CN107196462A - Centrifugal water chilling unit, central air conditioner and condensation preventing method - Google Patents
Centrifugal water chilling unit, central air conditioner and condensation preventing method Download PDFInfo
- Publication number
- CN107196462A CN107196462A CN201710580088.2A CN201710580088A CN107196462A CN 107196462 A CN107196462 A CN 107196462A CN 201710580088 A CN201710580088 A CN 201710580088A CN 107196462 A CN107196462 A CN 107196462A
- Authority
- CN
- China
- Prior art keywords
- pressure
- regulating valve
- housing
- evaporator
- refrigerating machines
- Prior art date
- 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.)
- Granted
Links
- 230000005494 condensation Effects 0.000 title claims abstract description 21
- 238000009833 condensation Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 8
- 238000004378 air conditioning Methods 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 abstract description 12
- 230000001105 regulatory effect Effects 0.000 abstract description 11
- 230000008020 evaporation Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000007921 spray Substances 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a centrifugal chiller, a central air conditioner and a condensation preventing method, relates to the field of air conditioners, and aims to reduce the probability of condensation of a motor of the centrifugal chiller. The centrifugal water chilling unit comprises a motor, an evaporator and a pressure regulating valve; and a pressure regulating valve is arranged between the outlet of the shell of the motor and the inlet of the evaporator. Wherein the pressure regulating valve communicates the outlet with the inlet when the pressure within the housing is greater than the pressure within the evaporator; the pressure regulating valve disconnects the outlet from the inlet when the pressure within the housing is less than or equal to the pressure within the evaporator. According to the technical scheme provided by the embodiment of the invention, when the evaporation pressure of the spray liquid in the shell of the motor rises to a set value, the pressure regulating valve is opened, so that the possibility of condensation can be reduced.
Description
Technical field
The present invention relates to field of air conditioning, and in particular to a kind of centrifugal refrigerating machines, central air-conditioning and dewing-proof method.
Background technology
Centrifugal refrigerating machines being used Large Central Air Conditioning System cooling-water machine, centrifugal refrigerating machines are mainly by centrifugal compressor more
Machine, main motor, condenser (water cooling shell-tube type), evaporator (full liquid horizontal shell and tube type), throttling arrangement, suction port of compressor energy
Governor motion, lubricating oil system, main motor hydrojet evaporative cooling system etc. are constituted.
Inventor has found, at least there are following problems in the prior art：Cooling side is evaporated using hydrojet for main motor
The unit of formula, often because hydrojet evaporating temperature is relatively low, causes motor hull-skin temperature to be significantly less than in environment temperature, air and presss from both sides
The steam of band can condense under low-temperature condition in motor surfaces, cause motor condensation serious, condensation directly contributes motor
The failures such as electrical wiring short circuit, damage motor.
The content of the invention
One of purpose of the present invention is to propose a kind of centrifugal refrigerating machines, central air-conditioning and dewing-proof method, is used
There is the probability of condensation to reduce the motor of centrifugal refrigerating machines.
To achieve the above object, the invention provides following technical scheme：
The invention provides a kind of centrifugal refrigerating machines, including motor, evaporator and pressure-regulating valve；It is described electronic
Pressure-regulating valve is provided between the entrance of the housing outlets of machine and the evaporator；
Wherein, when the pressure in the housing is more than the pressure in the evaporator, the pressure-regulating valve turns on institute
State outlet and the entrance；When the pressure in the housing is less than or equal to the pressure in the evaporator, the pressure is adjusted
Save valve and disconnect the outlet and the entrance.
In an alternate embodiment of the invention, the pressure that the pressure-regulating valve is configured in the housing is more than the evaporation
Pressure in device when causing and not producing dew condensation phenomenon in the housing to open.
In an alternate embodiment of the invention, the pressure-regulating valve located at the outlet and the entrance of the evaporator of the housing it
Between muffler on.
In an alternate embodiment of the invention, the Opening pressure of the pressure-regulating valve can be continuously adjusted.
In an alternate embodiment of the invention, the Opening pressure energy ladder regulation of the pressure-regulating valve.
In an alternate embodiment of the invention, centrifugal refrigerating machines also include controller, and the controller is adjusted with the pressure
Valve is connected, and the pressure that the controller is used in the housing opens the pressure-regulating valve when being more than threshold value.
In an alternate embodiment of the invention, the pressure-regulating valve includes magnetic valve, the controller and the pressure-regulating valve
Electrical connection.
