KR102189168B1 - Compressor assembly and its control method and cooling/heating system - Google Patents

Abstract

A compressor assembly 1 is disclosed, such a compressor assembly comprising a compressor 10 configured to compress a working fluid from an intake pressure to a discharge pressure, an expansion device 30 configured to expand the working fluid condensed by the condenser 20 , A heat exchanger (40) configured to deliver the lubricant that lubricates the compressor (10) to the expanded working fluid by the expansion device (30) to cool the lubricant and to heat the working fluid expanded by the expansion device (30) , The first sensing device 50 configured to detect the temperature of the lubricant cooled by the heat exchanger 40, and the operation of the compressor assembly 1 according to the temperature of the lubricant detected by the first sensing device 50. And a controller configured to control.

Description

Compressor assembly and its control method and cooling/heating system

This application is the priority of Chinese Patent Application No. 201611007783.1, filed on November 16, 2016 with the China National Intellectual Property Office, the name "COMPRESSOR ASSEMBLY AND CONTROL METHOD THEREOF AND REFRIGERATING/HEATING SYSTEM", which is incorporated herein by reference in its entirety Claim profit

The present application relates to a method of controlling a compressor assembly, a compressor assembly and a cooling/heating system.

The contents of these items merely provide background information related to the present application, which may not constitute prior art.

Compressors, such as scroll compressors, generally comprise a compression mechanism comprising, for example, a fixed scroll member and an orbital scroll member. The compression mechanism receives the working fluid from the suction pressure zone of the compressor, compresses the working fluid within one or more compression chambers defined by the compression mechanism, and then discharges the compressed working fluid to the discharge pressure zone of the compressor. Generally, the compression mechanism achieves lubrication by means of a lubricant. Of course, lubricants for lubricating the compression mechanism can also be used for lubrication of other components of the compressor, for example for lubrication of the main bearing housing or motor.

Lubricants for lubricating the various members of the compressor generally flow through the compression mechanism together with the working fluid and are discharged into the discharge pressure zone of the compressor. During this compression, the temperature of the lubricant rises with the temperature of the working fluid. The lubricant is then separated from the working fluid and recovered for reuse in lubrication of the compressor. However, such a repeatedly heated lubricant can overheat the indrawn working fluid, thereby reducing compressor volumetric efficiency and consequently reducing compressor performance. In addition, overheated lubricant may cause excessive wear when lubricating various members of the compressor, such as a motor, and thus reduce compressor reliability. For example, in the case of an overheated lubricant, it is difficult to maintain the viscosity of the lubricant at a desired level capable of maintaining the desired oil film thickness between the moving members.

However, there is currently no technical means for effectively solving the technical problem that the performance of the compressor is reduced due to overheated lubricant.

It is an object of one or more embodiments herein to provide a control method for a compressor assembly, such control method being able to monitor the temperature of a lubricant to lubricate the compressor and to control the operation of the compressor assembly based on the sensed temperature of the lubricant. Can, for example, when the temperature of the lubricant is too high, actively controlling (e.g., reducing) the temperature of the lubricant, sending a warning signal and/or performing a shutdown, and accordingly Improves performance (eg, stability and reliability and others).

Another object of one or more embodiments herein is to provide a compressor assembly, such a compressor assembly being able to monitor the temperature of a lubricant to lubricate the compressor and to control the operation of the compressor assembly based on the sensed temperature of the lubricant and , For example, when the temperature of the lubricant is too high, actively controlling (e.g., reducing) the temperature of the lubricant, sending a warning signal and/or performing a shutdown, and accordingly the performance of the compressor (e.g. For example, improve stability and reliability and others).

Another object of one or more embodiments herein is to provide a cooling/heating system, which cooling/heating system can monitor the temperature of a lubricant to lubricate the compressor and based on the sensed temperature of the lubricant The operation can be controlled, e.g., when the temperature of the lubricant is too high, actively controlling (e.g., reducing) the temperature of the lubricant, sending a warning signal and/or making the operation stop, and Accordingly, it improves the performance of the compressor (eg, stability and reliability and others).

A method of controlling a compressor assembly is provided according to an aspect of the present disclosure, the compressor assembly comprising a compressor configured to compress a working fluid from a suction pressure to a discharge pressure, the discharge pressure being higher than the suction pressure, and the control method comprises:

Expanding the condensed working fluid after being compressed by the compressor;

Transferring heat from the lubricant to lubricate the compressor to the expanded working fluid to cool the lubricant and heat the expanded working fluid;

Sensing the temperature of the cooled lubricant; And

Controlling the operation of the compressor assembly based on the sensed temperature of the lubricant.

Preferably, the control method further comprises: determining a lubricant temperature target, the operation comprising: determining whether a temperature of the lubricant is higher than a target lubricant temperature value; Implementing lubricant temperature control logic when the temperature of the lubricant is higher than the lubricant temperature target value; And executing the first control logic when the temperature of the lubricant is below the target lubricant temperature value.

Preferably, the control method comprises: sensing the discharge temperature of the working fluid compressed by the compressor; Further comprising determining an emission temperature target, the operations comprising: determining whether the emission temperature is higher than the emission temperature target value; Implementing emission temperature control logic when the emission temperature is higher than the emission temperature target value; And performing a lubricant temperature target determination operation or a first control logic when the discharge temperature is less than or equal to the discharge temperature target value.

Preferably, the control method further comprises: determining whether a lubricant temperature protection is determined, the action comprising: determining whether a temperature of the lubricant is higher than a lubricant temperature protection value; Implementing lubricant temperature protection logic when the temperature of the lubricant is higher than the lubricant temperature protection value; And executing a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the temperature of the lubricant is less than or equal to the lubricant temperature protection value, wherein the lubricant temperature protection value is higher than the lubricant temperature target value.

Preferably, the control method further comprises: determining an emission temperature protection, the operation comprising: determining whether the emission temperature is higher than the emission temperature protection value; Implementing emission temperature protection logic when the emission temperature is higher than the emission temperature protection value; And performing a lubricant temperature protection determination operation, a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the discharge temperature is less than the discharge temperature protection value, wherein the discharge temperature protection value is less than the discharge temperature target value. high.

Preferably, each of the discharge temperature protection logic and the lubricant temperature protection logic comprises a warning operation and/or a shut-off operation,

The discharge temperature control logic includes increasing the flow rate of the expanded working fluid to reduce the discharge temperature,

The lubricant temperature control logic includes increasing the flow rate of the expanded working fluid to decrease the temperature of the lubricant,

The first control logic includes adjusting the flow rate of the expanded working fluid to improve the performance of the compressor assembly.

