Fluorine pump refrigerating system

Abstract

The utility model relates to a fluorine pump refrigerating system which is characterized in that a compressor, a liquid storage tank and a fluorine pump are arranged on a circulation main circuit, circulation branches at least comprise a first circulation branch, a second circulation branch, a third circulation branch and a fourth circulation branch, and one end of a first switching loop is connected with the second circulation branch through a first electromagnetic valve; the other end is connected with the third circulating branch through a second electromagnetic valve; one end of the second switching loop is connected with the first circulation branch through a third electromagnetic valve, and the other end is connected with the fourth circulation branch through a fourth electromagnetic valve; according to the fluorine pump refrigerating system, in the compressor independent operation mode and the fluorine pump independent operation mode, all the condensers and the evaporators adjust the number of the condensers and the number of the evaporators participating in heat exchange according to actual refrigerating requirements, and the refrigerating range is enlarged; in the pressure pump mode, the fluorine pump and the compressor independently operate according to the respective operation modes, and the system energy efficiency and the compressor reliability can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration equipment, and in particular relates to a fluorine pump refrigeration system. Background Art

[0002] Fluorine pump variable frequency machine room air conditioner can make full use of natural cold source, and the energy saving effect is obvious in transitional seasons and winter. Figure 1-Figure 3 In the existing fluorine pump air-conditioning system, the fluorine pump and the compressor refrigeration system share the evaporator, condenser and refrigerant piping system. Both the compressor and the fluorine pump are equipped with bypass valves. When the compressor is in refrigeration mode, the fluorine pump bypass valve is opened and the fluorine pump is closed; when the fluorine pump is in refrigeration mode, the compressor bypass valve is opened and the compressor is closed; when the mixed cooling mode is in operation, the compressor and fluorine pump bypass valves are closed and the compressor and fluorine pump are opened.

[0003] This refrigeration method has the following defects: when the compressor is cooling alone, due to consideration of the reliability of the fluorine pump, it is filled with more refrigerant, resulting in excessive pressure and low energy efficiency when the compressor is running alone; when the fluorine pump is running alone, the head is high, resulting in reduced system energy efficiency; when the pressure pump is running in mixed mode, due to the exhaust temperature difference between the compressor and the fluorine pump, the reliability of the compressor is reduced and the energy-saving effect is not obvious. Utility Model Content

[0004] The purpose of the utility model is to provide a fluorine pump refrigeration system to solve the problems existing in the prior art that during the operation of the fluorine pump air-conditioning system, there are differences in the working performance and status of the compressor and the fluorine pump, and during the operation, the compressor and the fluorine pump have low working energy efficiency, poor reliability, and unclear energy-saving effect.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0006] In one aspect, the utility model provides a fluorine pump refrigeration system, which comprises:

[0007] A main circulation path, on which a compressor, a liquid storage tank and a fluorine pump are arranged, wherein the liquid storage tank is arranged between the output end of the compressor and the input end of the fluorine pump;

[0008] A circulation branch, which at least includes a first circulation branch, a second circulation branch, a third circulation branch and a fourth circulation branch connected to the circulation main road, the first circulation branch and the second circulation branch are arranged in parallel with each other between the output end of the compressor and the input end of the liquid storage tank, and the third circulation branch and the fourth circulation branch are arranged in parallel with each other between the output end of the fluorine pump and the input end of the compressor; a first condenser is arranged on the first circulation branch, a second condenser is arranged on the second circulation branch, a first evaporator is arranged on the third circulation branch, and a second evaporator is arranged on the fourth circulation branch;

[0009] a first switching circuit, one end of which is connected to the second circulation branch through a first solenoid valve, and the other end of which is connected to the third circulation branch through a second solenoid valve;

[0010] The second switching circuit has one end connected to the first circulation branch through the third solenoid valve, and the other end connected to the fourth circulation branch through the fourth solenoid valve.

[0011] In some embodiments of the present application, the first solenoid valve is arranged on a side of the first condenser away from the output port of the compressor, the second solenoid valve is arranged on a side of the second condenser close to the output port of the compressor; the third solenoid valve is arranged on a side of the first evaporator close to the input port of the compressor; the fourth solenoid valve is arranged on a side of the second evaporator away from the input port of the compressor.

[0012] In some embodiments of the present application, a first one-way valve is provided on the main circulation circuit. The first one-way valve is located at the output end of the compressor. The first one-way valve is used to transport the refrigerant from the output end of the compressor to the outside in a one-way manner.

[0013] In some embodiments of the present application, a low-pressure sensor is provided on the main circulation circuit, the low-pressure sensor is located at the input end of the compressor, and the low-pressure sensor is used to perform low-pressure protection on the compressor;

[0014] An exhaust pressure sensor is also provided on the main circulation line. The exhaust pressure sensor is connected to the output end of the first one-way valve and is used to detect the exhaust pressure of the compressor.