A kind of central air-conditioning of another embodiment of the present invention offer, including any technical scheme offer of the invention are centrifugal cold
Water dispenser group.
Another embodiment of the present invention also provides a kind of centrifugal refrigerating machines centrifugal compressor dewing-proof method, including following
Step：
Detect the pressure in centrifugal refrigerating machines motor case body；
When the pressure in the housing is more than the pressure in the evaporator, outlet and the evaporator of the housing are opened
Entrance between pressure-regulating valve, with turn on it is described outlet with the entrance.
In an alternate embodiment of the invention, the pressure in the housing is more than the pressure in the evaporator to cause the shell
When not producing dew condensation phenomenon in vivo, the pressure-regulating valve is opened.
Based on above-mentioned technical proposal, the embodiment of the present invention can at least produce following technique effect：
Technical scheme provided in an embodiment of the present invention, in housing outlets (i.e. motor cooling gas returning port) and the steaming of motor
Increase pressure-regulating valve between the outlet for sending out device, it act as：By the unlatching setting value for adjusting pressure-regulating valve so that in valve
Inlet pressure when rising, when hydrojet evaporating pressure rises to setting value in the housing of such as motor, pressure-regulating valve can just be beaten
Open.The evaporating pressure of motor hydrojet is so allowed for higher than the pressure in evaporator, the pressure and temperature in two-phase section is present pair
It should be related to, thus improve the evaporating temperature value of motor hydrojet so that the temperature on motor surface is unlikely to too lowly cooled, reduction
There is the possibility of condensation.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is centrifugal refrigerating machines principle schematic provided in an embodiment of the present invention.
Reference：
1st, motor；2nd, evaporator；3rd, pressure-regulating valve；4th, compressor；5th, condenser；6th, choke valve；7th, cooling throttling
Valve；8th, filter；9th, muffler；11st, housing；12nd, export；21st, entrance；41st, entry guide vane；42nd, impeller.
Embodiment
Illustrated in more detail with reference to Fig. 1 technical schemes provided the present invention.
Referring to Fig. 1, the embodiment of the present invention provides a kind of centrifugal refrigerating machines, including motor 1, evaporator 2 and pressure
Regulating valve 3.The housing 11 of motor 1 is exported is provided with pressure-regulating valve 3 between the entrance of evaporator 2.Wherein, when in housing 11
Pressure when being more than the pressure in evaporator 2, the entrance 21 of outlet 12 and the evaporator 2 of the conducting housing 11 of pressure-regulating valve 3.When
When pressure in housing 11 is less than or equal to the pressure in evaporator 2, pressure-regulating valve 3 disconnects the outlet of housing 11 and evaporator 2
Entrance 21.
Pressure-regulating valve 3 is a kind of adjustable valve of itself Opening pressure, and a kind of structure type is in the course of the work may be used
Its Opening pressure is adjusted, such as is opened by controller according to required pressure value；Another way is adjusted before work
Its pressure, after being installed in system, what its Opening pressure was just to determine.The former adjusts more flexible, and the latter's control is more simple
Just.
Further, pressure-regulating valve 3 is configured to the pressure in housing 11 more than the pressure in evaporator 2 to cause
Opened when not producing dew condensation phenomenon in housing 11.The Opening pressure of pressure-regulating valve 3 can be arranged as required to, such as than evaporation
Opened during the big 50pa of pressure in device 2.
Referring to Fig. 1, further, muffler 9, pressure are provided between the outlet 12 of housing 11 and the entrance 21 of evaporator 2
Regulating valve 3 is on the muffler 9 between the outlet of housing 11 and the entrance of evaporator 2.Pressure-regulating valve 3 is opened, then is turned on
Muffler 9；Pressure-regulating valve 3 is closed, then disconnects muffler 9.
Alternatively, the Opening pressure of pressure-regulating valve 3 can be continuously adjusted, and so be controlled more accurate.
Or, the Opening pressure energy ladder regulation of pressure-regulating valve 3.Such as pressure-regulating valve 3 only reaches setting in pressure
Threshold value when open.
Alternatively, centrifugal refrigerating machines also include controller, and controller is connected with pressure-regulating valve 3, and controller is used for
Opening pressure regulating valve when pressure in housing 11 is more than threshold value.By controller, pressure tune can be easily opened or closed
Valve 3 is saved, centrifugal refrigerating machines automatic controlling level is improved.