Preferably, the control method further comprises transferring heat from the condensed working fluid to the expanded working fluid.

Preferably, the control method further comprises supplying the heated working fluid to a region, having an intermediate pressure, of the compressor, the intermediate pressure being higher than the suction pressure and lower than the discharge pressure.

A compressor assembly is further provided in accordance with another aspect of the present disclosure, such a compressor assembly:

A compressor configured to compress a working fluid from a suction pressure to a discharge pressure, the discharge pressure being higher than the suction pressure;

An expansion device configured to expand the working fluid condensed by the condenser;

A heat exchanger configured to transfer heat from the lubricant for lubricating the compressor to the working fluid expanded by the expansion device to cool the lubricant and heat the working fluid expanded by the expansion device;

A first sensing device configured to sense the temperature of the lubricant cooled by the heat exchanger; And

And a controller configured to control operation of the compressor assembly based on the temperature of the lubricant sensed by the first sensing device.

Preferably, the controller is configured to: perform a lubricant temperature target determination operation, the lubricant temperature target determination operation: determining whether a temperature of the lubricant is higher than a lubricant temperature target value; Implementing lubricant temperature control logic when the temperature of the lubricant is higher than the lubricant temperature target value; And executing the first control logic when the temperature of the lubricant is below the target lubricant temperature value.

Preferably, the compressor assembly further comprises a second sensing device configured to sense a discharge temperature of the working fluid compressed by the compressor, the controller is further configured to perform a discharge temperature target determination operation, the discharge temperature target determination operation: Determining whether the emission temperature is higher than the emission temperature target value; Implementing emission temperature control logic when the emission temperature is higher than the emission temperature target value; And performing a lubricant temperature target determination operation or a first control logic when the discharge temperature is less than or equal to the discharge temperature target value.

Preferably, the controller is further configured to perform a lubricant temperature protection determining operation, the lubricant temperature protection determining operation: determining whether a temperature of the lubricant is higher than a lubricant temperature protection value; Implementing lubricant temperature protection logic when the temperature of the lubricant is higher than the lubricant temperature protection value; And executing a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the temperature of the lubricant is less than or equal to the lubricant temperature protection value, wherein the lubricant temperature protection value is higher than the lubricant temperature target value.

Preferably, the controller is further configured to perform an emission temperature protection determination operation, wherein the emission temperature protection determination operation includes: determining whether the emission temperature is higher than the emission temperature protection value; Implementing emission temperature protection logic when the emission temperature is higher than the emission temperature protection value; And performing a lubricant temperature protection determination operation, a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the discharge temperature is less than the discharge temperature protection value, wherein the discharge temperature protection value is less than the discharge temperature target value. high.

Preferably, each of the discharge temperature protection logic and the lubricant temperature protection logic comprises a warning operation and/or a shut-off operation,

The discharge temperature control logic includes increasing the flow rate of the working fluid expanded by the expansion device to reduce the discharge temperature,

The lubricant temperature control logic includes increasing the flow rate of the working fluid expanded by the expansion device to decrease the temperature of the lubricant,

The first control logic includes adjusting the flow rate of the working fluid expanded by the expansion device to improve the performance of the compressor assembly.

Preferably, the heat exchanger is further configured to transfer heat from the working fluid condensed by the condenser to the working fluid expanded by the expansion device.

Preferably, the compressor assembly is further configured to supply the working fluid heated by the heat exchanger to the region, having an intermediate pressure, of the compressor, the intermediate pressure being higher than the suction pressure and lower than the discharge pressure.

Preferably, a first sensing device is provided in the line through which the heat exchanger is in fluid communication with the compressor so that the lubricant can flow from the heat exchanger to the compressor.

Preferably, the compressor comprises a scroll compressor.

According to another aspect of the present application, a cooling/heating system is further provided that includes a compressor assembly described herein.

According to another aspect of the present disclosure, a cooling/heating system is further provided, wherein the cooling/heating system:

A compressor configured to compress a working fluid from a suction pressure to a discharge pressure, the discharge pressure being higher than the suction pressure;

A condenser configured to condense the working fluid compressed by the compressor;

An expansion device configured to expand the working fluid condensed by the condenser;

A heat exchanger configured to transfer heat from the lubricant for lubricating the compressor to the working fluid expanded by the expansion device to cool the lubricant and heat the working fluid expanded by the expansion device;

A first sensing device configured to sense the temperature of the lubricant cooled by the heat exchanger; And

And a controller configured to control the operation of the cooling/heating system based on the temperature of the lubricant sensed by the first sensing device.

Preferably, the controller is configured to: perform a lubricant temperature target determination operation, the lubricant temperature target determination operation: determining whether a temperature of the lubricant is higher than a lubricant temperature target value; Implementing lubricant temperature control logic when the temperature of the lubricant is higher than the lubricant temperature target value; And executing the first control logic when the temperature of the lubricant is below the target lubricant temperature value.

Preferably, the cooling/heating system further comprises a second sensing device configured to detect the discharge temperature of the working fluid compressed by the compressor, the controller is further configured to perform the discharge temperature target determination operation, and the discharge temperature target determination operation Silver: to determine whether the emission temperature is higher than the emission temperature target value; Implementing emission temperature control logic when the emission temperature is higher than the emission temperature target value; And performing a lubricant temperature target determination operation or a first control logic when the discharge temperature is less than or equal to the discharge temperature target value.

Preferably, the controller is further configured to perform a lubricant temperature protection determining operation, the controller comprising: determining whether a temperature of the lubricant is higher than a lubricant temperature protection value; Implementing lubricant temperature protection logic when the temperature of the lubricant is higher than the lubricant temperature protection value; And executing a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the temperature of the lubricant is less than or equal to the lubricant temperature protection value, wherein the lubricant temperature protection value is higher than the lubricant temperature target value.

Preferably, the controller is further configured to perform an emission temperature protection determination operation, wherein the emission temperature protection determination operation includes: determining whether the emission temperature is higher than the emission temperature protection value; Implementing emission temperature protection logic when the emission temperature is higher than the emission temperature protection value; And performing a lubricant temperature protection determination operation, a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the discharge temperature is less than the discharge temperature protection value, wherein the discharge temperature protection value is less than the discharge temperature target value. high.

Preferably, each of the discharge temperature protection logic and the lubricant temperature protection logic comprises a warning operation and/or a shut-off operation,

The discharge temperature control logic includes increasing the flow rate of the working fluid expanded by the expansion device to reduce the discharge temperature,

The lubricant temperature control logic includes increasing the flow rate of the working fluid expanded by the expansion device to decrease the temperature of the lubricant,

The first control logic includes adjusting the flow rate of the working fluid expanded by the expansion device to improve the performance of the cooling/heating system.

