Centralized control system of refrigerating and freezing cabinet for supermarkets and supermarkets

Abstract

The utility model provides a centralized control system of refrigerating and freezing cabinets for supermarkets and supermarkets, which comprises a controller, sub-control units, operation modules and monitoring modules, the sub-control units, the operation modules and the monitoring modules are arranged in all cabinets, the monitoring modules are connected with the controller, and the controller controls the operation modules through the sub-control units. According to the utility model, the compressor and the condenser are arranged in each cabinet, so that the occupied space is reduced, the inlet and the outlet of the condenser are detachably connected with an external pipeline, and the convenience of moving the cabinet is improved; the collecting assembly and the adjusting assembly are directly connected with the controller, so that the sub-control unit rapidly adjusts the rotating speed of the compressor and the opening degree of the electronic expansion valve under the guidance of the controller, and the purposes of energy saving and high energy efficiency are achieved.

Description

Technical Field

[0001] This utility model relates to the field of compressor testing, and in particular to a centralized control system for supermarket refrigerated and frozen cabinets. Background Technology

[0002] Supermarket refrigerated and frozen cabinets are mainly used for storing and displaying products such as fish, meat, fruits, vegetables and beverages. Currently, supermarket refrigeration equipment is generally based on remote-mounted and self-contained units.

[0003] Typically, the compressor and condenser of a remote-mounted unit are installed outdoors or in a separate room away from the display case. This allows the unit to be located away from the display area, which not only allows for flexible placement according to site conditions and is not limited by the location of the display case, but also reduces the impact of noise and heat on the display environment. However, remote-mounted units are usually equipped with long connecting pipes to accommodate different installation distances, which not only takes up a large area but also results in a large refrigerant charge. Furthermore, when the terminal cabinet needs to be moved, the pipes must be cut, making the installation process complex.

[0004] The compressor and condenser of the self-contained unit are integrated inside the cabinet or at the bottom, making the whole unit more compact and easier to move and install. However, it usually uses a fixed-speed compressor, fixed-speed fan and thermal expansion valve (or capillary tube) control method, which causes large temperature fluctuations in the refrigerator and high energy consumption. It cannot cool down quickly under high load. Summary of the Invention

[0005] To address the aforementioned problems, this utility model proposes a centralized control system for refrigerated and frozen cabinets used in supermarkets and shopping malls.

[0006] The main contents of this utility model include:

[0007] A centralized control system for supermarket refrigerated and frozen display cases includes a control module, an operation module, a communication module, and a monitoring module. The control module includes a controller and sub-control units installed in each cabinet. The operation module includes a compressor, a condenser, and an evaporator installed in each cabinet. The monitoring module includes a data acquisition component and an adjustment component installed in each cabinet. The controller communicates with the sub-control units and the data acquisition component via the communication module. The data acquisition component, the adjustment component, and the compressor are connected to the sub-control units. The inlet and outlet of the condenser are detachably connected to external cooling pipes.

[0008] Preferably, the acquisition component includes temperature sensors and pressure sensors installed at the inlet and / or outlet of each compressor and condenser; the adjustment component includes an electronic expansion valve unit installed at the condenser outlet.

[0009] Preferably, the sub-control unit includes a frequency converter and an electronic expansion valve controller, the frequency converter being connected to the compressor and the electronic expansion valve controller being connected to the electronic expansion valve unit.

[0010] Preferably, the electronic expansion valve unit includes a main valve and a liquid injection valve.

[0011] Preferably, the compressor is a horizontal variable frequency compressor.

[0012] Preferably, the condenser is a water-cooled condenser, and a water valve is provided between the inlet and outlet of the condenser and the external pipe, and the water valve is connected to the controller.

[0013] Preferably, the monitoring module further includes an environmental monitoring component, which is deployed in the area where each cabinet is located and connected to the controller. The environmental monitoring component includes an environmental temperature sensor and an environmental humidity sensor.

[0014] The beneficial effects of this utility model are as follows: This utility model proposes a centralized control system for supermarket refrigerated and frozen cabinets, which arranges the compressor and condenser in each cabinet, reducing the space occupied. The inlet and outlet of the condenser are detachably connected to the external pipes, improving the convenience of moving the cabinets. The data acquisition component is directly connected to the controller, so that the sub-control unit can quickly adjust the compressor speed and the opening of the electronic expansion valve under the guidance of the controller, achieving the purpose of energy saving and high energy efficiency. Attached Figure Description

[0015] Figure 1 This is a structural block diagram of the present invention. Detailed Implementation

[0016] The technical solution protected by this utility model will be described in detail below with reference to the accompanying drawings.

