CN217817537U

CN217817537U - Energy-saving water chilling unit

Info

Publication number: CN217817537U
Application number: CN202221751124.XU
Authority: CN
Inventors: 李鹏; 梁任柱; 林丹; 昌运逸; 何昂泰; 林凌凌; 袁水荣
Original assignee: Guangdong Euroklimat Air Conditioning & Refrigeration Co ltd
Current assignee: Guangdong Euroklimat Air Conditioning & Refrigeration Co ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2022-11-15
Anticipated expiration: 2032-07-06

Abstract

The utility model discloses an energy-conserving cooling water set, including compressor, condenser, throttling element, evaporimeter, cooling tower and water tank, the compressor is digital scroll compressor including parallelly connected first compressor, second compressor and the third compressor that sets up, first compressor, second compressor and third compressor. The utility model discloses an energy-conserving cooling water set has realized that the compressor has different operation combinations, and the capacity of every compressor all can be adjusted to can adapt to different seasons, different ambient temperature, different water requirements, make the compressor move under the best capacity, reach energy-conserving purpose.

Description

Energy-saving water chilling unit

Technical Field

The utility model relates to an air conditioning equipment technical field, in particular to energy-conserving cooling water set.

Background

In the prior art, the problems of the type of a cooling tower, the heat transfer coefficient of a heat exchanger, evaporation loss and the like are generally considered for energy conservation of a water chilling unit. However, in practical applications, the requirements for the temperature of the chilled water and the amount of water used are different between winter and summer. In this respect, the prior art does not propose to have special measures to achieve energy saving. In the prior art, the type of a compressor of a water chilling unit is selected according to the requirement of water consumption in summer, but energy waste is inevitably caused by winter. Therefore, a new technical scheme is needed to be provided, so that the water chilling unit can flexibly adapt to the water use requirements in different seasons, and the purpose of energy conservation is achieved.

It is seen that improvements and enhancements to the prior art are needed.

SUMMERY OF THE UTILITY MODEL

In view of the deficiencies of the prior art, the purpose of the utility model is to provide an energy-saving water chilling unit, which aims to solve the technical problem that the water chilling unit in the prior art can not realize the technical performance when running in different seasons.

In order to achieve the purpose, the utility model adopts the following technical proposal:

an energy-saving water chilling unit comprises a compressor, a condenser, a throttling element, an evaporator, a cooling water tower and a water tank, wherein the compressor comprises a first compressor, a second compressor and a third compressor which are arranged in parallel, and the first compressor, the second compressor and the third compressor are all digital scroll compressors; the condenser is also provided with a cooling water inlet pipe and a cooling water return pipe, the cooling water return pipe is connected to the cooling water tower, the outlet end of the cooling water tower is connected with a first water pump, and the outlet end of the first water pump is connected to the cooling water inlet pipe; the evaporator is also provided with a chilled water outlet pipe and a chilled water return pipe, the chilled water outlet pipe is connected to the water tank, and the outlet end of the water tank is connected with a second water pump.

Furthermore, in the energy-saving water chilling unit, the maximum capacities of the second compressor and the third compressor are equal; the maximum output capacity of the first compressor is 2 times the maximum capacity of the second compressor.

Further, in the energy-saving water chilling unit, the capacity adjusting ranges of the first compressor, the second compressor and the third compressor are all 10% -100%.

Furthermore, in the energy-saving water chilling unit, a pressure difference transmitter is arranged between an inlet pipeline of the compressor and an outlet pipeline of the compressor.

Furthermore, in the energy-saving water chilling unit, the first water pump and the second water pump are both variable frequency pumps.

Further, in the energy-saving water chilling unit, the throttling element is an expansion valve.

Has the beneficial effects that: the utility model provides an energy-conserving cooling water set compares prior art, the utility model discloses a set up first compressor, second compressor and third compressor parallelly connected, and first compressor, second compressor and third compressor are digital scroll compressor, have realized that the compressor has different operation combinations, and the capacity of every compressor all can be adjusted to can adapt to different seasons, different ambient temperature, different water requirements, make the compressor move under the best capacity, reach energy-conserving purpose.

Drawings

Fig. 1 is a working principle diagram of the energy-saving water chilling unit provided by the utility model.

Detailed Description

The utility model provides an energy-conserving cooling water set, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, following right the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1, the present invention provides an energy-saving chiller. The drawings are only for explaining the working principle and are not to scale with the actual product. The terms "first," "second," and the like, as used herein, are used for convenience of description only and are not intended to limit the present invention. Other conventional components of the water chiller are not described in detail herein.