Preferably, the heat exchanger is further configured to transfer heat from the working fluid condensed by the condenser to the working fluid expanded by the expansion device.

Preferably, the cooling/heating system is further configured to supply the working fluid heated by the heat exchanger to the region, having an intermediate pressure, of the compressor, the intermediate pressure being higher than the suction pressure and lower than the discharge pressure.

Preferably, a first sensing device is provided in the line through which the heat exchanger is in fluid communication with the compressor so that the lubricant can flow from the heat exchanger to the compressor.

Preferably, the compressor comprises a scroll compressor.

The following is at least one advantage of the method of controlling the compressor assembly, the compressor assembly and the cooling/heating system according to one or more embodiments of the present application: by sending a warning signal and/or performing a shut-off operation when the temperature of the lubricant is too high. In order to prevent losses due to excessive wear of the compressor, the temperature of the lubricant to lubricate the compressor can be monitored; By monitoring the temperature of the lubricant, it actively controls the temperature of the lubricant, thereby reducing the number of compressor downtimes and improving the stability and reliability of the compressor.

Other fields of application will become apparent from the description provided herein. It is to be understood that the specific examples and embodiments described herein are illustrative only and are not intended to limit the scope of the present application.

The drawings described herein are for illustrative purposes only and do not limit the scope of the present application in any way, the drawings are not drawn to scale, and some features may have been enlarged or reduced to show details of specific members. I can.
1A and 1B show perspective views of a partial structure of a compressor assembly according to an embodiment of the present application from different perspectives.
1C is a longitudinal cross-sectional view of a compressor according to an embodiment of the present application.
2 is a schematic diagram of a cooling/heating system according to an embodiment of the present application.
3 is an exemplary flowchart of a method for controlling a compressor assembly according to an embodiment of the present disclosure.
It should be understood that in all these figures, corresponding reference numbers indicate similar or corresponding parts and features. For the sake of clarity, not all members in the drawings are labeled.

The description of the preferred embodiments below is merely illustrative in nature and is not intended to limit the scope of the present application.

First, with reference to FIGS. 1A to 1C, the overall configuration and operating principle of the compressor assembly 1 and the cooling/heating system 2 will be described. 1A and 1B, the compressor assembly 1 mainly includes a compressor 10, a heat exchanger 40 and a controller 60. A lubricant (eg, lubricating oil) for lubricating the compressor 10 flows through the heat exchanger 40 so that it is cooled by the heat exchanger 40. The controller 60 can monitor the temperature of the lubricant flowing out of the heat exchanger 40 and/or into the compressor 10 (in the specification and drawings, when the lubricant is a lubricating oil, the temperature of the lubricating oil is simply the oil temperature. May be referred to as). Preferably, the controller 60 can adjust the heat exchange capacity of the heat exchanger 40 by the monitored temperature of the lubricant, thereby preventing the temperature of the lubricant from becoming too high to degrade the performance of the compressor 10. For this purpose, the temperature of the aforementioned lubricant can be actively controlled (for example, the temperature of the lubricant can be controlled within a specific range). It should be noted that the performance of the compressors described herein optionally includes: stability, safety, reliability, cooling/heating capacity, efficiency, energy consumption, and the like.

Next, the specific configuration of the compressor 10 will be mainly described with reference to Fig. 1C.

The compressor 10 generally includes a housing 101, a high-pressure side end cover 103 provided at one end of the housing 101 (right end as shown in Fig. 1C), and the other end of the housing 101 (Fig. 1C). The low pressure side end cover 102 provided on the left end as shown in FIG. 2, and the high pressure side end cover 103 and the housing to divide the inner space of the compressor 10 into a high pressure side region 109 and a low pressure side region. It includes a partition portion 104 provided between 101. The space between the partition part 104 and the high-pressure side end cover 103 constitutes a high-pressure side region 109, and the space between the partition part 104, the housing 101, and the low-pressure side end cover 102 is A low-pressure side region (no label is given) is configured. A blowing joint 110 for sucking working fluid is provided in the low pressure side region, and a discharge joint 111 for discharging the compressed working fluid is provided in the high pressure side region 109. Further, a motor 107 made of a stator and a rotor (not labeled) is provided in the housing 101. A rotating shaft 106 is provided in the rotor of the motor 107 to drive a compression mechanism 108 made of, for example, a fixed scroll member and an orbital scroll member (not labeled). A series of compression chambers having a volume gradually decreasing from the radially outer side to the radially inner side are formed between the fixed scroll member and the orbital scroll member, the radially outermost compression chamber being at suction pressure and the radially innermost The compression chamber is at discharge pressure. The intermediate compression chamber is at an intermediate pressure between the suction pressure and the discharge pressure, and is also referred to as an intermediate pressure chamber.

One end (right end as shown in Fig. 1C) of the rotating shaft 106 is supported by a main bearing provided in the main bearing housing 105. One end (right end) of the rotating shaft 106 is provided with an eccentric crank pin capable of driving the orbiting scroll member so that the orbiting scroll member orbits with respect to the fixed scroll member in order to compress the working fluid. do. The working fluid compressed by the fixed scroll member and the orbital scroll member is discharged to the high pressure side region 109 and then exits the compressor 10 through the discharge joint 111.

The lubrication process of the various members in the compressor 10 will be described below.

In the example of the compressor 10 as shown in Fig. 1C, the lubricant from the outside of the compressor 10 is first passed through a line (not shown) in the housing 101 to one end of the rotating shaft 106 (Fig. 1C). Is supplied to the left end as shown). A passage is formed in the rotating shaft 106 and comprising a central hole formed on the left side of the rotating shaft 106 and an eccentric hole extending from the central hole to the end surface of the eccentric crank pin, and substantially the axis of the rotating shaft 106 Extends in the direction The lubricant is first supplied to the center hole. During operation of the compressor 10, the lubricant entering the central hole is thrown and/or pumped into the eccentric hole under the influence of the rotation of the rotating shaft 106 and/or the pressure difference, and is eccentric to the right along the eccentric hole. Flows to the end surface of the crank pin. Part of the lubricant discharged from the end surface of the eccentric crank pin flows to the main bearing housing 105 to lubricate the main bearing, and a part of the lubricant flows to the end plate of the orbital scroll member, and the orbital movement scroll member moves in orbit. When done, it is distributed over the thrust surface of the thrust plate. During operation of the compressor 10, the lubricant supplied to each moving portion in the compressor 10 is thrown and splashed to form droplets or mist. These lubricant droplets or fumes are mixed in the working fluid (eg, coolant) drawn from the blown joint 110. This lubricant-mixed working fluid is then drawn into the compression chamber of the compression mechanism 108, thereby lubricating, sealing and cooling the interior of the compression mechanism 108. The working fluid and lubricant compressed by the compression mechanism 108 are discharged into the high pressure side region 109. The lubricant is separated from the working fluid, for example by a lubricant separator, and is temporarily stored at the lower end of the high pressure side region 109. Then, the lubricant at the lower end of the high-pressure side region 109 is discharged to the outside of the compressor 10, and then enters the heat exchanger 40 described above for cooling, and after cooling by the heat exchanger 40, the lubricant is again It is fed back into the compressor 10, for example into the left end of the rotating shaft 106, thereby continuing to lubricate the compressor 10 as described above.