[0017] Please refer to Figure 1 Supermarket refrigerated and frozen display cases typically have multiple independent cabinets. This invention proposes a centralized control system for supermarket refrigerated and frozen display cases, comprising a control module, an operation module, a communication module, and a monitoring module. The control module includes a controller and sub-control units located within each cabinet. Based on the operating status of each cabinet and the external environmental conditions collected by the monitoring module, the controller performs overall control of the refrigeration and freezing units in all cabinets through the corresponding sub-control units, including adjusting the speed of the corresponding compressor and the opening degree of the corresponding electronic expansion valve.

[0018] Specifically, the monitoring module is used to acquire operating data of each cabinet and parameters of the external environment, such as temperature and pressure data of the compressor inlet and outlet, and temperature data of the condenser inlet and outlet. The monitoring module includes a data acquisition component, an adjustment component, and an environmental monitoring component deployed in the cabinet area. In this embodiment, the data acquisition component includes temperature sensors and pressure sensors deployed at the inlet and / or outlet of each compressor and condenser. The environmental monitoring component includes an ambient temperature sensor and an ambient humidity sensor.

[0019] In this embodiment, the regulating component includes an electronic expansion valve unit located at the condenser outlet. That is, this invention uses an electronic expansion valve instead of a thermostatic expansion valve. Under the overall control of the controller, the opening degree is precisely controlled by the corresponding electronic expansion valve controller, resulting in small temperature fluctuations within the cabinet and reducing energy consumption to a certain extent. The regulating component and the acquisition component are directly connected to the controller, enabling the controller to quickly transmit the corresponding control strategy to the corresponding sub-control unit, so that it can make a corresponding response.

[0020] Furthermore, the sub-control unit includes a frequency converter and an electronic expansion valve controller. The frequency converter is connected to the compressor, and the electronic expansion valve controller is connected to the electronic expansion valve unit. For better adjustment of the corresponding cabinet, the electronic expansion valve unit includes a main valve and a liquid injection valve. The compressor is a horizontal variable frequency compressor.

[0021] Furthermore, the sub-control unit communicates with the controller via wired or wireless means. Similarly, the acquisition component and the adjustment component also communicate with the controller via wired or wireless means. For example, the communication module can be a network card, a WiFi module, or a 4G / 5G module.

[0022] In other embodiments, the condenser is a water-cooled condenser, and a water valve is provided between the inlet and outlet of the condenser and the external pipe. The water valve is connected to the controller, that is, the controller can directly adjust the opening of the water valve. The inlet and outlet of the cooling water of the condenser are connected to the external pipe in a detachable manner. When it is necessary to move the corresponding cabinet, the water valve is closed and the pipe is disassembled to achieve convenient movement without worrying about leakage of the internal refrigerant.

[0023] The integrated control system proposed in this utility model not only occupies a small area and provides precise control over refrigeration, but also achieves energy saving and high energy efficiency.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A centralized control system for supermarket refrigerated and frozen display cases, characterized in that, It includes a control module, an operation module, a communication module, and a monitoring module; the control module includes a controller and sub-control units installed in each cabinet; the operation module includes a compressor, a condenser, and an evaporator installed in each cabinet; the monitoring module includes a data acquisition component and an adjustment component deployed in the cabinet; the controller communicates with the sub-control units and the data acquisition component through the communication module; the data acquisition component, the adjustment component, and the compressor are connected to the sub-control units; the inlet and outlet of the condenser are detachably connected to external cooling pipes.

2. The centralized control system for a supermarket refrigerated and frozen display case according to claim 1, characterized in that, The acquisition components include temperature sensors and pressure sensors installed at the inlets and / or outlets of each compressor and condenser; the regulation components include an electronic expansion valve unit installed at the condenser outlet.

3. The centralized control system for a supermarket refrigerated and frozen display case according to claim 2, characterized in that, The sub-control unit includes a frequency converter and an electronic expansion valve controller. The frequency converter is connected to the compressor, and the electronic expansion valve controller is connected to the electronic expansion valve unit.

4. The centralized control system for a supermarket refrigerated and frozen display case according to claim 3, characterized in that, The electronic expansion valve unit includes a main valve and a liquid injection valve.

5. The centralized control system for a supermarket refrigerated and frozen display case according to claim 1, characterized in that, The compressor is a horizontal variable frequency compressor.

6. The centralized control system for a supermarket refrigerated and frozen display case according to claim 1, characterized in that, The condenser is a water-cooled condenser, and a water valve is installed between the inlet and outlet of the condenser and the external pipe. The water valve is connected to the controller.

7. The centralized control system for a supermarket refrigerated and frozen display case according to claim 1, characterized in that, The monitoring module also includes an environmental monitoring component, which is deployed in the area where each cabinet is located and connected to the controller. The environmental monitoring component includes an environmental temperature sensor and an environmental humidity sensor.

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