CN202141238U

CN202141238U - Double-evaporation temperature air-conditioner capable of independently controlling temperature and humidity

Info

Publication number: CN202141238U
Application number: CN201120053840U
Authority: CN
Inventors: 江亿; 刘晓华; 张涛; 夏建军; 赵康
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2011-03-03
Filing date: 2011-03-03
Publication date: 2012-02-08
Anticipated expiration: 2021-03-03

Abstract

The utility model relates to a double-evaporation temperature air-conditioner capable of independently controlling temperature and humidity, which is characterized by comprising a compressor, a condenser, an ejector, a high temperature evaporator, a low temperature evaporator, a throttling device and a gas-liquid separator, wherein an outlet of the compressor is connected with an inlet of the condenser, a first inlet of the ejector is connected with an outlet of the condenser, a second inlet of the ejector is connected with an outlet of the low temperature evaporator, outlets of the ejector are divided into two paths, one path is connected with an inlet of the low temperature evaporator by the throttling device, the other path is connected with an inlet of the high temperature evaporator, and an outlet of the high temperature evaporator is connected with an inlet of the compressor by the gas-liquid separator. The double-evaporation temperature air-conditioner is simple in equipment, convenient for run, and suitable for being applied on occasions with smaller demands on refrigerating output, such as small independent offices or families and the like.

Description

Two evaporating temperature air-conditioners that a kind of temperature and humidity are independently controlled

Technical field

The utility model relates to a kind of hvac equipment, two evaporating temperature air-conditioners of particularly independently controlling about a kind of temperature and humidity.

Background technology

The load of air-conditioning system comprises sensible heat load and latent heat load, and the task of air-conditioning system is exactly to realize the effective regulation and control to the Building Heat wet environment through handling sensible heat load and latent heat load.At present; Temperature can be separated processing with sensible heat load and latent heat load with the humidity independence control air conditioner system; Bear building latent heat load, controlled humidity through sending into dry air, through sending into the air of only handling or utilizing high temperature cold water to bear sensible heat load, control temperature through the radiation cooling end equipment through lowering the temperature.This air-conditioning regulative mode can be realized the independent control to temperature, humidity, when effectively realizing the regulation and control of Building Heat wet environment, can also realize good energy-saving effect.

In the air-conditioning system that temperature and humidity are independently controlled; The air themperature of bearing the required high temperature cold water temperature of temperature control task or sending into is generally about 18～20 ℃; The low-temperature receiver evaporating temperature of at this moment required compression refrigeration mode just can be far above the evaporating temperature of conventional dehumidification by condensation mode correspondence, and the refrigeration system efficiency can obtain large increase.And when utilizing the dehumidification by condensation mode to obtain dry air to bear the humidity control task, needed low-temperature receiver evaporating temperature is lower, generally below 5 ℃.For places such as family or small-sized independent offices, the air-conditioning latent heat load generally only accounts for about 20% of total load, bears the required cold of humidity control task and is significantly less than and bears the required cold of temperature control task.

Patented technology 1 discloses a kind of idle call double-temperature refrigerator water unit patent (ZL200410009292.1); This unit has adopted two-stage throttling, middle twin-stage compression refrigeration circulation of not exclusively cooling off; Produce high temperature cold water and low-temperature cold water, thereby realized the kind of refrigeration cycle of different evaporating temperature operations.But the disclosed system equipment of this patent is comparatively complicated, and unit capacity is bigger, is fit to be applied in the bigger place of refrigerating capacity demand, is not suitable for being applied in the less occasions of refrigerating capacity demand such as small-sized independent office or family.Patented technology 2 (patent No. is ZL200510063463.3) and patented technology 3 (patent No. is ZL200510028464.4) all are the single-stage injection/compression refrigerating systems that the refrigerant vapour that utilizes injector injection evaporimeter to produce makes up; Injector replaces device such as expansion valve to reclaim expansion work in these systems; Although that injector has is simple in structure, cost is low, movement-less part and adapt to characteristics such as two phase flow; Can be applied to the expansion work of utilizing cold-producing medium step-down process in the Vapor Compression Refrigeration Cycle, effectively improve the performance of refrigerant systems coefficient.But patented technology 2 all is the single-stage evaporation apparatus with patented technology 3, all can not realize the kind of refrigeration cycle of two evaporating temperature operations.Prior art 4 (the patent No.: ZL200510026386.4) disclose a kind of double-temperature refrigerator of compression/injection mixing circulation that utilizes and hidden the car refrigeration unit; It utilizes two-stage ejector and one-level compressor to make up the kind of refrigeration cycle of two evaporating temperatures, satisfies refrigerating chamber and driver's cabin air-conditioning demand simultaneously.The refrigerator evaporator of this unit (low temperature) side cold is much larger than driver's cabin side A/C evaporator (high temperature) side cold; The required low temperature side cold of temperature and humidity independence control air conditioner system is then far below the high temperature side cold, thereby this refrigeration unit with two evaporating temperatures can't directly be used for temperature and humidity independence control air conditioner system.

