Temperature detection device for compressor and scroll compressor

Abstract

The invention 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 body comprising a hollow shell and an inner cavity defined by the shell, and the body comprises a first end and an opposite second end; the temperature sensor is accommodated in the inner cavity and is positioned at the first end part; a wiring terminal; the flexible connecting line is used for connecting the temperature sensor and the wiring terminal, the flexible connecting line is arranged to extend in the direction from the first end part to the second end part and comprises an outer side part which extends out of the second end part and is connected with the wiring terminal, so that the outer side part and the wiring terminal are positioned 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 is small in size, small in required assembly space and high in reliability.

Description

Technical Field

[0001] This invention relates to a temperature detection device for a compressor, and more particularly to a temperature detection device for detecting the temperature of the scroll exhaust port of a scroll compressor. Background Technology

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

[0003] In compressors, accurate exhaust temperature can be obtained by installing a temperature detection device at the exhaust port of the compression mechanism, enabling monitoring of the compressor's operating status and thus improving its efficiency and reliability. However, current temperature detection devices are not only bulky, leading to significant material removal from the compression components used to install them, thus affecting the strength of those components, but also require considerable assembly space, making them prone to interference with other components of mass-produced compressors during assembly. In particular, with the development of small-bore scroll compressors operating under harsh conditions, current temperature probes cannot meet the compact design requirements of small-bore scroll compressors.

[0004] Therefore, the present invention aims to provide a temperature detection device that is small in size, requires little assembly space, and has a simple structure, and is particularly suitable for small-bore scroll compressors. Summary of the Invention

[0005] One of the objectives of this invention is to provide a temperature detection device for a compressor. This temperature detection device uses a flexible connecting wire and terminal block to connect to a signal output device, avoiding assembly angle limitations and assembly interference with other components of the compressor, thereby facilitating the compact design of the compressor.

[0006] One objective of this invention is to provide a temperature detection device for a compressor, which reduces the size of the device, thereby reducing the amount of material removed from the compression component used to mount the device, ensuring the strength of the compression component, and improving the reliability of the compressor.

[0007] One of the objectives of this invention is to provide a temperature detection device for a compressor, which has a simpler structure, fewer intermediate connection points, and improved reliability.

[0008] One of the objectives of this invention is to provide a temperature detection device for a compressor, wherein the temperature sensor in the device is closer to the exhaust port of the compressor mechanism, or even directly installed in the exhaust port of the compressor mechanism, thereby improving the sensitivity of temperature monitoring.

[0009] According to one aspect of the present invention, a temperature detection device for a compressor is provided. The compressor includes a compression mechanism having a mounting portion and an exhaust port. The temperature detection device includes: a body comprising 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 housed in the inner cavity and located at the first end; a terminal block; and a flexible connecting wire connecting the temperature sensor to the terminal block, wherein the flexible connecting wire is arranged to extend along a direction from the first end toward the second end and includes an outer portion extending beyond the second end and connected to the terminal block, such that the outer portion and the terminal block are located outside the body, wherein the temperature detection device can be mounted in the mounting portion and arranged such that the first end is close to the exhaust port and the outer portion and the terminal block are located outside the compression mechanism.

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

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

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

[0013] Optionally, the housing includes a tubular member and a connector located at one end of the tubular member, the other end of the tubular member forming a first end, the connector forming a second end, and the connector being used for connection with a compression mechanism.

[0014] Alternatively, the other end of the tubular member may be formed as a closed end by stamping and welding, or by deep drawing.

[0015] Optionally, the connector is constructed as a hollow cylinder, with an uneven structure on the inner wall of the connector, and / or a flange is formed at the end of the connector away from the first end.

[0016] Alternatively, the tubular component and the connector are formed integrally.

[0017] Optionally, a portion of the flexible connecting wire is housed in an inner cavity filled with a sealing material that can be cured to form an end cap that seals the inner cavity.

[0018] Optionally, the housing includes a tubular member and a connector located at one end of the tubular member, the other end of the tubular member forming a first end, and the connector forming a second end, wherein the connector includes a chamfered portion near the first end, the chamfered portion being capable of abutting against an inclined stepped surface in the channel to form a sealing surface.

