Centralized cooling supply and household metering device suitable for evaporative refrigeration system

Abstract

The utility model discloses a centralized cold supply household metering device suitable for evaporative refrigeration system, the centralized cold supply household metering device is integrated in refrigeration working medium liquid supply circulating system, and refrigeration working medium liquid supply circulating system is connected with refrigeration working medium circulating barrel, refrigeration working medium liquid supply circulating system includes liquid supply main pipeline, and the refrigeration working medium liquid supply outlet of refrigeration working medium circulating pump is communicated with refrigeration working medium circulating barrel through liquid supply main pipeline, and the centralized cold supply household metering device is guided through the gas-liquid separator respectively after the gas-liquid two -phase refrigerant of user end evaporator refrigeration, and the gas phase refrigerant of gas-liquid two -phase refrigerant is guided to the gas phase refrigerant pipeline, and the liquid phase refrigerant is guided to the liquid phase refrigerant pipeline, and the flowmeter is arranged on the liquid phase refrigerant pipeline, the device of the utility model can be more reasonable and accurately provide energy consumption basis for the user, avoids the various malpractices of traditional basis area measurement, and belongs to an energy -conserving device.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration system technology, and in particular to a centralized cooling metering device suitable for evaporative refrigeration systems. Background Technology

[0002] In 2024, logistics companies were affected by the market, and cold storage rental prices showed a downward trend, which greatly impacted their revenue. In order to better meet the needs of cold storage lessees in the market and improve the market competitiveness of existing cold storage facilities, it is necessary to accurately measure the cooling needs of cold storage users. Currently, the cold storage market is highly competitive, with fewer customers leasing entire units. Cold storage facilities in large agricultural wholesale markets and logistics parks typically use centralized cooling systems. Centralized cooling is more energy-efficient, environmentally friendly, and cost-effective compared to decentralized systems with individual units per warehouse. Currently, the common tenant billing method involves allocating total electricity costs proportionally based on the leased area. However, this method has the following drawbacks: Each cold storage customer has different usage habits, different types of goods stored, different entry and exit temperatures, and different door opening and closing frequencies, all of which significantly affect the final electricity consumption. Therefore, simply allocating electricity fees based on the proportion of leased area is unreasonable. It will increase the additional burden on some tenants, affect their incentive to save energy, and lead to inefficient operation of the refrigeration system and energy waste. Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a centralized cooling metering device suitable for evaporative refrigeration systems. Summary of the Invention

[0003] The purpose of this invention is to provide a centralized cooling metering device suitable for evaporative refrigeration systems. 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. To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a centralized cooling metering device for individual households in an evaporative refrigeration system. The centralized cooling metering device is integrated into the refrigerant supply circulation system, and the refrigerant supply circulation system is connected to the refrigerant circulation tank. The refrigerant supply circulation system includes a main supply pipeline, which is connected to the refrigerant supply outlet of the refrigerant circulation tank via a refrigerant circulation pump. The centralized cooling metering device draws gas and liquid refrigerant after cooling by the evaporator at the user end through a gas-liquid separator, and draws the gas phase refrigerant to the gas phase refrigerant pipeline and the liquid phase refrigerant to the liquid phase refrigerant pipeline. A flow meter is installed on the liquid refrigerant pipeline. 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. 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 centralized cooling individual metering device. Furthermore, the refrigerant supply branch line is divided into a user-end refrigerant inlet line and a user-end refrigerant outlet line; A first flow meter is installed on the refrigerant inlet pipeline at the user end; The user-end refrigerant discharge pipeline is divided into a gas phase refrigerant pipeline and a liquid phase refrigerant pipeline. The liquid phase refrigerant pipeline is provided with a U-shaped liquid trap near the liquid phase refrigerant outlet of the gas-liquid separator, and a second flow meter is installed at the liquid trap. Furthermore, the centralized cooling individual metering device is suitable for refrigeration systems in high and low temperature cold storage facilities, cold processing rooms, or ice and snow venues. Furthermore, the refrigerant of the refrigeration system is ammonia, Freon, or carbon dioxide. Furthermore, both the first flow meter and the second flow meter are selected from Coriolis mass flow meters, turbine flow meters, ultrasonic flow meters, or volumetric flow meters. Furthermore, the gas-liquid separator is either a vertical gas-liquid separator or a horizontal gas-liquid separator. Furthermore, the gas-liquid separator has a gas-liquid two-phase refrigerant centrifugal separation pipeline for receiving gas-liquid two-phase refrigerant, a gas phase refrigerant pipeline for conveying gas phase refrigerant, and a liquid phase refrigerant pipeline for conveying liquid phase refrigerant. In the above technical solution, the centralized cooling metering device for individual households in an evaporative refrigeration system provided by this utility model has the following beneficial effects: The device of this utility model can provide users with a more reasonable and accurate basis for energy consumption, avoiding the various drawbacks of traditional measurement based on the area of ​​use, and belongs to an energy-saving device. Attached Figure Description

