and connected to the terminal, so that the outer side portion and the terminal are located outside the body, wherein the temperature detection device can be installed in the mounting portion and is arranged such that the first end is close to the exhaust port and the outer side portion and the terminal are located outside the compression mechanism.

[0010] Optionally, the terminal can be connected to a signal output device outside the compression mechanism, and the length of the outer side portion is configured such that the outer side portion, the terminal, and the signal output device do not contact the silencer cover and the housing of the compressor.

[0011] Optionally, the mounting portion is configured as a duct formed in the fixed scroll end plate of the compression mechanism, and one end of the duct communicates with the exhaust port so that the first end is directly exposed to the exhaust port.

[0012] Optionally, the first end can be installed to extend out from one end of the duct and be located inside the exhaust port.

[0013] Optionally, the outer shell includes a tubular member and a joint member located at one end of the tubular member. The other end of the tubular member is used to form the first end, and the joint member is used to form the second end. The joint member is used to connect to the compression mechanism.

[0014] Optionally, the other end of the tubular member: is formed into a closed end by stamping and welding, or is formed into a closed end by deep drawing.

[0015] Optionally, the joint member is configured as a hollow cylinder, and an uneven structure is provided on the inner wall of the joint member, and / or a flanging is formed at the end of the joint member far from the first end.

[0016] Optionally, the tubular member and the joint member are integrally formed.

[0017] Optionally, a part of the flexible connecting wire is accommodated in the inner cavity, and the inner cavity is filled with a sealing material, and the sealing material can be cured to form an end cover portion that closes the inner cavity.

[0018] Optionally, the housing includes a tubular member and a joint member located at one end of the tubular member. The other end of the tubular member is configured to form the first end, and the joint member is configured to form the second end. Wherein, the joint member includes a beveled portion near the first end, and the beveled portion can abut against the inclined step surface in the passage to form a sealing surface.

[0019] Optionally, the housing includes a tubular member and a joint member located at one end of the tubular member. The other end of the tubular member is configured to form the first end, and the joint member is configured to form the second end. Wherein, the ratio of the maximum outer diameter of the joint member to the minimum thickness of the fixed scroll end plate in the axial direction of the compressor is less than 1.

[0020] Optionally, the housing includes a tubular member and a joint member located at one end of the tubular member. The other end of the tubular member is configured to form the first end, and the joint member is configured to form the second end. Wherein, the installation portion is configured to be a passage formed in the fixed scroll end plate of the compression mechanism. A back pressure chamber is provided on one side of the fixed scroll end plate. Wherein, the joint member includes a connecting section and an installation section in the axial direction of the joint member. The joint member is configured such that: the connecting section can be inserted into the passage and is threadedly connected to the passage, the installation section is located outside the compression mechanism, and the threaded portion of the connecting section is provided at a position closer to the radial outer side of the compression mechanism than the back pressure chamber along the radial direction of the compressor.

[0021] According to another aspect of the present utility model, there is provided a scroll compressor, wherein the scroll compressor includes a compression mechanism having a fixed scroll and the temperature detection device described above, and the temperature detection device is provided in the fixed scroll for detecting the temperature of the exhaust port of the compression mechanism.

[0022] Optionally, the cylinder diameter of the scroll compressor is in the range of 160 mm to 230 mm.

[0023] Generally, the temperature detection device for a compressor according to the present utility model has a simple structure, a small volume, a small required assembly space, high reliability, and high sensitivity, and is particularly suitable for small cylinder diameter compressors with limited internal space. Description of the Drawings

[0024] Through the following description with reference to the drawings, the features and advantages of one or more embodiments of the present utility model will become more readily understood. The drawings provided herein are for illustrative purposes only and are not intended to limit the scope of the present utility model in any way. The drawings are not drawn to scale, but some features may be enlarged or reduced to show details of specific components. In the drawings:

[0025] Figure 1 is a partial longitudinal sectional view of a scroll compressor according to a first embodiment of the present utility model;

[0026] Figure 2is a longitudinal sectional view of a temperature detection device of a scroll compressor according to a first embodiment of the present invention;

[0027] Figure 3 is a longitudinal sectional view of a housing of a temperature detection device of a scroll compressor according to a second embodiment of the present invention; and

[0028] Figure 4 is a partial longitudinal sectional view of a scroll compressor according to a comparative example of the present invention. Specific Embodiments

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The description is merely exemplary and does not constitute a limitation on the present invention and its applications.

[0030] Figure 1 A scroll compressor 1 according to a first embodiment of the present invention is shown. It should be noted that although in this embodiment, the compressor is shown as a vertical scroll compressor, it can be understood that the compressor can be any other suitable type of compressor and is not limited to the type shown in the figure. The scroll compressor 1 includes a generally cylindrical housing, which includes a main body (not shown) in the middle and a first end cover (not shown) and a second end cover (not shown) fixed to the axial (longitudinal) two ends of the main body. A silencing cover 12 extending generally horizontally (i.e., in a direction perpendicular to the axial direction of the scroll compressor 1, or in the radial direction of the scroll compressor 1) is further provided between the main body and the first end cover, thereby dividing the internal space of the housing of the compressor into a high-pressure side space and a low-pressure side space. Specifically, the space between the first end cover and the silencing cover 12 constitutes the high-pressure side space, and the space between the silencing cover and the second end cover constitutes the low-pressure side space. A motor (not shown), a rotating shaft (not shown), and a compression mechanism CM are disposed in the low-pressure side space.

[0031] The compression mechanism CM includes a fixed scroll 20 and a moving scroll 30 (only part is shown in Figure 1 ). The motor is configured to rotate the rotating shaft, and then the rotating shaft drives the moving scroll 30 to perform a relative movement around the fixed scroll 20 (i.e., the central axis of the moving scroll moves around the central axis of the fixed scroll, but the moving scroll does not rotate around its central axis).

[0032] The fixed scroll 20 may include a fixed scroll end plate 21, fixed scroll vanes 22 extending from one side of the fixed scroll end plate 21, and a substantially cylindrical outer peripheral wall 23 provided on the outer periphery of the fixed scroll vanes 22. An exhaust port 24 of the compression mechanism for discharging the compressed working fluid from the compression mechanism CM is also formed at the center of the fixed scroll end plate 21. The orbiting scroll 30 may include an orbiting scroll end plate (not shown) and orbiting scroll vanes formed on one side of the orbiting scroll end plate. The fixed scroll vanes 22 and the orbiting scroll vanes can be engaged with each other so that a series of fluid chambers are formed between the fixed scroll vanes 22 and the orbiting scroll vanes when the scroll compressor operates. This series of fluid chambers includes a suction chamber located at the outermost radial position, an exhaust chamber located at the center, and a plurality of intermediate compression chambers located between the suction chamber and the exhaust chamber. The exhaust chamber located at the center communicates with the exhaust port 24. The refrigerant enters the compression mechanism CM through the suction chamber, and after being compressed by the plurality of intermediate compression chambers, finally enters the exhaust chamber and is discharged from the compression mechanism CM through the exhaust port 24. In addition, a back pressure chamber P may be provided on the side of the fixed scroll end plate 21 opposite to the side where the fixed scroll vanes are provided to achieve axial sealing between the tip of the fixed scroll vanes 22 and the orbiting scroll end plate and between the tip of the orbiting scroll vanes and the fixed scroll end plate 21.

[0033] When the compressor operates under certain harsh conditions, problems such as excessively high internal temperature and lubrication influence may occur, resulting in wear and failure of compressor components. In addition, for a compressor with an economizer system, it is usually necessary to accurately control the injection amount of the economizer circuit according to the operating conditions of the compressor to improve the operating efficiency of the compressor. Therefore, in order to improve the reliability and operating efficiency of the compressor, it is necessary to monitor the internal temperature of the compressor. For example, the exhaust temperature of the compression mechanism can be detected by setting a temperature detection device near the exhaust port of the compression mechanism.

[0034] The temperature detection device can be configured as a temperature probe, for example. Refer to Figure 2, in the first embodiment of the present utility model, the temperature detection device 200 includes a body, a temperature sensor 210, a terminal 260, and a flexible connection line 250. The body includes a hollow outer shell and an inner cavity defined by the outer shell. The body is configured to be elongated and includes a first end and a second end opposite to the first end in its extending direction. The temperature sensor 210 is received in the inner cavity and is located at the first end. The flexible connection line 250 connects the temperature sensor 210 to the terminal 260. The terminal 260 is used to connect to a signal output device (which can be directly connected), so as to transmit the temperature signal detected by the temperature detection device 200 to the control device. The control device can be configured, for example, as an external protector disposed outside the compressor, and the external protector can determine whether the exhaust temperature is within a safe range according to the received temperature signal, so as to determine whether to start the shutdown protection. The signal output device is configured, for example, as a terminal of the motor lead. The flexible connection line 250 is arranged to extend along the direction from the first end of the body towards the second end, and includes an outer portion 252 extending beyond the second end and an inner portion 254 extending between the first end and the second end and received in the inner cavity of the body. The outer portion 252 is connected to the terminal 260, and the inner portion 254 is connected to the temperature sensor 210. Thus, the outer portion 252 and the terminal 260 are located outside the body, while the inner portion 254 and the temperature sensor 210 are located in the inner cavity of the body.

[0035] The outer shell may include a tubular member 220 and a joint member 230. As Figure 2As shown, the tubular member 220 is configured as a hollow steel pipe, for example, and includes opposite first and second ends 221 and 222 in its axial direction. At the first end 221 of the tubular member 220, the tube wall of the tubular member 220 can be formed with radially inward protrusions by stamping, and the protrusions are welded to each other to form a closed end, which is used to constitute the first end of the body (that is, the first end of the body includes the first end 221 of the tubular member 220 and the inner cavity located at the first end 221). The joint member 230 is provided at the second end 222 of the tubular member 220. More specifically, the joint member 230 is configured as a hollow cylinder, and the second end 222 of the tubular member 220 can be inserted into the interior of the joint member 230, and the second end 222 is welded to the inner wall of the joint member 230 to form a sealed connection. The joint member 230 includes a connecting section 232 and a mounting section 231 in its axial direction. The connecting section 232 defines a central passage for receiving the second end 222 of the tubular member, and the central passage communicates with the central passage defined by the mounting section 231. The joint member 230 is used to constitute the second end of the body (that is, the second end of the body includes the joint member 230 and the inner cavity located at the joint member). The inner cavity of the tubular member and the central passage defined by the mounting section 231 together constitute the inner cavity of the body, and the inner cavity of the body is filled with a sealing material, such as resin, etc., to achieve the sealing of the inner cavity. The sealing material can be cured to form an end cap portion 238 that closes the inner cavity of the body.

[0036] Preferably, an uneven structure 234 can be provided on the inner wall of the mounting section 231 for defining its central passage, so as to increase the adhesion of the sealing material, such that the sealing material, the temperature sensor 210, and the flexible connecting wire 250 are not easily loosened, displaced, or detached from the inner cavity of the body. The uneven structure 234 is, for example, a groove, a thread, or an anaglyph, etc. Preferably, at the end of the mounting section 231 away from the first end of the body, that is, at the end of the mounting section 231 located on the side opposite to the connecting section 232, a flanging 235 can be formed. The flanging 235 can be configured to extend radially inwardly around the central passage of the mounting section 231, or more preferably, can be configured as shown in Figure 2 a shape that extends axially away from the connecting section 232 around the central passage of the mounting section 231 and then bends radially inwardly, so as to further increase the adhesion of the sealing material while directly forming a more firm end cap portion through the filling and curing of the sealing material, omitting an additional end cap component and reducing the overall volume of the mounting section.

[0037] In order to detect the exhaust temperature at the exhaust port 24 of the compression mechanism, the temperature detection device 200 can be installed in the mounting portion of the compression mechanism CM. For example, as shown in Figure 1As shown, the mounting portion of the compression mechanism CM can be configured to form a passage 25 in the fixed scroll end plate 21 of the fixed scroll 20 of the compression mechanism CM. The passage 25 extends substantially along the radial direction of the compression mechanism, and preferably can be configured to penetrate the fixed scroll end plate 21. One end of the passage 25 communicates with the exhaust port 24, so that the temperature detection device 200 (specifically, the first end of the body of the temperature detection device 200) disposed in the through-hole 25 can be directly exposed to the exhaust port 24, thereby achieving more accurate and sensitive detection of the exhaust temperature. The other end of the passage 25 communicates with the outside of the compression mechanism CM.

