A compressor with a built-in exhaust temperature protection system and its control method

Abstract

The present invention discloses a compressor with a built-in exhaust temperature protection system and its control method. Among them, the compressor with the built-in exhaust temperature protection system includes: a housing, a compressor body, a controller, and a temperature sensing device. The compressor body is arranged inside the housing. An installation space is formed inside the housing, and the controller is installed in the installation space. The controller is used to control the operation of the compressor body. The temperature sensing device is arranged near the exhaust port of the compressor body, and the temperature sensing device is communicatively connected to the controller. By applying the present invention, the exhaust temperature of the compressor can be accurately and timely detected, and it cooperates with the controller to form real-time regulation of the operation of the compressor. At the same time, this new structure is simple and convenient to install.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor with a built-in exhaust temperature protection system and a control method thereof. Background Art

[0002] Compressors are widely used in various industrial products. During their actual use, the exhaust temperature of the compressor is a technical parameter that needs to be focused on. Reasons such as exceeding the operating range of the compressor, fan blockage, and refrigerant leakage may all cause the exhaust temperature to exceed the tolerance range of the compressor, thereby leading to the damage of the compressor. On the one hand, too high an exhaust temperature will cause problems such as lubricating oil deterioration, sealing material failure, and excessive thermal deformation of metal materials. On the other hand, reasons such as too large an opening degree of the expansion valve and too much refrigerant filling amount may cause liquid return in the suction gas, resulting in too low an exhaust temperature, and a large amount of liquid return in the suction gas is the main cause of the failure of the bearing system and scroll plate of the compressor. However, there is currently a lack of a compressor structure with a good real-time temperature detection function. Summary of the Invention

[0003] In view of this, to solve the above problems, the object of the present invention is to provide a compressor with a built-in exhaust temperature protection system, including: a housing, a compressor body, a controller, and a temperature sensing device. The compressor body is arranged inside the housing. An installation space is formed inside the housing, and the controller is installed in the installation space. The controller is used to control the operation of the compressor body. The temperature sensing device is arranged near the exhaust port of the compressor body, and the temperature sensing device is communicatively connected to the controller.

[0004] In another preferred embodiment, the compressor body includes: a stationary scroll, a moving scroll, a motor drive mechanism, and an isolation structure. The stationary scroll, the moving scroll, the motor drive mechanism, and the isolation structure are all arranged inside the housing. The stationary scroll matches the moving scroll. The motor drive mechanism is connected to the moving scroll. The motor drive mechanism is used to drive the rotation of the moving scroll. The isolation structure is arranged on the side of the motor drive mechanism away from the moving scroll. The isolation structure divides the interior of the housing into a containing space and the installation space. The stationary scroll, the moving scroll, and the motor drive mechanism are all arranged in the containing space, and the exhaust port is formed on the stationary scroll.

[0005] In another preferred embodiment, a first channel is formed in the stationary scroll. One end of the first channel is disposed near the center of the stationary scroll, and the temperature sensing device is installed at one end of the first channel. The other end of the first channel is disposed near the edge of the stationary scroll. A second channel is formed on the inner side of the housing. One end of the first channel is communicated with one end of the second channel, and the other end of the second channel extends into the installation space. The temperature sensing device and the controller are communicatively connected through a circuit successively passing through the first channel and the second channel.

[0006] In another preferred embodiment, the first channel includes an inward extension section and a lateral extension section. The inward extension section is disposed along the radial direction of the stationary scroll, and the lateral extension section is disposed along the axial direction of the stationary scroll. One end of the inward extension section is disposed near the exhaust port, and the temperature sensing device is disposed inside one end of the inward extension section. The other end of the inward extension section is connected to one end of the lateral extension section, and the other end of the lateral extension section is connected to one end of the second channel.

[0007] In another preferred embodiment, the inward extension section is disposed on the surface of the stationary scroll on the side away from the moving scroll. A first groove is formed on the surface of the stationary scroll along the radial direction, and the first groove is communicated with the lateral extension section. The inward extension section is formed inside the first groove.

