Refrigeration mechanism

Abstract

The utility model provides a refrigerating mechanism. The refrigerating mechanism comprises a first series connection pipeline, a second series connection pipeline and a first branch. The first series pipeline comprises a cold water distributor, a production air conditioning unit and a cold water collector which are connected in sequence; the second series pipeline comprises a cold water separator, a cold and hot water separator, a fan coil and a cold water collector which are connected in sequence; the two ends of the first branch are communicated with the production air conditioning unit and the cold and hot water separator respectively, so that outlet water of the production air conditioning unit flows into the cold and hot water separator; the water inlet end of the cold water separator is communicated with the water outlet end of the refrigerating unit; and the water outlet end of the cold water collector is communicated with the water inlet end of the refrigerating unit. According to the technical scheme, the temperature of the water flowing into the office fan pipe disc is increased, the conditions of ceiling water dripping and mold breeding caused by surface dew formation of the ventilation pipeline are improved, and meanwhile energy consumption waste is reduced.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning systems, and more specifically, to a refrigeration mechanism. Background Technology

[0002] In the air conditioning systems of manufacturing enterprises, it is common practice for production air conditioning units and fan coil units to share the chilled water system of the chiller. For example... Figure 1 As shown, after the chilled water flows out of the chiller unit 100, it passes through the chilled water separator 200. Part of the chilled water flows to the production air conditioning unit 300, and the other part flows to the fan coil unit 600. Finally, the chilled water flowing through the production air conditioning unit 300 and the fan coil unit 600 are collected in the chilled water collector 400. The water in the chilled water collector 400 flows to the chiller unit 100 for cooling, and then the chilled water cycle begins again.

[0003] However, the above-mentioned chilled water circulation process has the following problems: (1) Over-cooling leads to condensation: In order to meet the dehumidification needs, the production air conditioning unit 300 generally requires a chilled water temperature of 8-10℃, while the office does not require humidity, and its chilled water temperature requirement is only about 14℃, which leads to the chilled water temperature sent to the fan coil unit being too low, causing condensation on the surface of the ventilation duct, resulting in problems such as dripping water from the ceiling and mold growth; (2) Significant energy waste: Due to the low temperature of the chilled water provided by the air conditioning in the office, the load of the refrigeration unit increases, especially in the high temperature weather of summer, which may make the refrigeration unit insufficient and unable to guarantee the refrigerant demand for temperature and humidity in the production site, while causing energy waste. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a refrigeration mechanism that can improve the problem of low chilled water temperature delivered to the fan coil unit.

[0005] To achieve the above technical objectives, the technical solution adopted in this application is as follows:

[0006] This application provides a refrigeration mechanism, including a first series pipe, a second series pipe, and a first branch;

[0007] The first series pipeline includes a chilled water separator, a production air conditioning unit, and a chilled water collector connected in sequence, wherein the production air conditioning unit is used to cool the production site;

[0008] The second series pipeline includes the cold water distributor, the hot and cold water distributor, the fan coil unit and the cold water collector connected in sequence, and the fan coil unit is used to cool the office space;

[0009] The two ends of the first branch are respectively connected to the production air conditioning unit and the hot and cold water distributor, so that the water outlet of the production air conditioning unit can flow into the hot and cold water distributor;

[0010] The inlet of the cold water separator is connected to the outlet of the refrigeration unit;

[0011] The outlet of the cold water collector is connected to the inlet of the refrigeration unit.

[0012] Furthermore, it also includes:

[0013] A first flow meter is installed at the outlet end of the production air conditioning unit to measure the outlet flow rate of the production air conditioning unit.

[0014] The second flow meter is installed at the inlet end of the fan coil unit and is used to measure the inflow rate of the fan coil unit.

[0015] The diversion pipeline is connected to both the production air conditioning unit and the chilled water collector;

[0016] A switch assembly is disposed on the flow guide pipe;

[0017] The switching assembly is used to open when the value of the first flow meter is greater than the value of the second flow meter, so that the water outlet of the production air conditioning unit flows into the cold water collector through the guide pipe.