[0015] In some embodiments of the present application, a first bypass branch is further included, wherein the first bypass branch is connected in parallel with the compressor, one end of the first bypass branch is connected between the first one-way valve and the exhaust pressure sensor, and the other end is connected to the input end of the low-pressure sensor, and a second one-way valve is arranged on the first bypass branch.

[0016] In some embodiments of the present application, a second bypass branch is further included, wherein the second bypass branch is connected in parallel with the fluorine pump, and a third one-way valve is disposed on the second bypass branch.

[0017] In some embodiments of the present application, a first electronic expansion valve is provided on the third circulation branch, and the first electronic expansion valve is provided between the first evaporator and the fluorine pump;

[0018] The fourth circulation branch is provided with a second electronic expansion valve, and the second electronic expansion valve is arranged between the second evaporator and the fluorine pump.

[0019] In some embodiments of the present application, fans are respectively provided on the sides of the first condenser, the second condenser, the first evaporator and the second evaporator, and the fans are used to drive airflow through the corresponding first condenser, the second condenser, the first evaporator or the second evaporator to achieve heat exchange.

[0020] In some embodiments of the present application, a controller and a temperature sensor are further included. The temperature sensor is used to detect the external ambient temperature. The controller is connected to the temperature sensor, the compressor, the fluorine pump, the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve.

[0021] On the other hand, the present application also proposes a fluorine pump refrigeration system, which comprises:

[0022] A main circulation path, on which a compressor, a liquid storage tank and a fluorine pump are arranged, wherein the liquid storage tank is arranged between the output end of the compressor and the input end of the fluorine pump;

[0023] A condensing cycle assembly connected between the compressor and the liquid storage tank, the condensing cycle assembly comprising at least two condensing branches arranged in parallel with each other, each of the condensing branches being provided with a condenser;

[0024] An evaporation cycle component connected between the fluorine pump and the compressor, the evaporation cycle component comprising at least two evaporation branches arranged in parallel with each other, each of the evaporation branches being provided with an evaporator;

[0025] Wherein, at least one of the compressor and the fluorine pump is connected to the condensation branch and the evaporation branch to operate in compressor mode, fluorine pump mode or pressure-pump mixed mode.

[0026] Compared with the prior art, the advantages and positive effects of the utility model are:

[0027] The fluorine pump refrigeration system involved in the present application comprises at least two condensers and at least two evaporators arranged in parallel with each other. In the compressor single operation mode and the fluorine pump single operation mode, each condenser and evaporator can participate in heat exchange in full or in part. According to the actual refrigeration demand, the number of condensers and evaporators participating in heat exchange is adjusted to increase the refrigeration range.

[0028] In the pressure pump mode, the fluorine pump and the compressor operate independently according to their respective operating modes. The fluorine pump operates at a high frequency to make full use of the natural cold source, and the compressor operates at a low speed to supplement the cold capacity, which is beneficial to improving the system energy efficiency and compressor reliability.

[0029] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 It is a schematic diagram of the flow of the fluorine pump refrigeration system in the prior art;

[0032] Figure 2 It is a schematic diagram of the refrigerant flow in the compressor operation mode in the prior art;

[0033] Figure 3 It is a schematic diagram of the refrigerant flow in the existing technology in which the fluorine pump operates alone;

[0034] Figure 4 One of the fluorine pump refrigeration systems according to the embodiment;

[0035] Figure 5 This is the second fluorine pump refrigeration system according to the embodiment;

[0036] Figure 6 It is a schematic diagram of the flow chart of all load modes of the compressor;

[0037] Figure 7 It is a schematic diagram of the flow chart of the compressor part load mode;

[0038] Figure 8 It is a schematic diagram of the process flow of the pressure pump load mode;

[0039] Fig. 9 This is a schematic diagram of the flow chart of all load modes of the fluorine pump;

[0040] Fig.10 This is a schematic diagram of the partial load mode flow of the fluorine pump;

[0041] Fig.11 The third fluorine pump refrigeration system according to the embodiment;

[0042] Reference numerals:

[0043] 10, main circulation path; 20, first circulation branch; 30, second circulation branch; 40, third circulation branch; 50, fourth circulation branch; 60, first transfer loop; 70, second transfer loop; 80, first bypass branch; 90, second bypass branch; 11, fifth circulation branch; 12, sixth circulation branch; 13, third transfer loop;

[0044] 100, compressor; 200, fluorine pump; 300, liquid storage tank;

[0045] 410, first condenser; 411, first fan; 420, second condenser; 421, second fan; 422, temperature sensor; 430, third condenser;

[0046] 510, first evaporator; 511, third fan; 512, first electronic expansion valve;

[0047] 520, second evaporator; 521, fourth fan; 522, second electronic expansion valve;

[0048] 530, the third evaporator;

[0049] 610, first solenoid valve; 620, second solenoid valve; 630, third solenoid valve; 640, fourth solenoid valve; 650, fifth solenoid valve; 660, sixth solenoid valve;

[0050] 710, first one-way valve; 720, second one-way valve; 730, third one-way valve;

[0051] 800, low pressure sensor;

[0052] 900. Exhaust pressure sensor. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0054] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0056] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0058] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0059] In the present application, the air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation to cool or heat the indoor space.

