CN105352238B - Evaporator with heat pump heat exchange abnormality judgment method, evaporator with heat pump and hot water machine - Google Patents
Evaporator with heat pump heat exchange abnormality judgment method, evaporator with heat pump and hot water machine Download PDFInfo
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- CN105352238B CN105352238B CN201510799435.1A CN201510799435A CN105352238B CN 105352238 B CN105352238 B CN 105352238B CN 201510799435 A CN201510799435 A CN 201510799435A CN 105352238 B CN105352238 B CN 105352238B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000005856 abnormality Effects 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 230000002159 abnormal effect Effects 0.000 claims abstract description 24
- 238000010977 unit operation Methods 0.000 claims abstract description 14
- 239000000428 dust Substances 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
Abstract
The invention discloses a kind of evaporator with heat pump heat exchange abnormality judgment method, the evaporator and hot water machines, judgment method is to measure environment temperature under evaporator operation, electric expansion valve step number, evaporator to enter tube temperature degree, outlet pipe temperature, inflow temperature and defrost situation, according under different environment temperatures, it is compared or analyzes with respective setting value in conjunction with one or more of electric expansion valve step number, the defrost situation for entering tube temperature angle value, outlet pipe temperature value, inflow temperature value and heat pump, judge whether the evaporator exchanges heat exception.Using the evaporator with heat pump and hot water machine of evaporator with heat pump heat exchange abnormality judgment method, with abnormal prompt can be issued the user in time, remind user's timely processing, it avoids not finding that heat exchange is abnormal in time due to, the worry that user checks evaporator can be saved simultaneously, ensure that unit operation is more safe and reliable energy saving.
Description
Technical field
The present invention relates to evaporator heat exchange technical field, especially a kind of evaporator with heat pump heat exchange abnormality judgment method, heat
Pump evaporator and hot water machine.
Background technology
Evaporator is gas and the most widely used a kind of heat transmission equipment in liquid heat exchanger.It is as hot water owner
Heat exchanger components, evaporator (especially finned evaporator) are wanted to be directly exposed in air when using, be easy to be stained with dust, it is different
The air quality in place is different, and the speed of the bonding dust of evaporator surface also differs, when evaporator surface sticks dust, or
Since units' installation is too near to wall, or when thering is foreign matter to shelter from evaporator, the exchange capability of heat of evaporator can be all reduced.
Currently, judging evaporator heat exchange exception, field observation is periodically mainly arrived by technical staff, confirms evaporator table
The dust thickness that face is stained with, it is determined whether it needs to clean evaporator, the method is simply direct, but cumbersome, and
It, can be in a short time just to evaporation if during unit operation, thering is foreign matter (polybag, leatheroid etc.) to be blown in evaporator suddenly
The case where heat transfer effect of device produces bigger effect, and this foreign matter blocks is not easy to be found.
In conclusion needing a kind of method, the heat exchange situation of evaporator can be automatically judged, if there is exception,
To remind user to clean or clear up evaporator surface dust or the foreign matter blocked.
Invention content
The technical problem to be solved in the present invention be to overcome the deficiencies of the prior art and provide one kind can automatic decision heat pump steam
Send out judgment method, heat-pump-type evaporator and the hot water machine of device heat exchange situation.
In order to solve the above technical problems, the present invention is using the basic conception of technical solution：
On the one hand, it the present invention provides a kind of evaporator with heat pump heat exchange abnormality judgment method, measures under evaporator operation
Environment temperature, electric expansion valve step number, evaporator enter tube temperature degree, outlet pipe temperature, inflow temperature and defrost situation, according to
Under different environment temperatures, in conjunction with electric expansion valve step number, enter tube temperature angle value, outlet pipe temperature value, inflow temperature value and heat
One or more of defrost situation of pump is compared or analyzes with respective setting value, judges that the evaporator is
No heat exchange is abnormal.
Further, when environment temperature is greater than or equal to the second predetermined temperature, by judging electric expansion valve step number, steaming
Hair device enters tube temperature degree, outlet pipe temperature, inflow temperature, and judgement show whether evaporator exchanges heat exception；And/or
When environment temperature is less than the second predetermined temperature, by judging defrost situation, judge whether the evaporator exchanges heat
It is abnormal.