[0018] Furthermore, the flow guiding pipeline includes a second branch and a third branch;

[0019] The two ends of the second branch are respectively connected to the cold water collector and the cold water distributor;

[0020] The third branch is connected to the second branch and the production air conditioning unit at both ends, respectively.

[0021] The switch assembly is disposed on the second branch and is located between the third branch and the second branch and the cold water collector.

[0022] The second branch is also equipped with a manual valve, which is located between the third branch and the second branch and the cold water dispenser. The manual valve is normally closed.

[0023] Furthermore, the refrigeration mechanism also includes:

[0024] The first regulating valve is located between the cold water distributor and the hot and cold water distributor;

[0025] A pressure sensor is installed inside the hot and cold water manifold to detect the pressure of the hot and cold water manifold.

[0026] A temperature sensor is installed on the fan coil unit to detect the temperature of the fan coil unit;

[0027] The first regulating valve is used to increase its opening degree when the pressure is less than a pressure threshold and / or the temperature is greater than a temperature threshold.

[0028] Furthermore, the cold water collector is equipped with a water supply pipe, and the water supply pipe is equipped with a pressure reducing valve, so that the pressure of the cold and hot water collector can be changed through the pressure reducing valve.

[0029] Furthermore, a second regulating valve is provided between the end of the first branch that is connected to the production air conditioning unit and the cold water collector.

[0030] Furthermore, the second series pipeline also includes a hot and cold water collector, wherein the cold water collector, the fan coil unit, the hot and cold water collector and the cold water collector are connected in sequence.

[0031] The utility model adopting the above technical solution has the following advantages:

[0032] In the technical solution provided in this application, since the outlet of the chilled water collector is connected to the inlet of the refrigeration unit, the chilled water with a lower temperature flowing out of the refrigeration unit flows into the hot and cold water distributor. Because a first branch is set up, the outlet water of the production air conditioning unit flows into the hot and cold water distributor, thereby mixing the outlet water of the production air conditioning unit with the chilled water with a lower temperature. This increases the temperature of the water flowing into the office fan coil unit, improves the condensation on the surface of the ventilation duct, and reduces the situation of dripping water and mold growth on the ceiling. At the same time, it also reduces energy waste. Attached Figure Description

[0033] This application can be further illustrated by the non-limiting embodiments given in the accompanying drawings. It should be understood that the following drawings only illustrate some embodiments of this application and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained from these drawings without any inventive effort.

[0034] Figure 1 This is a schematic diagram of the chilled water flow direction in a refrigeration structure of existing technology.

[0035] Figure 2 This is a schematic diagram of the structure provided for an embodiment of this application.

[0036] Figure 3 This is a schematic diagram of the chilled water flow direction provided in an embodiment of this application.

[0037] Icons: 100-Refrigeration unit; 200-Chilled water distributor; 300-Production air conditioning unit; 400-Chilled water collector; 500-Chilled and hot water distributor; 600-Fan coil unit; 700-Chilled and hot water collector; 800-Chiller pump; 900-First branch; 1000-Second branch; 1100-Third branch; 1200-First regulating valve; 1300-Switch assembly; 1400-Manual valve; 1500-Second regulating valve; 1600-Make-up water pipe; 1700-Pressure reducing valve. Detailed Implementation

[0038] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. In the description of this application, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] This embodiment proposes a refrigeration mechanism, such as... Figure 2 and Figure 3 As shown, it includes a first series pipeline, a second series pipeline, and a first branch 900.

[0040] The first series pipeline includes a chilled water distributor 200, a production air conditioning unit 300, and a chilled water collector 400 connected in sequence. The production air conditioning unit 300 is used for refrigerating the production area.