Alternatively, pressure-regulating valve 3 includes magnetic valve, and controller is electrically connected with pressure-regulating valve 3.Controller can be used
PLC, magnetic valve is easy to control.
Centrifugal refrigerating machines are discussed in detail with reference to Fig. 1.
Referring to Fig. 1, centrifugal refrigerating machines are the refrigeration system with motor hydrojet evaporative cooling system, and it includes compression
Machine 4, motor 1, condenser 5, choke valve 6, evaporator 2, filter 8, motor cooling choke valve 7 and pressure-regulating valve 3.It is electronic
Machine 1 is used for the impeller 42 for driving compressor 4, and side where the winding of motor 1 and the place side of entry guide vane 41 of compressor 4 are phases
It is mutually airtight to separate.Compressor 4, condenser 5, choke valve 6, evaporator 2 are sequentially connected.
Refrigeration system circulation operation principle is as follows：The high temperature and high pressure gas that compressor 4 is discharged reach condensation by blast pipe
Device 5, the liquid of cryogenic high pressure is condensed into the bottom of condenser 5, throttles into the two-phase gas of low-pressure low-temperature by choke valve 6 afterwards
Liquid；Evaporated subsequently into evaporator 2, low-pressure gas returns to compressor 4.
Main motor hydrojet evaporative cooling system operation principle is as follows：The bottom cryogenic high pressure refrigerant liquid of condenser 5 via
Filter 8 is filtered, by saturated liquid of cooling choke valve 7 throttling of motor 1 for low-temp low-pressure, spray to main motor 1
On winding, liquid takes away heat in the inside evaporation endothermic of housing 11, and boil-off gas enters evaporator 2, motor 1 is reached cooling
Effect.There is corresponding relation between the temperature and pressure of saturated liquid.
Usually motor hydrojet muffler 9 is directly connected with evaporator 2, the hydrojet evaporation in the housing 11 of motor 1
Pressure of the pressure just and in evaporator 2 is equal, and the evaporating temperature in flooded evaporator is generally 5 DEG C；If being not provided with pressure tune
Save valve 3, then the evaporating temperature in the housing of motor 1 is also 5 DEG C, the relatively low generation condensation of temperature.The embodiment of the present invention sets pressure
After force regulating valve 3, the housing 11 of motor 1 can just be separated with the housing of evaporator 2, to cause both pressure different.For
Probability that reduction dew condensation phenomenon occurs, dew condensation phenomenon is even prevented, the Opening pressure of pressure-regulating valve 3 can be set
Enough to height.
A kind of central air-conditioning of another embodiment of the present invention offer, including any technical scheme offer of the invention are centrifugal cold
Water dispenser group.
Central air-conditioning includes water system, wind system and above-mentioned handpiece Water Chilling Units, and handpiece Water Chilling Units are used to produce low-temperature receiver.
Another embodiment of the present invention also provides a kind of centrifugal refrigerating machines centrifugal compressor dewing-proof method, and it can be used
The centrifugal refrigerating machines that any of the above-described embodiment is provided are realized.This method comprises the following steps：
Step 1: the pressure in the housing 11 of detection centrifugal refrigerating machines motor 1, to judge whether to need to open pressure
Force regulating valve 3.
Step 2: when the pressure in housing 11 is more than the pressure in evaporator 2, opening the outlet 12 and evaporation of housing 11
Pressure-regulating valve between the entrance 21 of device 2, to turn on the outlet 12 of housing 11 and the entrance 21 of evaporator 2.
To prevent dew condensation phenomenon, the pressure in housing 11 is more than the pressure in evaporator 2 to cause in housing 11
When not producing dew condensation phenomenon, Opening pressure regulating valve 3.
For the unit of setting, what its dew-point temperature was to determine, its corresponding pressure is also to learn, therefore can be with pin
Pair determine unit set determine pressure-regulating valve opening temperature.