1A-1C and 2, these figures illustrate the cooling process of the lubricant during operation of the compressor assembly 1 and the cooling/heating system 2.

As described above, the compressor assembly 1 includes a compressor 10 that compresses a working fluid (eg, coolant) flowing through it from a suction pressure to a discharge pressure greater than the suction pressure. The blowing joint 110 is in fluid communication with the low pressure side region of the compressor 10 to supply the working fluid to the low pressure side region. The discharge joint 111 is in fluid communication with the high pressure side region 109 of the compressor 10 to receive the compressed working fluid from the high pressure side region 109 of the compressor 10. The compressor 10 further has an intermediate pressure port 112 in fluid communication with the intermediate compression chamber of the compression mechanism 108 of the compressor 10 at a position corresponding to the intermediate pressure between the discharge pressure and the suction pressure. Thus, the intermediate pressure port 112 can supply a working fluid to the compression chamber of the compressor 10 at, for example, an intermediate pressure. 1A and 1B, the compressor assembly 1 may further include an expansion device 30, a heat exchanger 40 and a controller 60. In particular, the compressor assembly 1 may further include a first sensing device 50 (see FIG. 2) for sensing the temperature of the lubricant, and the controller 60 is detected by the first sensing device 50. It is configured to control the operation of the compressor assembly 1 based on the temperature of the lubricant, and these members will be described below.

In the cooling/heating system 2, the working fluid flowing out of the discharge joint 111 flows into the condenser 20, and in the condenser 20 the working fluid releases some of the heat. This portion of the heat can be released into other fluids flowing through the condenser 20. As a non-limiting example, this portion of the heat may be introduced by the fan and transferred to the air stream flowing through the condenser 20. The working fluid flowing through the condenser 20 may condense (at least partially) from a high temperature, high pressure gaseous working fluid to a reduced temperature high pressure condensing liquid working fluid.

The condensed working fluid then flows from the condenser 20 into the heat exchanger 40.

Preferably, a storage container 86 and/or a drying filter 85 may be provided between the condenser 20 and the heat exchanger 40, and the storage container 86 compensates for some loss of working fluid during the cycle. In order to be configured to store a portion of the condensed working fluid, the drying filter 85 is configured to remove unwanted impurities such as moisture in the working fluid.

The condensed working fluid can enter the heat exchanger 40 (e.g., at the top of the heat exchanger 40 in FIG. 1B) through the port 41 via the line 401, and the port 41 Is in fluid communication with port 42 through line 412 in heat exchanger 40. The working fluid exits the heat exchanger 40 (eg, the lower end of the heat exchanger 40 in FIG. 1B) through the port 42 via line 402. The working fluid releases some of the heat within the heat exchanger 40. Accordingly, the condensed working fluid is secondarily cooled and exits the heat exchanger 40 at a lower temperature than when entering the heat exchanger 40.

The secondary cooled working fluid in line 402 flows through a primary throttling device 82 (eg, a thermostatic expansion valve). The working fluid flowing through the primary throttling device 82 expands, thereby lowering the pressure and lowering the temperature. Preferably, the primary throttling device 82 is dynamically controlled to accommodate variable loads on the cooling/heating system 2. Alternatively, the primary throttling device 82 may be static (non-adjustable).

Preferably, a viewing glass 84 may be provided between the heat exchanger 40 and the primary throttling device 82 to observe the gas-liquid phase of the working fluid in line 402.

Preferably, a solenoid valve 83 is provided between the heat exchanger 40 and the primary throttling device 82 in order to open or close the circulation of the working fluid in the cooling/heating system 2. Of course, the solenoid valve 83 could be replaced by other types of valves or switches, and could be placed in other locations in the cooling/heating system 2.

Downstream of the primary throttling device 82, the expanded working fluid enters the evaporator 81. In the evaporator 81, the working fluid absorbs heat and is converted from a low temperature low pressure (liquid) working fluid to an elevated temperature low pressure (gas) working fluid. As a non-limiting example, heat absorbed by the working fluid may be introduced through a fan and drawn from the air stream flowing through the evaporator 81.

Subsequently, the working fluid exiting the evaporator 81 is returned to the low pressure side region of the compressor 10 through the blowing joint 110, thereby forming a closed circulation system.

The lubricant from the compressor 10 can also flow through the heat exchanger 40, as described above with respect to the compressor 10. In particular, due to the pressure difference between the high pressure side region 109 and the low pressure side region, the lubricant can flow out of the compressor 10 from the high pressure side region 109 through the port 47, and the line 405 In fluid communication with line 456 in heat exchanger 40 through this port 45. Line 406 is in fluid communication with line 456 through port 46 and with compressor 10 through port 48, so that the lubricant exiting compressor 10 is heat exchanger 40 It flows through and returns to the region on the low pressure side of the compressor 10, which, for example, returns to the left end of the rotary shaft 106 as shown in FIG. 1C. In the heat exchanger 40, the lubricant flowing through it dissipates heat. Accordingly, the temperature of the lubricant exiting the heat exchanger 40 is lower than the temperature of the lubricant entering the heat exchanger 40.

A cooling medium such as cold water can be supplied into the heat exchanger 40 to cool the lubricant in line 456 and/or the working fluid in line 412. Thus, on the one hand, the working fluid that is secondarily cooled by the heat exchanger 40 before the working fluid flows through the primary throttling device 82 is the ability of the working fluid to absorb heat within the evaporator 81. Can be increased, thereby improving the cooling capacity of the cooling/heating system 2; On the other hand, this can lower the temperature of the lubricant that lubricates the compressor and can improve the performance of the compressor.

Advantageously, the compressor assembly 1 utilizes an expanded, condensed working fluid to absorb the heat released by the lubricant and the working fluid flowing through the heat exchanger 40 within the heat exchanger 40.