[0019] Optionally, the housing includes a tubular member and a connector located at one end of the tubular member, the other end of the tubular member forming a first end, and the connector forming a second end, wherein the ratio of the maximum outer diameter of the connector 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 connector located at one end of the tubular member, the other end of the tubular member forming a first end, and the connector forming a second end. The mounting portion is configured as a channel formed in the fixed scroll end plate of the compression mechanism, with a back pressure chamber provided on one side of the fixed scroll end plate. The connector includes a connecting section and a mounting section in the axial direction of the connector. The connector is configured such that the connecting section can be inserted into the channel and threadedly connected to the channel, and the mounting section is located outside the compression mechanism. The threaded portion of the connecting section is located radially outward of the compression mechanism along the radial direction of the compressor, closer to the radial outer side of the compression mechanism than the back pressure chamber.

[0021] According to another aspect of the present invention, a scroll compressor is provided, wherein the scroll compressor includes a compression mechanism having a fixed scroll and a temperature detection device as described above, the temperature detection device being disposed 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] Overall, the temperature detection device for compressors according to the present invention has a simple structure, small size, small assembly space requirement, high reliability, and high sensitivity, and is particularly suitable for small-diameter compressors with limited internal space. Attached Figure Description

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

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

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

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

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

[0029] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. This 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 the compressor is shown as a vertical scroll compressor in this embodiment, it is understood that the compressor can be any other suitable type of compressor, and is not limited to the type shown. The scroll compressor 1 includes a generally cylindrical housing, comprising a main body (not shown) located in the middle and a first end cover (not shown) and a second end cover (not shown) fixed to both axial (longitudinal) ends of the main body. A silencer cover 12 extending generally laterally (i.e., perpendicular to the axial direction of the scroll compressor 1, or radially) is also provided between the main body and the first end cover, thereby dividing the internal space of the compressor housing into a high-pressure side space and a low-pressure side space. Specifically, the space between the first end cover and the silencer cover 12 constitutes the high-pressure side space, while the space between the silencer 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 housed within the low-pressure side space.

[0031] The compression mechanism CM includes a fixed scroll 20 and a moving scroll 30 (in... Figure 1 (Only a portion is shown in the image). The motor is configured to rotate the rotating shaft, which in turn drives the moving vortex phase 30 to move about the fixed vortex 20 (i.e., the central axis of the moving vortex moves about the central axis of the fixed vortex, but the moving vortex does not rotate about its central axis).

[0032] The fixed scroll compressor 20 may include a fixed scroll end plate 21, fixed scroll blades 22 extending from one side of the fixed scroll end plate 21, and a generally cylindrical outer peripheral wall 23 disposed on the outer periphery of the fixed scroll blades 22. An exhaust port 24 for discharging compressed working fluid from the compression mechanism CM is also formed at the center of the fixed scroll end plate 21. The moving scroll compressor 30 may include a moving scroll end plate (not shown) and moving scroll blades formed on one side of the moving scroll end plate. The fixed scroll blades 22 and the moving scroll blades can engage with each other, such that a series of fluid chambers exist between the fixed scroll blades 22 and the moving scroll blades when the scroll compressor is operating. This series of fluid chambers includes an outermost suction chamber, a central exhaust chamber, and multiple intermediate compression chambers located between the suction chamber and the exhaust chamber. The central exhaust chamber communicates with the exhaust port 24. The refrigerant enters the compression mechanism CM through the suction chamber, is compressed by the multiple intermediate compression chambers, and finally enters the exhaust chamber and is discharged from the compression mechanism CM through the exhaust port 24. In addition, a back pressure cavity P can be provided on the side of the fixed vortex end plate 21 opposite to the side where the fixed vortex blade is provided, so as to achieve axial sealing between the top of the fixed vortex blade 22 and the moving vortex end plate, and between the top of the moving vortex blade and the fixed vortex end plate 21.