[0060] The low-temperature and low-pressure refrigerant enters the compressor, which compresses it into high-temperature and high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0061] The expansion valve expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature and low-pressure refrigerant gas to the compressor. The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner can adjust the temperature of the indoor space.

[0062] The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

[0063] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0064] refer to Figure 4 The present application proposes a fluorine pump 200 refrigeration system, which includes a main circulation circuit 10 and a circulation branch circuit.

[0065] A compressor 100 , a liquid storage tank 300 and a fluorine pump 200 are arranged on the main circulation path 10 . The liquid storage tank 300 is arranged between the output end of the compressor 100 and the input end of the fluorine pump 200 .

[0066] The circulation branch at least includes a first circulation branch 20 , a second circulation branch 30 , a third circulation branch 40 and a fourth circulation branch 50 connected to the circulation main path 10 .

[0067] Specifically, at least a first circulation branch 20 and a second circulation branch 30 are arranged in parallel between the output end of the compressor 100 and the input end of the liquid storage tank 300 .

[0068] At least a third circulation branch 40 and a fourth circulation branch 50 are arranged in parallel between the output end of the fluorine pump 200 and the input end of the compressor 100 .

[0069] A heat exchanger is provided on each circulation branch. Specifically, a first condenser 410 is provided on the first circulation branch 20, a second condenser 420 is provided on the second circulation branch 30, a first evaporator 510 is provided on the third circulation branch 40, and a second evaporator 520 is provided on the fourth circulation branch 50.

[0070] A first switching loop 60 is provided between the first circulation branch 20 and the third circulation branch 40 .

[0071] Specifically, one end of the first switching circuit 60 is connected to the second circulation branch 30 through the first solenoid valve 610 , and the other end is connected to the third circulation branch 40 through the second solenoid valve 620 .

[0072] The first solenoid valve 610 and the second solenoid valve 620 are both three-way valves, and the on-off of at least two valve ports in the solenoid valve can be controlled by a controller.

[0073] The controller can control the on-off between the second circulation branch 30 and the first switching circuit 60 through the first solenoid valve 610 , and control the on-off between the third circulation branch 40 and the first switching circuit 60 through the second solenoid valve 620 .

[0074] A second switching loop 70 is provided between the second circulation branch 30 and the fourth circulation branch 50 .

[0075] Specifically, one end of the second switching circuit 70 is connected to the first circulation branch 20 through the third solenoid valve 630 , and the other end is connected to the fourth circulation branch 50 through the fourth solenoid valve 640 .

[0076] The third solenoid valve 630 and the fourth solenoid valve 640 are also three-way valves, and the on-off of at least two valve ports in the solenoid valves can be controlled by a controller.

[0077] The opening and closing of the second switching circuit 70 and the first circulation branch 20 are controlled by the third solenoid valve 630 , and the opening and closing of the second switching circuit 70 and the fourth circulation branch 50 are controlled by the fourth solenoid valve 640 .

[0078] Specifically, the first solenoid valve 610 is disposed on a side of the second condenser 420 close to the output port of the compressor 100 .

[0079] The second solenoid valve 620 is disposed on a side of the first evaporator 510 close to the input port of the compressor 100 .

[0080] The third solenoid valve 630 is disposed at a side of the first condenser 410 away from the outlet of the compressor 100 .

[0081] The fourth solenoid valve 640 is disposed on a side of the second evaporator 520 away from the input port of the compressor 100 .

[0082] refer to Figure 5 A first one-way valve 710 is provided on the main circulation path 10. The first one-way valve 710 is located at the output end of the compressor 100. The first one-way valve 710 is used to transport the refrigerant from the output end of the compressor 100 to the outside in a one-way manner.

[0083] A low pressure sensor 800 is provided on the main circulation path 10 . The low pressure sensor 800 is located at the input end of the compressor 100 . The low pressure sensor 800 is used to perform low pressure protection on the compressor 100 .

[0084] An exhaust pressure sensor 900 is also provided on the main circulation path 10 . The exhaust pressure sensor 900 is connected to the output end of the first one-way valve 710 . The exhaust pressure sensor 900 is used to detect the exhaust pressure of the compressor 100 .

[0085] A first bypass branch 80 is also arranged in parallel outside the compressor 100. One end of the first bypass branch 80 is connected between the first one-way valve 710 and the exhaust pressure sensor 900, and the other end is connected to the input end of the low-pressure sensor 800. A second one-way valve 720 is arranged on the first bypass branch 80.

[0086] The second bypass branch 90 is also included. The second bypass branch 90 is connected in parallel with the fluorine pump 200 . A third one-way valve 730 is disposed on the second bypass branch 90 .