Further, when environment temperature is greater than or equal to the first predetermined temperature, it is predetermined that electric expansion valve step number is less than first
Step number, judgement evaporator heat exchange are abnormal；
When environment temperature is greater than or equal to the second predetermined temperature and is less than the first predetermined temperature, electric expansion valve step number is less than
Or it is equal to the second predetermined step number, and the tube temperature degree that enters of evaporator is more than predetermined temperature difference with outlet pipe temperature difference, then judges evaporator
Heat exchange is abnormal；
When environment temperature is greater than or equal to third predetermined temperature and is less than the second predetermined temperature, it is existing that defrost occurs in unit
As then judging evaporator heat exchange exception；
When environment temperature is less than third predetermined temperature, the unit operation time enters defrost less than the first predetermined time,
And the defrost time was less than for the second predetermined time, then judged evaporator heat exchange exception；Wherein,
Further, first predetermined temperature is 32 DEG C or more, and second predetermined temperature is 20 DEG C or more, described the
Three predetermined temperatures are 7 DEG C or more, and the first predetermined step number is 200, and the second predetermined step number is 140, the predetermined temperature
Difference is 5 DEG C, and the first predetermined time was 20min, and the second predetermined time was 1min.
Further,
When environment temperature be greater than or equal to the first predetermined temperature,
The step number of electric expansion valve is less than the first predetermined step number, and is greater than or equal to the second predetermined step number, then it represents that low temperature
It will appear security risk when operation, need timely clean expander surface,
The step number of electric expansion valve is equal to the second step number, and after expression needs clean expander surface, could be switched on operation,
If adjacent judge twice, the step number of electric expansion valve by be more than or equal to the first predetermined step number jump directly to be less than or
Equal to the second predetermined step number, then judge that evaporator surface has foreign matter to block；
When environment temperature be less than the first predetermined temperature, and be greater than or equal to the second predetermined temperature,
If in the preset range time, under same operational mode, inflow temperature deviation is within 5 DEG C, and at a temperature of entering pipe
10 DEG C of drop or more, then evaporator surface has foreign matter to block in the previous hour of judgement；
When environment temperature be less than the second predetermined temperature, and be greater than or equal to third predetermined temperature,
If defrost phenomenon does not occur in preceding primary judgement, existing defrost phenomenon is once judged afterwards, then judges evaporator table
Face has foreign matter to block；
When environment temperature be less than third predetermined temperature,
If a preceding unit operation is normal, then heating operation time be less than for the first predetermined time, and when defrost
Between be less than the second predetermined time, then judge that evaporator has foreign matter to block.
Further, the operational mode includes directly-heated pattern and circulation pattern.
Further, the preset range time is 1 hour.
Further, when environment temperature is greater than or equal to the first predetermined temperature, electric expansion valve step number is greater than or equal to the
One predetermined step number, and it is less than the predetermined step number of third, then it represents that evaporator surface is stained with dust or has foreign matter to block evaporator, but machine
Group remains to normal operation；
If adjacent judge twice, the step number of electric expansion valve, which is jumped directly to by being greater than or equal to the predetermined step number of third, to be less than
First predetermined step number then judges that evaporator surface has foreign matter to block；
Wherein, the predetermined step number of the third is 380 steps or more.
Further, when environment temperature is greater than or equal to third predetermined temperature, after the compressor start third predetermined time
Start to judge, and judges once every the third predetermined time.
Further, when environment temperature is greater than or equal to the second predetermined temperature and less than the first predetermined temperature, judges every time
Shi Jilu judging results, enter tube temperature degree and outlet pipe temperature at the time.
Further, the third predetermined time is 30min.
Further, when environment temperature is less than third predetermined temperature, start timing, record unit heating after compressor start
Run time, defrost time.
Further, when judging result is evaporator heat exchange exception, evaporator surface is checked, surface is removed
Dust or foreign matter.
On the other hand, it the present invention also provides a kind of evaporator with heat pump, adopts and judges thermo-compression evaporation with the aforedescribed process
Device heat exchange is abnormal.
Further, the evaporator with heat pump is finned evaporator.
On the other hand, the present invention also provides a kind of hot water machines comprising above-mentioned evaporator with heat pump.
After adopting the above technical scheme, the present invention has the advantages that compared with prior art：
Electric expansion valve step number when the embodiment of the present invention is by measuring varying environment temperature enters tube temperature degree and goes out tube temperature
Degree, defrost time etc. judge whether evaporator exchanges heat exception, to issue the user with abnormal prompt in time, remind user timely
Processing avoids not finding that heat exchange is abnormal in time due to, while can save the worry that user checks evaporator, ensures unit operation
It is more safe and reliable energy saving.
Further, by the changed speed of electric expansion valve step number, inflow temperature difference and enter pipe temperature difference etc., sentence
Whether disconnected evaporator has foreign matter to block, and avoiding generation evaporator from blocking causes heat exchange difficult, is indicated extremely in more detail to user
Or prompt.
The specific implementation mode of the present invention is described in further detail with reference to embodiment.
Specific implementation mode
It is of the invention to reach the technological means and effect that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Specific implementation mode, structure, feature and its effect applied according to the present invention is described in detail as after in preferred embodiment.Under
State it is bright in, what different " embodiment " or " embodiment " referred to is not necessarily the same embodiment.In addition, one or more embodiments
In special characteristic, structure or feature can be combined by any suitable form.
A kind of evaporator with heat pump heat exchange abnormality judgment method provided by the invention, measures the environment temperature under evaporator operation
Degree, electric expansion valve step number, evaporator enter that tube temperature degree, outlet pipe temperature, (inflow temperature preferably refers to evaporator to inflow temperature
The temperature of a certain branch (i.e. liquid-dividing head is exported to evaporator)) and defrost situation, according under different environment temperatures, then
In conjunction with electric expansion valve step number, enter one or more of tube temperature angle value and the defrost situation of heat pump and respective setting
Value is compared or analyzes, and judges whether the evaporator exchanges heat exception.It is right after judging that heat exchange exception occurs for evaporator
Evaporator is checked, dust and the sundries on surface etc. are removed, so that the operation that evaporator is more stable.It avoids due to cannot be timely
It was found that equipment fault caused by evaporator heat exchange exception, can also reduce the extra charge that personnel's periodical inspection inspection is brought.
Preferably, when environment temperature is greater than or equal to the second predetermined temperature, by judging electric expansion valve step number, evaporation
Device enters tube temperature degree, outlet pipe temperature, inflow temperature, and judgement show whether evaporator exchanges heat exception；When environment temperature is less than second
When predetermined temperature, by judging defrost situation, judge whether the evaporator exchanges heat exception.
Embodiment 1
Present embodiments provide a kind of evaporator with heat pump heat exchange abnormality judgment method comprising：
When environment temperature is greater than or equal to the first predetermined temperature, electric expansion valve step number is less than the first predetermined step number, judgement
Evaporator heat exchange is abnormal；
When environment temperature is greater than or equal to the second predetermined temperature and is less than the first predetermined temperature, electric expansion valve step number is less than
Or it is equal to the second predetermined step number, and the tube temperature degree that enters of evaporator is more than predetermined temperature difference with outlet pipe temperature difference, then judges evaporator
Heat exchange is abnormal；
When environment temperature is greater than or equal to third predetermined temperature and is less than the second predetermined temperature, it is existing that defrost occurs in unit
As then judging evaporator heat exchange exception；
When environment temperature is less than third predetermined temperature, the unit operation time enters defrost less than the first predetermined time,
And the defrost time was less than for the second predetermined time, then judged evaporator heat exchange exception；Wherein,
First predetermined temperature is 32 DEG C or more (preferably 35 DEG C), and second predetermined temperature is 20 DEG C or more (excellent
It is selected as 20 DEG C), the third predetermined temperature is 7 DEG C or more (preferably 10 DEG C), and the first predetermined step number is 200, described the
Two predetermined step numbers are 140, and the predetermined temperature difference is 5 DEG C, and the first predetermined time was 20min, and the second predetermined time was 1min.
The evaporator with heat pump heat exchange abnormality judgment method that the present embodiment is provided, can judge the heat exchange of evaporator in time
It is abnormal, avoid because it is found that heat exchange caused by not in time is difficult, so as to cause equipment operation failure.
Preferably, when environment temperature is less than third predetermined temperature, start timing, record unit heating fortune after compressor start
Row time, defrost time.Herein record and in time be for convenience dust is sticked to the evaporator surface under the environment temperature
More accuracy is carried out with shelter to judge.
Embodiment 2
On the basis of the tangible embodiment of the present embodiment 1, the situation of heat exchanging device exception carried out it is further distinguish in detail,
In order to which user carries out different processing for different situations.Specifically：
When environment temperature be greater than or equal to the first predetermined temperature,
The step number of electric expansion valve is less than the first predetermined step number, and is greater than or equal to the second predetermined step number, then it represents that low temperature
Will appear security risk when operation, need timely clean expander surface, at this point, need not clean expander surface immediately, should
Prompting, which illustrates only, is possible to occur security risk, and equipment is still in normal operation, as long as arranging time progress nearby clear
Reason.
