Carrying device for transferring refrigerant in refrigerating system

Abstract

The utility model relates to the technical field of refrigeration, in particular to a carrying device for transferring refrigerants in a refrigeration system, which comprises a refrigerant transferring tank, the refrigerant transferring tank contains the refrigerants, and an inlet of the refrigerant transferring tank is connected with an evaporator of the refrigeration system through a pipeline. An outlet of the refrigerant transfer tank is connected with a condenser of the refrigerating system through a pipeline, a liquid level sensor is arranged in the refrigerant transfer tank, the liquid level sensor is used for detecting the liquid level of the refrigerant, and the purpose of reducing the filling amount of the refrigerating system is achieved by reducing the filling amount of the refrigerant on the high-pressure side.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to a refrigerant transfer carrying device in a refrigeration system. Background Art

[0002] Currently, ammonia and Freon remain common refrigerants in large-scale refrigeration systems. Due to its toxicity and pungent odor, ammonia has been included in the list of major hazardous sources and, depending on recharge volume indicators, could potentially become a major hazard to enterprises. Freon has a limited lifespan due to its greenhouse effect and ozone depletion effects, leading to the ongoing pursuit of new, environmentally friendly refrigerants. Reducing refrigerant charge usage is a viable measure to mitigate risks and reduce environmental pollution.

[0003] like Figure 1 As shown, 40%-60% of the refrigerant charge is located in the high-pressure accumulator, which acts as a high- and low-pressure liquid seal and buffer. Reducing the charge level in the high-pressure accumulator is an effective way to reduce the refrigerant charge in the entire system. Most refrigeration systems distribute refrigerant by controlling the liquid level at the low-pressure end, without controlling the liquid level in the high-pressure accumulator.

[0004] Currently, there is a product on the market that solves the problem of high-pressure side filling volume - high-pressure float valve, which completely replaces the high-pressure liquid storage tank and plays the role of high-pressure liquid storage and high-pressure liquid level control. However, due to product structure limitations, the use of the product is also limited to a cooling capacity of 1930kW (ammonia) and 562kW (R22). In summary, the existing technology has the following defects

[0005] 1. The cooling capacity of the existing float valve is limited;

[0006] 2. Digital transmission cannot be achieved;

[0007] 3. The refrigerants used in float valves are limited and cannot be used in environments with explosive refrigerants such as propane and propylene.

[0008] Based on this, the present invention provides a refrigerant transfer device in a refrigeration system, which reduces the refrigerant charge on the high-pressure side, thereby achieving the purpose of reducing the charge amount of the refrigeration system. Utility Model Content

[0009] The utility model aims to at least solve the problem in the prior art that the refrigerant charge amount is difficult to effectively reduce.

[0010] This solution provides a refrigerant transfer device in a refrigeration system, which is achieved by the following specific technical means: comprising a refrigerant transfer tank, the refrigerant transfer tank containing refrigerant is used to replace the traditional refrigeration system high-pressure liquid accumulator, and refrigerant transfer tanks of different specifications are provided according to the refrigeration demand of the system;

[0011] The inlet of the refrigerant transfer tank is connected to the evaporator of the refrigeration system through a pipeline;

[0012] The outlet of the refrigerant transfer tank is connected to the condenser of the refrigeration system through a pipeline;

[0013] A liquid level sensor is provided in the refrigerant transfer tank, and the refrigerant liquid level is detected by the liquid level sensor.

[0014] Preferred technical solution 1: A control valve group is provided on the connecting pipe between the refrigerant transfer tank and the evaporator, and the flow of the refrigerant is controlled by opening and closing the control valve group.

[0015] Preferred technical solution 2: A transport device for transferring refrigerant in a refrigeration system, further comprising a controller, wherein the controller is electrically connected to the liquid level sensor and the control valve group.

[0016] Preferred technical solution three: The control valve group adopts a solenoid valve + manual throttle valve combination to realize the on-off control of the pipeline, and can also adopt a solenoid valve + electric valve combination or a pneumatic control valve combination to realize PID control of the liquid level.

[0017] Preferred technical solution four: the controller is a visual controller.

[0018] Preferred technical solution five: The controller is provided with a remote transmission port to realize remote transmission and storage of information.

[0019] Preferred Technical Solution 6: The control valve group, liquid level sensor and controller select corresponding explosion-proof measures according to the explosion-proof level of the equipment area.

[0020] The above structure enables this solution to have the following beneficial effects:

[0021] 1. The liquid level controls the high-pressure part but does not control the low-pressure liquid level;

[0022] 2. Use a refrigerant transfer tank with a small storage capacity. The size of the transfer tank can be selected as needed to reduce the amount of refrigerant charged;

[0023] 3. It adopts electronic control mode and has a friendly human-machine interface;

[0024] 4. The electronic control method can realize long-distance transmission and storage of data;

[0025] 5. Flexible option configuration is adopted to meet the usage scenarios of safe refrigerants and explosive refrigerants. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a structural diagram of the prior art;

[0028] Figure 2 This is a structural diagram of this scheme.