[0033] When a compressor operates under certain harsh conditions, excessive internal temperature may occur, affecting lubrication and leading to wear and failure of compressor components. Furthermore, for compressors with vapor injection enthalpy enhancement systems, the injection volume of the vapor injection enthalpy enhancement circuit typically needs to be precisely adjusted according to the compressor's operating conditions to improve compressor efficiency. Therefore, to improve compressor reliability and operating efficiency, it is necessary to monitor the compressor's internal temperature. For example, a temperature detection device can be installed near the exhaust port of the compression mechanism to monitor the exhaust temperature.

[0034] A temperature sensing device can be configured, for example, as a temperature probe. See also Figure 2In a first embodiment of the present invention, the temperature detection device 200 includes a body, a temperature sensor 210, a terminal block 260, and a flexible connecting wire 250. The body includes a hollow outer shell and an inner cavity defined by the outer shell. The body is elongated, including a first end and a second end opposite to the first end in its extending direction. The temperature sensor 210 is housed in the inner cavity and located at the first end. The flexible connecting wire 250 connects the temperature sensor 210 to the terminal block 260. The terminal block 260 is used to connect to a signal output device (which can be directly connected), thereby transmitting the temperature signal detected by the temperature detection device 200 to a control device. The control device may, for example, be configured as an external protector located outside the compressor, capable of determining whether the exhaust temperature is within a safe range based on the received temperature signal, thereby determining whether to activate the shutdown protection. The signal output device may, for example, be configured as a terminal block for motor leads. The flexible connecting wire 250 is arranged to extend along a direction from a first end of the body toward a second end, and includes an outer portion 252 extending beyond the second end and an inner portion 254 extending between the first and second ends and housed within the cavity of the body. The outer portion 252 is connected to a terminal 260, while the inner portion 254 is connected to a 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 inside the cavity of the body.

[0035] The housing may include a tubular component 220 and a connector 230. For example... Figure 2As shown, the tubular member 220 is constructed, for example, as a hollow steel tube, and includes a first end 221 and a second end 222 opposite to each other in its axial direction. At the first end 221 of the tubular member 220, the tube wall of the tubular member 220 may be formed by stamping to create radially inward protrusions, and the protrusions may be welded together to form a closed end, which constitutes the first end of the body (i.e., 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). A connector 230 is provided at the second end 222 of the tubular member 220. More specifically, the connector 230 is constructed as a hollow cylinder, and the second end 222 of the tubular member 220 can be inserted into the interior of the connector 230, and the second end 222 is welded to the inner wall of the connector 230 to form a sealed connection. The connector 230 includes a connecting section 232 and a mounting section 231 in its axial direction. The connecting section 232 defines a central channel for receiving the second end 222 of the tubular member, and this central channel communicates with the central channel defined by the mounting section 231. The connector 230 forms the second end of the body (i.e., the second end of the body includes the connector 230 and an inner cavity located at the connector). The inner cavity of the tubular member and the central channel defined by the mounting section 231 together form the inner cavity of the body, which is filled with a sealing material, such as resin, to achieve a seal. The sealing material can be cured to form an end cap 238 that closes the inner cavity of the body.

[0036] Preferably, the inner wall of the mounting section 231 defining its central channel may be provided with a concave-convex structure 234, thereby increasing the adhesion of the sealing material and making it less likely for the sealing material, temperature sensor 210, and flexible connecting wire 250 to loosen, shift, or detach from the inner cavity of the body. The concave-convex structure 234 may be, for example, a groove, thread, or embossing. Preferably, the end of the mounting section 231 away from the first end of the body, i.e., the end of the mounting section 231 located on the side opposite to the connecting section 232, may be formed with a flange 235. This flange 235 may be configured to extend radially inward around the central channel of the mounting section 231, or more preferably, as shown in the figure. Figure 2 The structure shown is such that the central channel around the mounting section 231 extends axially away from the connecting section 232 and then bends radially inward. This not only further increases the adhesion of the sealing material, but also forms a more robust end cap by directly filling and curing the sealing material, eliminating the need for additional end cap components and reducing the overall volume of the mounting section.

