An ice storage system dual working condition cold water unit evaporator automatic switching device

Abstract

The present application relates to ice storage central air conditioning cold source power peak shifting and valley filling equipment technical field, provide a kind of ice storage system dual working condition water chiller evaporator automatic switching device, including dual working condition cold machine evaporator, glycol dilute solution reuse tank and glycol storage tank, dual working condition cold machine evaporator is connected with chilled water pump pipe, chilled water pump pipe end connects chilled water pump, still connected with glycol pipe, glycol pipe end connects glycol pump, dual working condition cold machine evaporator top is connected with exhaust pipe one, exhaust pipe one side is connected with air pump pipe, air pump pipe is connected with pressure sensor one, evaporator recharge pipe is connected between dual working condition cold machine evaporator and glycol storage tank, evaporator recharge pipe and dual working condition cold machine evaporator bottom pre-set drain opening are connected, and recharge pump is arranged at the junction of evaporator recharge pipe and glycol storage tank.Solve the defect that certain energy and equipment waste exists in the existing dual working condition cold machine.

Description

TECHNICAL FIELD

[0001] The present application relates to ice storage central air conditioning cold source power peak shifting equipment technical field, especially relates to a kind of ice storage system double working condition evaporator of water chiller automatic switching device. BACKGROUND

[0002] At present, double working condition cold machine exists certain energy and equipment waste when supplying cooling:

[0003] 1.double working condition cold machine outlet temperature is about 2 DEG C lower than normal cold machine when supplying cooling due to being separated by plate exchange, which reduces the energy efficiency of double working condition cold machine;

[0004] 2.because double working condition cold machine evaporator runs 25% ethylene glycol solution, its specific heat is about 3.7kJ / kg·℃, far lower than 4.2kJ / kg·℃ of water; its density 1040kg / m 3 close to water density, same refrigerating capacity, its flow is about 9% more than water, and ethylene glycol viscosity is higher than water, so the pipeline resistance coefficient of refrigerant ethylene glycol is also higher than water, resulting in high water pump energy consumption.

[0005] 3.compared with conventional electric refrigeration water chiller, ice storage system cold machine needs to run an additional ethylene glycol pump when supplying cooling.

[0006] 4.ice storage system plate exchange needs to bear double working condition cold machine cooling load, which needs to increase initial investment.

[0007] 5.ethylene glycol pump needs to bear pressure drop of evaporator, ice storage equipment and plate exchange. If evaporator can be switched to chilled water circuit when double working condition cold machine supplies cooling, ethylene glycol pump will only bear pressure drop of evaporator and ice storage equipment, or ice storage equipment and plate exchange. Ethylene glycol pump resistance can be reduced by about 1 / 3;

[0008] Therefore, the present application can automatically switch evaporator of double working condition cold machine between end chilled water circuit and ethylene glycol circuit, and clean and compress air purge residual ethylene glycol solution in evaporator during switching process, to further reduce the operating cost of ice storage central air conditioning cold source. SUMMARY

[0009] (I) technical problems to be solved

[0010] The present application aims to provide a kind of ice storage system double working condition water chiller evaporator automatic switching device, to solve the defects of existing double working condition cold machine that exists certain energy and equipment waste. (II) summary of the application

[0012] In order to solve the above technical problems, the present application provides the following technical solutions: an ice storage system dual working condition water chiller evaporator automatic switching device, comprising a dual working condition water chiller evaporator, a glycol dilute solution recycling tank and a glycol storage tank, the dual working condition water chiller evaporator is connected with a chilled water pump pipe, the chilled water pump pipe is connected with a chilled water pump at the end, and a glycol pipe is further connected, and the glycol pipe is connected with a glycol pump at the end;

[0013] An exhaust pipe one is connected above the dual working condition water chiller evaporator, one side of the exhaust pipe one is connected with a gas pump pipe, and a pressure sensor one is connected on the gas pump pipe;

[0014] An evaporator backfilling pipe is connected between the dual working condition water chiller evaporator and the glycol storage tank, the evaporator backfilling pipe is connected with a water leakage port arranged at the bottom of the dual working condition water chiller evaporator, and a backfilling pump is arranged at the connection position of the evaporator backfilling pipe and the glycol storage tank;

[0015] The other end of the glycol storage tank is connected with a storage tank backflow pipe, and the other end of the storage tank backflow pipe is connected to the exhaust pipe one;

[0016] A cleaning and emptying pipe is connected above the glycol dilute solution recycling tank, the cleaning and emptying pipe is connected with the storage tank backflow pipe and the evaporator backfilling pipe, a cleaning and emptying pump is connected on the cleaning and emptying pipe, a tap water supplement pipe is connected at the other end of the cleaning and emptying pipe, a pressure sensor two is connected on the tap water supplement pipe, and a constant pressure liquid supplement pipe is further connected on the tap water supplement pipe, and a pressure sensor three is connected on the constant pressure liquid supplement pipe.