In order to more conveniently provide the aforementioned secondary cooling, a portion of the working fluid flowing through the line 402 located downstream of the heat exchanger 40 will be expanded within the expansion device 30 through the line 408. It can (and thus reduce the temperature and pressure of the working fluid) and can be introduced into the heat exchanger 40 via line 403. In particular, the working fluid can reach the lower portion of the heat exchanger 40 through the port 43. The expanded working fluid in line 403 may be in the state of a liquid, a gas or a two phase of gas-liquid. 1B and 2, the working fluid may flow upward through line 434 within heat exchanger 40 and may enter into line 404 in fluid communication with intermediate pressure port 112. I can. In particular, the working fluid can exit the upper portion of the heat exchanger 40 through a port 44 in fluid communication with line 404.

In heat exchanger 40, the working fluid flowing through line 434 absorbs heat from the working fluid flowing through line 412, thereby reducing the temperature of the condensed working fluid in line 412. (I.e. it is secondarily cooled). The working fluid exiting the heat exchanger 40 via line 404 enters the intermediate pressure position (medium pressure chamber) of the compression mechanism 108 through the intermediate pressure port 112.

In order to cool the lubricant flowing through the compressor 10, the compressor assembly 1 advantageously utilizes an expanded working fluid. In particular, within the heat exchanger 40, heat is transferred from the lubricant in line 456 to the working fluid in line 434, and thus of the lubricant flowing out of the heat exchanger 40 through line 406. The temperature is reduced. In particular, as will be described in detail below, increasing the supply of working fluid in line 403 can reduce the temperature of the lubricant to a greater extent. Accordingly, the heat exchanger 40 functions as a double heat exchanger.

Advantageously, the expansion device 30 may be a dynamic device when necessary to provide the desired cooling effect of the lubricant. Preferably, the expansion device 30 is capable of maintaining the pressure in the line 404 above the pressure of the intermediate pressure chamber in communication with the intermediate pressure port 112. The working fluid injected into the intermediate pressure chamber may be in the state of a gas, a liquid or a two phase of gas-liquid. Injecting the working fluid into the intermediate pressure chamber can also advantageously cool the compression mechanism 108 and lower the discharge temperature of the working fluid. In particular, as will be described in detail below, increasing the supply of working fluid in line 404 can reduce the discharge temperature to a greater extent.

Using the heat exchanger 40 to cool the working fluid and lubricant can provide a relatively simple cooling process and/or a smaller compressor assembly, in which only one heat exchanger is used for secondary cooling of the working fluid and of the lubricant. This is because it can provide cooling. Of course, in other embodiments herein, different heat exchangers can be used to achieve secondary cooling of the working fluid and cooling of the lubricant, respectively.

The compressor assembly 1 according to an embodiment of the present application is able to reduce the temperature of the lubricant that lubricates the compressor (with an advantageously expanded working fluid). Preferably, the cooling of the lubricant can be adjusted by using a circuit that secondarily cools the condensed working fluid. Thus, no external cooling medium or cooling source is required to cool the lubricant. In some embodiments, the expanded working fluid may be used to cool the lubricant, without the line 412 for secondary cooling of the condensed working fluid, i.e., the lubricant is cooled only by the expanded working fluid. do. In this embodiment, the heat-absorbed expanded working fluid is preferably injected into the intermediate pressure position (central pressure chamber) of the compressor 10. Reducing the lubricant temperature prevents or reduces the overheating of the suction gas (inhaled working fluid), thereby increasing the compressor volumetric efficiency and improving performance. Further, the reduced temperature of the lubricant can improve the reliability of the compressor, due to the cooling of the intake gas and the motor, and can maintain the desired viscosity level to achieve a suitable oil film thickness between the moving parts of the compressor.

Preferably, a line can be machined into the housing 101 so that the lubricant can flow directly from the port 48 to one end of the rotary shaft 106 and/or to the low pressure side region.

The supply amount of the working fluid flowing through the line 404 or line 434 can adjust not only the discharge temperature of the compressor 10, but also the temperature of the lubricant (the temperature of the lubricant injected into the compressor).

However, although the compressor assembly 1 is provided with a heat exchanger 40 for cooling the lubricant, there are still cases where, for some reasons, such as failure, the lubricant overheats and the performance of the compressor 1 degrades accordingly.

To this end, the compressor assembly 1 can actively sense the temperature of the lubricant cooled by the heat exchanger 40 to avoid the above-described case.

As can be seen from the foregoing, the cooling/heating system 2 comprises a compressor 10, an expansion device 30, a heat exchanger 40, a first sensing device 50 and a controller 60 (Fig. 1A and 1B, these members constitute the compressor assembly 1 described above), as well as other members described above, such as the condenser 20, the evaporator 81, and the primary throttling device 82. It can also include.

The control method for the compressor assembly 1 according to the embodiment of the present application can be understood with reference to FIG. 3.

Specifically, a first sensing device 50 for sensing the temperature of the lubricant may be provided in the compressor assembly 1. In particular, the first detection device 50, in order to intuitively detect the temperature of the lubricant exiting from the heat exchanger 40 and/or entering the compressor 10, between the heat exchanger 40 and the compressor 10 Is provided in. Of course, in other embodiments, the first sensing device 50 could alternatively be arranged in other suitable locations.

As shown in FIG. 2, the first sensing device 50 may provide a signal indicating the temperature of the lubricant through the line 650 to the controller 60, and the controller 60 may provide a sensed temperature of the lubricant. Compared to the desired lubricant temperature target value, and when the temperature of the lubricant is higher than the lubricant temperature target value, it is considered that the lubricant may overheat. At this time, the controller 60 implements the lubricant temperature control logic. For example, the lubricant temperature control logic may include increasing the flow rate of the working fluid expanded by the expansion device 30 to reduce the temperature of the lubricant flowing through the heat exchanger 40. Specifically, the controller 60 is coupled to the motor 32 via a line 632, so that the motor 32 can be operated to change the operating state of the expansion device 30. Changing the operating state of the expansion device 30 includes, for example, increasing or decreasing the opening of the expansion device 30 to increase or decrease the flow rate of the working fluid flowing through the expansion device 30.