[0037] To detect the exhaust temperature at the exhaust port 24 of the compression mechanism, a temperature detection device 200 can be installed in the mounting section of the compression mechanism CM. For example, as Figure 1As shown, the mounting portion of the compression mechanism CM can be configured as a channel 25 formed in the fixed scroll end plate 21 of the fixed scroll 20 of the compression mechanism CM. This channel 25 extends substantially along the radial direction of the compression mechanism and is preferably configured to penetrate the fixed scroll end plate 21, with one end communicating with the exhaust port 24. This allows the temperature sensing device 200 (specifically, the first end of the body of the temperature sensing device 200) arranged in the through-hole 25 to be directly exposed to the exhaust port 24, thereby achieving more accurate and sensitive detection of the exhaust temperature. The other end of the channel 25 communicates with the outside of the compression mechanism CM.

[0038] When the temperature detection device 200 is installed 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 portion 252 of the flexible connecting line 250 and the terminal 260 are located outside the compression mechanism CM.

[0039] Preferably, the connecting section 232 of the connector 230 may have a threaded portion 233 formed on its outer peripheral surface for connection and fixation with a corresponding mounting component (e.g., the constant scroll of a compressor). Furthermore, the end of the connecting section 232 near the first end of the body may also have a chamfered portion 236, which surrounds the central channel of the connecting section 232 and has a beveled surface inclined relative to the central axis of the connecting section 232. The mounting section 231 may be configured as a nut for easy screwing and installation.

[0040] When the temperature sensing device 200 is installed onto the fixed scroll 20, the tubular member 220 can be inserted into the channel 25 from the outside of the fixed scroll 20. By tightening the mounting section 231 of the connector 230, the threaded portion 233 of the connecting section 232 is fixedly connected to the corresponding mounting surface of the fixed scroll (e.g., the threaded mounting surface in the channel 25). After the temperature sensing device 200 is installed, the beveled portion 236 of the connecting section 232 abuts against the corresponding stepped surface of the fixed scroll (e.g., the inclined stepped surface in the channel 25), thereby sealing the channel 25. After the temperature sensing device 200 is installed, the connecting section 232 of the tubular member 220 and the connector 230 is located in the channel 25 of the fixed scroll 20, while the mounting section 231 of the connector 230 is located outside the fixed scroll. To accommodate the mounting section 231 of the connector 230, as well as at least a portion of the flexible connecting wire 250 and the terminal block 260, it is typically necessary to remove a portion of the material from the radially outer portion of the fixed scroll 20 (including the fixed scroll end plate and / or outer peripheral wall) to obtain mounting space. For example, a material removal portion 27 of the fixed scroll 20 can be formed around the opening of the channel 25 on the radially outer surface of the fixed scroll, and the mounting section 231 can be at least partially accommodated within the material removal portion 27.

[0041] Preferably, the ratio of the maximum outer diameter D of the connector 230 (e.g., the outer diameter of the mounting section configured as 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, thereby ensuring the scroll strength.

[0042] Preferably, after the temperature detection device 200 is installed, the threaded portion 233 of the connecting section 232 inserted into the hole 25 of the fixed vortex 20 is located at a position closer to the radial outer side of the compression mechanism than the back pressure chamber P along the radial direction of the compressor. That is, the threaded portion 233 does not extend below the back pressure chamber P, thereby further ensuring the vortex strength.

[0043] like Figure 1 As shown, the outer portion 252 of the flexible connecting wire 250 can bend and droop downwards, preventing interference with other components of the compressor when the terminal 260 is connected to the signal output device. Specifically, the length and tolerance of the outer portion 252 of the flexible connecting wire 250 need to be controlled, with its length configured such that the outer portion 252, the terminal 260, and the signal output device do not contact the compressor's muffler cover 12 and housing. The temperature detection device according to the invention is particularly suitable for small-bore compressors with cylinder diameters between 160 mm and 230 mm.

[0044] The following will combine Figure 4 The comparative examples shown further illustrate the advantages of the temperature detection device according to the first embodiment of the present invention.