[0004] 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. Figure 1 A system flow diagram of a centralized cooling metering device for evaporative refrigeration systems provided in this embodiment of the present invention; Figure 2 A cross-sectional view of a gas-liquid separator for a centralized cooling metering device suitable for an evaporative refrigeration system, provided in an embodiment of this utility model; Figure 3 A front view of a gas-liquid separator for a centralized cooling metering device suitable for evaporative refrigeration systems, provided as an embodiment of this utility model. Explanation of reference numerals in the attached figures: 1. Refrigerant circulation tank; 101. Refrigerant circulation pump; 201. Liquid refrigerant main pipeline; 202. User-end refrigerant inlet pipeline; 203. Gas phase refrigerant pipeline; 204. Liquid phase refrigerant pipeline; 205. Water trap; 301. First flow meter; 302. Second flow meter; 4. Gas-liquid separator 401. Centrifugal separation pipeline for gas-liquid two-phase refrigerant. Detailed Implementation

[0005] 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. See Figures 1 to 3 As shown; This embodiment provides a centralized cooling metering device for individual households applicable to evaporative refrigeration systems. The centralized cooling metering device is integrated into the refrigerant supply circulation system, and the refrigerant supply circulation system is connected to the refrigerant 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 circulation tank 1 via a refrigerant circulation pump 101. The centralized cooling metering device draws gas and liquid refrigerant after cooling by the evaporator at the user end through the gas-liquid separator 4. The gas phase refrigerant is drawn to the gas phase refrigerant pipeline 203, while the liquid phase refrigerant is drawn to the liquid phase refrigerant pipeline 204. A flow meter is installed on the liquid phase refrigerant pipeline 204. Specifically, this embodiment discloses a centralized cooling metering device suitable for evaporative refrigeration systems, which includes a gas-liquid separator 4 installed in the liquid supply branch line. The gas-liquid separator 4 separates the gas-liquid two-phase refrigerant in the liquid supply branch line into a gas phase refrigerant and a liquid phase refrigerant. The gas phase refrigerant is returned to the refrigerant circulation tank 1 through the gas phase refrigerant pipeline 203, while the liquid phase refrigerant is returned to the refrigerant circulation tank 1 through the liquid phase refrigerant pipeline 204. In this embodiment, the flow rate of the liquid phase refrigerant in the liquid phase refrigerant pipeline 204 is measured in real time by a flow meter. This embodiment also includes a calculation analyzer connected to the flow collector. At the same time, the flow meter of each branch transmits the collected flow data to the flow collector, and finally to the calculation analyzer for calculation and storage. See Figure 1 As shown, in the 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. Each liquid supply branch line corresponds to one user terminal, and each liquid supply branch line is integrated with a centralized cooling individual metering device. 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; A first flow meter 301 is installed on the refrigerant inlet pipe 202 at the user end. The first flow meter 301 is used to measure the flow rate of the gas-liquid two-phase refrigerant in real time and transmit it to the flow acquisition device. The user-end refrigerant discharge pipeline is divided into a gas phase refrigerant pipeline 203 and a liquid phase refrigerant pipeline 204. A U-shaped liquid trap 205 is provided in the liquid phase refrigerant pipeline 204 near the liquid phase refrigerant outlet of the gas-liquid separator 4. A second flow meter 302 is installed at the liquid trap 205. The second flow meter 302 is used to measure the flow rate of the liquid phase refrigerant in the liquid phase refrigerant pipeline 204 in real time and transmit it to the flow acquisition device. Preferably, the centralized cooling individual metering device of this embodiment is suitable for the refrigeration system of high and low temperature cold storage for goods storage, the refrigeration system of cold processing room, or the refrigeration system of ice and snow venue. Preferably, the refrigerant in the refrigeration system of this embodiment is ammonia, Freon, or carbon dioxide. Preferably, in this embodiment, both the first flow meter 301 and the second flow meter 302 are Coriolis mass flow meters, turbine flow meters, ultrasonic flow meters, or volumetric flow meters. Preferably, the gas-liquid separator 4 in this embodiment is a vertical gas-liquid separator or a horizontal gas-liquid separator. See Figure 2 and Figure 3 As shown, the gas-liquid separator 4 of this embodiment has a gas-liquid two-phase refrigerant centrifugal separation pipeline 401 for receiving gas-liquid two-phase refrigerant, a gas phase refrigerant pipeline 203 for conveying gas phase refrigerant, and a liquid phase refrigerant pipeline 204 for conveying liquid phase refrigerant. See Figure 1As shown, the refrigerant circulation tank 1 delivers the refrigerant to the user end. The first flow meter 301 of user A records the instantaneous total flow rate m1 of the refrigerant provided by user A, and the first flow meter 301 of user 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 enters the gas-liquid separator 4 in a two-phase state, and the gas-liquid and liquid phases are separated. The liquid refrigerant flows from the bottom of the gas-liquid separator 4 to the refrigerant circulation tank 1 by gravity through the liquid refrigerant pipeline 204, and the gas refrigerant flows from the top of the gas-liquid separator 4 to the refrigerant circulation tank 1 through the gas refrigerant pipeline 203 by pressure difference. The second flow meter 302 of user A records the flow rate m3 of the pure liquid refrigerant discharged after passing through the evaporator of user A, and the second flow meter 302 of user B records the flow rate m4 of the pure liquid refrigerant discharged after passing through the evaporator of user B. Combining the data acquisition from the aforementioned calculation analyzer, flow acquisition device, and corresponding flow meter, this embodiment uses the flow acquisition device and calculation analyzer to measure the user's cooling capacity usage using the flow difference of the liquid refrigerant: i.e., Δm. A =m1-m3, Δm B =m2-m4; Further, the user's energy consumption is measured by the percentage of the difference in flow rate; That is, when the total power consumption of the refrigeration system is Q: User A's power consumption is: User B's power consumption is: The water trap design of the liquid refrigerant pipeline in the gas-liquid separator 4 involved in this embodiment can improve the data collection accuracy of the second flow meter 302. In the above technical solution, the centralized cooling metering device for individual households in an evaporative refrigeration system provided by this utility model has the following beneficial effects: The device of this utility model can provide users with a more reasonable and accurate basis for energy consumption, avoiding the various drawbacks of traditional measurement based on the area of ​​use, and belongs to an energy-saving device. 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 centralized cooling metering device suitable for evaporative refrigeration systems, characterized in that, The centralized cooling metering device is integrated into the refrigerant supply circulation system, and the refrigerant supply circulation system is connected to the refrigerant 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 circulation tank (1) via a refrigerant circulation pump (101). The centralized cooling metering device draws gas and liquid refrigerant after cooling by the evaporator at the user end through the gas-liquid separator (4), and draws the gas phase refrigerant to the gas phase refrigerant pipeline (203) and the liquid phase refrigerant to the liquid phase refrigerant pipeline (204). A flow meter is installed on the liquid refrigerant pipeline (204).

