A refrigeration capacity distribution metering device for a barrel pump liquid supply refrigeration system

Abstract

The utility model discloses a cold quantity distribution metering device suitable for barrel pump liquid supply refrigerating system, and the cold quantity distribution metering device is through refrigeration working medium sampling pipe and is respectively drained after the gas -liquid two -phase refrigeration working medium of user end evaporator refrigeration, and the cold quantity distribution metering device still includes the overheating device for heating liquid phase refrigeration working medium, the gas phase refrigeration working medium of the refrigeration working medium sampling pipe drainage and the liquid phase refrigeration working medium heated through the overheating device form the saturated gas phase refrigeration working medium and all backflow to the refrigeration working medium liquid supply circulating barrel. The device of the utility model gathers and calculates the proportional relationship of user end refrigeration working medium liquid supply amount and electric heating power, and the user cold quantity use condition is measured. The device can reasonably and accurately provide the energy consumption basis for user end, avoids various drawbacks brought by the traditional measurement according to the use area, and belongs to an energy-saving device.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration system technology, and in particular to a cooling capacity distribution and metering device suitable for a barrel pump liquid supply refrigeration system. Background Technology

[0002] Cold storage facilities in large agricultural wholesale markets and refrigeration systems in agricultural cold processing equipment typically employ centralized cooling. However, this makes it difficult for tenants to measure their energy consumption. To better meet the needs of cold storage tenants and enhance the market competitiveness of existing cold storage facilities, it is necessary to accurately measure the cooling needs of cold storage users.

[0003] Currently, the common billing method for tenants is to allocate the total electricity cost proportionally based on the leased area. However, this method has the following drawbacks:

[0004] Each cold storage customer has different usage habits, storage types, inbound and outbound temperatures and quantities, and door opening and closing frequency, all of which significantly impact the final cooling capacity quota. Therefore, simply calculating user cooling capacity usage based on the proportion of leased area is unreasonable, as it increases the burden on some tenants, discourages them from saving energy, and leads to inefficient operation of the refrigeration system and energy waste.

[0005] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a cooling capacity distribution and metering device suitable for barrel pump liquid supply refrigeration systems. Utility Model Content

[0006] The purpose of this invention is to provide a cooling capacity distribution and metering device suitable for a barrel pump-supply refrigeration system. This device can perform reasonable and accurate billing and metering based on the user's actual cooling usage, thereby achieving the goal of energy saving and carbon reduction.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model provides a cooling capacity distribution and metering device suitable for a barrel pump-supply refrigeration system. The cooling capacity distribution and metering device is integrated into the refrigerant supply circulation system, and the refrigerant supply circulation system is connected to the refrigerant supply circulation barrel.

[0009] The refrigerant supply circulation system includes a main supply pipeline, which is connected to the refrigerant supply outlet of the refrigerant supply circulation tank via a refrigerant circulation pump.

[0010] The cold energy distribution and metering device draws gas and liquid two-phase refrigerant after it has been cooled by the evaporator at the user end through a refrigerant sampling tube, and the cold energy distribution and metering device also includes a superheating device for heating the liquid phase refrigerant.

[0011] The gaseous refrigerant drawn through the refrigerant sampling tube and the saturated gaseous refrigerant formed by the liquid refrigerant heated by the superheater are both returned to the refrigerant supply circulation tank.

[0012] Furthermore, multiple liquid supply branch lines are connected to the main liquid supply line, and these multiple liquid supply branch lines are connected in parallel.

[0013] Each of the aforementioned liquid supply branch lines corresponds to one user terminal, and each of the aforementioned liquid supply branch lines is integrated with the aforementioned cold energy distribution and metering device.

[0014] Furthermore, the refrigerant supply branch line is divided into a user-end refrigerant inlet line and a user-end refrigerant outlet line;

[0015] A refrigerant flow meter is installed on the refrigerant inlet pipeline at the user end.

[0016] The user-end refrigerant discharge pipeline is divided into a gas phase refrigerant pipeline and a liquid phase refrigerant pipeline. The gas phase refrigerant pipeline and the liquid phase refrigerant pipeline are connected through the refrigerant sampling pipe, and the gas and liquid phase refrigerants processed by the user-end evaporator are diverted through the refrigerant sampling pipe.

[0017] The gaseous refrigerant enters the gaseous refrigerant pipeline;

[0018] The liquid refrigerant is guided into the liquid refrigerant pipeline through the refrigerant sampling tube.