[0017] Preferably, two groups of electrically-operated on-off butterfly valves C1 and C2 are arranged at the front end of the chilled water pump pipe, and two groups of electrically-operated on-off butterfly valves C3 and C4 are arranged at the tail end.

[0018] Preferably, two groups of electrically-operated on-off butterfly valves C5 and C6 are arranged at the front end of the glycol pump pipe, and two groups of electrically-operated on-off butterfly valves C7 and C8 are arranged at the tail end.

[0019] Preferably, a closed liquid level sensor LS1 and an electrically-operated on-off butterfly valve C14 are arranged on the exhaust pipe one.

[0020] Preferably, an electrically-operated on-off butterfly valve C13 is further connected on the gas pump pipe, and electrically-operated on-off butterfly valves C10 and C15 are connected on the storage tank backflow pipe.

[0021] Preferably, a closed liquid level sensor LS2 is arranged at the position close to the water leakage port of the evaporator backfilling pipe, and a group of electrically-operated on-off butterfly valves C16 are further connected.

[0022] Preferably, a closed liquid level sensor LS4 is connected between the backfilling pump and the glycol storage tank.

[0023] Preferably, the exhaust pipe two is connected with a closed liquid level sensor LS3 and an electric switch butterfly valve C17.

[0024] Preferably, the cleaning and emptying pipe is connected with an electric switch butterfly valve C9 near the ethylene glycol dilute solution recycling tank, and is connected with electric switch butterfly valves C11 and C12 near pressure sensor two and pressure sensor three respectively.

[0025] Preferably, one end of the tap water supplement pipe is a water supplement opening for connecting tap water, and one end of the ethylene glycol constant pressure liquid supplement pipe is used for connecting an ethylene glycol constant pressure liquid supplement device.

[0026] (Three) beneficial effects

[0027] The ice storage system double working condition cold water unit evaporator automatic switching device provided by the application has the advantages that:

[0028] 1. The double working condition cold water unit evaporator is automatically switched between the ethylene glycol system and the terminal chilled water in a full automatic mode, the energy consumption cost of the ethylene glycol pump during the daytime double working condition cold water supply is saved, the chilled water supply temperature of the double working condition cold water unit is improved, the ice storage system is further energy-saving and emission-reducing, and the initial investment of the ice storage system plate heat exchanger is saved. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0030] Figure 1 It is a front view structural schematic diagram of the application.

[0031] The reference signs in the drawings are as follows: 1, double working condition cold water unit evaporator; 2, ethylene glycol dilute solution recycling tank; 3, ethylene glycol storage tank; 4, chilled water pump; 5, chilled water pump pipe; 6, ethylene glycol pump; 7, ethylene glycol pump pipe; 8, exhaust pipe one; 9, pressure sensor one; 10, air pump pipe; 11, storage tank backflow pipe; 12, evaporator backfill pipe; 13, drain; 14, backfill pump; 15, exhaust pipe two; 16, cleaning and emptying pipe; 17, cleaning and emptying pump; 18, pressure sensor two; 19, pressure sensor three; 20, ethylene glycol constant pressure liquid supplement pipe; 21, tap water supplement pipe. DETAILED DESCRIPTION

[0032] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0033] In the description of the present application, it should be noted that unless specifically defined and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] Embodiment one

[0035] Please refer to Figure 1 The present application provides a kind of ice storage system dual working condition cold water unit evaporator automatic switching device, including dual working condition cold machine evaporator 1, glycol dilute solution recycling tank 2 and glycol storage tank 3, dual working condition cold machine evaporator 1 is connected with chilled water pump pipe 5, chilled water pump pipe 5 end connects chilled water pump 4, glycol pipe 7 is also communicated, and glycol pipe 7 end connects glycol pump 6;

[0036] Dual working condition cold machine evaporator 1 is connected with exhaust pipe one 8 in upper side, exhaust pipe one 8 one side is connected with air pump pipe 10, pressure sensor one 9 is connected on air pump pipe 10, evaporator backfilling pipe 12 is communicated between dual working condition cold machine evaporator 1 and glycol storage tank 3, evaporator backfilling pipe 12 and dual working condition cold machine evaporator bottom pre-set drain 13 are communicated, and backfilling pump 14 is arranged at the junction of evaporator backfilling pipe 12 and glycol storage tank 3;