[0029] Among them, 1. High-pressure liquid receiver; 2. Evaporator; 3. Compressor; 4. Condenser;

[0030] 5. Refrigerant transfer tank; 6. Liquid level sensor; 7. Controller; 8. Control valve group. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] See also Figure 2 , a refrigerant transfer carrier in a refrigeration system, comprising a refrigerant transfer tank 5, the refrigerant transfer tank 5 containing refrigerant, and used to replace a conventional high-pressure liquid accumulator 1 of a refrigeration system;

[0033] The inlet of the refrigerant transfer tank 5 is connected to the evaporator 2 of the refrigeration system through a pipeline;

[0034] The outlet of the refrigerant transfer tank 5 is connected to the condenser 4 of the refrigeration system through a pipeline;

[0035] A liquid level sensor 6 is provided in the refrigerant transfer tank 5, and the refrigerant liquid level is detected by the liquid level sensor 6. The liquid level sensor 6 adopts an analog signal sensor or a switching value liquid level switch;

[0036] A control valve group 8 is provided on the connecting pipe between the refrigerant transfer tank 5 and the evaporator 2, and the flow of the refrigerant is controlled by opening and closing the control valve group 8; according to the refrigeration demand of the system, different specifications of the refrigerant transfer tank 5 are set to make the liquid level control stable and reliable. A reasonable refrigerant transfer tank 5 is set to meet the demand for stable liquid level control on the high-pressure side, reduce the filling amount of refrigerant on the high-pressure side, control the liquid level on the high-pressure side, realize the high-low pressure liquid sealing function, and avoid unnecessary energy waste caused by the high-pressure gas entering the low-pressure end;

[0037] The controller 7 is also included. The controller 7 is electrically connected to the liquid level sensor 6 and the control valve group 8, receives the liquid level signal sent by the liquid level sensor 6, and adjusts the opening of the control valve group 8;

[0038] The liquid level sensor 6, model LT01 monitors the liquid level of the refrigerant in the refrigerant transfer tank 5 in real time and transmits it to the controller 7, model LC01. When the liquid level reaches the high liquid level setting value, the controller 7 issues a command to open the control valve group 8, model SV01; when the liquid level drops to the low liquid level control point, the control valve group 8 is closed. The liquid level controls the high-pressure part and does not control the low-pressure end liquid level.

[0039] See also Figure 2 , the carrier device for refrigerant transfer in the refrigeration system, the control valve group 8 adopts a solenoid valve + manual throttle valve combination to realize the switch control of the pipeline, and can also adopt a solenoid valve + electric valve combination or a pneumatic control valve combination to realize PID control of the liquid level.

[0040] See also Figure 2 The carrier device for transferring refrigerant in the refrigeration system uses an intelligent instrument or a programmable control instrument. The controller 7 is preferably a visual controller to monitor the liquid level information and issue reasonable control instructions to the control valve group 8. The human-machine interface is friendly. The carrier device is fully automatically electrically controlled by the controller 7. Information such as the liquid level and valve opening can be remotely transmitted to the host computer through the controller 7 to realize digital delivery between the human and the machine.

[0041] The controller 7 is provided with a remote transmission port, which can realize the remote transmission and storage of information.

[0042] See also Figure 2 , a carrier device for transferring refrigerant in the refrigeration system, the control valve group 8, the liquid level sensor 6 and the controller 7 are respectively the explosion-proof control valve group, the explosion-proof liquid level sensor and the explosion-proof controller. Select corresponding explosion-proof measures according to the explosion-proof level of the equipment area.

[0043] The device can be configured to suit the system size, regardless of cooling capacity. The refrigerant charge can be reduced by 30-60%, depending on the system configuration.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A refrigerant transfer device in a refrigeration system, characterized by: It comprises a refrigerant transfer tank (5), wherein the refrigerant transfer tank (5) contains refrigerant; The inlet of the refrigerant transfer tank (5) is connected to the evaporator (2) of the refrigeration system through a pipeline; The outlet of the refrigerant transfer tank (5) is connected to the condenser (4) of the refrigeration system through a pipeline; A liquid level sensor (6) is provided in the refrigerant transfer tank (5), and the liquid level sensor (6) is used to detect the liquid level of the refrigerant in the refrigerant transfer tank (5).

2. The refrigerant transfer device in a refrigeration system according to claim 1, characterized in that: A control valve group (8) is provided on the connecting pipe between the refrigerant transfer tank (5) and the evaporator (2).

3. The refrigerant transfer device in a refrigeration system according to claim 2, characterized in that: The invention also includes a controller (7), which is electrically connected to the liquid level sensor (6) and the control valve group (8) and is used to receive the liquid level signal sent by the liquid level sensor (6) and adjust the opening of the control valve group (8).

4. The refrigerant transfer device in a refrigeration system according to claim 3, characterized in that: The controller (7) is a visual controller (7).

5. The refrigerant transfer device in a refrigeration system according to claim 4, characterized in that: The controller (7) is provided with a remote transmission port.

6. The refrigerant transfer device in a refrigeration system according to claim 3, characterized in that: The control valve group (8), the liquid level sensor (6) and the controller (7) are an explosion-proof control valve group, an explosion-proof liquid level sensor and an explosion-proof controller.

7. The refrigerant transfer device in a refrigeration system according to claim 2, characterized in that: The control valve group (8) adopts one of a combination of a solenoid valve and a manual throttle valve, a combination of a solenoid valve and an electric valve, and a combination of a solenoid valve and a pneumatic regulating valve.

8. The refrigerant transfer device in a refrigeration system according to claim 1, characterized in that: The liquid level sensor (6) adopts an analog signal sensor or a switching signal liquid level switch.

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