[0019] Furthermore, the superheating device is installed on the liquid refrigerant pipeline, and a refrigerant dryness meter is also provided.

[0020] The refrigerant dryness meter is used to detect the dryness value of the refrigerant in order to adjust the power of the superheating device.

[0021] Furthermore, the cold energy distribution and metering device is suitable for refrigeration systems in high and low temperature cold storage facilities for goods storage or centralized refrigeration systems in agricultural product cold processing equipment.

[0022] Furthermore, the refrigerant of the refrigeration system is ammonia, Freon, or carbon dioxide.

[0023] Furthermore, the refrigerant flow meter is selected from Coriolis mass flow meters, turbine flow meters, ultrasonic flow meters, or volumetric flow meters.

[0024] Furthermore, the overheating device is selected as a wound electric heater or a jacketed electric heater.

[0025] Furthermore, the refrigerant sampling tube includes a gas-liquid two-phase refrigerant expansion pipe and a sampling pipe connected thereto.

[0026] In the above technical solution, the present invention provides a cooling capacity distribution and metering device suitable for a barrel pump liquid supply refrigeration system, which has the following beneficial effects:

[0027] This invention relates to a device that measures a user's cooling capacity by collecting and calculating the ratio of refrigerant supply to electric heating power. This device provides users with accurate and reasonable data on energy consumption, avoiding the drawbacks of traditional methods that rely on usage area. Therefore, it is an energy-saving device. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0029] Figure 1 A system flow diagram of a cooling capacity distribution and metering device for a barrel pump-supply refrigeration system provided in this embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the refrigerant sampling tube of the cooling capacity distribution metering device for a barrel pump-fed refrigeration system provided in this embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Refrigerant supply circulation tank;

[0033] 101. Refrigerant circulation pump;

[0034] 201. Liquid refrigerant main pipeline; 202. User-end refrigerant inlet pipeline; 203. Gas phase refrigerant pipeline; 204. Liquid phase refrigerant pipeline;

[0035] 3. Refrigerant flow meter; 4. Refrigerant sampling tube; 5. Superheating device; 6. Refrigerant dryness meter;

[0036] 401. Gas-liquid two-phase refrigerant expansion pipeline; 402. Sampling pipeline. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0038] See Figures 1 to 2 As shown;

[0039] This embodiment provides a cooling capacity distribution and metering device suitable for a barrel pump-fed refrigeration system. The cooling capacity distribution and metering device is integrated into the refrigerant supply circulation system, and the refrigerant supply circulation system is connected to the refrigerant supply circulation barrel 1.

[0040] The refrigerant supply circulation system includes a main supply pipeline 201, which is connected to the refrigerant supply outlet of the refrigerant supply circulation tank 1 via a refrigerant circulation pump 101.

[0041] The cold energy distribution and metering device draws gas and liquid two-phase refrigerant after cooling by the evaporator at the user end through the refrigerant sampling tube 4, and the cold energy distribution and metering device also includes a superheating device 5 for heating the liquid phase refrigerant.

[0042] The gaseous refrigerant drawn through the refrigerant sampling tube 4 and the saturated gaseous refrigerant formed by the liquid refrigerant heated by the superheating device 5 are both returned to the refrigerant supply circulation tank 1.

[0043] Specifically, this embodiment discloses a cooling capacity distribution and metering device. Simultaneously, the refrigerant supply circulation tank 1 delivers refrigerant to the supply pipeline and then to the user end via the refrigerant circulation pump 101. The user end of this embodiment is equipped with the cooling capacity distribution and metering device of this embodiment. The cooling capacity distribution and metering device of this embodiment diverts the gas-liquid two-phase refrigerant after cooling by the user end evaporator through the refrigerant sampling tube 4, separating the gas phase refrigerant and the liquid phase refrigerant. The liquid phase refrigerant is heated by a superheating device to form a saturated gas phase refrigerant. The device of this embodiment measures the user's cooling capacity usage by collecting and calculating the ratio of the refrigerant supply volume to the electric heating power at the user end.

[0044] See Figure 1 As shown, preferably, in the refrigeration system of this embodiment, multiple liquid supply branch lines are connected to the main liquid supply line 201, and the multiple liquid supply branch lines are connected in parallel; wherein, each liquid supply branch line corresponds to a user end, and each liquid supply branch line integrates a cooling capacity distribution and metering device.

[0045] In this embodiment, the refrigerant flow meter is selected from Coriolis mass flow meters, turbine flow meters, ultrasonic flow meters, or volumetric flow meters.

