Gradient cooling magnetic suspension water chilling unit with cold accumulation function

Abstract

The utility model discloses a step cooling magnetic suspension water chilling unit with a cold accumulation function, and relates to the technical field of air conditioner refrigeration. The water chilling unit comprises a water inlet pipeline, a water outlet pipeline, a plurality of water chilling unit assemblies and at least one cold storage tank, the water chilling unit assembly comprises a natural cooling assembly, an evaporator, a compressor communicated with the evaporator, a condenser communicated with the compressor and a first drying filter communicated with the condenser, and the first drying filter is communicated with the evaporator. The cascade cooling of the water system is realized by connecting the refrigerating systems in series, cold water with larger temperature difference is prepared, the flow of the water system is reduced, and the conveying energy consumption of the system is further reduced; the cold storage tank is arranged on the water supply pipe, so that a natural cooling mode can be stably switched to a mechanical refrigeration mode; according to the utility model, the reliability of unit operation is improved while energy is saved and consumption is reduced, and the system is more suitable for wide application scenes.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of air conditioning refrigeration, especially relates to a step cooling magnetic suspension water chiller with cold storage. BACKGROUND

[0002] The heat dissipation of data center servers is higher and higher, and the refrigeration demand of data machine room is also higher and higher, for large air conditioning water system, the traditional supply and return water temperature difference is small, the system water flow is large, causes whole water system not only pipe diameter is big, and also needs higher conveying energy consumption. The water chiller is very important in the refrigeration system of data center, and the mode switching of the unit has great influence on the safe and stable operation of the whole data center. Therefore, it is particularly important to ensure the smooth switching of the water chiller in each mode while saving energy and reducing consumption.

[0003] With the development of information technology, the heat dissipation demand of data center is higher and higher, the supply and return water temperature difference of traditional data center is 5-8℃, the temperature difference is small, the flow is large, and the conveying energy consumption is high.

[0004] The traditional water chiller can only produce cold water with low temperature difference, and cannot produce cold water with large temperature difference, resulting in large water flow, high conveying energy consumption and large initial investment of large air conditioning water system. Moreover, the traditional water chiller does not set a cold storage tank, which cannot store excess cold energy when the environment temperature is low, and cannot provide more starting time for the compressor during mode switching to ensure the smooth switching of the unit mode. UTILITY MODEL CONTENTS

[0005] Based on the above deficiencies of the prior art, the technical problem solved by the utility model is to provide a step cooling magnetic suspension water chiller with cold storage, which realizes large supply and return water temperature difference through step cooling, reduces system water flow, greatly reduces water system conveying energy consumption, reduces air conditioning system initial investment, increases the reliability of unit operation while saving energy and reducing consumption, and is more suitable for wide application scenarios.

[0006] In order to solve the above technical problems, the utility model discloses a kind of cascade cooling magnetic levitation water chiller with cold accumulation, comprising: water inlet pipeline, water outlet pipeline, multiple water chiller components and at least one cold storage tank;Water chiller component includes natural cooling component, evaporator, with the compressor of evaporator communication, with the condenser of compressor communication, with the first dry filter of condenser communication, first dry filter is communicated with evaporator;First branch pipe is communicated between the evaporator of adjacent two water chiller components, and the evaporator on the water chiller component at terminal end is communicated with water outlet pipeline, and the evaporator on the water chiller component at opening end is communicated with water inlet pipeline;Second branch pipe is communicated on water inlet pipeline, and second branch pipe is communicated with the natural cooling component on multiple water chiller components, and third branch pipe is communicated between natural cooling component and water outlet pipeline;Fourth branch pipe is communicated between cold storage tank and water outlet pipeline.

[0007] Optionally, the connection node of the water inlet pipeline and the second branch pipe is set as a first node, and an electric three-way valve is arranged on the first node.

[0008] Optionally, the natural cooling component includes a natural cooling coil and a fan, and the natural cooling coil and the fan are arranged on the condenser.

[0009] Optionally, a fifth branch pipe is communicated between the condenser and the evaporator, the first dry filter is connected in series on the fifth branch pipe, and an electronic expansion valve and a ball valve are further communicated on the fifth branch pipe, and the first dry filter is located between the electronic expansion valve and the ball valve.

[0010] Optionally, a sixth branch pipe is communicated between the fifth branch pipe and the compressor, and the sixth branch pipe is communicated with a second dry filter.

[0011] Optionally, a seventh branch pipe is communicated between the compressor and the condenser.

[0012] Optionally, an eighth branch pipe and a ninth branch pipe are communicated between the seventh branch pipe and the fifth branch pipe, and the eighth branch pipe and the ninth branch pipe are connected in parallel.

[0013] Optionally, a first electromagnetic valve and a first ball valve are communicated on the ninth branch pipe.

[0014] Optionally, a second electromagnetic valve and a second ball valve are communicated on the eighth branch pipe.

[0015] Optionally, an electric regulating valve is communicated on the fourth branch pipe.

[0016] After adopting the above technical scheme, the cascade cooling magnetic levitation water chiller with cold accumulation of the utility model has the following beneficial effects compared with the prior art:

[0017] 1. The utility model discloses a cascade cooling of water system is realized through the mode of series refrigeration system, and the cold water of larger temperature difference is prepared, and the flow of water system is reduced, and then the energy consumption of system is reduced.

[0018] 2. The utility model discloses can reduce initial investment, reduce conveying energy consumption: the utility model discloses through cascade cooling, realizes larger supply and return water temperature difference, reduces system water flow, greatly reduces the conveying energy consumption of water system, reduces air conditioning system initial investment.

[0019] 3. The utility model discloses can improve unit reliability, through setting up the cold storage tank on the water supply pipe, the redundant cold energy under the natural cooling mode is stored in the cold storage tank, when the ambient temperature gradually rises, the cold storage tank is first cold, and the compressor system has more starting time, and the safety of unit natural cooling mode switching mechanical refrigeration mode is guaranteed.

[0020] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, which can be implemented according to the content of the specification, and in order to let the above and other purposes, features and advantages of the utility model can be more obvious and easy to understand, the following will be combined with preferred embodiments, and the drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the utility model embodiment, the drawings of the embodiment will be briefly introduced below.

[0022] Figure 1 It is the structure schematic diagram of the cascade cooling magnetic suspension cold water unit of the utility model with cold storage.

[0023] Among them, 1-cold storage tank, 2-electric regulating valve, 3-evaporator, 4-compressor, 5-second electromagnetic valve, 6-second ball valve, 7-first electromagnetic valve, 8-first ball valve, 9-second dry filter, 10-electronic expansion valve, 11-natural cooling coil, 12-fan, 13-first dry filter, 14-ball valve, 15-condenser, 16-electric three-way valve. DETAILED DESCRIPTION

[0024] The specific embodiment of the utility model will be described in detail below in combination with the drawings, which is part of the specification, and the principle of the invention is illustrated by the embodiment, and other aspects, features and advantages of the utility model will become apparent through the detailed description. In the referred drawings, same or similar components in different drawings are indicated by using same reference numerals.

[0025] The specific embodiment of the utility model will be described in detail below in combination with the drawings, which is part of the specification, and the principle of the invention is illustrated by the embodiment, and other aspects, features and advantages of the utility model will become apparent through the detailed description. In the referred drawings, same or similar components in different drawings are indicated by using same reference numerals.Figure 1 The specific structure of the step-by-step cooling magnetic suspension water chiller unit with cold storage of the utility model is described.

[0026] As shown in Figure 1 The step-by-step cooling magnetic suspension water chiller unit with cold storage of the utility model comprises a water inlet pipeline, a water outlet pipeline, a plurality of water chiller assemblies and at least one cold storage tank 1.

[0027] The utility model can improve the reliability of the unit, store the excess cold in the cold storage tank 1 in the natural cooling mode, when the environment temperature gradually rises, the cold storage tank 1 is cooled first, the compressor system has more starting time, and the safety of the unit natural cooling mode switching mechanical refrigeration mode is ensured.

[0028] The water chiller assembly comprises a natural cooling assembly, an evaporator 3, a compressor 4 communicated with the evaporator 3, a condenser 15 communicated with the compressor 4, a first dry filter 13 communicated with the condenser 15, and the first dry filter 13 is communicated with the evaporator 3.

[0029] The evaporators 3 on the adjacent two water chiller assemblies are communicated with a first branch pipe, the evaporator 3 on the water chiller assembly at the end is communicated with the water outlet pipeline, and the evaporator 3 on the water chiller assembly at the beginning is communicated with the water inlet pipeline.

