CN202835956U - Refrigeration low load stable operation water source multiple on-line air conditioning system - Google Patents
Refrigeration low load stable operation water source multiple on-line air conditioning system Download PDFInfo
- Publication number
- CN202835956U CN202835956U CN2012205161788U CN201220516178U CN202835956U CN 202835956 U CN202835956 U CN 202835956U CN 2012205161788 U CN2012205161788 U CN 2012205161788U CN 201220516178 U CN201220516178 U CN 201220516178U CN 202835956 U CN202835956 U CN 202835956U
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- CN
- China
- Prior art keywords
- heat exchanger
- valve
- expansion valve
- water source
- air conditioning
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
A refrigeration low load stable operation water source multiple on-line air conditioning system comprises a compressor. An exhaust side of the compressor is communicated with a four-way valve. The system is characterized in that the four-way valve is communicated with an outdoor heat exchanger which is divided into two parts, each part is in series connection with a throttling component, and the outdoor heat exchanger is a plate heat exchanger or a sleeve heat exchanger. Each throttling component comprises an electronic expansion valve and a capillary tube, wherein the electronic expansion valve and the capillary tube are connected in parallel, a common end of two throttling components is connected with an indoor electronic expansion valve through a liquid valve, the indoor electronic expansion valve is connected with an indoor heat exchanger which is communicated with the four-way valve through an air valve, and the four-way valve is communicated with an air suction side of the compressor. Through the application of the system, the water source multiple on-line air conditioning system can maintain certain air suction exhaust pressure under the condition of low water entering temperature and small load refrigeration, and thus can continuously safely and stably operate.
Description
Technical field
The utility model relates to a kind of air-conditioning equipment, especially a kind of multi-online air-conditioning system.A kind of water source multi-connection air conditioning of the underload stable operation of freezing specifically.
Background technology
The water source multi-connection air conditioning of prior art; when freeze little load operation and inflow temperature are low; the pressure at expulsion of unit can be very low; the pressure of inspiration(Pi) of system decreases; can cause frequently low-voltage variation of multi-connected machine system, be unfavorable for the continual and steady operation of unit, and because unit height pressure reduction is less; lubricating oil can't return after discharging compressor smoothly, finally can be so that compressor oil starvation and damaging.
Summary of the invention
The purpose of this utility model is for existing water source multi-connection air conditioning; when freeze little load operation and inflow temperature are low; the pressure at expulsion of unit can be very low; can cause occurring frequently low-voltage variation; do not utilize the problem of system stable operation; design and a kind ofly can under low water temperature, little load condition, guarantee certain Suck and exhaust pressure, thereby so that unit continues to safely and steadily run the water source multi-connection air conditioning of refrigeration underload stable operation.
A kind of water source multi-connection air conditioning of the underload stable operation of freezing, comprise compressor 1, an inlet end of compressor air-discharging side and cross valve 2 links, the public inlet end that it is characterized in that two outdoor heat exchangers 3 of outlet side of described cross valve 2 and parallel connection links, the outlet side of each outdoor heat exchanger 3 all is in series with an orifice union 4, described orifice union 4 is comprised of electric expansion valve 5 and capillary 6, electric expansion valve 5 is connected in parallel with capillary 6, the common port of two orifice unions 4 is connected with indoor electronic expansion valve 8 by liquid valve 7, indoor electronic expansion valve 8 is connected with the air inlet side of some indoor heat exchangers that are connected in parallel 9, the side of giving vent to anger of each indoor heat exchanger 9 all links by the end that refluxes of air valve 10 with cross valve 2, and another of cross valve 2 refluxes to hold with suction side and link.
Described outdoor heat exchanger 3 is double-tube heat exchanger or plate type heat exchanger.
The heat exchange area of the regulation and control conditioning chamber external heat exchanger 3 by electric expansion valve 5.
Of the present utility model producing effect is:
The utility model can so that water source multi-connection air conditioning in the situation of low inflow temperature, little load refrigeration, can keep certain Suck and exhaust pressure, thereby continue to safely and steadily run.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: 1-compressor, 2-cross valve, 3-outdoor heat exchanger, 4-orifice union, 5-electric expansion valve, 6-capillary, 7-liquid valve, 8-indoor electronic expansion valve, 9-indoor heat exchanger, 10-air valve.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
As shown in Figure 1.