[0046] Preferably, in this embodiment, the refrigerant supply branch line is divided into a user-end refrigerant inlet line 202 and a user-end refrigerant outlet line;

[0047] A refrigerant flow meter 3 is installed on the refrigerant inlet pipe 20 at the user end;

[0048] The user-end refrigerant discharge pipeline is divided into a gas phase refrigerant pipeline 203 and a liquid phase refrigerant pipeline 204. The gas phase refrigerant pipeline 203 and the liquid phase refrigerant pipeline 204 are connected by a refrigerant sampling pipe 4, and the gas and liquid phase refrigerants processed by the user-end evaporator are diverted through the refrigerant sampling pipe 4 respectively.

[0049] Gas-phase refrigerant enters gas-phase refrigerant line 203;

[0050] The liquid refrigerant is guided into the liquid refrigerant pipeline 204 through the refrigerant sampling tube 4.

[0051] See Figure 2 As shown, since the gaseous and liquid refrigerant need to be separated through the refrigerant sampling tube 4, the refrigerant sampling tube 4 in this embodiment includes a gas-liquid two-phase refrigerant expansion pipe 401 and a sampling pipe 402 connected thereto. Preferably, the refrigerant sampling tube 4 in this embodiment has an axially slotted design, with the gaseous refrigerant flowing out from the opening at the top of the sampling tube, and the liquid refrigerant flowing towards the superheating device 5 by gravity.

[0052] As a preferred embodiment, the sampling pipe 402 of the refrigerant sampling pipe 4 in this embodiment can adopt a U-shaped bend structure, which can effectively prevent the gaseous working fluid from entering this pipe, improve the sampling accuracy of each refrigerant dryness meter, and thus accurately control the heating power of the superheating device 5.

[0053] Preferably, in this embodiment, the liquid refrigerant pipeline 204 is provided with a superheating device 5 and equipped with a refrigerant dryness meter 6; wherein, the refrigerant dryness meter 6 is used to detect the dryness value of the refrigerant in order to adjust the power of the superheating device 5.

[0054] Preferably, the cold energy distribution and metering device of this embodiment is suitable for the refrigeration system of high and low temperature cold storage for goods or the centralized refrigeration system of agricultural product cold processing equipment.

[0055] Preferably, the refrigerant in the refrigeration system of this embodiment is ammonia, Freon, or carbon dioxide.

[0056] Preferably, the overheating device 5 in this embodiment is a wound electric heater or a jacketed electric heater.

[0057] See Figure 1As shown, this embodiment uses two supply branch lines to supply liquid to two user ends (i.e., user A and user B in the figure) for further explanation and illustration. The refrigerant in the refrigerant supply circulation tank is transported to the main supply pipeline by the refrigerant circulation pump and enters the supply branch lines respectively. Flow meter A records the instantaneous total flow rate m1 of the refrigerant provided by user A, and flow meter B records the instantaneous total flow rate m2 of the refrigerant provided by user B. After being cooled by the evaporator at the user end, the refrigerant is in a two-phase state of gas and liquid and flows through the refrigerant sampling pipe 4 to complete the gas-liquid separation. The liquid phase refrigerant flows through the heating device 5 and is heated and evaporated into a saturated gas phase state and flows back to the refrigerant supply circulation tank 1. The refrigerant dryness meter 6 adjusts the electric heating power by detecting the saturation degree of the heated refrigerant. The gas phase refrigerant flows from the top of the refrigerant sampling pipe 4 to the refrigerant supply circulation tank 1 through the gas phase refrigerant pipeline due to the pressure difference.

[0058] The corresponding superheating device 5 is used to record the power W1 and W2 of the pure liquid working fluid discharged after the user's evaporator being heated.

[0059] Using a flow meter and a calculation analyzer, the total cooling capacity of the refrigeration system compressor is Q. Further, by measuring the ratio of flow rate m to electric heating power W, the cooling capacity allocation for user A is determined.

[0060]

[0061] Where: m1 is the flow rate of the refrigerant of user A; W1 is the electric heating power of the superheater of user A;

[0062] Similarly, user B's cooling demand is:

[0063]

[0064] In the formula: m2 is the flow rate of the refrigerant of user B; W2 is the electric heating power of the superheater of user B.