2. The centralized cooling metering device for individual households in an evaporative 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 centralized cooling individual metering device.

3. The centralized cooling metering device for individual households in an evaporative 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 first flow meter (301) is installed on the user-end refrigerant inlet pipeline (202); The user-end refrigerant discharge pipeline is divided into the gas phase refrigerant pipeline (203) and the liquid phase refrigerant pipeline (204). The liquid phase refrigerant pipeline is provided with a U-shaped liquid trap near the liquid phase refrigerant outlet of the gas-liquid separator, and a second flow meter is provided at the liquid trap.

4. The centralized cooling metering device for individual households in an evaporative refrigeration system according to any one of claims 1 to 3, characterized in that, The centralized cooling individual metering device is suitable for the refrigeration system of high and low temperature cold storage for goods storage, the refrigeration system of cold processing room, or the refrigeration system of ice and snow venue.

5. The centralized cooling metering device for individual households in an evaporative refrigeration system according to claim 4, characterized in that, The refrigerant in the refrigeration system is ammonia, Freon, or carbon dioxide.

6. The centralized cooling metering device for individual households in an evaporative refrigeration system according to claim 3, characterized in that, Both the first flow meter (301) and the second flow meter (302) are selected from Coriolis mass flow meters, turbine flow meters, ultrasonic flow meters, or volumetric flow meters.

7. A centralized cooling metering device for individual households in an evaporative refrigeration system according to any one of claims 1 to 3, characterized in that, The gas-liquid separator (4) is a vertical gas-liquid separator or a horizontal gas-liquid separator.

8. The centralized cooling metering device for individual households in an evaporative refrigeration system according to claim 7, characterized in that, The gas-liquid separator (4) has a gas-liquid two-phase refrigerant centrifugal separation line (401) for receiving gas-liquid two-phase refrigerant, a gas phase refrigerant line (203) for conveying gas phase refrigerant, and a liquid phase refrigerant line (204) for conveying liquid phase refrigerant.

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