[0038] When the temperature detection device 200 is installed in place in the compression mechanism CM, the temperature detection device 200 can be arranged such that the first end of the body (the first end 221 of the tubular member 220) is close to the exhaust port 24 and the outer side portion 252 of the flexible connection line 250 and the terminal 260 are located outside the compression mechanism CM.

[0039] Preferably, the connecting section 232 of the joint member 230 can be formed with a threaded portion 233 on its outer peripheral surface for connection and fixation with a corresponding mounting member (such as the fixed scroll of a compressor). In addition, the end of the connecting section 232 close to the first end of the body can also be formed with a chamfered portion 236. The chamfered portion 236 surrounds the central passage of the connecting section 232 and has an inclined surface inclined with respect to the central axis of the connecting section 232. The mounting section 231 can be configured in a nut shape facilitating screwing installation.

[0040] When installing the temperature detection device 200 onto the fixed scroll 20, the tubular member 220 can be inserted into the passage 25 from the outside of the fixed scroll 20, and by screwing the mounting section 231 of the joint member 230, the threaded portion 233 of the connecting section 232 is fixedly connected to the corresponding mounting surface of the fixed scroll (such as the threaded mounting surface in the passage 25). After the temperature detection device 200 is installed in place, the chamfered portion 236 of the connecting section 232 abuts against the corresponding stepped surface of the fixed scroll (such as the inclined stepped surface in the passage 25), thereby forming a seal for the passage 25. After the temperature detection device 200 is installed in place, the tubular member 220 and the connecting section 232 of the joint member 230 are located in the passage 25 of the fixed scroll 20, while the mounting section 231 of the joint member 230 is located outside the fixed scroll. In order to accommodate the mounting section 231 of the joint member 230 and at least part of the flexible connection line 250 and the terminal 260, it is usually necessary to remove a part of the material of the radially outer portion of the fixed scroll 20 (including the fixed scroll end plate and / or the outer peripheral wall) to obtain a mounting space. For example, a material removal portion 27 of the fixed scroll 20 can be formed around the opening on the radially outer surface of the fixed scroll for the passage 25, and the mounting section 231 can be at least partially accommodated in the material removal portion 27.

[0041] Preferably, the ratio of the maximum outer diameter D of the joint member 230 (e.g., the outer diameter of the mounting section configured in the shape of a nut) to the minimum thickness H of the fixed scroll end plate 21 in the axial direction of the compressor is at least less than 1, i.e., D / H < 1, so as to ensure the scroll strength.

[0042] Preferably, after the temperature detection device 200 is installed in place, the threaded portion 233 of the connecting section 232 inserted into the passage 25 of the fixed scroll 20 is arranged at a position closer to the radially outer side of the compression mechanism than the back pressure chamber P in the radial direction of the compressor. That is to say, the threaded portion 233 does not extend below the back pressure chamber P, so as to further ensure the scroll strength.

[0043] As Figure 1 shown, the outer portion 252 of the flexible connecting wire 250 can be bent and sag, so as to avoid interference with other components of the compressor when the terminal 260 is connected to the signal output device. In particular, the length and tolerance of the outer portion 252 of the flexible connecting wire 250 need to be controlled, and its length is configured such that the outer portion 252, the terminal 260 and the signal output device do not contact the sound insulation cover 12 and the housing of the compressor. The temperature detection device according to the present utility model is particularly suitable for small-bore compressors with a cylinder diameter between 160 mm and 230 mm.

[0044] The advantages of the temperature detection device according to the first embodiment of the present utility model will be further described below in conjunction with Figure 4 the comparative examples shown.