The step number of electric expansion valve is equal to the second step number, and after expression needs clean expander surface, could be switched on operation, this
Under state, evaporator surface dust or shelter serious shielding, equipment should be closed immediately, and need to carry out evaporator surface
After cleaning, run in booting.
If adjacent judge twice, the step number of electric expansion valve by be more than or equal to the first predetermined step number jump directly to be less than or
Equal to the second predetermined step number, then judge that evaporator surface has foreign matter to block, it under this state, can be by directly user being prompted to clear up
Shelter, user oneself can clear up, and without special cleaning personnel, while saving maintenance cost to user, also can avoid
Due to etc. it is to be repaired and cause for a long time shut down.
When environment temperature be less than the first predetermined temperature, and be greater than or equal to the second predetermined temperature,
If in the preset range time, under same operational mode, inflow temperature deviation (limiting temperature deviation within 5 DEG C
Value is 5 DEG C, this value is used for judging whether inflow temperature is stablized), and enter tube temperature degree and decline 10 DEG C or more (8 DEG C of limiting value), then sentence
Disconnected evaporator surface has foreign matter to block, under this state, can be by directly prompting user to clear up shelter, and user oneself can be clear
Reason, without special cleaning personnel, while saving maintenance cost to user, also can avoid due to etc. it is to be repaired and when causing long
Between shut down.
When environment temperature be less than the second predetermined temperature, and be greater than or equal to third predetermined temperature,
If defrost phenomenon does not occur in preceding primary judgement, existing defrost phenomenon is once judged afterwards, then judges evaporator table
Face has foreign matter to block；Under this state, can be by directly prompting user to clear up shelter, user oneself can clear up, without special
Door cleaning personnel, while saving maintenance cost to user, also can avoid due to etc. it is to be repaired and cause for a long time shut down.
When environment temperature be less than third predetermined temperature,
If a preceding unit operation is normal, then heating operation time be less than for the first predetermined time, and when defrost
Between be less than the second predetermined time, then judge that evaporator has foreign matter to block.Under this state, it can be hidden by directly prompting user to clear up
Block material, user oneself can clear up, without special cleaning personnel, while saving maintenance cost to user, also can avoid by
In etc. it is to be repaired and cause for a long time shut down.
In the present embodiment, user can be prompted to be respectively set as, clear up dust and foreign matter blocks two grades, if it is determined that knot
Fruit is blocked for foreign matter, then user's foreign matter is prompted to block, and user can voluntarily be handled, other situations then prompt cleaning dust, need
More professional personnel operate.
Preferably, in the present embodiment, the operational mode includes directly-heated pattern and circulation pattern.I.e. under directly-heated pattern, into
Coolant-temperature gage deviation enters tube temperature degree and declines 10 DEG C or more within 5 DEG C, judges that foreign matter blocks；Under circulation pattern, inflow temperature is inclined
Difference enters tube temperature degree and declines 10 DEG C or more within 5 DEG C, judges that foreign matter blocks；And when pattern changes, then it does not send out and appoints
What judging result, waiting judge next time.
Preferably, the preset range time is 1 hour.Timing after last judging result comes out, every 30
Minute judges once, therefore time range will ensure, comprising appearance is judged next time, can further preferably be set to 20min extremely
50min。
Embodiment 3
The abnormal judgment mode of evaporator with heat pump heat exchange provided in this embodiment is the basis in embodiment 1 or embodiment 2
Upper progress, when environment temperature is greater than or equal to the first predetermined temperature, electric expansion valve step number is greater than or equal to the first predetermined step number,
And it is less than the predetermined step number of third, then it represents that evaporator surface is stained with dust or has foreign matter to block evaporator, but unit remains to normally
Operation, if adjacent judge twice, the step number of electric expansion valve is jumped directly to by being greater than or equal to the predetermined step number of third less than the
One predetermined step number then judges that evaporator surface has foreign matter to block；Wherein, the predetermined step number of the third is that 380 steps or more (are preferably
400 steps).Under i.e. such state, although the dust or foreign matter of evaporator surface in the presence of, its covering part is smaller or thickness compared with
It is thin, the normal use of equipment is not influenced, can be not processed, and in practical application, such case can not prompt, or can be with
The prompt user state is that can clear up state.