[0030] The water inlet pipeline is communicated with a second branch pipe, the second branch pipe is communicated with the natural cooling assemblies on the plurality of water chiller assemblies, and the natural cooling assembly and the water outlet pipeline are communicated with a third branch pipe. The cold storage tank 1 and the water outlet pipeline are communicated with a fourth branch pipe.

[0031] The utility model realizes the step-by-step cooling of the water system through the series connection of the refrigeration system, produces cold water with a large temperature difference, reduces the flow of the water system, and further reduces the conveying energy consumption of the system; the cold storage tank 1 is arranged on the water supply pipe to ensure that the natural cooling mode can be smoothly switched to the mechanical refrigeration mode; the utility model increases the reliability of the unit operation while saving energy and reducing consumption, and is more suitable for a wide range of application scenarios. The utility model realizes a large water supply and return temperature difference through step-by-step cooling, reduces the water flow of the system, greatly reduces the conveying energy consumption of the water system, and reduces the initial investment of the air conditioning system.

[0032] As shown in Figure 1 The connection point of the water inlet pipeline and the second branch pipe is set as a first point, and an electric three-way valve 16 is arranged on the first point.

[0033] As shown in Figure 1As shown in the figure, the natural cooling assembly of the embodiment includes a natural cooling coil 11 and a fan 12, both of which are arranged on a condenser 15, and both of the second branch pipe and the third branch pipe are communicated with the natural cooling coil 11.

[0034] As Figure 1 shown in the figure, the condenser 15 of the embodiment is communicated with the evaporator 3 through a fifth branch pipe, a first drying filter 13 is connected in series on the fifth branch pipe, and an electronic expansion valve 10 and a ball valve 14 are also communicated on the fifth branch pipe, and the first drying filter 13 is located between the electronic expansion valve 10 and the ball valve 14.

[0035] As Figure 1 shown in the figure, the fifth branch pipe of the embodiment is communicated with the compressor 4 through a sixth branch pipe, and the sixth branch pipe is communicated with a second drying filter 9.

[0036] As Figure 1 shown in the figure, the compressor 4 of the embodiment is communicated with the condenser 15 through a seventh branch pipe.

[0037] As Figure 1 shown in the figure, the seventh branch pipe of the embodiment is communicated with the fifth branch pipe through an eighth branch pipe and a ninth branch pipe, and the eighth branch pipe and the ninth branch pipe are connected in parallel.

[0038] As Figure 1 shown in the figure, the ninth branch pipe of the embodiment is communicated with a first electromagnetic valve 7 and a first ball valve 8.

[0039] As Figure 1 shown in the figure, the eighth branch pipe of the embodiment is communicated with a second electromagnetic valve 5 and a second ball valve 6.

[0040] As Figure 1 shown in the figure, the fourth branch pipe of the embodiment is communicated with an electric regulating valve 2.

[0041] The utility model discloses a mode of setting up the cold storage tank on the water supply pipe through the series connection of multiple compressor refrigeration systems, realizes the water of making larger temperature difference and ensures the reliability of unit mode switching, and the specific technical scheme is as follows:

[0042] As Figure 1 shown, the magnetic levitation water chiller runs, when the mechanical refrigeration mode, the backwater passes through the water inlet pipeline and returns to the magnetic levitation water chiller, and the electric three-way valve 16 reverses, and the backwater flows to the evaporator 3 of three refrigeration cycles in turn, and after being cooled, the backwater is supplied to the end through the water outlet pipeline, and in this mode, the electric regulating valve 2 is closed, the refrigerant evaporates after absorbing the heat of water in the evaporator 3, enters the compressor 4, and the compressed refrigerant enters the condenser 15, is cooled, passes through the ball valve 14, the first drying filter 13 and the electronic expansion valve 10, and finally enters the evaporator 3, to complete a refrigeration cycle.

[0043] AsFigure 1 As shown, in the natural cooling mode, the compressor 4 is closed, the electric three-way valve 16 is switched, the return water flows to the natural cooling coil 11, the fan 12 adjusts the rotating speed according to the outdoor temperature, the return water is cooled, the cooled return water is supplied to the terminal through the outlet water pipeline, and the electric regulating valve 2 is adjusted according to the ambient temperature, and with the decrease of the ambient temperature, the excess cold water is stored in the cold storage tank 1.