[0045] Figure 4Fig. 0 shows a compressor 1' according to a comparative example, where the basic structure and operating principle of the compressor are the same as those of the compressor 1 in the first embodiment of the present invention, and will not be described herein again. In this comparative example, a duct 25' is formed in the fixed scroll end plate 21 of the fixed scroll 20 of the compressor 1', and the temperature detection device 100 can be installed in the duct 25'. The temperature detection device 100 includes a body, a temperature sensor (not shown), a connection wire (not shown), and a metal pin 160. Among them, the body includes a hollow outer shell and an inner cavity defined by the outer shell. The body is configured to be elongated and includes a first end and a second end opposite to the first end in its extending direction. The temperature sensor is accommodated in the inner cavity and is located at the first end, and the metal pin 160 is fixed to the outer shell at the second end and extends away from the outer shell. The connection wire is arranged in the inner cavity and connects the temperature sensor and the metal pin 160. The metal pin 160 (male head) is used to connect with a female head such as a motor lead wire to output a temperature signal to an external temperature protector. Since the connection between the metal pin 160 and the female head of the motor lead wire is a rigid connection, a large space is required during the assembly connection, and it is easy to interfere with the silencing cover 12 or the housing. In addition, the connection angle of the metal pin 160 is fixed and cannot be adjusted. If the temperature detection device 100 is improperly assembled, there is a problem that the orientation of the metal pin 160 is incorrect, resulting in serious interference between the female head of the motor lead wire and other components such as the silencing cover and inability to install. In contrast, in the first embodiment of the present invention, since the outside of the body of the temperature detection device 200 is the outer side portion 252 of the flexible connection wire 250 and the connection terminal 260, and the length of the outer side portion 252 of the flexible connection wire 250 is controlled, the outer side portion 252, the connection terminal 260, and the signal output device do not contact the silencing cover 12 and the compressor housing, thereby avoiding the problem of assembly interference. In particular, the outer side portion 252, the connection terminal 260, and the signal output device can be away from the weld between the silencing cover 12 and the compressor housing, thereby avoiding damage to the temperature detection device caused by welding heat.

[0046] In addition, as Figure 4As shown, in the comparative example, the housing of the temperature detection device 100 includes a tubular member 120 and a joint member 130. Similarly to the first embodiment of the present invention, the joint member 130 can also be configured as a hollow cylindrical shape and includes a connection section 132 and a mounting section 131 in its axial direction. The connection section 132 can be formed with a threaded portion on its outer peripheral surface, so as to cooperate with the threaded portion formed on the inner wall surface of the hole 25' when inserted into the hole 25' of the fixed scroll end plate, to fixedly connect the temperature detection device 100 with the fixed scroll 20. In addition, different from the first embodiment of the present invention, in order to fix the metal pin 160 to the housing at the second end of the body, the joint member 130 further includes an end cap 133 located at the end of the joint member (the end of the mounting section 131), the end cap 133 is fixed to the mounting section 131, and the metal pin 160 is fixed on the end cap 133. On the one hand, since the dimensions of the metal pin 160 and the end cap 133 in the radial direction of the compression mechanism CM (shown as the horizontal direction in Figure 4 are relatively large, it is usually necessary to set the temperature detection device 100 as far as possible towards the radial interior of the fixed scroll to avoid interference between the metal pin and the female head of the motor lead connected to the metal pin and other components (although not clearly shown in Figure 4 , those skilled in the art can understand that the temperature detection device 100 is set to move leftward as a whole, so as to leave more installation space on the right side). Thus, the connection section 132 with the threaded portion is likely to extend into the thinner section of the fixed scroll end plate 21 (for example, the section of the fixed scroll end plate 21 located below the back pressure chamber P), and the stress generated by the threaded connection is concentrated in the thinner section of the scroll end plate 21, which will bring more challenges to the safety of the scroll strength. On the other hand, the dimensions of the metal pin 160 and the end cap 133 in the axial direction of the compression mechanism CM (shown as the vertical direction in Figure 4 are also relatively large. In order to accommodate the mounting section 131 and the end cap 133 of the joint member 130, it is necessary to remove more material from the radially outer part of the fixed scroll 20 to leave more installation space for the connection between the metal pin and the female head of the motor lead. That is, the material removal part 27' of the fixed scroll 20 is relatively large, which will also have an adverse effect on the scroll strength.

