Barrel pump refrigerating system and method

Abstract

The invention discloses a barrel pump refrigerating system and method.The system comprises a condenser, an economizer, a low-pressure circulating barrel, a first refrigerating pipeline, a second refrigerating pipeline, a third refrigerating pipeline, a fourth refrigerating pipeline, a fifth refrigerating pipeline, a first bypass pipeline and a second bypass pipeline; the economizer communicates with the third refrigeration pipeline through the second refrigeration pipeline, the third refrigeration pipeline communicates with the fourth refrigeration pipeline and the second bypass pipeline, and the fourth refrigeration pipeline and the second bypass pipeline communicate with the low-pressure circulation barrel through the fifth refrigeration pipeline. The condenser further communicates with the third refrigerating pipeline through the first bypass pipeline. The system is adopted in the method. According to the barrel pump refrigerating system and method, the abnormal condition of too high or too low is avoided, the service life of the whole equipment is prolonged, the fault occurrence rate is reduced, and the overall operation efficiency of the refrigerating system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a barrel pump refrigeration system and method. Background Art

[0002] At present, barrel pump refrigeration systems usually use a method of supercooling the condensate through a condenser and then adjusting the flow through a throttling device to complete the flow regulation of the condensate.

[0003] However, under certain operating conditions, the temperature and pressure in the low-pressure circulating barrel may deviate from the ideal working range, especially when the load fluctuates greatly. Such fluctuations may cause the temperature of the low-pressure circulating barrel to be too low or the pressure to be too high, thus affecting the normal operation of the system. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a barrel pump refrigeration system and method to avoid abnormal conditions of excessive or low temperatures, extend the overall service life of the equipment, reduce the occurrence rate of failures, and improve the overall operating efficiency of the refrigeration system.

[0005] The present invention provides a barrel pump refrigeration system, comprising a condenser, an economizer, a low-pressure circulation barrel, a first refrigeration pipeline, a second refrigeration pipeline, a third refrigeration pipeline, a fourth refrigeration pipeline, a fifth refrigeration pipeline, a first bypass pipeline and a second bypass pipeline, the condenser is connected to the economizer through the first refrigeration pipeline, the economizer is connected to the third refrigeration pipeline through the second refrigeration pipeline, the third refrigeration pipeline is connected to the fourth refrigeration pipeline and the second bypass pipeline, the fourth refrigeration pipeline and the second bypass pipeline are both connected to the low-pressure circulation barrel through the fifth refrigeration pipeline, and the condenser is also connected to the third refrigeration pipeline through the first bypass pipeline.

[0006] In one embodiment, the first bypass pipeline includes a first bypass pipe, at least two first stop valves and a first solenoid valve, the first bypass pipe is connected to the condenser and the third refrigeration pipeline, the first stop valve and the first solenoid valve are assembled on the first bypass pipe, and the first solenoid valve is located between the two first stop valves.

[0007] In one embodiment, the first refrigeration circuit includes a first refrigeration pipe, at least two second stop valves and a second solenoid valve, one end of the first refrigeration pipe is connected to the condenser, and the other end of the first refrigeration pipe is connected to the economizer, two second stop valves and a second solenoid valve are both mounted on the first refrigeration pipe, and the second solenoid valve is located between the two second stop valves.

[0008] In one embodiment, the second refrigeration pipeline includes a second refrigeration pipe, a third stop valve and a one-way valve, one end of the second refrigeration pipe is connected to the economizer, and the other end of the second refrigeration pipe is connected to the third refrigeration pipeline, and the third stop valve and the one-way valve are assembled on the second refrigeration pipe.

[0009] In one embodiment, the fourth refrigeration pipeline includes a fourth refrigeration pipe, a fourth stop valve, a filter, a third solenoid valve and an expansion valve. The two ends of the fourth refrigeration pipe are respectively connected to the third refrigeration pipeline and the fifth refrigeration pipeline. The fourth stop valve, filter, third solenoid valve and expansion valve are assembled on the fourth refrigeration pipe.

[0010] In one embodiment, the barrel pump refrigeration system further includes a compressor and a cooling pipeline, the compressor is connected to the condenser and the low-pressure circulation barrel, and the compressor is connected to the condenser through the cooling pipeline.