[0087] A first electronic expansion valve 512 is disposed on the third circulation branch 40 , and the first electronic expansion valve 512 is disposed between the first evaporator 510 and the fluorine pump 200 .

[0088] The fourth circulation branch 50 is provided with a second electronic expansion valve 522 , and the second electronic expansion valve 522 is arranged between the second evaporator 520 and the fluorine pump 200 .

[0089] Fan components are respectively disposed on the sides of the first condenser 410 , the second condenser 420 , the first evaporator 510 , and the second evaporator 520 .

[0090] Specifically, a first fan 411 is disposed beside the first condenser 410 , and a second fan 421 is disposed beside the second condenser 420 ; a third fan 511 is disposed beside the first evaporator 510 , and a fourth fan 521 is disposed beside the second evaporator 520 .

[0091] Each fan component is used to drive airflow to flow through the corresponding first condenser 410, the second condenser 420, the first evaporator 510 or the second evaporator 520 to achieve heat exchange.

[0092] The refrigeration system of the fluorine pump 200 also includes a controller and a temperature sensor 422. The temperature sensor 422 is used to detect the external ambient temperature. The controller is connected to the temperature sensor 422, the compressor 100, the fluorine pump 200, the first solenoid valve 610, the second solenoid valve 620, the third solenoid valve 630 and the fourth solenoid valve 640.

[0093] The controller and the temperature sensor 422 are arranged on the outer shell of the refrigeration system of the fluorine pump 200. An air inlet is formed on the outer shell. The temperature sensor 422 can be arranged in the air inlet to detect the temperature of the external air flow input from the air inlet.

[0094] Alternatively, the temperature sensor 422 is installed on the outside of the outer shell to directly detect the external temperature.

[0095] The controller operates the compressor 100 mode, the pressure pump mixed mode and the fluorine pump 200 mode accordingly according to the external temperature T detected by the temperature sensor 422 .

[0096] Specifically, when the external temperature T sensed by the temperature sensor 422 is not lower than the upper temperature limit Tmax, at this time, the external ambient temperature is relatively high, and the controller controls the fluorine pump 200 refrigeration system to operate the compressor 100 mode. In this mode, the compressor 100 is started alone, and the compressor 100 runs at a low speed according to the actual operating conditions to supplement the cooling capacity, thereby improving the system energy efficiency and the reliability of the compressor 100.

[0097] When the external temperature T sensed by the temperature sensor 422 is not higher than the lower temperature limit Tmin, in this state, the external ambient temperature is relatively low. In order to make full use of the external cold source, the controller controls the fluorine pump 200 refrigeration system to run the fluorine pump 200 mode. In this mode, the fluorine pump 200 is started alone and runs at a high frequency to make full use of the natural cold source.

[0098] When the external temperature T sensed by the temperature sensor 422 is between the lower temperature limit Tmin and the upper temperature limit Tmax, the external environment is in a transitional environment, and the controller controls the refrigeration system of the fluorine pump 200 to operate in a pressure-pump mixed mode.

[0099] The following is a detailed description of the compressor 100 mode, the fluorine pump 200 mixed mode and the fluorine pump 200 mode:

[0100] 1. Compressor 100 mode:

[0101] The compressor 100 mode specifically includes a full load mode and a partial load mode:

[0102] refer to Figure 6 , compressor 100 full load mode:

[0103] In this mode, the refrigerant circulates through all the evaporators and condensers to achieve the highest cooling capacity operation, at which time the energy efficiency of the entire machine is the highest.

[0104] In the partial load mode of the compressor 100, a part of the refrigerant in the system is cooled through the evaporator and the condenser, and the other part of the refrigerant is bypassed to the compressor 100 through the first solenoid valve 610 and the second solenoid valve 620 to achieve unloading operation. The partial load mode can increase the cooling capacity range of the unit and is suitable for use when the installed capacity of the computer room is not high.

[0105] Compressor 100 full load mode:

[0106] The controller controls the fluorine pump 200 to shut down, the compressor 100 to start, the first condenser 410, the second condenser 420, the first evaporator 510 and the second evaporator 520 to start, the first check valve 710 and the third check valve 730 to connect, and the second check valve 720 to disconnect.

[0107] The first solenoid valve 610 connects the second circulation branch 30 and disconnects the second circulation branch 30 from the first switching circuit 60 .

[0108] The third circulation branch 40 is connected by the second solenoid valve 620, and the third circulation branch 40 is disconnected from the first switching circuit 60;

[0109] The first circulation branch 20 is connected by the third solenoid valve 630, and the first circulation branch 20 is disconnected from the second switching circuit 70;

[0110] The fourth circulation branch 50 is connected by the fourth solenoid valve 640 , and the fourth circulation branch 50 is disconnected from the second switching circuit 70 .

[0111] The refrigerant output by the compressor 100 is transported forward through the main circulation path 10, and is transported to the first condenser 410 through the first circulation branch 20 and to the second condenser 420 through the second circulation branch 30. The refrigerant after heat exchange in the condenser passes through the first bypass branch 80 connected in parallel with the fluorine pump 200, and is transported to the first evaporator 510 through the third circulation branch 40 and to the second evaporator 520 for heat exchange through the fourth circulation branch 50, and is finally transported back to the compressor 100.

[0112] refer to Figure 7 , compressor 100 part load mode:

[0113] The controller controls the fluorine pump 200 to shut down, the compressor 100 to start, the first condenser 410 to start, the second condenser 420 to shut down, the first evaporator 510 to shut down, and the second evaporator 520 to start;

[0114] The first one-way valve 710 and the third one-way valve 730 are connected, and the second one-way valve 720 is disconnected.

[0115] The first solenoid valve 610 and the second solenoid valve 620 connect the second circulation branch 30 , the first switching circuit 60 , and the third circulation branch 40 .

[0116] The third solenoid valve 630 connects the first circulation branch 20 , and the fourth solenoid valve 640 connects the fourth circulation branch 50 .

[0117] The refrigerant output from the compressor 100 is divided into two paths, one path passes through the first condenser 410 and the first evaporator 510 to participate in the refrigeration cycle, and the other path is unloaded.

[0118] Specifically, the refrigerant output from the compressor 100 passes through the first condenser 410 , is transported from the second bypass branch 90 to the second evaporator 520 for heat exchange, and is then transported back to the compressor 100 .

[0119] Another refrigerant output from the compressor 100 is input back to the compressor 100 after passing through the first solenoid valve 610, the first switching circuit 60, and the second solenoid valve 620 to achieve the purpose of unloading. The partial load mode can increase the cooling capacity range of the unit and is suitable for use when the installation rate of the computer room is not high.

[0120] 2. Pump compound mode:

[0121] refer to Figure 8 In the pressure-pump compound mode, the fluorine pump 200 and the compressor 100 are operated separately by adjusting the opening of each electric three-way valve. The fluorine pump 200 runs at full speed to make full use of the natural cold source, and the compressor 100 performs supplementary cooling operation.

[0122] The controller controls the first solenoid valve 610 to connect the first switching circuit 60 with the second circulation branch 30;

[0123] The controller controls the second solenoid valve 620 to connect the third circulation branch 40, the first switching circuit 60 and the fourth circulation branch 50;

[0124] The controller controls the third solenoid valve 630 to connect the first circulation branch 20 with the second switching circuit 70;

[0125] The controller controls the fourth solenoid valve 640 to connect the second switching circuit 70 and the fourth circulation branch 50;

[0126] The first one-way valve 710 is closed, and the second one-way valve 720 and the third one-way valve 730 are opened.

[0127] Specifically, the fluorine pump 200 cycle in the pressure-pump compound mode is:

[0128] The refrigerant output by the fluorine pump 200 passes through the first electronic expansion valve 512 on the third circulation branch 40 and the first evaporator 510 for heat exchange, and then passes through the second solenoid valve 620, the first switching circuit 60, and the first solenoid valve 610 in sequence and is transported to the second condenser 420 on the second circulation branch 30, and finally is transported back to the fluorine pump 200 through the liquid storage tank 300.

[0129] The compressor 100 cycle in the pressure-pump compound mode is:

[0130] The refrigerant output by the compressor 100 is transported to the first circulation branch 20 through the first one-way valve 710 and the main circulation path 10, and after heat exchange in the first condenser 410, it is transported to the fourth circulation branch 50 through the second switching circuit 70, and finally after heat exchange in the second evaporator 520, it is transported back to the compressor 100.

[0131] 3. Fluorine pump 200 mode:

[0132] The fluorine pump 200 mode is similar to the compressor 100 mode. Through the mutual adjustment of various solenoid valves, the full load mode and the partial load mode are realized to achieve a wider refrigeration range.

[0133] refer to Fig. 9 , in all load modes of fluorine pump 200 mode:

[0134] The controller controls the first solenoid valve 610 to connect the second circulation branch 30 and the first switching circuit 60 is connected to the second circulation branch 30 .

[0135] The controller controls the second solenoid valve 620 to connect the third circulation branch 40 , and the first switching circuit 60 is connected to the third circulation branch 40 .

[0136] The controller controls the third solenoid valve 630 to connect the first circulation branch 20 , and the first circulation branch 20 is connected to the second switching circuit 70 .

[0137] The controller controls the fourth solenoid valve 640 to connect the fourth circulation branch 50 , and the fourth circulation branch 50 is connected to the second switching circuit 70 .

[0138] The first one-way valve 710 , the second one-way valve 720 , and the third one-way valve 730 are in an open state.

[0139] The refrigerant output by the fluorine pump 200 passes through the third circulation branch 40 and the fourth circulation branch 50 respectively, and after heat exchange in the corresponding first evaporator 510 and the second evaporator 520, it is transported to the first circulation branch 20 and the second circulation branch 30 through the second solenoid valve 620 and the first switching circuit 60. After heat exchange in the corresponding first condenser 410 and the second condenser 420, it is transported back to the fluorine pump 200 through the main circulation circuit 10 and the liquid storage tank 300, completing the entire load cycle under the fluorine pump 200 mode.

[0140] refer to Fig.10 , in partial load mode of fluorine pump 200 mode:

[0141] The controller controls the first solenoid valve 610 to connect the first switching circuit 60 with the second circulation branch 30 .

[0142] The controller controls the second solenoid valve 620 to connect the first switching circuit 60 with the fourth circulation branch 50 .

[0143] The controller controls the valve port of the third solenoid valve 630 to be disconnected.

[0144] The controller controls the fourth solenoid valve 640 to connect the fourth circulation branch 50 , and disconnects the fourth circulation branch 50 from the second switching circuit 70 .

[0145] The first one-way valve 710 , the second one-way valve 720 , and the third one-way valve 730 are in an open state.

[0146] The refrigerant output by the fluorine pump 200 is transported to the second evaporator 520 for heat exchange through the fourth solenoid valve 640, and then transported to the second circulation branch 30 through the second solenoid valve 620, the first switching circuit 60 and the first solenoid valve 610. After heat exchange in the second condenser 420, it is finally transported back to the fluorine pump 200 through the liquid storage tank 300.

[0147] Alternatively, the first solenoid valve 610 may also only connect the first switching circuit 60 to the first circulation branch 20 so that the refrigerant output from the first switching circuit 60 is transported to the first circulation branch 20, and after heat exchange in the first condenser 410, is transported back to the fluorine pump 200.

[0148] The present application realizes the partial load operation function of the compressor 100 mode and the fluorine pump 200 mode by setting the solenoid valve on the circulation branch, thereby increasing the refrigeration operation range; the fluorine pump 200 mixed mode enables the compressor 100 and the fluorine pump 200 to operate independently, thus avoiding the problem of reduced reliability of the compressor 100 and reduced energy efficiency of the whole machine in the traditional air-conditioning mixed mode. At the same time, the full operation of the fluorine pump 200 improves the utilization rate of the natural cold source and the energy efficiency of the whole machine.

[0149] refer to Fig.11The present application also proposes a fluorine pump 200 refrigeration system, which includes a main circulation path 10, a condensation circulation component and an evaporation circulation component.

[0150] The main circulation path 10 is provided with a compressor 100, a liquid storage tank 300 and a fluorine pump 200, and the liquid storage tank 300 is provided between the output end of the compressor 100 and the input end of the fluorine pump 200;

[0151] The condensation cycle component is connected between the compressor 100 and the liquid storage tank 300, and the condensation cycle component includes at least two condensation branches arranged in parallel with each other, and each condensation branch is provided with a condenser.

[0152] The evaporation cycle component is connected between the fluorine pump 200 and the compressor 100. The evaporation cycle component includes at least two evaporation branches arranged in parallel with each other, and each evaporation branch is provided with an evaporator.

[0153] At least one of the compressor 100 and the fluorine pump 200 is connected to the condensation branch and the evaporation branch to operate in the compressor 100 mode, the fluorine pump 200 mode or the pressure-pump mixed mode.

[0154] In compressor 100 mode, fluorine pump 200 is bypassed, and only compressor 100 participates in the refrigeration cycle. In fluorine pump 200 mode, compressor 100 is bypassed, and only fluorine pump 200 participates in the refrigeration cycle. In pressure-pump mixed mode, both compressor 100 and fluorine pump 200 participate in the refrigeration cycle.

[0155] In some embodiments of the present application, the condensation circulation component includes three groups of circulation branches arranged in parallel, namely the first circulation branch 20, the second circulation branch 30 and the fifth circulation branch 11, to which the first condenser 410, the second condenser 420 and the third condenser 430 are respectively connected.

[0156] The evaporation circulation assembly includes three sets of circulation branches arranged in parallel, namely the third circulation branch 40, the fourth circulation branch 50 and the sixth circulation branch 12, on which the first evaporator 510, the second evaporator 520 and the third evaporator 530 are respectively arranged.

[0157] The second circulation branch 30 and the third circulation branch 40 are connected via a first switching loop 60 , the first circulation branch 20 and the fourth circulation branch 50 are connected via a second switching loop 70 , and the fifth circulation branch 11 and the sixth circulation branch 12 are connected via a third switching loop 13 .

[0158] Specifically, one end of the first switching circuit 60 is connected to the second circulation branch 30 through the first solenoid valve 610 , and the other end is connected to the third circulation branch 40 through the second solenoid valve 620 .

[0159] One end of the second switching circuit 70 is connected to the first circulation branch 20 through the third solenoid valve 630 , and the other end is connected to the fourth circulation branch 50 through the fourth solenoid valve 640 .

[0160] One end of the third switching circuit 13 is connected to the fifth circulation branch 11 through the fifth solenoid valve 650 , and the other end is connected to the sixth circulation branch 12 through the sixth solenoid valve 660 .

[0161] Specifically, the first solenoid valve 610 is disposed on a side of the second condenser 420 close to the output port of the compressor 100 .

[0162] The second solenoid valve 620 is disposed on a side of the first evaporator 510 close to the input port of the compressor 100 .

[0163] The third solenoid valve 630 is disposed at a side of the first condenser 410 away from the outlet of the compressor 100 .

[0164] The fourth solenoid valve 640 is disposed on a side of the second evaporator 520 away from the input port of the compressor 100 .

[0165] The fifth solenoid valve 650 is located on the side of the third condenser 430 away from the outlet of the compressor 100.

[0166] The sixth solenoid valve 660 is located at a side of the third evaporator 530 away from the inlet of the compressor 100 .

[0167] Next, with respect to the circuit involved in this embodiment, the compressor 100 mode, the fluorine pump 200 mixed mode and the fluorine pump 200 mode are specifically described:

[0168] 1. Compressor 100 mode:

[0169] The compressor 100 mode specifically includes a full load mode and a partial load mode:

[0170] Compressor 100 full load mode:

[0171] In this mode, the refrigerant circulates through all the evaporators and condensers to achieve the highest cooling capacity operation, at which time the energy efficiency of the entire machine is the highest.

[0172] Compressor 100 part load mode:

[0173] After a part of the refrigerant in the system passes through the first condenser 410 and the third condenser 430 for heat exchange, it is delivered to the branch liquid storage tank 300, and then is delivered to the first evaporator 510 and the third evaporator 530 respectively through the third one-way valve 730 to realize refrigeration. The other part of the refrigerant is bypassed to the compressor 100 through the first solenoid valve 610 and the second solenoid valve 620 to realize unloading operation. The partial load mode can increase the cooling capacity range of the unit and is suitable for use when the installed capacity of the computer room is not high.

[0174] 2. Pump compound mode:

[0175] In the pressure-pump compound mode, the fluorine pump 200 and the compressor 100 are operated independently by adjusting the opening of each electric three-way valve. The fluorine pump 200 runs at full speed to fully utilize the natural cold source, and the compressor 100 performs supplementary cooling operation.

[0176] The 200 cycles of the fluorine pump in the pressure-pump compound mode are;

[0177] The refrigerant output by the fluorine pump 200 passes through the first electronic expansion valve 512 on the third circulation branch 40 and the first evaporator 510 for heat exchange, and then passes through the second solenoid valve 620, the first switching circuit 60, and the first solenoid valve 610 in sequence to be transported to the second condenser 420 on the second circulation branch 30, and finally is transported back to the fluorine pump 200 through the liquid storage tank 300.

[0178] The compressor 100 cycle in the pressure-pump compound mode is:

[0179] The refrigerant output by the compressor 100 is transported to the first circulation branch 20 and the third circulation branch 40 through the first one-way valve 710 and the main circulation path 10, and after heat exchange in the first condenser 410 and the third condenser 430, it is transported to the fourth circulation branch 50 and the sixth circulation branch 12 through the second transfer loop 70 and the third transfer loop 13 respectively, and finally after heat exchange in the second evaporator 520 and the third evaporator 530, it is transported back to the compressor 100.

[0180] 3. Fluorine pump 200 mode:

[0181] The fluorine pump 200 mode is similar to the compressor 100 mode. Through the mutual adjustment of various solenoid valves, the full load mode and the partial load mode are realized to achieve a wider refrigeration range.

[0182] Under all load modes of fluorine pump 200 mode:

[0183] The refrigerant output by the fluorine pump 200 passes through the third circulation branch 40, the fourth circulation branch 50 and the sixth circulation branch 12 respectively, and after heat exchange in the corresponding first evaporator 510, the second evaporator 520 and the third evaporator 530, it is transported to the first circulation branch 20, the second circulation branch 30 and the fifth circulation branch 11 through the second solenoid valve 620 and the first switching circuit 60, and after heat exchange in the corresponding first condenser 410, the second condenser 420 and the third condenser 430, it is returned to the fluorine pump 200 through the main circulation path 10 and the liquid storage tank 300, completing the entire load cycle under the fluorine pump 200 mode.

[0184] In partial load mode of fluorine pump 200 mode:

[0185] The refrigerant output by the fluorine pump 200 passes through one or two of the third circulation branch 40, the fourth circulation branch 50 and / or the sixth circulation branch 12, and after heat exchange in the corresponding evaporator, is transported from the corresponding switching circuit to the first circulation branch 20, the second circulation branch 30 and / or the sixth circulation branch 12, and finally is transported back to the fluorine pump 200 through the liquid storage tank 300.

[0186] The refrigerant flow path in the partial load mode of the fluorine pump 200 mode is not unique, and multiple flow paths can be achieved according to the control of each solenoid valve.

[0187] The fluorine pump 200 refrigeration system involved in the present application includes at least two condensers and at least two evaporators arranged in parallel. In the compressor 100 single operation mode and the fluorine pump 200 single operation mode, each condenser and evaporator can participate in heat exchange in full or in part. According to the actual refrigeration demand, the number of condensers and evaporators participating in heat exchange is adjusted to increase the refrigeration range.

[0188] In the pressure pump mode, the fluorine pump 200 and the compressor 100 operate independently according to their respective operating modes. The fluorine pump 200 operates at a high frequency to make full use of the natural cold source, and the compressor 100 operates at a low speed to supplement the cold capacity, which is beneficial to improving the system energy efficiency and the reliability of the compressor 100.

[0189] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0190] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by technicians familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A fluorine pump refrigeration system, characterized in that: include: A main circulation path, on which a compressor, a liquid storage tank and a fluorine pump are arranged, wherein the liquid storage tank is arranged between the output end of the compressor and the input end of the fluorine pump; A circulation branch, which at least includes a first circulation branch, a second circulation branch, a third circulation branch and a fourth circulation branch connected to the circulation main road, the first circulation branch and the second circulation branch are arranged in parallel with each other between the output end of the compressor and the input end of the liquid storage tank, and the third circulation branch and the fourth circulation branch are arranged in parallel with each other between the output end of the fluorine pump and the input end of the compressor; a first condenser is arranged on the first circulation branch, a second condenser is arranged on the second circulation branch, a first evaporator is arranged on the third circulation branch, and a second evaporator is arranged on the fourth circulation branch; A first switching circuit, one end of which is connected to the second circulation branch through a first solenoid valve, and the other end of which is connected to the third circulation branch through a second solenoid valve; The second switching circuit has one end connected to the first circulation branch through the third solenoid valve, and the other end connected to the fourth circulation branch through the fourth solenoid valve.

2. The fluorine pump refrigeration system according to claim 1, characterized in that: The first solenoid valve is arranged on a side of the first condenser away from the output port of the compressor, and the second solenoid valve is arranged on a side of the second condenser close to the output port of the compressor; the third solenoid valve is arranged on a side of the first evaporator close to the input port of the compressor; and the fourth solenoid valve is arranged on a side of the second evaporator away from the input port of the compressor.

3. The fluorine pump refrigeration system according to claim 1, characterized in that: The main circulation line is provided with a first one-way valve, which is located at the output end of the compressor. The first one-way valve is used to transport the refrigerant from the output end of the compressor to the outside in a one-way manner.

4. The fluorine pump refrigeration system according to claim 3, characterized in that: A low-pressure sensor is provided on the main circulation circuit, the low-pressure sensor is located at the input end of the compressor, and the low-pressure sensor is used to perform low-pressure protection on the compressor; An exhaust pressure sensor is also provided on the main circulation line. The exhaust pressure sensor is connected to the output end of the first one-way valve and is used to detect the exhaust pressure of the compressor.

5. The fluorine pump refrigeration system according to claim 4, characterized in that: It also includes a first bypass branch, which is connected in parallel with the compressor, one end of the first bypass branch is connected between the first one-way valve and the exhaust pressure sensor, and the other end is connected to the input end of the low-pressure sensor, and a second one-way valve is arranged on the first bypass branch.

6. The fluorine pump refrigeration system according to claim 5, characterized in that: It also includes a second bypass branch, which is connected in parallel with the fluorine pump and is provided with a third one-way valve.

7. The fluorine pump refrigeration system according to claim 1, characterized in that: The third circulation branch is provided with a first electronic expansion valve, and the first electronic expansion valve is arranged between the first evaporator and the fluorine pump; The fourth circulation branch is provided with a second electronic expansion valve, and the second electronic expansion valve is arranged between the second evaporator and the fluorine pump.

8. The fluorine pump refrigeration system according to claim 1, characterized in that: The first condenser, the second condenser, the first evaporator and the second evaporator are respectively provided with fan components, and the fan components are used to drive the air flow to flow through the corresponding first condenser, the second condenser, the first evaporator or the second evaporator to achieve heat exchange.

9. The fluorine pump refrigeration system according to claim 1, characterized in that: It also includes a controller and a temperature sensor, wherein the temperature sensor is used to detect the external environment temperature, and the controller is connected with the temperature sensor, the compressor, the fluorine pump, the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve.

10. A fluorine pump refrigeration system, characterized in that: include: A main circulation path, on which a compressor, a liquid storage tank and a fluorine pump are arranged, wherein the liquid storage tank is arranged between the output end of the compressor and the input end of the fluorine pump; A condensing cycle assembly connected between the compressor and the liquid storage tank, the condensing cycle assembly comprising at least two condensing branches arranged in parallel with each other, each of the condensing branches being provided with a condenser; An evaporation cycle component connected between the fluorine pump and the compressor, the evaporation cycle component comprising at least two evaporation branches arranged in parallel with each other, each of the evaporation branches being provided with an evaporator; Wherein, at least one of the compressor and the fluorine pump is connected to the condensation branch and the evaporation branch to operate in compressor mode, fluorine pump mode or pressure-pump mixed mode.

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