China's document 1 " a kind of novel steam compressed/spray the discussion of hybrid refrigeration cycle " (Fan Xiaowei; The moon is built the people; Liu Haifeng; Chen Zhongqi. XI AN JIAOTONG UNIVERSITY Subject Index, 30 (5): 5～11,1996) a kind of kind of refrigeration cycle (as shown in Figure 4) of utilizing injector to realize two evaporating temperature operations is analyzed.This kind of refrigeration cycle is applicable to the two-storage temperature refrigerator kind of refrigeration cycle, and the operative liquid cold-producing medium of condensator outlet still gets into the cryogenic vaporizer evaporation through throttling arrangement, and the expansion work of this throttling process is not utilized effectively.China's document 2 " refrigeration performance of four kinds of two warm Vapor Compression Refrigeration Cycle relatively " (Liu Jinghui; Chen Jiangping; Chen Zhijiu. applied science journal, 24 (5): 538～542,2006) several kinds of two temperature kind of refrigeration cycle (like Fig. 5, shown in Figure 6) of utilizing injector to make up are analyzed.The double flash evaporation temperature contrast of China's document 2 disclosed kind of refrigeration cycle is big (about 30 ℃); Be applicable to that the liquid refrigerant that is flowed out by condenser in the two-storage temperature refrigerator cyclic process with refrigeration and freezing function partly or entirely gets into the cold-producing medium of injector injection high-temperature evaporator side evaporation; Because the injector injection is limited in one's ability, makes high-temperature evaporator side refrigerating capacity be restricted accordingly.For the temperature of utilizing the dehumidification by condensation mode and humidity independence control air conditioner system; The difference of double flash evaporation temperature requirements is big (generally in 15 ℃) not too; And the high-temperature evaporator side cold of demand will be much larger than cryogenic vaporizer side cold, and these that mention in the document pair temperature and pressure contract/and jet refrigeration circulation all can't directly be used for the air-conditioning system that temperature, humidity are independently controlled.

Summary of the invention

To the problems referred to above, the purpose of the utility model provides a kind of temperature that is applied in occasions such as family or small-sized independent office of injector structure and two evaporating temperature air-conditioners that humidity is independently controlled of utilizing.

For realizing above-mentioned purpose; The utility model is taked following technical scheme: two evaporating temperature air-conditioners that a kind of temperature and humidity are independently controlled; It is characterized in that it comprises a compressor, a condenser, an injector, a high-temperature evaporator, a cryogenic vaporizer, a throttling arrangement and a gas-liquid separator; The outlet of said compressor connects the import of said condenser; First import of said injector connects the outlet of said condenser, and second import connects the outlet of said cryogenic vaporizer; The outlet of said injector is divided into two-way; The said throttling arrangement of leading up to connects the import of said cryogenic vaporizer; Another road connects the import of said high-temperature evaporator, and the outlet of said high-temperature evaporator connects the import of said compressor through said gas-liquid separator.

The utility model also comprises the terminal and water circulating pump of a radiation cooling, and the terminal outlet of said radiation cooling is connected with the import of said water circulating pump; The terminal import of said radiation cooling connects the high temperature cold water outlet of said high-temperature evaporator, and said recirculated water delivery side of pump connects the high temperature cold water import of said high-temperature evaporator.

The utility model adopts injector effectively to utilize the expansion work of cold-producing medium step-down process, compares the efficient that can improve kind of refrigeration cycle with the existing kind of refrigeration cycle of restricting elements such as expansion valve that adopts; Refrigeration system is moved in two evaporating temperatures, can utilize single kind of refrigeration cycle to satisfy simultaneously and produce dry air and the requirement of producing high temperature cold water (or cold wind); The refrigerating capacity ratio that the double flash evaporation device that is provided with in the utility model is corresponding can adapt to the hot humidity load ratio characteristics of buildings such as family or small-sized independent office, realizes that the temperature in these places, humidity independently controls.The utility model system equipment is simple, operation is convenient, is fit to be applied in the less occasions of refrigerating capacity demand such as small-sized independent office or family.

Description of drawings

Fig. 1 is the utility model structural representation

Fig. 2 adopts the utility model to produce cold water and the principle schematic of producing cold wind

Fig. 3 is that the high and low temperature evaporimeter all adopts air-cooled fundamental diagram in the utility model

Fig. 4 is the principle schematic of the two evaporating temperature kind of refrigeration cycle of Chinese document 1 compression/injection

Fig. 5 is the principle schematic of first kind of two warm kind of refrigeration cycle in the Chinese document 2

Fig. 6 is the principle schematic of second kind of two warm kind of refrigeration cycle in the Chinese document 2

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is carried out detailed description.