[0045] Figure 4A compressor 1' according to a comparative example is shown, wherein 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 again here. In this comparative example, a channel 25' is formed in the constant scroll end plate 21 of the constant scroll 20 of the compressor 1', in which a temperature detection device 100 can be installed. The temperature detection device 100 includes a body, a temperature sensor (not shown), a connecting wire (not shown), and a metal pin 160. The body includes a hollow outer shell and an inner cavity defined by the outer shell. The body is elongated and includes a first end and a second end opposite to the first end in its extending direction. The temperature sensor is housed in the inner cavity and located at the first end. The metal pin 160 is fixed to the outer shell at the second end and extends away from the outer shell. The connecting wire is arranged in the inner cavity and connects the temperature sensor to the metal pin 160. The metal pin 160 (male) is used to connect to a female connector, such as a motor lead, to output a temperature signal to an external temperature protector. Because the connection between the metal pin 160 and the female end of the motor lead is a rigid connection, a large space is required during assembly, which can easily cause interference with the muffler cover 12 or the housing. Furthermore, the connection angle of the metal pin 160 is fixed and cannot be adjusted. If the temperature detection device 100 is improperly assembled, the incorrect orientation of the metal pin 160 can lead to severe interference between the female end of the motor lead and other components, such as the muffler cover, preventing installation. In contrast, in the first embodiment of the present invention, since the outer part 252 of the flexible connecting wire 250 and the terminal 260 are located outside the body of the temperature detection device 200, and the length of the outer part 252 of the flexible connecting wire 250 is controlled, the outer part 252, the terminal 260, and the signal output device do not contact the muffler cover 12 and the compressor housing, thereby avoiding assembly interference. In particular, the outer part 252, the terminal 260, and the signal output device are located away from the weld seam between the muffler cover 12 and the compressor housing, thereby preventing welding heat from damaging the temperature detection device.

[0046] In addition, such as Figure 4As shown, in the comparative example, the housing of the temperature sensing device 100 includes a tubular member 120 and a connector 130. Similar to the first embodiment of the present invention, the connector 130 may also be constructed as a hollow cylinder and includes a connecting section 132 and a mounting section 131 in its axial direction. The connecting section 132 may have a threaded portion formed on its outer peripheral surface, so that when inserted into the hole 25' of the fixed scroll end plate, it engages with the threaded portion formed on the inner wall surface of the hole 25' to fix the temperature sensing device 100 to the fixed scroll 20. Furthermore, unlike 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 connector 130 also includes an end cap 133 located at the end of the connector (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 to the end cap 133. On the one hand, since the metal pin 160 and the end cap 133 are in the radial direction of the compression mechanism CM (in Figure 4 The dimensions on the horizontal axis are relatively large, so the temperature sensing device 100 usually needs to be positioned as much as possible towards the radial inward of the fixed vortex to avoid interference between the metal pin and the motor lead female connected to the metal pin and other components (although in Figure 4 Although not explicitly shown, those skilled in the art will understand that the temperature detection device 100 is configured to be moved to the left as a whole, thereby leaving more installation space on the right side. Consequently, the threaded connection section 132 can easily extend into the thinner section of the fixed scroll end plate 21 (e.g., the section of the fixed scroll end plate 21 located below the back pressure chamber P), concentrating the stress generated by the threaded connection in the thinner section of the scroll end plate 21, posing a greater challenge to scroll strength safety. On the other hand, the metal pin 160 and the end cap 133 are in the axial direction of the compression mechanism CM (in... Figure 4 The dimensions (shown in the vertical direction) are also relatively large. In order to accommodate the mounting section 131 and end cap 133 of the connector 130, a significant amount of material needs to be removed from the radially outer portion of the fixed vortex 20 to allow more installation space for the connection between the metal pin and the motor lead female. That is, the material removal portion 27' of the fixed vortex 20 is large, which will also have an adverse effect on the vortex strength.