[0037] Glycol storage tank 3 other end is connected with storage tank backflow pipe 11, and storage tank backflow pipe 11 other end is connected to exhaust pipe one 8;

[0038] Glycol dilute solution recycling tank 2 is connected with cleaning emptying pipe 16 in upper side, cleaning emptying pipe 16 is communicated with storage tank backflow pipe 11 and evaporator backfilling pipe 12, cleaning emptying pump 17 is connected on cleaning emptying pipe 16, and tap water replenishment pipe 21 is connected at the other end of cleaning emptying pipe 16, pressure sensor 18 is connected on tap water replenishment pipe 21, tap water replenishment pipe 21 is also communicated with constant pressure liquid supplementing pipe 20, and pressure sensor three 19 is connected on constant pressure liquid supplementing pipe 20;

[0039] The front end of the chilled water pump pipe 5 is equipped with two groups of electric switch butterfly valves C1 and C2, and the tail end is equipped with two groups of electric switch butterfly valves C3 and C4;

[0040] The front end of the ethylene glycol pump pipe 7 is equipped with two groups of electric switch butterfly valves C5 and C6, and the tail end is equipped with two groups of electric switch butterfly valves C7 and C8;

[0041] The exhaust pipe one 8 is equipped with a closed liquid level sensor LS1 and an electric switch butterfly valve C14;

[0042] The air pump pipe 10 is also connected with an electric switch butterfly valve C13, and the liquid storage tank return pipe 11 is connected with electric switch butterfly valves C10 and C15;

[0043] The evaporator backfill pipe 12 is equipped with a closed liquid level sensor LS2 near the drain 13, and is also connected with a group of electric switch butterfly valves C16;

[0044] The backfill pump 14 and the ethylene glycol liquid storage tank 3 are connected with a closed liquid level sensor LS4;

[0045] The exhaust pipe two 15 is connected with a closed liquid level sensor LS3 and an electric switch butterfly valve C17;

[0046] The cleaning and emptying pipe 16 is connected with an electric switch butterfly valve C9 near the ethylene glycol dilute solution recycling tank 2, and is connected with electric switch butterfly valves C11 and C12 near the pressure sensor two 18 and the pressure sensor three 19, respectively;

[0047] The tap water supplement pipe 21 has one end for connecting a tap water supplement port, and the other end of the constant pressure liquid supplement pipe 20 is used for connecting an ethylene glycol constant pressure liquid supplement device;

[0048] Example two

[0049] The working process from switching the evaporator to the chilled water circuit after the ice storage is finished is as follows:

[0050] 1. The ethylene glycol solution in the dual-condition cold machine evaporator 1 is discharged into the ethylene glycol liquid storage tank 3.

[0051] 1.1. Cut off the ethylene glycol circuit: close C5, C6, C7, and C8, and use double electric valves to increase reliability.

[0052] 1.2. Open C14, C10, and C17, and open the cleaning and emptying pump 17. Until LS2 feedbacks no liquid level, stop the cleaning and emptying pump 17, and then close C14, C10, and C17.

[0053] 2. The dual-condition cold machine evaporator 1 is flushed with water and then emptied and purged with compressed air after residual liquid.

[0054] 2.1. Add water: open C11 and C14 to add water. Until LS1 feedbacks liquid level, close C14 and C11.

[0055] 2.2. Circulating cleaning: open C15 for 5 minutes. Stop cleaning and empty the pump 17.

[0056] 2.3. Emptying: open C14, C9, open cleaning and emptying pump 17. Until LS2 feedback no liquid level, stop cleaning and emptying pump 17, then close C14.

[0057] 2.4. Compressed air purging residual liquid: open C13, compressed air purging residual liquid for 5 minutes, close C13, residual liquid into the ethylene glycol dilute solution recycling tank 2 storage.

[0058] 3. After injecting clean water, carry out daytime cooling supply.

[0059] 3.1. Inject clean water: open C11, C14 until LS1 feedback has liquid level, close C11, C14.

[0060] 3.2. Open C1, C2, C3, C4 for daytime dual working condition cooling machine cooling.

[0061] 3.3. After cooling supply, close C1, C2, C3, C4.

[0062] 4. Inject ethylene glycol solution

[0063] 4.1. Open C14, C16, open backfilling pump 14, LS4 feedback no liquid level or LS1 feedback has liquid level, then stop the pump. If C14 feedback no liquid level after stopping the pump, open C12. Until LS1 feedback has liquid level, close C12.

[0064] 4.2. Open C5, C6, C7, C8 to switch the evaporator to the ethylene glycol circuit.