As shown in Figure 1, the utility model comprises a compressor 1, a condenser 2, an injector 3, a high-temperature evaporator 4, a cryogenic vaporizer 5, a throttling arrangement 6 and a gas-liquid separator 7.Wherein, the outlet of compressor 1 connects the import of condenser 2.First import of injector 3 is connected with the outlet of condenser 2, and second import is connected with the outlet of cryogenic vaporizer 5.The outlet of injector 3 is divided into two-way, and the throttling arrangement 6 of leading up to is connected with the import of cryogenic vaporizer 5, and another road is connected with the import of high-temperature evaporator 4, and the outlet of high-temperature evaporator 5 connects the import of compressor 1 through gas-liquid separator 7.

As shown in Figure 2; In the foregoing description; Terminal 8 and one water circulating pump 9 of a radiation cooling can be provided with again; The outlet of radiation cooling terminal 8 connects the import of water circulating pump 9, and the import of radiation cooling terminal 8 connects the high temperature cold water outlet of high-temperature evaporator 4, and the outlet of water circulating pump 9 connects the high temperature cold water import of high-temperature evaporator 4.

As shown in Figure 1; The utility model utilizes high-temperature evaporator 4 to handle sensible heat load, bear the temperature control task; Utilize cryogenic vaporizer 5 to handle latent heat load, bear the humidity control task simultaneously, thereby satisfy different temperature, humidity demand for control, specific operation process is: when the latent heat load ratio increases; Adjusting through throttling arrangement 6 increases the refrigerant flow that gets into cryogenic vaporizer 5, satisfies the latent heat load processing demands; Otherwise then reduce the refrigerant flow that gets into cryogenic vaporizer 5.When total load is a required overall refrigerating effect when increasing, satisfy the refrigerating capacity demand through the rotating speed that improves compressor 1; Otherwise then reduce the rotating speed of compressor 1.From cold-producing medium, three aspects of empty G&W, the utility model is realized the course of work of independent control temperature and humidity is set forth in detail below.

For cold-producing medium; Gaseous refrigerant liquefy after condenser 2 condensations flows into injector 3; Liquid refrigerant is from the nozzle ejection of injector 3; Meanwhile, injector 3 injections are from the refrigerant vapour of cryogenic vaporizer 5 evaporations, and the liquid refrigerant that condenser 2 flows out mixes diffusion with the refrigerant vapour that evaporates through cryogenic vaporizer 5 in injector 3; The cold-producing medium that a part is mixed behind the diffusion gets into cryogenic vaporizer 5 through throttling arrangement 6, and evaporated refrigerant vapor gets into injector 3 more also by the cold-producing medium injection that flows into from injector 3 nozzles; Cold-producing medium behind another part mixing diffusion gets into high-temperature evaporator 4, gets into gas-liquid separator 7 through the cold-producing medium of pervaporation and carries out gas-liquid separation.Through behind the gas-liquid separator 7, gaseous refrigerant gets into compressor 1, and cold-producing medium after compression gets into condenser 2 again.

For air, as shown in Figure 3, in said process, air obtains high temperature air 10 in condenser 2 and cold-producing medium heat exchange; A part high temperature air in cryogenic vaporizer 5 through with the cold-producing medium heat exchange after by cool-down dehumidification, obtain low temperature drying air 11; Another part high temperature air in high-temperature evaporator 4 through with the cold-producing medium heat exchange after, obtain Cryogenic air 12.

For water, as shown in Figure 2, water gets into high-temperature evaporators 4 through the high temperature cold water import of high-temperature evaporator 4 13, reduces the high temperature cold water that obtains (such as 18 ℃, but being not limited thereto) with temperature after the cold-producing medium heat exchange in the high-temperature evaporator 4; High temperature cold water is sent into radiation cooling end 8 via the high temperature cold water outlet 14 of high-temperature evaporator 4, and after radiation cooling terminal 8 carried out heat exchange, cold water temperature raise, and sends high-temperature evaporator 4 back to by water circulating pump 9 again.

Above-mentioned each embodiment only is used to explain the utility model; Wherein the structure of each parts, connected mode etc. all can change to some extent; Every equivalents of on the basis of the utility model technical scheme, carrying out and improvement all should not got rid of outside the protection domain of the utility model.

Claims

1. two evaporating temperature air-conditioners of independently controlling of temperature and humidity is characterized in that it comprises a compressor, a condenser, an injector, a high-temperature evaporator, a cryogenic vaporizer, a throttling arrangement and a gas-liquid separator; The outlet of said compressor connects the import of said condenser; First import of said injector connects the outlet of said condenser, and second import connects the outlet of said cryogenic vaporizer; The outlet of said injector is divided into two-way; The said throttling arrangement of leading up to connects the import of said cryogenic vaporizer; Another road connects the import of said high-temperature evaporator, and the outlet of said high-temperature evaporator connects the import of said compressor through said gas-liquid separator.

2. two evaporating temperature air-conditioners that a kind of temperature as claimed in claim 1 and humidity are independently controlled is characterized in that: it also comprises the terminal and water circulating pump of a radiation cooling, and the terminal outlet of said radiation cooling is connected with the import of said water circulating pump; The terminal import of said radiation cooling connects the high temperature cold water outlet of said high-temperature evaporator, and said recirculated water delivery side of pump connects the high temperature cold water import of said high-temperature evaporator.