[0041] The second series piping includes a cold water distributor 200, a hot and cold water distributor 500, a fan coil unit 600, a hot and cold water collector 700, and a cold water collector 400 connected in sequence. The fan coil unit 600 is used to refrigerate the office area.

[0042] The cold water distributor is mainly used to distribute the cold water flow from the main water pipe to multiple branch pipes to meet the needs of different water usage points. It ensures that each area or equipment can obtain a stable and adequate supply of cold water.

[0043] A hot and cold water manifold can simultaneously distribute cold and hot water to different branch pipes, making it suitable for situations requiring both hot and cold water supply. It improves water resource utilization efficiency and allows users to easily adjust the water temperature according to their needs.

[0044] The cold water collector is mainly used to collect the cold water returning from various branch pipes and gather it into the return water main pipe to realize the recycling of water resources.

[0045] Hot and cold water manifolds can simultaneously collect both cold and hot water and channel them into the return water main. They are widely used in systems that require simultaneous processing of both cold and hot water to ensure efficient system operation and energy savings.

[0046] The inlet of the chilled water separator 200 is connected to the outlet of the chiller unit 100, and the outlet of the chilled water collector 400 is connected to the inlet of the chiller unit 100.

[0047] The two ends of the first branch 900 are connected to the production air conditioning unit 300 and the hot and cold water distributor 500, respectively, so that the outlet water of the production air conditioning unit 300 can flow into the hot and cold water distributor 500. For example, Figure 2 As shown, one end of the first branch 900 is connected to the pipeline between the chilled water distributor 200 and the hot and cold water distributor 500, and the other end is connected to the return water pipeline C of the production air conditioning unit 300. This allows the return water generated by the production air conditioning unit 300 to flow directly into the hot and cold water distributor 500, mixing with the chilled water flowing in from the chilled water distributor 200. This increases the temperature of the chilled water, enabling the tiered utilization of refrigerant and preventing the water flowing into the fan coil unit 600 from being too cold. The mixing ratio, i.e., controlling the temperature of the chilled water entering the fan coil unit 600, can be achieved by changing the pipe diameter of the first branch 900 or by installing a regulating valve on the first branch 900. This ensures that the office chilled water supply temperature is controlled above the indoor air dew point temperature (usually 12-14℃), fundamentally preventing condensation in the pipes. Furthermore, since some of the return water does not need to be cooled by the chiller, the operating power of the chiller is reduced, saving cooling energy consumption.

[0048] like Figure 2 As shown, this embodiment also includes a flow guide pipe connected to both the production air conditioning unit 300 and the chilled water collector 400, and a switch assembly 1300 installed on the flow guide pipe. A first flow meter (not shown) and a second flow meter (not shown) are also provided. The first flow meter is installed at the outlet of the production air conditioning unit 300 to measure the outlet flow rate of the production air conditioning unit 300, and the second flow meter is installed at the inlet of the fan coil unit 600 to measure the inlet flow rate of the fan coil unit 600.

[0049] When the value of the first flow meter is greater than the value of the second flow meter, the switch assembly opens, allowing the outlet water of the production air conditioning unit 300 to flow into the cold water collector 400 through the guide pipe. In this embodiment, the switch assembly 1300 is normally closed. When the controller receives a signal that the value of the first flow meter is greater than the value of the second flow meter, it sends a low-level signal. Upon receiving this low-level signal, the switch assembly 1300 changes from the closed mode to the open mode. At the same time, since the manual valve 1400 is also normally closed, it closes without manual intervention. At this time, the return water from the return water pipe C flows into the cold water collector 400, preventing excessive return water from entering the hot and cold water distributor 500, thereby achieving a balance in the water supply system.

[0050] In this embodiment, the guide pipe includes a second branch 1000 and a third branch 1100. The two ends of the second branch 1000 are connected to the cold water collector 400 and the cold water separator 200, respectively. The two ends of the third branch 1100 are connected to the second branch 1000 and the production air conditioning unit 300, respectively. The switch assembly 1300 is disposed on the second branch 1000 and is located between the third branch 1100 and the second branch 1000 and the cold water collector 400. The second branch 1000 is also provided with a manual valve 1400, which is located between the third branch 1100 and the second branch 1000 and the cold water separator 200. The manual valve 1400 is normally closed.