Embodiment 4
As the preferred of embodiment 1, when environment temperature is greater than or equal to third predetermined temperature, compressor start third is pre-
Start to judge after fixing time, and judges once every the third predetermined time.Preferably, the third predetermined time is 30min (this
A not need value range, only timing acquiring data are calculated, it is determined as 30min acquisitions calculate primary).The purpose of this set
It is to reduce to judge number, avoids the load for repeatedly judging to generate, waste of resource.
Preferably, when environment temperature more than or equal to the second predetermined temperature and less than the first predetermined temperature, when judging every time
Record judging result, the time enters tube temperature degree and outlet pipe temperature.The record and judgement can ensure to find in time under the environment temperature
Heat exchanger surface whether adhering dust and foreign matter etc..
Embodiment 5
A kind of evaporator with heat pump is present embodiments provided, compared with existing evaporator, have to sentence the evaporator automatically
Disconnected evaporator whether occur heat exchange it is abnormal sentence function certainly.Specifically, it is respectively arranged on the formula evaporator：
Timer for carrying out timing to the unit operation time, detects the ambient temperature detection device of environment temperature, examines
Survey and enter pipe temperature-detecting device into tube temperature degree, detect the outlet pipe temperature-detecting device of tube temperature degree, detect whether start defrost,
And the defrost detection device whether defrost terminates, to the inflow temperature detection device that inflow temperature is detected, and according to
Above-mentioned testing result and timer carry out the control centre of operation judgement.The control centre transfers the ring according to environment temperature
Judgment method at a temperature of border is transferred the data of needs, is then judged according to the judgment method, obtains judging result, such as
Fruit equipment normal operation, then do not export judging result, or only will determine that result is preserved, if it is judged that being evaporator
It is abnormal, then alarm signal is sent out, directly shuts down under serious conditions, is damaged to avoid unit.
Embodiment 6
The present embodiment provides a kind of hot water machines comprising above-mentioned evaporator with heat pump, by the way of previous embodiment pair
The heat exchange state of evaporator is judged.Operation characteristic of the present embodiment according to hot water machine at different ambient temperatures, electronics are swollen
Swollen valve step number enters tube temperature degree, defrost situation etc., judges that evaporator surface has dust situation or whether has foreign matter to shelter from evaporation
Device.Save user check evaporator worry, remind user evaporator surface dust or the foreign matter blocked cleans or clearly
Reason ensures that unit operation is more safe and reliable energy saving.
Specifically, in use, preferred judgment method is as follows for the hot water machine：
One, when environment temperature T≤35 DEG C, compressor start starts to judge after 30 minutes, judges every 30 minutes once,
And record the result judged each time and time.
If the 1, steps of electric expansion valve Bu Shuo≤400, then it represents that unit operation is normal；
If 2,200≤electric expansion valve step number<400, then it represents that evaporator surface is stained with dust or has foreign matter to shelter from
Evaporator, but unit remains to normal operation；
If 3,140<Electric expansion valve step number<200, then it represents that evaporator heat exchange is abnormal, and in low circumstance temperature luck, guild goes out
Existing security risk, needs timely clean expander surface dirt or foreign matter；
If 4, electric expansion valve step number=140, indicate that evaporator heat exchange is abnormal, need clean expander surface dirt or
Can be switched on operation after foreign matter；
If 5, in 1 hour, i.e., adjacent when judging twice, electric expansion valve step number jumps to the 3rd or the 4th by the 1st article of situation
Situation, or jump to the 4th article of situation by the 2nd article, then evaporator surface has foreign matter to block in 1 hour before being judged as, needs
It is cleared up.
Two, as 20 DEG C of environment temperature≤T<At 35 DEG C, compressor start starts to judge after 30 minutes, judges every 30 minutes
Once, and the result judged each time and time is recorded, enters tube temperature degree.
If 1, electric expansion valve step number>140 steps, then it represents that unit operation is normal；
If the 2, step of electric expansion valve step number=140, and TEnter pipe-TOutlet pipe>5 DEG C,；It then indicates evaporator heat exchange exception, needs
Timely clean expander surface dirt or foreign matter；
If 3, in 1 hour, under same operational mode, inflow temperature deviation within 5 DEG C, then when enter tube temperature degree decline
10 DEG C or more, it can determine whether there is foreign matter to block for evaporator surface in 1 hour before, need into cleaning.