[0044] When switching from the natural cooling mode to the mechanical refrigeration mode, the compressor 4 is started, the electric regulating valve 2 is fully opened, the cold storage tank 1 releases the cold, before the cold storage tank 1 completely releases the cold, the compressor 4 is fully opened and stably operated, the electric regulating valve 2 is closed, the electric three-way valve 16 is switched, and the magnetic suspension cold water enters the mechanical refrigeration mode.

[0045] It should be noted that all the electric devices involved in the present application can be powered by a battery or an external power supply.

[0046] The utility model discloses a plurality of circulating systems are designed in the water chiller, and the evaporation temperature of each circulating system reduces gradually, and the return water is cooled under the joint cooling of multiple systems, obtains the cooling of greater temperature difference, thereby realizes the system of large temperature difference and small flow, reduces the conveying energy consumption, and the cold storage tank 1 is arranged on the water supply pipe of the unit, and the excess cold is collected under the natural cooling mode. When the ambient temperature gradually rises, the natural cooling mode switches to the mechanical refrigeration mode, the cold storage tank 1 releases the stored cold first, gives the compressor 4 more starting time, and guarantees that the unit can switch smoothly.

[0047] The above is the preferred embodiment of the utility model, of course, cannot be defined in this way the right scope of the utility model, it should be pointed out that for ordinary skilled person in the art, on the premise of not departing from the principle of the utility model, still can make a number of improvements and changes, these improvements and changes also be considered as the protection scope of the utility model.

Claims

1. A cascade cooling magnetic levitation chiller unit with cold storage, characterized in that, include: Water inlet pipe, water outlet pipe, multiple chiller components and at least one cold storage tank (1); The chiller assembly includes a natural cooling assembly, an evaporator (3), a compressor (4) connected to the evaporator (3), a condenser (15) connected to the compressor (4), and a first dryer filter (13) connected to the condenser (15). The first dryer filter (13) is connected to the evaporator (3). The evaporators (3) on two adjacent chiller assemblies are connected by a first branch pipe, and the evaporator (3) on the chiller assembly at the end is connected to the outlet pipe, while the evaporator (3) on the chiller assembly at the beginning is connected to the inlet pipe. A second branch pipe is connected to the inlet pipe, which is connected to the natural cooling components on multiple chiller components, and a third branch pipe is connected between the natural cooling components and the outlet pipe. A fourth branch pipe connects the cold storage tank (1) to the outlet water pipe.

2. The cascade cooling magnetic levitation chiller unit with cold storage as described in claim 1, characterized in that, The connection point between the water inlet pipe and the second branch pipe is designated as the first connection point, and an electric three-way valve (16) is installed on the first connection point.

3. The cascade cooling magnetic levitation chiller unit with cold storage as described in claim 1, characterized in that, The natural cooling assembly includes a natural cooling coil (11) and a fan (12). Both the natural cooling coil (11) and the fan (12) are mounted on the condenser (15). The second branch pipe and the third branch pipe are connected to the natural cooling coil (11).

4. The cascade cooling magnetic levitation chiller unit with cold storage as described in claim 1, characterized in that, A fifth branch pipe connects the condenser (15) and the evaporator (3). A first dryer filter (13) is connected in series on the fifth branch pipe. An electronic expansion valve (10) and a ball valve (14) are also connected on the fifth branch pipe. The first dryer filter (13) is located between the electronic expansion valve (10) and the ball valve (14).

5. The cascade cooling magnetic levitation chiller unit with cold storage as described in claim 4, characterized in that, The fifth branch pipe is connected to the compressor (4) by a sixth branch pipe, and the sixth branch pipe is connected to the second dryer filter (9).

6. The cascade cooling magnetic levitation chiller unit with cold storage as described in claim 5, characterized in that, A seventh branch pipe connects the compressor (4) and the condenser (15).

7. The cascade cooling magnetic levitation chiller unit with cold storage as described in claim 6, characterized in that, The seventh branch pipe is connected to the fifth branch pipe by the eighth and ninth branch pipes, which are connected in parallel.

8. The cascade cooling magnetic levitation chiller unit with cold storage as described in claim 7, characterized in that, The ninth branch pipe is connected to the first solenoid valve (7) and the first ball valve (8).

9. The cascade cooling magnetic levitation chiller unit with cold storage as described in claim 7, characterized in that, The eighth branch pipe is connected to the second solenoid valve (5) and the second ball valve (6).

10. The cascade cooling magnetic levitation chiller unit with cold storage as described in claim 1, characterized in that, An electric regulating valve (2) is connected to the fourth branch pipe.

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