[0051] In this embodiment, the refrigeration mechanism also includes a first regulating valve 1200, a pressure sensor (not shown in the figure), and a temperature sensor (not shown in the figure).

[0052] The first regulating valve 1200 is located between the cold water distributor 200 and the hot and cold water distributor 500. The pressure sensor is located inside the hot and cold water distributor 500 to detect the pressure of the hot and cold water distributor 500. The temperature sensor is located on the fan coil unit 600 to detect the temperature of the fan coil unit 600.

[0053] When the pressure is less than the pressure threshold and / or the temperature is greater than the temperature threshold, the opening of the first regulating valve 1200 increases.

[0054] For example, when the temperature is greater than the temperature threshold, it means that the amount of chilled water flowing to the fan coil unit 600 is decreasing, and the flow rate of chilled water needs to be increased to cool the office. Therefore, the opening of the first regulating valve 1200 is increased to increase the flow rate of chilled water from the cold water distributor to the hot and cold water distributor to lower the temperature.

[0055] The control process can be as follows: when the temperature value collected by the temperature sensor is greater than the temperature threshold, a sensing signal is sent to the controller, and the controller sends a low-level signal to the first regulating valve 1200, and the opening degree of the first regulating valve 1200 increases.

[0056] For example, when the pressure is less than the pressure threshold, it means that the internal pressure of the hot and cold water manifold 500 is low and water needs to be added to balance the pressure inside the hot and cold water manifold 500. Therefore, the opening of the first regulating valve 1200 is increased to increase the flow rate into the hot and cold water manifold 500 and increase the pressure of the hot and cold water manifold 500.

[0057] The control process can be as follows: when the temperature value collected by the pressure sensor is less than the pressure threshold, a sensing signal is sent to the controller, and the controller sends a low-level signal to the first regulating valve 1200, and the opening degree of the first regulating valve 1200 increases.

[0058] For example, when the pressure is less than the pressure threshold and the temperature is greater than the temperature threshold, the opening of the first regulating valve 1200 increases. The control process can be as follows: when the temperature value collected by the pressure sensor is less than the pressure threshold and the temperature value collected by the temperature sensor is greater than the temperature threshold, a sensing signal is sent to the controller, and the controller sends a low-level signal to the first regulating valve 1200, thereby increasing the opening of the first regulating valve 1200.

[0059] The cold water collector 400 is equipped with a water supply pipe 1600, and the water supply pipe 1600 is equipped with a pressure reducing valve 1700. The pressure reducing valve 1700 can change the pressure of the cold and hot water collectors, and by adjusting the setting value of the pressure reducing valve, a certain pressure difference is ensured between the cold and hot water collectors and the cold water collector, thereby ensuring the circulation of chilled water.

[0060] The first branch is connected to the production air conditioning unit at one end, and a second regulating valve 1500 is installed between it and the cold water collector to regulate the flow rate of the return water from the production air conditioning unit 300 to the cold water collector.

[0061] In this embodiment, the return water from the cold water collector 400 is pumped into the chiller unit 100 via the chilled water pump 800. After cooling the return water, the chiller unit 100... Figure 2 Pipe A flows into the cold water distributor 200, and the cold water distributor 200 passes through... Figure 2 Pipe D flows into the production air conditioning unit 300. Part of the return water from the production air conditioning unit 300 flows to the chilled water collector 400 via pipe C. During this flow, part of the return water flows to the hot and cold water distributor 500 via the first branch 900, and the other part flows to the chilled water collector 400. The chilled water in the hot and cold water distributor 500 mixes with the return water from the production air conditioning unit 300 and is heated before flowing through the distributor. Figure 2 Pipe B in the middle directs the heated chilled water to fan coil unit 600, and then through... Figure 2 Pipe E in the middle flows to the hot and cold water collector 700, and finally, after mixing in the cold water collector 400, it flows back to the chilled water pump.