Three, as 10 DEG C of environment temperature≤T<At 20 DEG C, compressor start starts to judge after 30 minutes, judges every 30 minutes
Once, and the result judged each time and time are recorded.
If 1, there is defrost situation in unit, then it represents that evaporator heat exchange is abnormal, needs timely clean expander surface ash
Dirt or foreign matter；
If 2, defrost does not occur in preceding primary judgement unit, then once there is defrost situation, then 1 is small before being judged as
When interior evaporator there is foreign matter to block, cleared up.
Four, as environment temperature T<At 10 DEG C, start timing after compressor start, records unit heating operation time, defrost
Time.
If 1, the unit operation time<20min enters defrost, and defrost time<1min, then it represents that evaporator heat exchange is different
Often, timely clean expander surface dirt or foreign matter are needed；
If 2, the preceding unit heating operation time is normal, i.e., run time meets the logic control time, then once
The heating operation time<20min, and defrost time<1min, then evaporator has foreign matter to block in 1 hour before being judged as, need into
Row cleaning.
The hot water machine that the present embodiment is provided works as evaporator as a result of evaporator with heat pump heat exchange abnormality judgment method
When heat exchange exception occurs, user can understand in time, and according to circumstances make corresponding measure, reduce user and check evaporator
Worry, while more accurate processing can be made according to judging result, save human and material resources and time cost.
Embodiment in above-described embodiment can be further combined or replace, and embodiment is only to the present invention's
Preferred embodiment is described, and it is not intended to limit the concept and scope of the present invention, is not departing from design philosophy of the present invention
Under the premise of, the various changes and modifications that professional and technical personnel in the art make technical scheme of the present invention belong to this hair
Bright protection domain.
Claims (14)
- The abnormality judgment method 1. a kind of evaporator with heat pump exchanges heat, which is characterized in that environment temperature, electricity under measurement evaporator operation Sub- expansion valve step number, evaporator enter tube temperature degree, outlet pipe temperature, inflow temperature and defrost situation, according to different environment temperature Under degree, the change of tube temperature angle value, outlet pipe temperature value, inflow temperature value and heat pump is entered in conjunction with electric expansion valve step number, evaporator One or more of white situation is compared or analyzes with respective setting value, judges whether the evaporator exchanges heat It is abnormal；When environment temperature is greater than or equal to the first predetermined temperature, electric expansion valve step number is less than the first predetermined step number, judgement evaporation Device heat exchange is abnormal；And/orWhen environment temperature is greater than or equal to the second predetermined temperature and is less than the first predetermined temperature, electric expansion valve step number is less than or waits It is more than predetermined temperature difference with outlet pipe temperature difference in the tube temperature degree that enters of the second predetermined step number, and evaporator, then judges evaporator heat exchange It is abnormal；And/orWhen environment temperature is greater than or equal to third predetermined temperature and is less than the second predetermined temperature, there is defrost phenomenon in unit, then Judge that evaporator heat exchange is abnormal；And/orWhen environment temperature is less than third predetermined temperature, the unit operation time was less than for the first predetermined time i.e. into defrost, and changed The white time was less than for the second predetermined time, then judged evaporator heat exchange exception.
- The abnormality judgment method 2. evaporator with heat pump according to claim 1 exchanges heat, which is characterized in that the first pre- constant temperature Degree is 32 DEG C or more, and second predetermined temperature is 20 DEG C or more, and the third predetermined temperature is 7 DEG C or more, and described first is pre- It is 200 to determine step number, and the second predetermined step number is 140, and the predetermined temperature difference is 5 DEG C, and the first predetermined time was 20min, the Two predetermined times were 1min.
- The abnormality judgment method 3. evaporator with heat pump according to claim 1 exchanges heat, which is characterized in thatWhen environment temperature be greater than or equal to the first predetermined temperature,The step number of electric expansion valve is less than the first predetermined step number, and is greater than or equal to the second predetermined step number, then it represents that cold operation When will appear security risk, need timely clean expander surface,The step number of electric expansion valve is equal to the second step number, and after expression needs clean expander surface, could be switched on operation,If adjacent judge twice, the step number of electric expansion valve, which is jumped directly to by being more than or equal to the first predetermined step number, to be less than or equal to Second predetermined step number then judges that evaporator surface has foreign matter to block；When environment temperature be less than the first predetermined temperature, and be greater than or equal to the second predetermined temperature,If in the preset range time, under same operational mode, inflow temperature deviation enters tube temperature degree and declines 10 within 5 DEG C DEG C or more, then judge that evaporator surface occurs foreign matter and blocks；When environment temperature be less than the second predetermined temperature, and be greater than or equal to third predetermined temperature,If defrost phenomenon does not occur in preceding primary judgement, existing defrost phenomenon is once judged afterwards, then judges that evaporator surface has Foreign matter blocks；When environment temperature be less than third predetermined temperature,If a preceding unit operation is normal, then a heating operation time was less than for the first predetermined time, and the defrost time is small In the second predetermined time, then judge that evaporator has foreign matter to block.