[0047] In contrast, in the first embodiment of the present utility model, the temperature detection device 200 omits the end cap of the connector. At the same time, since the metal pin is replaced with a flexible connecting wire and a terminal, as a whole, the part of the temperature detection device near the second end (including the connector and the part located radially outside the connector, which is the connector 230, the outer part 252 of the flexible connecting wire, and the terminal 260 for the first embodiment of the present utility model, and the connector 130 and the metal pin 160 for the comparative example) occupies less space in the radial direction of the compression mechanism, and at the same time, the dimension of the installation section 230 of the temperature detection device 200 in the axial direction of the compression mechanism is reduced. Therefore, on the one hand, the temperature detection device 200 can be arranged to be closer to the radial outside of the compression mechanism compared to the overall position of the temperature detection device 100 in the compression mechanism, thereby reducing or avoiding the connecting section 232 with a threaded part from extending into the thinner section of the fixed scroll end plate 21, thus improving the scroll strength. On the other hand, the material removal part 27 of the fixed scroll 20 for accommodating the installation section 230 can also be correspondingly reduced, so as to further improve the scroll strength without changing the thickness of the scroll, making the compressor have a lower risk when using a high-pressure refrigerant, such as R32.

[0048] In addition, in the temperature detection device 100 of the comparative example, the temperature sensor is connected to the connecting wire. The connecting wire needs to be welded to the metal pin, and then the metal pin and the female head of the motor lead are connected to output the temperature signal, with more intermediate connection points. In contrast, in the first embodiment of the present utility model, the temperature detection device 200 directly connects the temperature sensor to the motor lead through the flexible connecting wire and the terminal, reducing the intermediate connection points, and thus reducing the risk of failure of the temperature detection device.

[0049] In addition, in the comparative example, the duct 25' for installing the temperature detection device in the fixed scroll end plate 21 is configured as a counterbore extending from the radially outer surface of the fixed scroll end plate 21 toward the exhaust port 24. One end of the duct 25' is close to the exhaust port 24 but not directly communicated with the exhaust port 24. That is to say, there is a partition wall 28 between the duct 25' and the exhaust port 24, so as to realize the isolation between the high-pressure side (i.e., the exhaust port of the compression mechanism) and the low-pressure side (i.e., the outside of the compression mechanism CM). In contrast, in the first embodiment of the present invention, the duct 25 for installing the temperature detection device in the fixed scroll end plate 21 is configured as a through hole, and the first end of the temperature detection device 200 can be set to be closer to the exhaust port 24, or even directly extend into the exhaust port 24, so as to further improve the sensitivity of the temperature detection device. In addition, the temperature detection device 200 abuts against the inclined step surface in the duct 25 through the beveled portion 236 of the joint 230 to form a sealing surface, so as to prevent the fluid on the high-pressure side from leaking to the low-pressure side through the gap between the inner wall surface defining the duct 25 and the outer surface of the temperature detection device, thereby realizing the isolation between the high-pressure side and the low-pressure side, with a simple structure and convenient installation.

[0050] Those skilled in the art can understand that the present invention is not limited to the form shown in the first embodiment. For example, in the second embodiment of the present invention as shown in Figure 3 the housing of the temperature detection device can be configured in a form in which the tubular member 320 and the joint 330 are formed as one body to further simplify the installation, rather than the form in which the two separate components of the tubular member 220 and the joint 230 are connected to each other as shown in Figure 2 In addition, in the second embodiment of the present invention, at the first end 321 of the tubular member 320, the tubular member 320 can form a closed end by deep drawing. This way of forming the end not only further reduces the risk of end leakage, but also the end formed in this way has a smaller volume and a smaller pipe diameter. Therefore, the temperature sensor can be arranged closer to the end wall of the housing at the first end of the body, so that when the temperature detection device is installed in the installation duct of the fixed scroll, the temperature sensor can be closer to the exhaust port of the compression mechanism and the working fluid in the exhaust port, thereby further improving the sensitivity of the temperature sensor.

[0051] The temperature detection device and the scroll compressor according to the preferred embodiments of the present invention are described above in conjunction with specific embodiments. It can be understood that the above description is only exemplary and not restrictive. Without departing from the scope of the present invention, those skilled in the art can think of various variations and modifications with reference to the above description. These variations and modifications are also included in the protection scope of the present invention.