On the other hand, when the controller 60 confirms that the temperature of the lubricant is below the lubricant temperature target value, it is considered that the lubricant may not suffer from overheating. At this time, the controller 60 may, for example, perform the following first control logic or may not perform any logic. In this embodiment, the first control logic includes improved steam injection control, that is, monitoring the temperature of the expanded working fluid entering heat exchanger 40 (by line 601 and sensor 61). To monitor the temperature of the expanded working fluid exiting heat exchanger 40 (by line 602 and sensor 62) and/or (line 603 and second sensor device 63) By monitoring the discharge temperature of the working fluid of the compressor 10, the opening of the expansion device 30 is controlled, and thus the performance of the compressor assembly 1 or of the cooling/heating system 2 (e.g. For example, improve capacity, efficiency, energy consumption).

The foregoing operation may be referred to herein as a lubricant temperature target determination operation.

Preferably, the controller 60 can also adjust the opening of the expansion device 30 in response to an overheating phenomenon of the discharge temperature.

Specifically, the controller 60 can determine whether or not the emission temperature obtained by the second detection device 63 exceeds the emission temperature target value, and when the emission temperature exceeds the emission temperature target value, the emission It is considered that there may be a temperature overheating phenomenon, and the emission temperature control logic is implemented accordingly. For example, the discharge temperature control logic includes increasing the flow rate of the working fluid expanded by the expansion device 30 to reduce the discharge temperature (as described above). The second sensing device 63 for sensing the discharge temperature may be provided in the compressor 10 as shown in FIG. 1C, or provided between the compressor 10 and the condenser 20 as shown in FIG. Can be.

On the other hand, when the discharge temperature is less than the discharge temperature target value, the controller 60 executes the aforementioned lubricant temperature target determination operation or the aforementioned first control logic.

The above-described operation may be referred to herein as an emission temperature target determination operation.

Although embodiments herein provide an operation to limit the lubricant temperature and/or discharge temperature below a certain target value, there is still a phenomenon in which the lubricant temperature and/or discharge temperature is increased due to some reasons such as failure. To this end, in order to provide a warning signal to the user when the lubricant temperature and/or discharge temperature reaches the protection value and even to shut down the compressor assembly 1 or compressor 10, accordingly due to compressor failure ( In order to prevent losses, for example due to excessive wear), it is also necessary to set an additional higher protection value for the lubricant temperature and/or discharge temperature. Preferably, after the interruption operation, the compressor assembly 1 or the compressor 10 may be automatically restarted after a predetermined period of time, or the above-described restart operation may be carried out until further instruction from the user is received.

Specifically, the controller 60 can additionally determine whether the temperature of the lubricant is higher than the lubricant temperature protection value, the lubricant temperature protection value is higher than the lubricant temperature target value, when the temperature of the lubricant is higher than the lubricant temperature protection value, Controller 60 may implement lubricant temperature protection logic. For example, the lubricant temperature protection logic may include a warning action and/or a stop action. More specifically, when the temperature of the lubricant is higher than the first lubricant temperature protection value, the controller 60 can send a warning signal to the user, and the temperature of the lubricant continues to rise higher than the higher second lubricant temperature protection value. When so, the controller 60 may choose to shut down the compressor assembly 1 or the compressor 10 for protection.

On the other hand, when the lubricant temperature is below the lubricant temperature protection value, the controller 60 may perform an emission temperature target determination operation, a lubricant temperature target determination operation, or a first control logic.

The foregoing operation may be referred to herein as a lubricant temperature protection determination operation.

Similar to the lubricant temperature protection determination operation, in a preferred embodiment of the present application, the controller 60 can further determine whether the discharge temperature is higher than the discharge temperature protection value, and the discharge temperature protection value is higher than the discharge temperature target value. , The controller 60 may implement the emission temperature protection logic when the emission temperature is higher than the emission temperature protection value. For example, the emission temperature protection logic may include a warning operation and/or a stop operation. More specifically, when the emission temperature is higher than the first emission temperature protection value, the controller 60 may send a warning signal to the user, and when the emission temperature continues to rise higher than the second emission temperature protection value, which is higher The controller 60 may choose to shut down the compressor assembly 1 or the compressor 10 for protection.

On the other hand, when the discharge temperature is less than or equal to the discharge temperature protection value, the controller 60 may perform a lubricant temperature protection determination operation, a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic.

The operation described above may be referred to herein as an emission temperature protection determination operation.

Although in the embodiment shown in FIG. 3 of the present application, the discharge temperature protection determination operation, the lubricant temperature protection determination operation, the discharge temperature target determination operation, the lubricant temperature target determination operation, and the first control logic are executed in this order, In other embodiments, the above-described decision operations or control logic may be performed in any combination of order.

In addition, the control method of the compressor assembly according to the embodiment of the present application may include only at least one of a discharge temperature protection determination operation, a lubricant temperature protection determination operation, a discharge temperature target determination operation, a lubricant temperature target determination operation, and the first control logic. There is no need to include all of these decision actions or control logic.

In a preferred embodiment of the present application, one or more of the above-described decision operations or control logic may be repeated (regularly or irregularly) a number of times.

It should be noted that the first control logic described herein may include any suitable control logic other than the enhanced steam injection control logic.

It should be noted that in a preferred embodiment of the present application, the flow direction of the expanded working fluid in the heat exchanger may be opposite to the flow direction of the condensed working fluid and/or lubricant in the heat exchanger. However, in other embodiments, the flow directions may be the same with respect to structural design considerations.

A cooling/heating system comprising a compressor assembly described herein as well as a cooling/heating system comprising a compressor, a heat exchanger, a first sensing device, and a controller as described herein. It should be noted that such compressors, heat exchangers, first sensing devices and controllers are not in assembly form but exist relatively independently in the cooling/heating system.

While in some embodiments herein, the plate heat exchanger is described as an example of heat exchanger 40, it will be appreciated that in other embodiments, the heat exchanger 40 described herein may also include other types of heat exchangers. I will be able to.

In some embodiments herein, the horizontal scroll compressor is described as an example of the compressor 10, but in other embodiments, the compressor 10 described herein is also a type of compressor other than the horizontal scroll compressor, such as a reciprocating compressor. It will be appreciated that compressors, rotor compressors, and vertical compressors may be included.

In some embodiments herein, lubricating oil is described as an example of a lubricant, but in other embodiments, the lubricant described herein may also include other types of lubricants other than lubricating oil, such as lubricating grease. Thus, the term “oil temperature” as used in the examples herein may be limited to the temperature of the lubricating oil as well as the temperature of the lubricant in a broader sense.

It should be noted that reference herein to terms such as front, rear, left, right, top and bottom is for illustrative purposes only and is not intended to limit the orientation and orientation of the embodiments herein in practical application.

Although several embodiments of the present application have been specifically described herein, the present application is not limited to the specific embodiments specifically described and illustrated herein, and other changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present application. You can understand that there is. All such changes and modifications are intended to be included within the scope of this application.