A kind of water source multi-connection air conditioning of the underload stable operation of freezing, comprise compressor 1, compressor air-discharging side and cross valve 2 link, but cross valve 2 and outdoor heat exchanger 3(double-tube heat exchanger or plate type heat exchanger) UNICOM, outdoor heat exchanger 3 is divided into two parts, every part orifice union 4 of all connecting, described outdoor heat exchanger 3 is plate type heat exchanger or double-tube heat exchanger, described orifice union 4 comprises electric expansion valve 5, capillary 6, wherein electric expansion valve 5 is connected in parallel with capillary 6, the electric expansion valve 5 of two orifice unions 4 and capillary 6 each two, the common port of two orifice unions 4 is connected with indoor electronic expansion valve 8 by liquid valve 7, indoor electronic expansion valve 8 is connected with indoor heat exchanger 9, indoor heat exchanger 9 is by air valve 10 and cross valve 2 UNICOMs, and cross valve 2 links with suction side.
In the refrigeration underrun, in the low inflow temperature situation, the unit pressure at expulsion can significantly reduce, and causes compression ratio excessively low, and may cause the frequent start-stop of unit this moment, and the oil return difficulty, finally damages unit.For guaranteeing under this operating mode, water source combined air conditioners unit can continue to safely and steadily run, the utility model improves pressure at expulsion by the area that reduces outdoor heat exchanger 3, and then raising pressure of inspiration(Pi), guarantee unit safety operation, the heat exchange area of the regulation and control conditioning chamber external heat exchanger 3 by electric expansion valve 5.
The major control principle is as follows:
When pressure at expulsion＜P1, close an electric expansion valve 5, the discharge superheat of another electric expansion valve 5 regulating systems;
When pressure at expulsion〉P2 (P2〉P1) time, open the electric expansion valve 5 of closing, adjust the aperture of valve according to the discharge superheat of system.
In addition, the effect of capillary 6 mainly is to prevent that refrigerant from assembling with liquid form after the condensation in outdoor heat exchanger 3 in the utility model, causes system's refrigerant circulation to reduce, and Suck and exhaust pressure further reduces, and lubricating oil can't turn back to compressor.
Certainly, protection domain of the present utility model is not limited to above-described embodiment, so long as those of ordinary skill in the art is through creatively improving, and just should be in protection domain of the present utility model.
Claims (3)
1. water source multi-connection air conditioning of underload stable operation that freezes, comprise compressor (1), an inlet end of compressor air-discharging side and cross valve (2) links, the public inlet end that it is characterized in that two outdoor heat exchangers (3) of outlet side of described cross valve (2) and parallel connection links, the outlet side of each outdoor heat exchanger (3) all is in series with an orifice union (4), described orifice union (4) is comprised of electric expansion valve (5) and capillary (6), electric expansion valve (5) is connected in parallel with capillary (6), the common port of two orifice unions (4) is connected with indoor electronic expansion valve (8) by liquid valve (7), indoor electronic expansion valve (8) is connected with the air inlet side of some indoor heat exchangers that are connected in parallel (9), the side of giving vent to anger of each indoor heat exchanger (9) all links by the end that refluxes of air valve (10) with cross valve (2), and another of cross valve (2) refluxes to hold with suction side and link.
2. the water source multi-connection air conditioning of refrigeration underload according to claim 1 stable operation, it is characterized in that: described outdoor heat exchanger (3) is double-tube heat exchanger or plate type heat exchanger.
3. the water source multi-connection air conditioning of refrigeration underload according to claim 1 and 2 stable operation is characterized in that: the heat exchange area of the regulation and control conditioning chamber external heat exchanger (3) by electric expansion valve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205161788U CN202835956U (en) | 2012-10-10 | 2012-10-10 | Refrigeration low load stable operation water source multiple on-line air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205161788U CN202835956U (en) | 2012-10-10 | 2012-10-10 | Refrigeration low load stable operation water source multiple on-line air conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202835956U true CN202835956U (en) | 2013-03-27 |
Family
ID=47947646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205161788U Expired - Lifetime CN202835956U (en) | 2012-10-10 | 2012-10-10 | Refrigeration low load stable operation water source multiple on-line air conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202835956U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456739A (en) * | 2014-12-26 | 2015-03-25 | 珠海格力电器股份有限公司 | Air conditioning system and control method |
| CN110925872A (en) * | 2019-11-04 | 2020-03-27 | 南京天加环境科技有限公司 | Direct-expansion air conditioning system capable of being operated at ultralow temperature |
-
2012
- 2012-10-10 CN CN2012205161788U patent/CN202835956U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456739A (en) * | 2014-12-26 | 2015-03-25 | 珠海格力电器股份有限公司 | Air conditioning system and control method |
| CN104456739B (en) * | 2014-12-26 | 2017-03-01 | 珠海格力电器股份有限公司 | Air conditioning system and control method |
| CN110925872A (en) * | 2019-11-04 | 2020-03-27 | 南京天加环境科技有限公司 | Direct-expansion air conditioning system capable of being operated at ultralow temperature |
| WO2021088355A1 (en) * | 2019-11-04 | 2021-05-14 | 南京天加环境科技有限公司 | Direct-expansion air-conditioning system capable of performing ultralow-temperature cooling operation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |