CN2864435Y

CN2864435Y - Direct expansion type earth resource heat pump air conditioner set

Info

Publication number: CN2864435Y
Application number: CNU2006200011562U
Authority: CN
Inventors: 张立峰
Original assignee: BEIJING OASIS-DEHAN ENVIRONMENTAL PROTECTION CENTER
Current assignee: GUANGZHOU OASIS DEHAN ENVIRONMENTAL PROTECTION CENTER CO., LTD.
Priority date: 2006-01-17
Filing date: 2006-01-17
Publication date: 2007-01-31
Anticipated expiration: 2016-01-17

Abstract

The utility model relates to an air conditioning unit which utilizes geothermal power to regulate the air, in particular to a direct expansion type ground source heat pump air-conditioning unit with high heat transfer efficiency, whose refrigerant directly contacts with the soil through a geothermal heat exchanger. The utility model is composed of a vapor-liquid separator, a compressor, a four-way reversing valve, an air conditioning heat exchanger, a geothermal heat exchanger, a thermal expansion valve, a heat recovery valve and a dry filter. The vapor-liquid separator is connected with the compressor; the compressor is connected with the four-way reversing valve; the four-way reversing valve is respectively connected with the air-conditioning heat exchanger, the geothermal heat exchanger and the heat recovery valve; the air-conditioning heat exchanger is connected with the geothermal heat exchanger through a liquid observer, the dry filter and the thermal expansion valve; the geothermal heat exchanger is connected with the vapor-liquid separator through the heat recovery valve. The utility model is composed by less components and does not need pumping well recharging well, well water pump and circulating pump; the water-less heat exchangers make no valve corrosion, freezing and damage.

Description

Direct expansion formula geothermal heat pump air-conditioner unit

Technical field

The utility model relates to a kind of air-conditioning unit that utilizes underground heat to regulate air, and particularly a kind of cold-producing medium directly contacts a kind of direct expansion formula geothermal heat pump air-conditioner unit with higher heat exchange efficiency by geothermal heat exchanger with soil.

Background technology

At present, ground source heat pump technology mainly utilizes a heat transmitter from the soil draw heat, carry out air conditioning via a secondary heat exchange device and working fluid, for instance, water (refrigerating medium) is pumped to the underground heat equipment in the heating building thing, there is a heat exchanger its inside of traditional heat pump, and it is used for absorbing heat (heating) or release heat (refrigeration) from water, flows back to underground quilt then and heats up again and cool off.This type of outdoor heat exchange system, its quantities is big, constructional difficulties, heat exchange efficiency are low.In the past, units concerned did a lot of the trial and removed to improve direct combined hot pumping system, but these effort are all because former thereby whole failures of economy or function aspects, and its reason is as follows: insufficient in the oil return of heating mode lower compression machine; Do not have enough evaporimeter length and space to come suitably draw heat from soil, thereby cause the low capacity and the poor efficiency of system; The expense of condensing agent is 10 times of traditional ground resource heat pump of a similar capacity; Needed cold-producing medium is equivalent under heating mode three times under refrigeration mode; Under cooling activation, lack the cold-producing medium that a suitable manner is stored extra needs, and this does not need under heating mode; For the calculating that changes the capacity of the condenser that produces huge change because of the soil moisture is to lack efficient; It is very difficult that the simple soil heat-exchange tube installation method of one cover is provided.

Summary of the invention

The purpose of this utility model is for the heat exchange efficiency that improves the outdoor heat exchange system, reduce the outdoor construction amount, alleviate difficulty of construction and invent a kind of direct expansion formula geothermal heat pump air-conditioner unit.

The utility model is to realize by following technical scheme: direct expansion formula geothermal heat pump air-conditioner unit described in the utility model is by vapour liquid separator, compressor, four-way change-over valve, air-condition heat exchanger, geothermal heat exchanger, heating power expansion valve, recuperation of heat valve and device for drying and filtering are formed, vapor-liquid separation links to each other with compressor, compressor links to each other with four-way change-over valve, four-way change-over valve respectively with air-condition heat exchanger, geothermal heat exchanger, the recuperation of heat valve links to each other, air-condition heat exchanger passes through observer, device for drying and filtering, expansion valve links to each other with geothermal heat exchanger, and geothermal heat exchanger links to each other with vapour liquid separator by the recuperation of heat valve.

Can and connect a hot water heat exchanger between compressor and the four-way change-over valve.

Compare with " enclosed loop " ground resource heat pump with traditional " open type loop ", following advantage is arranged: system has less building block; Do not need pumped well and back water well; Do not need well water pump and circulating pump; Anhydrous heat exchanger, corresponding, there has not been the burn into of valve to freeze and damage.