[0008] In another preferred embodiment, the inward extension section is disposed inside the stationary scroll on the side away from the moving scroll. A blind hole is formed on the stationary scroll along the radial direction, and the blind hole is communicated with the lateral extension section. The inward extension section is formed inside the blind hole.

[0009] In another preferred embodiment, the lateral extension section is disposed on the circumferential side wall of the stationary scroll. A second groove is formed on the circumferential side wall of the stationary scroll along the axial direction of the stationary scroll. Two ends of the second groove are respectively connected to the inward extension section and the second channel. The lateral extension section is formed inside the second groove.

[0010] In another preferred embodiment, the lateral extension section is disposed inside the stationary scroll. A through hole is formed at the outer edge of the side of the stationary scroll near the moving scroll. Two ends of the through hole are respectively connected to the inward extension section and the second channel. The lateral extension section is formed inside the through hole.

[0011] In another preferred embodiment, an exhaust cavity is formed between the inner side of the housing and the stationary scroll. A seal is further disposed inside the housing. The seal covers the side of the stationary scroll away from the moving scroll, and the seal covers the first groove. The seal isolates the first groove from the exhaust cavity.

[0012] In another preferred embodiment, it further includes: a plugging member, which is embedded at one end of the blind hole away from the exhaust port.

[0013] The present invention also provides a control method for a compressor with a built-in exhaust temperature protection system, including the compressor with the built-in exhaust temperature protection system described in any one of the above, and further including: an air conditioning system and an exhaust pressure sensor. The compressor with the built-in exhaust temperature protection system is connected to the air conditioning system, the controller is communicatively connected to the air conditioning system, the exhaust pressure sensor is disposed inside the housing and is disposed near the exhaust port, and the exhaust pressure sensor is communicatively connected to the controller;

[0014] The control method specifically includes the following steps:

[0015] Step S1, input a temperature threshold, a temperature change rate threshold, a pressure threshold, and a maximum compressor speed to the controller;

[0016] Step S2, control the compressor body to start working through the controller;

[0017] Step S3, the controller obtains the current temperature measurement value in real time through the temperature sensing device and obtains the current pressure measurement value in real time through the pressure sensor;

[0018] Step S4, the controller determines whether the temperature measurement value is greater than the temperature threshold. If so, it proceeds to step S5; if not, it returns to step S3;

[0019] Step S5, the controller determines whether the pressure measurement value is greater than the pressure threshold. If so, it proceeds to step S6; if not, it proceeds to step S7;

[0020] Step S6, the controller sends an instruction message to the air conditioning system, and the instruction message is used to control the air conditioning system to lower the set air outlet temperature or increase the air outlet speed, and then returns to step S3;

[0021] Step S7, the controller calculates the exhaust temperature change rate per unit time, and determines whether the exhaust temperature change rate is greater than the temperature change rate threshold. If so, it proceeds to step S8; if not, it proceeds to step S9;

[0022] Step S8, the controller sends a warning message to the user and stops the operation of the compressor body;

[0023] Step S9, the controller obtains the current speed of the compressor body and compares whether the current speed is greater than or equal to the maximum compressor speed. If so, it proceeds to step S10; if not, it proceeds to step S11;

[0024] Step S10, the controller sends a warning message to the user and stops the operation of the compressor body;

[0025] Step S11, increase the rotational speed of the compressor body and return to Step S3.

[0026] Due to the adoption of the above technical solution, the present invention has the following positive effects compared with the prior art: through the application of the present invention, the exhaust temperature of the compressor is accurately and timely detected, and it cooperates with the controller to form real-time regulation of the operation of the compressor; at the same time, the new structure is simple and convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. is an embodiment of a compressor with a built-in exhaust temperature protection system according to the present invention;

[0028] Figure 2 FIG. is another embodiment of a compressor with a built-in exhaust temperature protection system according to the present invention.