1 compressor assembly
2 cooling/heating system
10 compressor
101 housing
102 Low pressure side end cover
103 High pressure side end cover
104 division
105 main bearing housing
106 rotating shaft
107 motor
108 compression mechanism
109 High side area
110 blown joint
111 release joint
112 medium pressure port
20 condenser
30 inflation device
32 motor
40 heat exchanger
41 to 48 ports
401 to 406, 408, 412, 434, 456 lines
50 first sensing device
60 controller
61, 62 sensor
63 Second sensing device
601, 602, 603, 632, 650 lines
81 evaporator
82 Primary throttling device
83 solenoid valve
84 observation glass
85 dry filter
86 storage container

Claims (29)

Compressor assembly 1 control method, compressor assembly 1 comprising a compressor 10 configured to compress a working fluid from suction pressure to discharge pressure, discharge pressure is higher than suction pressure, the control method:
Allowing the condensed working fluid to flow through the first line 412 in the heat exchanger 40;
After allowing a part of the working fluid from the first line 412 of the heat exchanger 40 to expand, it flows through the second line 434 in the heat exchanger 40 to have an intermediate pressure in the region of the compressor 10 Allowing to enter, wherein the intermediate pressure is greater than the suction pressure and less than the discharge pressure;
Returning another portion of the working fluid from the first line 412 of the heat exchanger 40 to the low pressure side region of the compressor 10 through the blowing joint 110;
A step of allowing a lubricant for lubricating the compressor 10 to flow through the third line 456 in the heat exchanger 40 and then flowing into the region on the low pressure side of the compressor 10, in the heat exchanger 40 Heat is transferred from the lubricant flowing through the third line 456 to the working fluid flowing through the second line 434, and heat is transferred from the working fluid flowing through the first line 412 to the second line 434. ) Delivered to the working fluid flowing through;
Sensing the temperature of the cooled lubricant; And
Controlling the operation of the compressor assembly (1) based on the sensed temperature of the lubricant. The method of claim 1,
The lubricant temperature target determination operation further comprises: determining whether a temperature of the lubricant is higher than the lubricant temperature target value; Implementing lubricant temperature control logic when the temperature of the lubricant is higher than the lubricant temperature target value; And executing the first control logic when the temperature of the lubricant is below the lubricant temperature target value. The method of claim 2,
Sensing the discharge temperature of the working fluid compressed by the compressor 10; And
The emission temperature target determination operation further comprises: determining whether the emission temperature is higher than the emission temperature target value; Implementing emission temperature control logic when the emission temperature is higher than the emission temperature target value; And performing a lubricant temperature target determination operation or a first control logic when the discharge temperature is less than or equal to the discharge temperature target value. The method of claim 3,
The lubricant temperature protection determination operation further comprises: determining whether a temperature of the lubricant is higher than a lubricant temperature protection value; Implementing lubricant temperature protection logic when the temperature of the lubricant is higher than the lubricant temperature protection value; And executing a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the temperature of the lubricant is less than or equal to the lubricant temperature protection value,
Lubricant temperature protection value is higher than the lubricant temperature target value, control method. The method of claim 4,
Further comprising an emission temperature protection determining operation, wherein the emission temperature protection determination operation comprises: determining whether the emission temperature is higher than the emission temperature protection value; Implementing emission temperature protection logic when the emission temperature is higher than the emission temperature protection value; And performing a lubricant temperature protection determination operation, a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the discharge temperature is less than or equal to the discharge temperature protection value,
The emission temperature protection value is higher than the emission temperature target value, the control method. The method of claim 5,
Each of the discharge temperature protection logic and the lubricant temperature protection logic includes a warning operation and/or a shut-off operation,
The discharge temperature control logic includes increasing the flow rate of the working fluid flowing through the second line 434 to reduce the discharge temperature,
The lubricant temperature control logic includes increasing the flow rate of the working fluid flowing through the second line 434 to reduce the temperature of the lubricant,
The first control logic comprises adjusting the flow rate of the working fluid flowing through the second line (434) to improve the performance of the compressor assembly (1). delete delete Compressor assembly 1 is:
A compressor (10) configured to compress a working fluid from a suction pressure to a discharge pressure, the discharge pressure being higher than the suction pressure;
As a heat exchanger 40 provided with a first line 412, a second line 434, and a third line 456, the working fluid condensed by the condenser 20 is passed through the first line 412. Flow, and a part of the working fluid from the first line 412 flows through the second line 434, and the lubricant for lubricating the compressor 10 flows through the third line 456, so that heat is The second line 434 is transferred from the lubricant flowing through the third line 456 to the working fluid flowing through the second line 434, and heat is transferred from the working fluid flowing through the first line 412. A heat exchanger 40 delivered to the working fluid flowing through;
An expansion device 30 configured to expand the working fluid such that the working fluid flows through the second line 434;
As an intermediate pressure port 112, the working fluid from the second line 434 flows through the intermediate pressure port 112 into the region having an intermediate pressure of the compressor 10, the intermediate pressure being greater than the suction pressure and the discharge pressure. Smaller, medium pressure port 112;
A blow joint 110, wherein another portion of the working fluid exiting the first line 412 returns to the low pressure side region of the compressor 10 via the blow joint 110;
A lubricant port 48, wherein the lubricant from the third line 456 flows through the lubricant port 48 into the low pressure side region of the compressor 10;
A first sensing device 50 configured to sense the temperature of the lubricant cooled by the heat exchanger 40; And
A compressor assembly (1) comprising a controller (60) configured to control the operation of the compressor assembly (1) based on the temperature of the lubricant sensed by the first sensing device (50). The method of claim 9,
The controller 60 is configured to perform a lubricant temperature target determination operation, wherein the lubricant temperature target determination operation includes: determining whether a temperature of the lubricant is higher than a lubricant temperature target value; Implementing lubricant temperature control logic when the temperature of the lubricant is higher than the lubricant temperature target value; And executing the first control logic when the temperature of the lubricant is below the lubricant temperature target value. The method of claim 10,
Further comprising a second sensing device 63 configured to detect the discharge temperature of the working fluid compressed by the compressor 10, the controller 60 is further configured to perform the discharge temperature target determination operation, and the discharge temperature target determination The operation includes: determining whether the emission temperature is higher than the emission temperature target value; Implementing emission temperature control logic when the emission temperature is higher than the emission temperature target value; And performing a lubricant temperature target determination operation or first control logic when the discharge temperature is below the discharge temperature target value. The method of claim 11,
The controller 60 is further configured to perform a lubricant temperature protection determination operation, wherein the lubricant temperature protection determination operation includes: determining whether a temperature of the lubricant is higher than a lubricant temperature protection value; Implementing lubricant temperature protection logic when the temperature of the lubricant is higher than the lubricant temperature protection value; And executing a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the temperature of the lubricant is less than or equal to the lubricant temperature protection value,
The lubricant temperature protection value is higher than the lubricant temperature target value, compressor assembly (1). The method of claim 12,
The controller 60 is further configured to perform an emission temperature protection determination operation, the emission temperature protection determination operation: determining whether the emission temperature is higher than the emission temperature protection value; Implementing emission temperature protection logic when the emission temperature is higher than the emission temperature protection value; And performing a lubricant temperature protection determination operation, a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the discharge temperature is less than or equal to the discharge temperature protection value,
The discharge temperature protection value is higher than the discharge temperature target value, the compressor assembly (1). The method of claim 13,
Each of the discharge temperature protection logic and the lubricant temperature protection logic includes a warning operation and/or a shut-off operation,
The discharge temperature control logic includes increasing the flow rate of the working fluid expanded by the expansion device 30 to reduce the discharge temperature,
The lubricant temperature control logic includes increasing the flow rate of the working fluid expanded by the expansion device 30 to reduce the temperature of the lubricant,
The first control logic comprises adjusting the flow rate of the expanded working fluid by the expansion device 30 to improve the performance of the compressor assembly 1. delete delete The method according to any one of claims 9 to 14,
A first sensing device 50 is provided in line 406, through which the third line 456 of the heat exchanger 40 is in fluid communication with the lubricant port 48 of the compressor 10 so that the lubricant is heated. Compressor assembly (1), allowing flow from exchanger (40) to compressor (10). The method according to any one of claims 9 to 14,
Compressor assembly (1), wherein compressor (10) comprises a scroll compressor. A cooling/heating system (2) comprising a compressor assembly (1) according to any one of claims 9 to 14. Cooling/heating system (2) is:
A compressor (10) configured to compress a working fluid from a suction pressure to a discharge pressure, the discharge pressure being higher than the suction pressure;
A condenser 20 configured to condense the working fluid compressed by the compressor 10;
As a heat exchanger 40 provided with a first line 412, a second line 434, and a third line 456, the working fluid condensed by the condenser 20 is passed through the first line 412. Flow, and a part of the working fluid from the first line 412 flows through the second line 434, and the lubricant for lubricating the compressor 10 flows through the third line 456, so that heat is The second line 434 is transferred from the lubricant flowing through the third line 456 to the working fluid flowing through the second line 434, and heat is transferred from the working fluid flowing through the first line 412. A heat exchanger 40 delivered to the working fluid flowing through;
An expansion device 30 configured to expand the working fluid such that the working fluid flows through the second line 434;
A primary throttling device 82 configured to expand another portion of the working fluid exiting the first line 412;
An evaporator 81 configured to evaporate the working fluid expanded by the primary throttling device 82;
A blow joint 110, through which the evaporated working fluid returns to the low pressure side region of the compressor 10 through the blow joint 110;
As an intermediate pressure port 112, the working fluid from the second line 434 flows through the intermediate pressure port 112 into the region having an intermediate pressure of the compressor 10, the intermediate pressure being greater than the suction pressure and the discharge pressure. Smaller, medium pressure port 112;
A lubricant port 48, wherein the lubricant from the third line 456 flows through the lubricant port 48 into the low pressure side region of the compressor 10;
A first sensing device 50 configured to sense the temperature of the lubricant cooled by the heat exchanger 40; And
A cooling/heating system (2) comprising a controller (60) configured to control the operation of the cooling/heating system (2) based on the temperature of the lubricant sensed by the first sensing device (50). The method of claim 20,
The controller 60 is configured to perform a lubricant temperature target determination operation, wherein the lubricant temperature target determination operation includes: determining whether a temperature of the lubricant is higher than a lubricant temperature target value; Implementing lubricant temperature control logic when the temperature of the lubricant is higher than the lubricant temperature target value; And executing the first control logic when the temperature of the lubricant is below the lubricant temperature target value. The method of claim 21,
Further comprising a second sensing device 63 configured to detect the discharge temperature of the working fluid compressed by the compressor 10, the controller 60 is further configured to perform the discharge temperature target determination operation, and the discharge temperature target determination The operation includes: determining whether the emission temperature is higher than the emission temperature target value; Implementing emission temperature control logic when the emission temperature is higher than the emission temperature target value; And performing a lubricant temperature target determination operation or a first control logic when the discharge temperature is below the discharge temperature target value. The method of claim 22,
The controller 60 is further configured to perform a lubricant temperature protection determination operation, wherein the lubricant temperature protection determination operation includes: determining whether a temperature of the lubricant is higher than a lubricant temperature protection value; Implementing lubricant temperature protection logic when the temperature of the lubricant is higher than the lubricant temperature protection value; And executing a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the temperature of the lubricant is less than or equal to the lubricant temperature protection value,
The lubricant temperature protection value is higher than the lubricant temperature target value, the cooling/heating system (2). The method of claim 23,
The controller 60 is further configured to perform an emission temperature protection determination operation, the emission temperature protection determination operation: determining whether the emission temperature is higher than the emission temperature protection value; Implementing emission temperature protection logic when the emission temperature is higher than the emission temperature protection value; And performing a lubricant temperature protection determination operation, a discharge temperature target determination operation, a lubricant temperature target determination operation, or a first control logic when the discharge temperature is less than or equal to the discharge temperature protection value,
The emission temperature protection value is higher than the emission temperature target value, the cooling/heating system (2). The method of claim 24,
Each of the discharge temperature protection logic and the lubricant temperature protection logic includes a warning operation and/or a shut-off operation,
The discharge temperature control logic includes increasing the flow rate of the working fluid expanded by the expansion device 30 to reduce the discharge temperature,
The lubricant temperature control logic includes increasing the flow rate of the working fluid expanded by the expansion device 30 to reduce the temperature of the lubricant,
The first control logic comprises adjusting the flow rate of the working fluid expanded by the expansion device 30 to improve the performance of the cooling/heating system 2. delete delete The method according to any one of claims 20 to 25,
A first sensing device 50 is provided in line 406, through which the third line 456 of the heat exchanger 40 is in fluid communication with the lubricant port 48 of the compressor 10 so that the lubricant is heated. A cooling/heating system (2) that allows flow from the exchanger (40) to the compressor (10). The method according to any one of claims 20 to 25,
Cooling/heating system (2), wherein the compressor (10) comprises a scroll compressor.

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