[0065] Example three

[0066] Wherein, the air pump pipe 10 is externally connected with an air pump to realize the purpose of compressed air purging residual liquid, and a pressure sensor 9 is used for monitoring;

[0067] The tap water supplement pipe 21 is externally connected with a tap water supplement port on one side of the pipe for cleaning and cooling supply;

[0068] The short-circuited constant pressure liquid supplement pipe 20 is externally connected with an ethylene glycol constant pressure liquid supplement device on one side of the pipe for ethylene glycol liquid supplement constant pressure at any time;

[0069] In the description of the present application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] The device embodiments described above are only illustrative, wherein the units illustrated as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, that is, they can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0071] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An ice storage system dual working condition water chiller evaporator automatic switching device, comprising a dual working condition water chiller evaporator, a glycol dilute solution recycling tank and a glycol storage tank, characterized in that, The double working condition cold machine evaporator is connected with a chilled water pump pipe, the end of the chilled water pump pipe is connected with a chilled water pump, and a glycol pipe is also connected with the double working condition cold machine evaporator; The double working condition cold machine evaporator is connected with an exhaust pipe I, one side of the exhaust pipe I is connected with a gas pump pipe, and a pressure sensor I is connected to the gas pump pipe; The double working condition cold machine evaporator is connected with an evaporator backfill pipe, the evaporator backfill pipe is connected with a drain hole arranged at the bottom of the double working condition cold machine evaporator, and a backfill pump is arranged at the connection between the evaporator backfill pipe and the glycol storage tank; The other end of the glycol storage tank is connected with a storage tank backflow pipe, and the other end of the storage tank backflow pipe is connected with the exhaust pipe I; A cleaning and emptying pipe is connected to the glycol dilute solution recycling tank, the cleaning and emptying pipe is connected with the storage tank backflow pipe and the evaporator backfill pipe, a cleaning and emptying pump is arranged on the cleaning and emptying pipe, a tap water supplement pipe is connected to the other end of the cleaning and emptying pipe, a pressure sensor II is arranged on the tap water supplement pipe, and a glycol constant pressure liquid supplement pipe is also connected to the tap water supplement pipe, and a pressure sensor III is arranged on the glycol constant pressure liquid supplement pipe.

2. The ice storage system dual-mode water chiller evaporator automatic switching device of claim 1, wherein, Two groups of electrically-operated on-off butterfly valves C1 and C2 are arranged at the front end of the chilled water pump pipe, and two groups of electrically-operated on-off butterfly valves C3 and C4 are arranged at the tail end of the chilled water pump pipe.

3. The ice storage system dual-mode water chiller evaporator automatic switching device of claim 1, wherein, Two groups of electrically-operated on-off butterfly valves C5 and C6 are arranged at the front end of the glycol pump pipe, and two groups of electrically-operated on-off butterfly valves C7 and C8 are arranged at the tail end of the glycol pump pipe.

4. The ice storage system dual-mode water chiller evaporator automatic switching device of claim 1, wherein, A closed liquid level sensor LS1 and an electrically-operated on-off butterfly valve C14 are arranged on the exhaust pipe I.

5. The ice storage system dual-mode water chiller evaporator automatic switching device of claim 1, wherein, An electrically-operated on-off butterfly valve C13 is arranged on the gas pump pipe, and electrically-operated on-off butterfly valves C10 and C15 are arranged on the storage tank backflow pipe.

6. An ice storage system dual-mode water chiller evaporator automatic switching device according to claim 1, characterized in that, A closed liquid level sensor LS2 and an electrically-operated on-off butterfly valve C16 are arranged on the evaporator backfill pipe close to the drain hole.

7. An ice storage system dual-mode water chiller evaporator automatic switching device according to Claim 1, characterized in that, A closed liquid level sensor LS4 is arranged between the backfill pump and the glycol storage tank.

8. An ice storage system dual-mode water chiller evaporator automatic switching device according to claim 1, characterized in that, A closed liquid level sensor LS3 and an electrically-operated on-off butterfly valve C17 are arranged on the exhaust pipe II.

9. An ice storage system dual-mode water chiller evaporator automatic switching device according to Claim 1, characterized in that, An electrically-operated on-off butterfly valve C9 is arranged on the cleaning and emptying pipe close to the glycol dilute solution recycling tank, and electrically-operated on-off butterfly valves C11 and C12 are arranged on the cleaning and emptying pipe close to the pressure sensor II and the pressure sensor III, respectively.

10. An ice storage system dual-mode water chiller evaporator automatic switching device according to Claim 1, characterized in that, One end of the tap water supplement pipe is a water supplement opening for connecting tap water, and one end of the constant pressure liquid supplement pipe is used for connecting a glycol constant pressure liquid supplement device.

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