[0065] The device in this embodiment further explains the distribution of cooling capacity to users by ignoring factors such as friction loss. Theoretically, it is assumed that the refrigerant flow rates m1 and m2 supplied to users A and B are equal. If the heating power W1 of the refrigerant heating device of user A is larger, then user A will actually use less cooling capacity, and vice versa.

[0066] In the above technical solution, the present invention provides a cooling capacity distribution and metering device suitable for a barrel pump liquid supply refrigeration system, which has the following beneficial effects:

[0067] This invention relates to a device that measures a user's cooling capacity by collecting and calculating the ratio of refrigerant supply to electric heating power. This device provides users with accurate and reasonable data on energy consumption, avoiding the drawbacks of traditional methods that rely on usage area. Therefore, it is an energy-saving device.

[0068] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cooling capacity distribution and metering device suitable for a tank pump-fed refrigeration system, characterized in that, The cold energy distribution and metering device is integrated into the refrigerant supply circulation system, and the refrigerant supply circulation system is connected to the refrigerant supply circulation tank (1). The refrigerant supply circulation system includes a main supply pipeline (201), which is connected to the refrigerant supply outlet of the refrigerant supply circulation tank (1) via a refrigerant circulation pump (101). The cold energy distribution and metering device draws gas and liquid two-phase refrigerant after being cooled by the user-end evaporator through the refrigerant sampling tube (4), and the cold energy distribution and metering device also includes a superheating device (5) for heating the liquid phase refrigerant. The gaseous refrigerant drawn through the refrigerant sampling tube (4) and the saturated gaseous refrigerant formed by the liquid refrigerant heated by the superheating device (5) are both returned to the refrigerant supply circulation tank (1).

2. The cooling capacity distribution and metering device for a tank pump-fed refrigeration system according to claim 1, characterized in that, Multiple liquid supply branch lines are connected to the main liquid supply line (201), and the multiple liquid supply branch lines are connected in parallel to each other; Each of the aforementioned liquid supply branch lines corresponds to one user terminal, and each of the aforementioned liquid supply branch lines is integrated with the aforementioned cold energy distribution and metering device.

3. The cooling capacity distribution and metering device for a tank pump-fed refrigeration system according to claim 2, characterized in that, The liquid supply branch line is divided into a user-end refrigerant inlet line (202) and a user-end refrigerant outlet line; A refrigerant flow meter (3) is installed on the refrigerant inlet pipeline (202) at the user end; The user-end refrigerant discharge pipeline is divided into a gas phase refrigerant pipeline (203) and a liquid phase refrigerant pipeline (204). The gas phase refrigerant pipeline (203) and the liquid phase refrigerant pipeline (204) are connected through the refrigerant sampling pipe (4) and the gas and liquid phase refrigerants processed by the user-end evaporator are diverted through the refrigerant sampling pipe (4). The gaseous refrigerant enters the gaseous refrigerant line (203); The liquid refrigerant is guided into the liquid refrigerant pipeline (204) through the refrigerant sampling tube (4).

4. The cooling capacity distribution and metering device for a tank pump-fed refrigeration system according to claim 3, characterized in that, The superheating device (5) is installed on the liquid refrigerant pipeline (204), and a refrigerant dryness meter (6) is also provided. The refrigerant dryness meter (6) is used to detect the dryness value of the refrigerant in order to adjust the power of the superheating device (5).

5. The cooling capacity distribution and metering device for a tank pump-fed refrigeration system according to any one of claims 1 to 4, characterized in that, The cold energy distribution and metering device is suitable for refrigeration systems in high and low temperature cold storage facilities for goods storage or centralized refrigeration systems in agricultural product cold processing equipment.

6. The cooling capacity distribution and metering device for a tank pump-supply refrigeration system according to claim 5, characterized in that, The refrigerant in the refrigeration system is ammonia, Freon, or carbon dioxide.

7. The cooling capacity distribution and metering device for a tank pump-fed refrigeration system according to claim 3, characterized in that, The refrigerant flow meter (3) is selected from Coriolis mass flow meters, turbine flow meters, ultrasonic flow meters, or volumetric flow meters.

8. The cooling capacity distribution and metering device for a tank pump-fed refrigeration system according to claim 1, characterized in that, The overheating device (5) is selected as a wound electric heater or a jacketed electric heater.

9. The cooling capacity distribution and metering device for a tank pump-fed refrigeration system according to any one of claims 1 to 4, characterized in that, The refrigerant sampling tube (4) includes a gas-liquid two-phase refrigerant expansion pipe (401) and a sampling pipe (402) connected thereto.

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