[0047] In contrast, in the first embodiment of the present invention, the end cap of the connector is omitted from the temperature sensing device 200. Furthermore, by replacing the metal pin with a flexible connecting wire and a terminal block, the space occupied by the portion of the temperature sensing device near the second end (including the connector and the portion located radially outward of the connector; in the first embodiment of the present invention, this is the connector 230, the outer portion 252 of the flexible connecting wire, and the terminal block 260; in the comparative example, it is the connector 130 and the metal pin 160) in the radial direction of the compression mechanism is reduced. Simultaneously, the dimension of the mounting section 230 of the temperature sensing device 200 in the axial direction of the compression mechanism is also reduced. Therefore, on the one hand, the temperature sensing device 200 can be positioned closer to the radial outward of the compression mechanism than the overall position of the temperature sensing device 100 within the compression mechanism, thereby reducing or preventing the threaded connecting section 232 from extending into the thinner section of the fixed vortex end plate 21, thus improving the vortex strength. On the other hand, the material removal section 27 of the fixed scroll 20 used to accommodate the mounting section 230 can also be reduced accordingly, thereby further increasing the scroll strength without changing the scroll thickness, making the compressor less risky when using high-pressure refrigerants, such as R32.

[0048] Furthermore, in the temperature detection device 100 of the comparative example, the temperature sensor is connected to a connecting wire, which needs to be soldered to a metal pin. The metal pin is then connected to the female connector of the motor lead to output the temperature signal, resulting in numerous intermediate connection points. In contrast, in the first embodiment of the present invention, the temperature detection device 200 directly connects the temperature sensor to the motor lead via a flexible connecting wire and a terminal block, reducing intermediate connection points and thus decreasing the risk of temperature detection device failure.

[0049] In contrast, in the comparative example, the channel 25' for mounting the temperature sensing device in the fixed scroll end plate 21 is constructed as a countersunk hole extending from the radially outer surface of the fixed scroll end plate 21 toward the exhaust port 24, with one end of the channel 25' close to the exhaust port 24 but not directly connected to it. That is, a partition wall 28 exists between the channel 25' and the exhaust port 24, thereby isolating the high-pressure side (i.e., the exhaust port of the compression mechanism) from the low-pressure side (i.e., the exterior of the compression mechanism CM). In contrast, in the first embodiment of the present invention, the channel 25' for mounting the temperature sensing device in the fixed scroll end plate 21 is constructed as a through hole, allowing the first end of the temperature sensing device 200 to be positioned closer to the exhaust port 24, or even directly extending into the exhaust port 24, thereby further improving the sensitivity of the temperature sensing device. In addition, the temperature detection device 200 forms a sealing surface by abutting the inclined stepped surface in the channel 25 through the oblique cut portion 236 of the connector 230, thereby preventing the fluid on the high-pressure side from leaking to the low-pressure side through the gap between the inner wall surface of the channel 25 and the outer surface of the temperature detection device, thus achieving isolation between the high-pressure side and the low-pressure side. The structure is simple and easy to install.

[0050] Those skilled in the art will understand that the present invention is not limited to the form shown in the first embodiment. For example, in... Figure 3 In the second embodiment of the present invention shown, the housing of the temperature detection device can be constructed as a single unit comprising the tubular member 320 and the connector 330 to further simplify installation, rather than as shown in the second embodiment. Figure 2 The two separate components, tubular member 220 and connector 230, are shown connected to each other. Furthermore, in the second embodiment of the invention, at the first end 321 of tubular member 320, the tubular member 320 can be formed into a closed end by deep drawing. This method of forming the end not only further reduces the risk of end leakage, but also results in a smaller end volume and smaller diameter. Therefore, the temperature sensor can be positioned closer to the end wall of the housing at the first end of the body, allowing the temperature sensor to be closer to the exhaust port of the compressor and the working fluid in the exhaust port when the temperature sensing device is installed in the mounting hole of the constant vortex, thereby further improving the sensitivity of the temperature sensor.

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

Claims

1. A temperature detecting device (200) for a compressor, the compressor including a compression mechanism provided with a mounting portion and a discharge port (24), the temperature detecting device comprising: a body including a hollow casing and an inner cavity defined by the casing, the body including a first end portion and an opposite second end portion; a temperature sensor (210) housed in the inner cavity and located at the first end portion; a terminal (260); and a flexible connecting line (250) connecting the temperature sensor with the terminal, wherein the flexible connecting line is arranged to extend along a direction from the first end portion toward the second end portion and includes an outer portion (252) extending beyond the second end portion and connected with the terminal, such that the outer portion and the terminal are located outside the body, wherein the temperature detecting device is mountable in the mounting portion and arranged such that the first end portion is proximate to the discharge port (24) and the outer portion and the terminal are located outside the compression mechanism.

2. The temperature detection device (200) for a compressor according to claim 1, wherein, the terminal is connectable with a signal output device outside the compression mechanism, and a length of the outer portion is configured such that the outer portion, the terminal and the signal output device are not in contact with a muffling cover (12) and a housing of the compressor.

3. The temperature detection device (200) for a compressor according to claim 1, wherein, the mounting portion is configured as a channel (25) formed in a fixed scroll end plate (21) of the compression mechanism, one end of the channel being communicated with the discharge port, such that the first end portion is directly exposed to the discharge port.

4. The temperature detection device (200) for a compressor according to claim 3, wherein, the first end portion is mountable to protrude from one end of the channel and be located within the discharge port.

5. The temperature detection device (200) for a compressor according to any one of claims 1 to 4, wherein the casing includes a tubular member (220, 320) and a joint member (230, 330) at one end portion of the tubular member, the other end portion (221, 321) of the tubular member being configured to constitute the first end portion, the joint member being configured to constitute the second end portion and to be connected with the compression mechanism.

6. The temperature detection device (200) for a compressor according to claim 5, wherein the other end portion (221, 321) of the tubular member: is formed as a closed end portion by stamping and welding, or is formed as a closed end portion by deep drawing.

7. The temperature detection device (200) for a compressor according to claim 5, wherein, the joint member is configured as a hollow cylinder, a concave-convex structure (234) is provided on an inner wall of the joint member, and / or a distal end of the joint member distal from the first end portion is formed as a flange (235).

8. The temperature detection device (200) for a compressor according to claim 5, wherein, the tubular member and the joint member are integrally formed.

9. The temperature detection device (200) for a compressor according to any one of claims 1 to 4, wherein a portion of the flexible connecting line is housed in the inner cavity, the inner cavity being filled with a sealing material that is curable to form an end cap portion (238) closing the inner cavity.

10. The temperature detection device (200) for a compressor according to claim 1 or 2, wherein, the casing includes a tubular member (220, 320) and a joint member (230, 330) at one end portion of the tubular member, the other end portion (221, 321) of the tubular member being configured to constitute the first end portion, the joint member being configured to constitute the second end portion, wherein the mounting portion is configured as a channel (25) formed in a fixed scroll end plate (21) of the compression mechanism, The joint member includes a chamfered portion (236) near the first end portion, which can abut against an inclined step surface in the hole to form a sealing surface.

11. The temperature detection device (200) for a compressor according to claim 1 or 2, wherein, The housing includes a tubular member (220, 320) and a joint member (230, 330) at one end of the tubular member, the other end (221, 321) of the tubular member being configured to form the first end portion, and the joint member being configured to form the second end portion, The mounting portion is configured as a hole (25) formed in a fixed scroll end plate (21) of the compression mechanism, 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.

12. The temperature detection device (200) for a compressor according to claim 1 or 2, wherein, The housing includes a tubular member (220, 320) and a joint member (230, 330) at one end of the tubular member, the other end (221, 321) of the tubular member being configured to form the first end portion, and the joint member being configured to form the second end portion, The mounting portion is configured as a hole (25) formed in a fixed scroll end plate (21) of the compression mechanism, one side of the fixed scroll end plate being provided with a back pressure cavity (P), The joint member includes a connecting section and a mounting section in the axial direction of the joint member, the joint member being configured such that the connecting section can be inserted into the hole and threadedly connected with the hole, and the mounting section is located outside the compression mechanism, and a threaded portion (233) of the connecting section (232) is provided at a position closer to the radially outer side of the compression mechanism than the back pressure cavity in the radial direction of the compressor.

13. A scroll compressor (1), wherein The scroll compressor includes a compression mechanism having a fixed scroll and a temperature detection device (200) according to any one of claims 1 to 12, which is provided in the fixed scroll for detecting the temperature of a discharge port (24) of the compression mechanism.

14. The scroll compressor (1) of claim 13, wherein, The cylinder diameter of the scroll compressor is in the range of 160mm to 230mm.

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