[0011] The present invention also provides a barrel pump refrigeration method, which uses the barrel pump refrigeration system described above and also includes the following steps:

[0012] Obtaining the internal temperature and pressure of the low-pressure circulation barrel;

[0013] When the temperature and pressure inside the low-pressure circulation barrel are normal, the medium passes through the condenser, the first bypass pipeline, the third refrigeration pipeline, the second bypass pipeline, the fifth refrigeration pipeline and the low-pressure circulation barrel in sequence;

[0014] In the case of abnormal temperature and / or pressure inside the low-pressure circulation barrel, the medium passes through the condenser, the first refrigeration pipeline, the economizer, the second refrigeration pipeline, the third refrigeration pipeline, the fourth refrigeration pipeline or the second bypass pipeline, the fifth refrigeration pipeline and the low-pressure circulation barrel in sequence, or

[0015] The medium passes through the first bypass pipeline, the third refrigeration pipeline, the fourth refrigeration pipeline, the fifth refrigeration pipeline and the low-pressure circulation barrel in sequence.

[0016] The barrel pump refrigeration system and method provided by the present invention can accurately control the temperature and pressure of the low-pressure circulation barrel through the real-time switching status of the first bypass pipeline and the second bypass pipeline, avoid abnormal conditions of being too high or too low, extend the service life of the entire equipment, reduce the occurrence rate of failures, and optimize the working state of the economizer, improve the overall operating efficiency of the refrigeration system, and reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic structural diagram of the barrel pump refrigeration system provided by the present invention. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] The terms "first", "second", "third", etc. are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0023] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0024] Embodiment 1

[0025] See also Figure 1The barrel pump refrigeration system provided in this embodiment includes a condenser 1, an economizer 2, a low-pressure circulation barrel 3, a first refrigeration pipeline 4, a second refrigeration pipeline 5, a third refrigeration pipeline 11, a fourth refrigeration pipeline 7, a fifth refrigeration pipeline 8, a first bypass pipeline 6 and a second bypass pipeline 10. The condenser 1 is connected to the economizer 2 through the first refrigeration pipeline 4, the economizer 2 is connected to the third refrigeration pipeline 11 through the second refrigeration pipeline 5, the third refrigeration pipeline 11 is connected to the fourth refrigeration pipeline 7 and the second bypass pipeline 10, the fourth refrigeration pipeline 7 and the second bypass pipeline 10 are both connected to the low-pressure circulation barrel 3 through the fifth refrigeration pipeline 8, and the condenser 1 is also connected to the third refrigeration pipeline 11 through the first bypass pipeline 6.

[0026] It can be known that the refrigeration system may also include a compressor, which is connected to the condenser 1 and the low-pressure circulation barrel 3. In the initial state, the compressor compresses the high-temperature gas in the low-pressure circulation barrel 3 to the condenser 1 for condensation to form a liquid medium. The liquid medium enters the economizer 2 through the first refrigeration pipeline 4. The economizer 2 absorbs the heat of the liquid medium to achieve supercooling of the liquid medium. The supercooled liquid medium flows into the low-pressure circulation barrel 3 through the third refrigeration pipeline 11, the fourth refrigeration pipeline 7 and the fifth refrigeration pipeline 8. The liquid medium in the low-pressure circulation barrel 3 transfers the cold to the refrigeration space through the air cooler. The above situation is the working state in the initial state, that is, the state where the refrigeration system has just started.

[0027] In addition to the above-mentioned operating states, after operating in the initial state, the pressure and temperature inside the low-pressure circulation barrel 3 will be obtained. The pressure and temperature inside the low-pressure circulation barrel 3 are positively correlated. When only operating the condenser 1 can make the low-pressure circulation barrel 3 meet the preset supercooling degree, or the temperature and pressure inside the low-pressure circulation barrel 3 are lower than the preset threshold value, the operating mode is that the compressor compresses the gas in the low-pressure circulation barrel 3 to the condenser 1, and the liquid medium in the condenser 1 enters the low-pressure circulation barrel 3 through the first bypass line 6, the third refrigeration line 11, the second bypass line 10 and the fifth refrigeration line 8 in turn. In this state, the remaining pipelines are in a closed state.

[0028] When the pressure and temperature inside the low-pressure circulation barrel 3 exceed the preset thresholds, that is, the temperature exceeds the preset temperature threshold, the pressure must exceed the preset pressure threshold. There are two situations in which the preset threshold is exceeded. It can be understood that if the difference with the preset temperature threshold is less than 50 degrees, there is also a situation in which the difference with the preset temperature threshold is not less than 50 degrees. When it is less than 50 degrees, the working state can be that the compressor compresses the gas in the low-pressure circulation barrel 3 to the condenser 1, and then the liquid medium enters the economizer 2 through the first refrigeration pipeline 4. The economizer 2 can cool the liquid medium to a fixed value, and then enter the second refrigeration pipeline 5 and the third The refrigeration pipeline 11, the second bypass pipeline 10 and the fifth refrigeration pipeline 8 finally enter the low-pressure circulation barrel 3. After running for a preset time in this operating state, if the temperature and pressure in the low-pressure circulation barrel 3 have not reached the preset temperature and pressure, the operating path can be changed, that is, after flowing into the third refrigeration pipeline 11, it can flow into the fourth refrigeration pipeline 7 to adjust the temperature and pressure inside the low-pressure circulation barrel 3, and finally enter the low-pressure circulation barrel 3 through the fifth refrigeration pipeline 8. In addition to the above method, the operating path can also be the condenser 1, the first bypass pipeline 6, the third refrigeration pipeline 11, the fourth refrigeration pipeline 7, the fifth refrigeration pipeline 8 and the low-pressure circulation barrel 3.

[0029] When the difference with the preset temperature threshold is not less than 50 degrees, the operating state may be that the compressor compresses the high-temperature gas in the low-pressure circulation barrel 3 to the condenser 1, and then the liquid medium in the condenser 1 enters the economizer 2 through the first refrigeration pipeline 5. When it is reduced to a fixed temperature through the economizer 2, it then passes through the second refrigeration pipeline 5, the third refrigeration pipeline 11, the fourth refrigeration pipeline 7 and the fifth refrigeration pipeline 8 to enter the low-pressure circulation barrel 3.

[0030] Please continue reading Figure 1 In some embodiments, the first bypass pipe 6 includes a first bypass pipe 603, at least two first stop valves 601 and a first solenoid valve 602. The first bypass pipe 6 connects the condenser 1 and the third refrigeration pipe 11. The first stop valve 601 and the first solenoid valve 602 are assembled on the first bypass pipe 6, and the first solenoid valve 602 is located between the two first stop valves 601.

[0031] It is understandable that both ends of the first bypass pipe 6 can be connected to the condenser 1 and the third refrigeration pipeline 11 through three-way valves. The design of the two first stop valves 601 can facilitate the maintenance of the first solenoid valve 602.

[0032] See also Figure 1In some embodiments, the first refrigeration circuit 4 includes a first refrigeration pipe 401, at least two second stop valves 402 and a second solenoid valve 403, one end of the first refrigeration pipe 401 is connected to the condenser 1, and the other end of the first refrigeration pipe 401 is connected to the economizer 2, the two second stop valves 402 and the second solenoid valve 403 are both installed on the first refrigeration pipe 401, and the second solenoid valve 403 is located between the two second stop valves 402.

[0033] It can be known that the design of the first refrigeration pipeline 4 is also to facilitate the maintenance of the second solenoid valve 403. The economizer 2 can reduce the temperature of the liquid medium to a fixed temperature value. The number of second stop valves 402 on the first refrigeration pipeline 4 can be three, and another one can be located between one of the second stop valves 402 and the economizer 2.

[0034] See also Figure 1 In some embodiments, the second refrigeration pipeline 5 includes a second refrigeration pipe 501, a third stop valve 502 and a one-way valve 503, one end of the second refrigeration pipe 501 is connected to the economizer 2, and the other end of the second refrigeration pipe 501 is connected to the third refrigeration pipeline 11, and the third stop valve 502 and the one-way valve 503 are installed on the second refrigeration pipe 501.

[0035] It is understandable that the one-way valve 503 can prevent the liquid medium from flowing back, the third refrigeration pipeline 11 can simply have only one medium pipeline, and the second refrigeration pipeline 5, the third refrigeration pipeline 11 and the first bypass pipe 4 can be connected through a three-way valve.

[0036] See also Figure 1 In some embodiments, the fourth refrigeration pipeline 7 includes a fourth refrigeration pipe 701, a fourth stop valve 702, a filter 703, a third solenoid valve 704 and an expansion valve 705. The two ends of the fourth refrigeration pipe 701 are respectively connected to the third refrigeration pipeline 11 and the fifth refrigeration pipeline 8. The fourth stop valve 702, the filter 703, the third solenoid valve 704 and the expansion valve 705 are assembled on the fourth refrigeration pipe 701.

[0037] It can be understood that the fourth stop valve 702, the filter 703, the third solenoid valve 704 and the expansion valve 705 can be assembled on the fourth refrigeration pipe 701 in sequence, and the expansion valve 705 is convenient for adjusting the flow entering the low-pressure circulation barrel 3, thereby realizing the control and adjustment of the temperature and pressure in the low-pressure circulation barrel 3.

[0038] See also Figure 1 The fifth refrigeration pipeline 8 may include a fifth refrigeration pipe 802 and a fifth stop valve 801 . The fifth refrigeration pipe 802 is connected to the low-pressure circulation barrel 3 and the fourth refrigeration pipe 701 . The fifth stop valve 801 is assembled on the fifth refrigeration pipe 802 .

[0039] Understandably, see Figure 1 The structure of the second bypass pipeline 10 can be designed with reference to the structure of the first bypass pipeline 6. A sixth refrigeration pipeline 9 can also be set between the third refrigeration pipeline 11 and the fifth refrigeration pipeline 8. The sixth refrigeration pipeline 9 includes a sixth refrigeration pipe 902 and a manual valve 901. Both ends of the sixth refrigeration pipe 902 are connected to the third refrigeration pipe 11 and the fifth refrigeration pipe 802. The manual valve 901 is assembled on the sixth refrigeration pipe 902 to facilitate manual control in an emergency.

[0040] Please participate Figure 1 In some embodiments, the barrel pump refrigeration system further includes a compressor and a cooling pipeline. The compressor is connected to the condenser 1 and the low-pressure circulation barrel 3. The compressor is connected to the condenser 1 through the cooling pipeline.

[0041] It can be understood that the cooling pipeline can include a cooling pipe and an expansion valve. The cooling pipe connects the condenser 1 and the low-pressure circulation barrel 3. After the condenser 1 condenses the high-temperature and high-pressure gas into a liquid medium, the flow rate is reduced through the expansion valve to convert the liquid medium into a gaseous state, thereby achieving a certain degree of cooling of the gaseous medium entering the compressor. This method can be applied to the above-mentioned condition where the internal temperature and pressure of the low-pressure circulation barrel 3 are too high.

[0042] Embodiment 2

[0043] See also Figure 1 The present embodiment provides a barrel pump refrigeration method, which uses the above-mentioned barrel pump refrigeration system and further includes the following steps:

[0044] S1, obtaining the internal temperature and pressure of the low-pressure circulation barrel 3;

[0045] S201, when the temperature and pressure inside the low-pressure circulation barrel 3 are normal, the medium passes through the condenser 1, the first bypass pipeline 6, the third refrigeration pipeline 11, the second bypass pipeline 10, the fifth refrigeration pipeline 8 and the low-pressure circulation barrel 3 in sequence;

[0046] S202, when the temperature and / or pressure inside the low-pressure circulation barrel 3 is abnormal, the medium passes through the condenser 1, the first refrigeration pipeline 4, the economizer 2, the second refrigeration pipeline 5, the third refrigeration pipeline 11, the fourth refrigeration pipeline 7 or the second bypass pipeline 10, the fifth refrigeration pipeline 8 and the low-pressure circulation barrel 3 in sequence, or

[0047] The medium passes through the first bypass pipeline 6 , the third refrigeration pipeline 11 , the fourth refrigeration pipeline 7 , the fifth refrigeration pipeline 8 and the low-pressure circulation barrel 3 in sequence.

[0048] It can be understood that the refrigeration state of the refrigeration method can refer to the description in the first embodiment.

[0049] From the above description, it can be known that the barrel pump refrigeration system and method provided by the present invention can accurately control the temperature and pressure of the low-pressure circulation barrel 3 through the real-time switching status of the first bypass line 6 and the second bypass line 10, avoid abnormal conditions of being too high or too low, extend the service life of the entire equipment, reduce the occurrence rate of failures, and optimize the working state of the economizer 2, improve the overall operating efficiency of the refrigeration system, and reduce energy consumption.

[0050] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A barrel pump refrigeration system, characterized in that: It includes a condenser, an economizer, a low-pressure circulation barrel, a first refrigeration pipeline, a second refrigeration pipeline, a third refrigeration pipeline, a fourth refrigeration pipeline, a fifth refrigeration pipeline, a first bypass pipeline and a second bypass pipeline. The condenser is connected to the economizer through the first refrigeration pipeline, the economizer is connected to the third refrigeration pipeline through the second refrigeration pipeline, the third refrigeration pipeline is connected to the fourth refrigeration pipeline and the second bypass pipeline, the fourth refrigeration pipeline and the second bypass pipeline are both connected to the low-pressure circulation barrel through the fifth refrigeration pipeline, and the condenser is also connected to the third refrigeration pipeline through the first bypass pipeline.

2. The barrel pump refrigeration system according to claim 1, characterized in that: The first bypass pipeline includes a first bypass pipe, at least two first stop valves and a first solenoid valve. The first bypass pipe is connected to the condenser and the third refrigeration pipeline. The first stop valve and the first solenoid valve are assembled on the first bypass pipe, and the first solenoid valve is located between the two first stop valves.

3. The barrel pump refrigeration system according to claim 1, characterized in that: The first refrigeration circuit includes a first refrigeration pipe, at least two second stop valves and a second solenoid valve. One end of the first refrigeration pipe is connected to the condenser, and the other end of the first refrigeration pipe is connected to the economizer. The two second stop valves and the second solenoid valve are both installed on the first refrigeration pipe, and the second solenoid valve is located between the two second stop valves.

4. The barrel pump refrigeration system according to claim 1, characterized in that: The second refrigeration pipeline includes a second refrigeration pipe, a third stop valve and a one-way valve. One end of the second refrigeration pipe is connected to the economizer, and the other end of the second refrigeration pipe is connected to the third refrigeration pipeline. The third stop valve and the one-way valve are installed on the second refrigeration pipe.

5. The barrel pump refrigeration system according to claim 1, characterized in that: The fourth refrigeration pipeline includes a fourth refrigeration pipe, a fourth stop valve, a filter, a third solenoid valve and an expansion valve. The two ends of the fourth refrigeration pipe are respectively connected to the third refrigeration pipeline and the fifth refrigeration pipeline. The fourth stop valve, the filter, the third solenoid valve and the expansion valve are assembled on the fourth refrigeration pipe.

6. The barrel pump refrigeration system according to claim 1, characterized in that: The barrel pump refrigeration system also includes a compressor and a cooling pipeline. The compressor is connected to the condenser and the low-pressure circulation barrel. The compressor is connected to the condenser through the cooling pipeline.

7. A barrel pump refrigeration method, characterized in that: The barrel pump refrigeration system according to any one of claims 1 to 6 further comprises the following steps: Obtaining the internal temperature and pressure of the low-pressure circulation barrel; When the temperature and pressure inside the low-pressure circulation barrel are normal, the medium passes through the condenser, the first bypass pipeline, the third refrigeration pipeline, the second bypass pipeline, the fifth refrigeration pipeline and the low-pressure circulation barrel in sequence; In the case of abnormal temperature and / or pressure inside the low-pressure circulation barrel, the medium passes through the condenser, the first refrigeration pipeline, the economizer, the second refrigeration pipeline, the third refrigeration pipeline, the fourth refrigeration pipeline or the second bypass pipeline, the fifth refrigeration pipeline and the low-pressure circulation barrel in sequence, or The medium passes through the first bypass pipeline, the third refrigeration pipeline, the fourth refrigeration pipeline, the fifth refrigeration pipeline and the low-pressure circulation barrel in sequence.

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