Description of drawings

Fig. 1 is the utility model process of refrigerastion structure chart

Fig. 2 is that the utility model heats process structure diagram

Among the figure: 1 vapour liquid separator, 2 compressors, 3 four-way change-over valves

4 air-condition heat exchangers, 5 geothermal heat exchangers, 6 heating power expansion valves

7 recuperation of heat valves, 8 devices for drying and filtering, 9 liquid-sighting glass

10 hot water heat exchangers

The specific embodiment

Shown in Figure 2 as Fig. 1, direct expansion formula geothermal heat pump air-conditioner unit described in the utility model is by vapour liquid separator 1, compressor 2, four-way change-over valve 3, air-condition heat exchanger 4, geothermal heat exchanger 5, heating power expansion valve 6, recuperation of heat valve 7 and device for drying and filtering 8 are formed, vapour liquid separator 1 links to each other with compressor 2, compressor 2 links to each other with four-way change-over valve 3, four-way change-over valve 3 respectively with air-condition heat exchanger 4, geothermal heat exchanger 5, recuperation of heat valve 6 links to each other, air-condition heat exchanger is by observer 9, device for drying and filtering 8, expansion valve 6 links to each other with geothermal heat exchanger 5, and geothermal heat exchanger 5 links to each other with vapour liquid separator 1 by recuperation of heat valve 7.

Can and connect a hot water heat exchanger 10 between compressor 2 and the four-way change-over valve 3.

The course of work of the present utility model comprises process of refrigerastion and heats process.

Described process of refrigerastion is as follows:

Compressor 2 sucks low-temperature low-pressure refrigerant gas from vapour liquid separator 1, be compressed into the refrigerant liquid of HTHP, enter geothermal heat exchanger 5 by four-way change-over valve 3 then, release heat in geothermal heat exchanger 5, absorbed by soil, condensation of refrigerant becomes the liquid of cryogenic high pressure, the heating power expansion valve 6 of flowing through then, device for drying and filtering 8, liquid-sighting glass 9, throttling becomes low-temperature low-pressure refrigerant liquid, again by air-condition heat exchanger 4, heat in the absorption chamber makes recirculated water become the gas of low-temp low-pressure, the four-way change-over valve 3 of flowing through at last, gas-liquid separator 2 enters compressor 1.Cold-producing medium evaporates heat absorption in air-condition heat exchanger 4, reduced the temperature of room conditioning recirculated water, thereby has reduced the temperature in room, reaches the refrigeration purpose.

The described process that heats is as follows:

Compressor 2 sucks low-temperature low-pressure refrigerant gas from vapour liquid separator 1, be compressed into the refrigerant liquid of HTHP, enter air-condition heat exchanger 4 by four-way change-over valve then, release heat in air-condition heat exchanger 4, cold-producing medium then becomes the liquid of cryogenic high pressure, the liquid-sighting glass 9 of flowing through then, device for drying and filtering 8, heating power expansion valve 6, throttling becomes low-temperature low-pressure refrigerant liquid, enter the directly heat of evaporation absorption soil of geothermal heat exchanger 5, cold-producing medium becomes the gas of low-temp low-pressure, the recuperation of heat valve 7 of flowing through at last (guaranteeing the suction temperature and the pressure of compressor), four-way change-over valve 3, gas-liquid separator 1 enters compressor 2.Cold-producing medium is become the liquid of cryogenic high pressure by the liquid of HTHP in air-condition heat exchanger 4, release heat, and heat passed to room conditioning recirculated water, reach winter heating's purpose.

If must use the domestic hot water, valve A can be opened, B closes with valve, and the refrigerant liquid that is compressed into HTHP will flow to hot water heat exchanger 10 and heat release, just can obtain hot water.

Claims

1. direct expansion formula geothermal heat pump air-conditioner unit, it is characterized in that: direct expansion formula geothermal heat pump air-conditioner unit described in the utility model is by vapour liquid separator, compressor, four-way change-over valve, air-condition heat exchanger, geothermal heat exchanger, heating power expansion valve, recuperation of heat valve and device for drying and filtering are formed, vapor-liquid separation links to each other with compressor, compressor links to each other with four-way change-over valve, four-way change-over valve respectively with air-condition heat exchanger, geothermal heat exchanger, the recuperation of heat valve links to each other, air-condition heat exchanger passes through observer, device for drying and filtering, expansion valve links to each other with geothermal heat exchanger, and geothermal heat exchanger links to each other with vapour liquid separator by the recuperation of heat valve.

2. direct expansion formula geothermal heat pump air-conditioner unit according to claim 1 is characterized in that: can and connect a hot water heat exchanger between compressor and the four-way change-over valve.