Above-mentioned technical proposal, can reduce centrifugal compressor electric motor and the probability of condensation occur, it might even be possible to which realization is prevented
Centrifugal compressor electric motor condensation occurs, and ensures main motor safety, improves unit operation reliability.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown is only for ease of the description present invention and simplifies description, rather than indicates or infer the device of meaning
Or element must have specific orientation, be specific azimuth configuration and operation, thus it is not intended that in present invention protection
The limitation of appearance.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic,
But these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of centrifugal refrigerating machines, it is characterised in that including motor (1), evaporator (2) and pressure-regulating valve (3)；Institute
State and pressure-regulating valve is provided between the outlet (12) of the housing (11) of motor (1) and the entrance (21) of the evaporator (2)
(3)；
Wherein, when the pressure in the housing (11) is more than the pressure in the evaporator (2), the pressure-regulating valve (3)
The conducting outlet (12) and the entrance (21)；When the pressure in the housing (11) is less than or equal to the evaporator (2)
During interior pressure, the pressure-regulating valve (3) disconnects the outlet (12) and the entrance (21).
2. centrifugal refrigerating machines according to claim 1, it is characterised in that the pressure-regulating valve (3) is configured to
Pressure in the housing (11) is more than the pressure in the evaporator (2) not produce condensation in the housing (11)
Opened during phenomenon.
3. centrifugal refrigerating machines according to claim 1, it is characterised in that the pressure-regulating valve (3) is located at described
On muffler (9) between the outlet (12) of housing (11) and the entrance (21) of the evaporator (2).
4. centrifugal refrigerating machines according to claim 1, it is characterised in that the unlatching pressure of the pressure-regulating valve (3)
Power can be continuously adjusted.
5. centrifugal refrigerating machines according to claim 1, it is characterised in that the unlatching pressure of the pressure-regulating valve (3)
Power energy ladder is adjusted.
6. centrifugal refrigerating machines according to claim 1, it is characterised in that also including controller, the controller with
Pressure-regulating valve (3) connection, the pressure that the controller is used in the housing (11) opens described when being more than threshold value
Pressure-regulating valve (3).
7. centrifugal refrigerating machines according to claim 6, it is characterised in that the pressure-regulating valve (3) includes electromagnetism
Valve, the controller is electrically connected with the pressure-regulating valve (3).
8. a kind of central air-conditioning, it is characterised in that including any described centrifugal refrigerating machines of claim 1-7.
9. a kind of centrifugal refrigerating machines centrifugal compressor dewing-proof method, it is characterised in that comprise the following steps：
Detect the pressure in centrifugal refrigerating machines motor case body；
When the pressure in the housing is more than the pressure in the evaporator, the outlet of the housing and entering for evaporator are opened
Pressure-regulating valve between mouthful, to turn on the outlet and the entrance.
10. centrifugal refrigerating machines centrifugal compressor dewing-proof method according to claim 9, it is characterised in that in institute
When stating pressure that pressure in housing is more than in the evaporator with so that not producing dew condensation phenomenon in the housing, open described
Pressure-regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710580088.2A CN107196462B (en) | 2017-07-17 | 2017-07-17 | Centrifugal water chilling unit, central air conditioner and condensation prevention method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710580088.2A CN107196462B (en) | 2017-07-17 | 2017-07-17 | Centrifugal water chilling unit, central air conditioner and condensation prevention method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107196462A true CN107196462A (en) | 2017-09-22 |
| CN107196462B CN107196462B (en) | 2024-01-19 |
Family
ID=59883703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710580088.2A Active CN107196462B (en) | 2017-07-17 | 2017-07-17 | Centrifugal water chilling unit, central air conditioner and condensation prevention method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107196462B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4178091A1 (en) * | 2021-11-05 | 2023-05-10 | Hamilton Sundstrand Corporation | Aircraft electric motor |
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| JPH0363461A (en) * | 1989-07-31 | 1991-03-19 | Hitachi Ltd | Overheat protecting method for set capacity type compressor |
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| US3112618A (en) * | 1960-06-15 | 1963-12-03 | American Radiator & Standard | Cooling means for refrigerant compressor motors |
| JPH0363461A (en) * | 1989-07-31 | 1991-03-19 | Hitachi Ltd | Overheat protecting method for set capacity type compressor |
| JPH10292948A (en) * | 1997-04-17 | 1998-11-04 | Mitsubishi Heavy Ind Ltd | Refrigerator |
| JP2002005024A (en) * | 2000-04-19 | 2002-01-09 | Denso Corp | Electric compressor integrated with motor driving circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4178091A1 (en) * | 2021-11-05 | 2023-05-10 | Hamilton Sundstrand Corporation | Aircraft electric motor |
| US11817761B2 (en) | 2021-11-05 | 2023-11-14 | Hamilton Sundstrand Corporation | Aircraft electric motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107196462B (en) | 2024-01-19 |
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