[0029] In the drawings:

[0030] 1, housing; 2, compressor body; 21, stationary scroll; 22, moving scroll; 23, motor drive mechanism; 24, isolation structure; 25, exhaust port; 3, first channel; 4, second channel; 31, inner extension section; 32, side extension section; 33, first groove; 34, blind hole; 35, through hole; 14, exhaust cavity; 11, front shell; 12, middle shell; 13, rear shell; 51, first sealing groove; 52, second sealing groove; 53, third sealing groove; 54, fourth sealing groove; 6, inner clamping plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The present invention will be further described below in conjunction with the drawings and specific embodiments, but it is not limited to the present invention.

[0032] As Figure 1 shown, a compressor with a built-in exhaust temperature protection system of a preferred embodiment is shown, which is characterized in that it includes: a housing 1, a compressor body 2, a controller and a temperature sensing device. The compressor body 2 is disposed in the housing 1. An installation space is formed in the housing 1, and a controller is installed in the installation space. The controller is used to control the operation of the compressor body 2. The temperature sensing device is disposed near the exhaust port 25 of the compressor body 2, and the temperature sensing device is communicatively connected to the controller.

[0033] Further, as a preferred embodiment, the compressor body 2 includes: a stationary scroll 21, a moving scroll 22, a motor drive mechanism 23, and an isolation structure 24. The stationary scroll 21, the moving scroll 22, the motor drive mechanism 23, and the isolation structure 24 are all arranged inside the housing 1. The stationary scroll 21 matches the moving scroll 22. The motor drive mechanism 23 is connected to the moving scroll 22. The motor drive mechanism 23 is used to drive the rotation of the moving scroll 22. The isolation structure 24 is arranged on the side of the motor drive mechanism 23 away from the moving scroll 22. The isolation structure 24 divides the interior of the housing 1 into an accommodation space and an installation space. The stationary scroll 21, the moving scroll 22, and the motor drive mechanism 23 are all arranged in the accommodation space. An exhaust port 25 is formed on the stationary scroll 21.

[0034] Further, as a preferred embodiment, the motor drive mechanism 23 includes: a motor stator, a motor rotor, and a crankshaft structure. The motor stator is fixedly installed on the inner wall of the housing 1. The motor rotor is matched and installed with the motor stator. The crankshaft structure is fixedly connected to the motor rotor.

[0035] Further, as a preferred embodiment, a first channel 3 is formed on the stationary scroll 21. One end of the first channel 3 is arranged close to the center of the stationary scroll 21. A temperature sensing device is installed at one end of the first channel 3. The other end of the first channel 3 is arranged close to the edge of the stationary scroll 21. A second channel 4 is arranged on the inner side of the housing 1. One end of the first channel 3 is communicated with one end of the second channel 4. The other end of the second channel 4 extends into the installation space. The temperature sensing device and the controller are communicatively connected through a line passing through the first channel 3 and the second channel 4 in sequence.

[0036] Further, as a preferred embodiment, the temperature sensing device is a PTC sensor.

[0037] Further, as a preferred embodiment, the controller is a motor controller or an inverter.

[0038] Further, as a preferred embodiment, the controller includes: a main controller and an inverter. The inverter is connected to the motor drive structure through a line. The inverter is used to directly control the operation of the motor drive structure. The inverter is connected to the main controller through a line. The main controller is connected to the temperature sensing device through a line

[0039] Combined Figure 1 and Figure 2As shown, further, as a preferred embodiment, the first channel 3 includes an inward extension section 31 and a lateral extension section 32. The inward extension section 31 is arranged along the radial direction of the stationary scroll 21, and the lateral extension section 32 is arranged along the axial direction of the stationary scroll 21. One end of the inward extension section 31 is arranged close to the exhaust port 25, the temperature sensing device is arranged inside one end of the inward extension section 31, the other end of the inward extension section 31 is connected to one end of the lateral extension section 32, and the other end of the lateral extension section 32 is connected to one end of the second channel 4.

[0040] Further, as a preferred embodiment, the inward extension section 31 is arranged on the surface of the stationary scroll 21 on the side away from the moving scroll 22. A first groove 33 is radially formed on the surface of the stationary scroll 21, and the first groove 33 is communicated with the lateral extension section 32. The inward extension section 31 is formed inside the first groove 33.

[0041] Further, as a preferred embodiment, the inward extension section 31 is arranged inside the stationary scroll 21 on the side away from the moving scroll 22. A blind hole 34 is radially formed on the stationary scroll 21, and the blind hole 34 is communicated with the lateral extension section 32. The inward extension section 31 is formed inside the blind hole 34.

[0042] Further, as a preferred embodiment, the lateral extension section 32 is arranged on the circumferential side wall of the stationary scroll 21. A second groove is axially formed on the circumferential side wall of the stationary scroll 21. Two ends of the second groove are respectively connected to the inward extension section 31 and the second channel 4. The lateral extension section 32 is formed inside the second groove.

[0043] Further, as a preferred embodiment, the lateral extension section 32 is arranged inside the stationary scroll 21. A through hole 35 is formed at the outer edge of the side of the stationary scroll 21 close to the moving scroll 22. Two ends of the through hole 35 are respectively connected to the inward extension section 31 and the second channel 4. The lateral extension section 32 is formed inside the through hole 35.

[0044] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention accordingly.

[0045] The present invention further has the following implementation manners on the above basis:

[0046] In a further embodiment of the present invention, an exhaust cavity 14 is formed between the inner side of the housing 1 and the stationary scroll 21. A sealing member is further arranged inside the housing 1. The sealing member covers the side of the stationary scroll 21 away from the moving scroll 22, and the sealing member covers the first groove 33. The sealing member isolates the first groove 33 from the exhaust cavity 14.

[0047] In a further embodiment of the present invention, it further includes a plugging member, and the plugging member is embedded at one end of the blind hole 34 away from the exhaust port 25.

[0048] In a further embodiment of the present invention, the housing 1 includes a front shell 11, a middle shell 12, and a rear shell 13 arranged in sequence. One end of the front shell 11 is fixedly connected to the outer edge of one side of the stationary scroll 21, and the outer edge of the other side of the stationary scroll 21 is fixedly connected to one end of the middle shell 12. The other end of the middle shell 12 is connected to the rear shell 13.

[0049] In a further embodiment of the present invention, the isolation structure 24 is in a closed connection with the inner edge of the end of the middle shell 12 away from the front shell 11, and the above-mentioned installation space is formed inside the rear shell 13.

[0050] In a further embodiment of the present invention, the second channel 4 is a tubular structure or is directly formed by axially opening a hole in the middle shell 12.

[0051] In a further embodiment of the present invention, it further includes: an inner splint 6, which is arranged closely on one side of the middle shell 12 body, and a second channel 4 is formed by sealing cooperation between the inner splint 6 and the inner wall of the middle shell 12.

[0052] In a further embodiment of the present invention, a first sealing groove 51 is provided on the front shell 11, and a first sealing strip is arranged in the first sealing groove 51. The first sealing strip seals the gap between the front shell 11 and the stationary scroll 21.

[0053] In a further embodiment of the present invention, a second sealing groove 52 is provided on the middle shell 12, and a second sealing strip is arranged in the second sealing groove 52. The second sealing strip seals the gap between the middle shell 12 and the stationary scroll 21.

[0054] In a further embodiment of the present invention, a third sealing groove 53 is provided on the middle shell 12 body, and a third sealing strip is arranged in the third sealing groove 53. The third sealing strip seals the gap between the middle shell 12 and the rear shell 13.

[0055] In a further embodiment of the present invention, fourth sealing grooves 54 are formed at both ends of the second channel 4, and fourth sealing strips are arranged in the fourth sealing grooves 54. One fourth sealing strip is used to seal the closure between the second channel 4 and the first channel 3, and the other fourth sealing strip is used to seal the gap between the second channel 4 and the rear shell 13 body.

[0056] In a further embodiment of the present invention, an access port is formed at the edge of the side of the rear shell 13 close to the middle shell 12, and the access port is communicated with the second channel 4.

[0057] Based on the above compressor structure, the present invention correspondingly provides a control method for a compressor with a built-in discharge temperature protection system, which is used to better protect the internal structure of the compressor and facilitate the automatic regulation of the compressor. In particular, during the process of the cooperation between the compressor and the corresponding air-conditioning system, specifically, it further includes: an air-conditioning system and an exhaust pressure sensor. The compressor with the built-in discharge temperature protection system is connected to the air-conditioning system, the controller is communicatively connected to the air-conditioning system, the exhaust pressure sensor is arranged in the housing and is arranged close to the exhaust port 25, and the exhaust pressure sensor is communicatively connected to the controller;

[0058] The control method specifically includes the following steps:

[0059] Step S1, input a temperature threshold, a temperature change rate threshold, a pressure threshold, and a maximum compressor speed to the controller;

[0060] Step S2, control the compressor body 2 to start working through the controller;

[0061] Step S3, the controller obtains the current temperature measurement value in real time through the temperature sensing device and obtains the current pressure measurement value in real time through the pressure sensor;

[0062] Step S4, the controller determines whether the temperature measurement value is greater than the temperature threshold. If so, it proceeds to step S5; if not, it returns to step S3;

[0063] Step S5, the controller determines whether the pressure measurement value is greater than the pressure threshold. If so, it proceeds to step S6; if not, it proceeds to step S7;

[0064] Step S6, the controller sends a command message to the air-conditioning system. The command message is used to control the air-conditioning system to lower the set outlet temperature or increase the outlet air speed, and returns to step S3;

[0065] Step S7, the controller calculates the exhaust temperature change rate per unit time. When the exhaust temperature change rate is greater than the temperature change rate threshold, it proceeds to step S8; if not, it proceeds to step S9;

[0066] Step S8, the controller sends a warning message to the user and stops the operation of the compressor body;

[0067] Step S9, the controller obtains the current speed of the compressor body 2 and compares whether the current speed is greater than or equal to the maximum compressor speed. If so, it proceeds to step S10; if not, it proceeds to step S11;

[0068] Step S10, the controller sends a warning message to the user and stops the operation of the compressor body 2;

[0069] Step S11, increase the speed of the compressor body 2 and return to step S3.

[0070] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention thereby. For those skilled in the art, it should be realized that all the solutions obtained by equivalent substitutions and obvious changes made by using the specification and illustrated content of the present invention should be included within the protection scope of the present invention.

Claims

1. A control method for a compressor with a built-in discharge temperature protection system, the compressor with the built-in discharge temperature protection system comprising: A housing, a compressor body, a controller, and a temperature sensing device. The compressor body is disposed within the housing. An installation space is formed within the housing, and the controller is installed within the installation space. The controller is used to control the operation of the compressor body. The temperature sensing device is disposed near the exhaust port of the compressor body, and the temperature sensing device is communicatively connected to the controller; Characterized in that it further includes: an air conditioning system and an exhaust pressure sensor. The compressor with the built-in exhaust temperature protection system is connected to the air conditioning system. The controller is communicatively connected to the air conditioning system. The exhaust pressure sensor is disposed within the housing and is disposed near the exhaust port. The exhaust pressure sensor is communicatively connected to the controller; The control method specifically includes the following steps: Step S1, input a temperature threshold, a temperature change rate threshold, a pressure threshold, and a maximum compressor speed to the controller; Step S2, control the compressor body to start operating through the controller; Step S3, the controller obtains the current temperature measurement value in real time through the temperature sensing device and obtains the current pressure measurement value in real time through the pressure sensor; Step S4, the controller determines whether the temperature measurement value is greater than the temperature threshold. If so, proceed to step S5; if not, return to step S3; Step S5, the controller determines whether the pressure measurement value is greater than the pressure threshold. If so, proceed to step S6; if not, proceed to step S7; Step S6, the controller sends an instruction message to the air conditioning system. The instruction message is used to control the air conditioning system to lower the set outlet air temperature or increase the outlet air speed, and return to step S3; Step S7, the controller calculates the exhaust temperature change rate per unit time. When the exhaust temperature change rate is greater than the temperature change rate threshold, proceed to step S8; if not, proceed to step S9; Step S8, the controller sends a warning message to the user and stops the operation of the compressor body; Step S9, the controller obtains the current speed of the compressor body and compares whether the current speed is greater than or equal to the maximum compressor speed. If so, proceed to step S10; if not, proceed to step S11; Step S10, the controller sends a warning message to the user and stops the operation of the compressor body; Step S11, increase the speed of the compressor body and return to step S3.

2. The control method of the compressor with a built-in exhaust temperature protection system according to claim 1, characterized in that, The compressor body includes: a stationary scroll, a moving scroll, a motor driving mechanism, and an isolation structure. The stationary scroll, the moving scroll, the motor driving mechanism, and the isolation structure are all disposed within the housing. The stationary scroll matches the moving scroll. The motor driving mechanism is connected to the moving scroll. The motor driving mechanism is used to drive the rotation of the moving scroll. The isolation structure is disposed on the side of the motor driving mechanism away from the moving scroll. The isolation structure divides the interior of the housing into a receiving space and the installation space. The stationary scroll, the moving scroll, and the motor driving mechanism are all disposed within the receiving space. The exhaust port is formed on the stationary scroll.

3. The control method of the compressor with the built-in exhaust temperature protection system according to claim 2, characterized in that, A first channel is formed in the stationary scroll. One end of the first channel is disposed near the center of the stationary scroll, and the temperature sensing device is installed at one end of the first channel. The other end of the first channel is disposed near the edge of the stationary scroll. A second channel is provided on the inner side of the housing. One end of the first channel is communicated with one end of the second channel. The other end of the second channel extends into the installation space. The temperature sensing device and the controller are communicatively connected through a circuit that sequentially passes through the first channel and the second channel.

4. The control method of the compressor with a built-in exhaust temperature protection system according to claim 3, characterized in that, The first channel includes an inward extension section and a lateral extension section. The inward extension section is arranged along the radial direction of the stationary scroll, and the lateral extension section is arranged along the axial direction of the stationary scroll. One end of the inward extension section is disposed near the exhaust port, and the temperature sensing device is disposed inside one end of the inward extension section. The other end of the inward extension section is connected to one end of the lateral extension section, and the other end of the lateral extension section is connected to one end of the second channel.

5. The control method of the compressor with a built-in exhaust temperature protection system according to claim 4, characterized in that, The inward extension section is disposed on the surface of the stationary scroll on the side away from the moving scroll. A first groove is formed on the surface of the stationary scroll along the radial direction, and the first groove is communicated with the lateral extension section. The inward extension section is formed in the first groove.

6. The control method of the compressor with a built-in exhaust temperature protection system according to claim 4, characterized in that, The inward extension section is disposed inside the stationary scroll on the side away from the moving scroll. A blind hole is formed on the stationary scroll along the radial direction, and the blind hole is communicated with the lateral extension section. The inward extension section is formed in the blind hole.

7. The control method of the compressor with a built-in exhaust temperature protection system according to claim 4, characterized in that, The lateral extension section is disposed inside the stationary scroll. A through hole is formed at the outer edge of the side of the stationary scroll close to the moving scroll. Two ends of the through hole are respectively connected to the inward extension section and the second channel. The lateral extension section is formed in the through hole.

8. The control method of the compressor with a built-in exhaust temperature protection system according to claim 5, characterized in that, An exhaust cavity is formed between the inner side of the housing and the stationary scroll. A sealing member is further provided inside the housing. The sealing member covers the side of the stationary scroll away from the moving scroll, and the sealing member covers the first groove. The sealing member isolates the first groove from the exhaust cavity.

9. The control method of the compressor with a built-in exhaust temperature protection system according to claim 6, characterized in that, Further included is: A plugging member, which is embedded at one end of the blind hole away from the exhaust port.

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