The energy-saving water chilling unit comprises a compressor, a condenser 2, a throttling element 3, an evaporator 4, a cooling water tower 5 and a water tank 7, wherein the compressor comprises a first compressor 11, a second compressor 12 and a third compressor 13 which are arranged in parallel, and the first compressor, the second compressor and the third compressor are all digital scroll compressors; the condenser is also provided with a cooling water inlet pipe 21 and a cooling water return pipe 22, the cooling water return pipe is connected to the cooling water tower 5, the outlet end of the cooling water tower is connected with the first water pump 6, and the outlet end of the first water pump is connected to the cooling water inlet pipe; the evaporator is also provided with a chilled water outlet pipe 41 and a chilled water return pipe 42, the chilled water outlet pipe is connected to the water tank 7, and the outlet end of the water tank is connected with a second water pump 8.

Preferably, the maximum capacities of the second and third compressors are equal; the maximum output capacity of the first compressor is 2 times the maximum capacity of the second compressor.

Preferably, the capacity adjustment ranges of the first compressor, the second compressor and the third compressor are all 10% -100%. The capacity modulation range described herein refers to a capacity modulation range in an operation state of the compressor, and the capacity is 0% in a shut-down state of the compressor.

Preferably, a differential pressure transducer 9 is arranged between the inlet pipe 101 of the compressor and the outlet pipe 102 of the compressor.

Preferably, the first water pump and the second water pump are both variable frequency pumps. In practical application, the frequency of the first water pump and the frequency of the second water pump can be adjusted according to water requirements in different seasons, and the energy-saving effect is further improved.

Preferably, the throttling element is an expansion valve.

For the sake of understanding, the following brief description is made of the working principle: the compressor, the condenser, the throttling element and the evaporator constitute a refrigerant circulation system. The water in the cooling tower is pumped to the condenser through the first water pump and then returns to the cooling water tower to form a cooling water circulation system. The refrigerated water that the evaporimeter came out sends the water tank through the second water pump, then sends terminal equipment (the drawing is not drawn, also is not in the utility model discloses an in the protection scope), get back to the evaporimeter through the refrigerated water wet return at last, form refrigerated water circulation system.

For ease of illustration, the first, second and third compressors are specified herein as 100% capacity of the entire chiller compressor at full capacity operation. Then: the first compressor full capacity operating condition is 50% capacity of the chiller unit compressor and the second or third compressor full capacity operating condition is 25% capacity of the chiller unit compressor. In practical application, according to different working conditions, the three compressors have the following operation combinations:

(1) When the water chilling unit operates and the required compressor capacity adjusting range is less than or equal to 25%, only the second compressor or the third compressor needs to be opened.

(2) When the water chilling unit operates and the required compressor capacity adjustment range is 25% -50%, the first compressor is turned on, and the second compressor and the third compressor are turned off (as an alternative scheme, the first compressor can be turned off, and the second compressor and the third compressor can be turned on).

(3) And only opening the first compressor, and opening the first compressor and the second compressor or the third compressor when the capacity adjusting range of the compressor of the refrigerating unit is 50% -75%.

(4) The first compressor, the second compressor, and the third compressor are all on.

In general, the above-described combinations of operations (1) to (4) correspond to "coarse adjustment". In addition, under each operation combination, the capacity of the compressor can be further adjusted (because the capacity adjustment range of each compressor is 10-100 percent), which is equivalent to fine adjustment.

According to the above analysis, the utility model discloses a set up first compressor, second compressor and third compressor parallelly connected, and first compressor, second compressor and third compressor are digital scroll compressor, have realized that the compressor has different operation combinations, and the capacity of every compressor all can be adjusted to can adapt to different seasons, different ambient temperature, different water requirements, make the compressor move under the best capacity, reach energy-conserving purpose.

It should be understood that equivalent substitutions or changes can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such changes or substitutions should be considered as the protection scope of the present invention.

Claims

1. An energy-saving water chilling unit comprises a compressor, a condenser, a throttling element, an evaporator, a cooling water tower and a water tank, and is characterized in that the compressor comprises a first compressor, a second compressor and a third compressor which are arranged in parallel, and the first compressor, the second compressor and the third compressor are all digital scroll compressors; the condenser is also provided with a cooling water inlet pipe and a cooling water return pipe, the cooling water return pipe is connected to the cooling water tower, the outlet end of the cooling water tower is connected with a first water pump, and the outlet end of the first water pump is connected to the cooling water inlet pipe; the evaporator is also provided with a chilled water outlet pipe and a chilled water return pipe, the chilled water outlet pipe is connected to the water tank, and the outlet end of the water tank is connected with a second water pump.

2. The energy saving chiller according to claim 1 wherein the maximum capacity of the second compressor and the maximum capacity of the third compressor are equal; the maximum output capacity of the first compressor is 2 times the maximum capacity of the second compressor.

3. The energy-saving water chilling unit according to claim 1 or 2, wherein the capacity adjustment ranges of the first compressor, the second compressor and the third compressor are 10% -100%.

4. The energy saving chiller according to claim 1 wherein a differential pressure transducer is disposed between the inlet pipe of the compressor and the outlet pipe of the compressor.

5. The energy-saving water chilling unit of claim 1, wherein the first water pump and the second water pump are variable frequency pumps.

6. The energy efficient chiller according to claim 1 wherein said throttling element is an expansion valve.