[0062] This embodiment only requires the addition of the first, second, and third branches, without replacing the original chiller and main pipeline. By installing the second regulating valve, the ratio of return water from the production air conditioning unit to the chilled water of the chiller is adjusted to achieve the effect of heating the chilled water of the office air conditioning, fundamentally eliminating condensation in the pipeline, and the modification cost is lower than that of the traditional solution.

[0063] This embodiment uses an electric regulating valve to control the flow ratio of the main line (from the chilled water distributor to the hot and cold water distributor via the chiller) and the branch line (the return water from the production air conditioning unit is directly connected to the hot and cold water distributor) in real time. The mixing temperature can be adjusted according to changes in office load without manual intervention, and the system response time is short.

[0064] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A refrigeration mechanism, characterized in that, It includes a first series conduit, a second series conduit, and a first branch line; The first series pipeline includes a chilled water separator, a production air conditioning unit, and a chilled water collector connected in sequence, wherein the production air conditioning unit is used to cool the production site; The second series pipeline includes the cold water distributor, the hot and cold water distributor, the fan coil unit and the cold water collector connected in sequence, and the fan coil unit is used to cool the office space; The two ends of the first branch are respectively connected to the production air conditioning unit and the hot and cold water distributor, so that the water outlet of the production air conditioning unit can flow into the hot and cold water distributor; The inlet of the cold water separator is connected to the outlet of the refrigeration unit; The outlet of the cold water collector is connected to the inlet of the refrigeration unit.

2. The refrigeration mechanism according to claim 1, characterized in that, Also includes: A first flow meter is installed at the outlet end of the production air conditioning unit to measure the outlet flow rate of the production air conditioning unit. The second flow meter is installed at the inlet end of the fan coil unit and is used to measure the inflow rate of the fan coil unit. The diversion pipeline is connected to both the production air conditioning unit and the chilled water collector; A switch assembly is disposed on the flow guide pipe; The switching assembly is used to open when the value of the first flow meter is greater than the value of the second flow meter, so that the water outlet of the production air conditioning unit flows into the cold water collector through the guide pipe.

3. The refrigeration mechanism according to claim 2, characterized in that, The flow diversion pipeline includes a second branch and a third branch; The two ends of the second branch are respectively connected to the cold water collector and the cold water distributor; The third branch is connected to the second branch and the production air conditioning unit at both ends, respectively. The switch assembly is disposed on the second branch and is located between the third branch and the second branch and the cold water collector. The second branch is also equipped with a manual valve, which is located between the third branch and the second branch and the cold water dispenser. The manual valve is normally closed.

4. The refrigeration mechanism according to claim 1, characterized in that, The refrigeration mechanism also includes: The first regulating valve is located between the cold water distributor and the hot and cold water distributor; A pressure sensor is installed inside the hot and cold water manifold to detect the pressure of the hot and cold water manifold. A temperature sensor is installed on the fan coil unit to detect the temperature of the fan coil unit; The first regulating valve is used to increase its opening degree when the pressure is less than a pressure threshold and / or the temperature is greater than a temperature threshold.

5. The refrigeration mechanism according to claim 1, characterized in that, The cold water collector is equipped with a water supply pipe, and the water supply pipe is equipped with a pressure reducing valve, which changes the pressure of the cold and hot water collector.

6. The refrigeration mechanism according to claim 1, characterized in that, A second regulating valve is provided between the end of the first branch that is connected to the production air conditioning unit and the cold water collector.

7. The refrigeration mechanism according to claim 1, characterized in that, The second series pipeline also includes a hot and cold water collector, wherein the cold water collector, fan coil unit, hot and cold water collector and cold water collector are connected in sequence.

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