Claims

1. A temperature detection device for a compressor, the compressor including a compression mechanism provided with a mounting portion and an exhaust port, the temperature detection device comprising: A body, the body including a hollow outer shell and an inner cavity defined by the outer shell, the body including a first end and an opposite second end; A temperature sensor, the temperature sensor being received in the inner cavity and located at the first end; A terminal block; and A flexible connecting wire, the flexible connecting wire connecting the temperature sensor to the terminal block, Characterized in that the flexible connecting wire is arranged to extend along a direction from the first end towards the second end and includes an outer side portion extending beyond the second end and connected to the terminal block, so that the outer side portion and the terminal block are located outside the body, Wherein, the temperature detection device can be installed in the mounting portion and is arranged such that the first end is close to the exhaust port and the outer side portion and the terminal block are located outside the compression mechanism.

2. The temperature detection device for a compressor according to claim 1, characterized in that, The terminal block can be connected to a signal output device outside the compression mechanism, and the length of the outer side portion is configured such that the outer side portion, the terminal block and the signal output device do not contact the silencer cover and the housing of the compressor.

3. The temperature detection device for a compressor according to claim 1, characterized in that, The mounting portion is configured as a duct formed in the fixed scroll end plate of the compression mechanism, and one end of the duct communicates with the exhaust port so that the first end is directly exposed to the exhaust port.

4. The temperature detection device for a compressor according to claim 3, characterized in that, The first end can be installed to extend out from one end of the duct and be located inside the exhaust port.

5. The temperature detection device for a compressor according to any one of claims 1 to 4, characterized in that, The outer shell includes a tubular member and a joint member located at one end of the tubular member, the other end of the tubular member being used to form the first end, and the joint member being used to form the second end, and the joint member being used to connect to the compression mechanism.

6. The temperature detection device for a compressor according to claim 5, characterized in that, The other end of the tubular member: Is formed into a closed end by stamping and welding, or Is formed into a closed end by deep drawing method.

7. The temperature detection device for a compressor according to claim 5, characterized in that, The joint member is configured as a hollow cylindrical shape, An uneven structure is provided on the inner wall of the joint member, and / or A flanging is formed at the end of the joint member far from the first end.

8. The temperature detection device for a compressor according to claim 5, characterized in that, The tubular member and the joint member are integrally formed.

9. The temperature detection device for a compressor according to any one of claims 1 to 4, characterized in that, A part of the flexible connecting wire is received in the inner cavity, and the inner cavity is filled with a sealing material, and the sealing material can be cured to form an end cover portion closing the inner cavity.

10. The temperature detection device for a compressor according to claim 1 or 2, characterized in that, The outer shell includes a tubular member and a joint member located at one end of the tubular member, the other end of the tubular member being used to form the first end, and the joint member being used to form the second end, Wherein, the mounting portion is configured as a duct formed in the fixed scroll end plate of the compression mechanism, Wherein, the joint member includes an inclined cutting portion close to the first end, and the inclined cutting portion can abut against an inclined step surface in the duct to form a sealing surface.

11. The temperature detection device for a compressor according to claim 1 or 2, characterized in that, The outer shell includes a tubular member and a joint member located at one end of the tubular member, the other end of the tubular member being used to form the first end, and the joint member being used to form the second end, Wherein, the installation part is configured to be a duct formed in the stationary scroll end plate of the compression mechanism. Wherein, the ratio of the maximum outer diameter of the joint to the minimum thickness of the stationary scroll end plate in the axial direction of the compressor is less than 1.

12. The temperature detection device for a compressor according to claim 1 or 2, characterized in that, The housing includes a tubular member and a joint located at one end of the tubular member. The other end of the tubular member is used to form the first end, and the joint is used to form the second end. Wherein, the installation part is configured to be a duct formed in the stationary scroll end plate of the compression mechanism, and a back pressure chamber is provided on one side of the stationary scroll end plate. Wherein, the joint includes a connecting section and an installation section in the axial direction of the joint. The joint is configured such that the connecting section can be inserted into the duct and threadedly connected to the duct. The installation section is located outside the compression mechanism, and the threaded portion of the connecting section is disposed at a position closer to the radially outer side of the compression mechanism than the back pressure chamber along the radial direction of the compressor.

13. A scroll compressor, characterized in that, The scroll compressor includes a compression mechanism having a stationary scroll and the temperature detection device according to any one of claims 1 to 12. The temperature detection device is provided in the stationary scroll for detecting the temperature of the exhaust port of the compression mechanism.

14. The scroll compressor according to claim 13, wherein, The cylinder diameter of the scroll compressor is in the range of 160 mm to 230 mm.

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