- The abnormality judgment method 4. evaporator with heat pump according to claim 3 exchanges heat, which is characterized in that the operational mode packet Include directly-heated pattern and circulation pattern.
- The abnormality judgment method 5. evaporator with heat pump according to claim 3 exchanges heat, which is characterized in that when the preset range Between be 1 hour.
- The abnormality judgment method 6. evaporator with heat pump according to claim 1 or 2 or 3 exchanges heat, which is characterized in thatWhen environment temperature is greater than or equal to the first predetermined temperature, electric expansion valve step number is greater than or equal to the first predetermined step number, and Less than the predetermined step number of third, then it represents that evaporator surface is stained with dust or has foreign matter to block evaporator, but unit remains to normally transport Row；If adjacent judge twice, the step number of electric expansion valve is jumped directly to by being greater than or equal to the predetermined step number of third less than first Predetermined step number then judges that evaporator surface has foreign matter to block；Wherein, the predetermined step number of the third is 380 steps or more.
- The abnormality judgment method 7. evaporator with heat pump according to claim 1 exchanges heat, which is characterized in that when environment temperature is more than Or when equal to third predetermined temperature, compressor start starts to judge after the third predetermined time, and judge every the third predetermined time Once.
- The abnormality judgment method 8. evaporator with heat pump according to claim 7 exchanges heat, which is characterized in that when environment temperature is more than Or equal to the second predetermined temperature and it is less than the first predetermined temperature, judging result, time are recorded when judging every time, are entered tube temperature degree and are gone out Tube temperature degree.
- The abnormality judgment method 9. evaporator with heat pump according to claim 7 exchanges heat, which is characterized in that the pre- timing of third Between be 30min.
- The abnormality judgment method 10. evaporator with heat pump according to claim 1 exchanges heat, which is characterized in that when environment temperature is small Start timing after third predetermined temperature, compressor start, records unit heating operation time, defrost time.
- The abnormality judgment method 11. evaporator with heat pump according to claim 1 exchanges heat, which is characterized in that when judging result is When evaporator with heat pump heat exchange is abnormal, evaporator surface is checked, the dust or foreign matter on surface are removed.
- 12. a kind of evaporator with heat pump, which is characterized in that it uses methods of the claim 1-11 described in any one to judge heat pump Evaporator heat exchange is abnormal.
- 13. evaporator with heat pump according to claim 12, which is characterized in that the evaporator is finned evaporator.
- 14. a kind of hot water machine, which is characterized in that it includes the evaporator with heat pump described in one of claim 12-13.
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| CN106885368B (en) * | 2017-02-28 | 2020-06-05 | 合肥美的暖通设备有限公司 | Heat exchange fault detection method for air energy water heater due to blockage of air outlet by foreign matter |
| CN110332716B (en) * | 2019-07-16 | 2021-01-15 | 珠海格力电器股份有限公司 | Defrosting control method and device for heat pump water heater and heat pump water heater |
| CN114893936B (en) * | 2022-07-12 | 2022-09-16 | 深圳市兄弟制冰系统有限公司 | Water inlet and outlet control system and control method for ice making system |
Citations (3)
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|---|---|---|---|---|
| CN101644511A (en) * | 2008-08-06 | 2010-02-10 | Tcl集团股份有限公司 | Parallel flow evaporator and anti-freezing method thereof |
| CN102679645A (en) * | 2012-04-24 | 2012-09-19 | 美的集团有限公司 | Defrosting method for heat pump |
| JP2014020761A (en) * | 2012-07-23 | 2014-02-03 | Denso Corp | Evaporator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9522589B2 (en) * | 2012-10-05 | 2016-12-20 | GM Global Technology Operations LLC | Vehicular heat pump system and control method |
| US9182166B2 (en) * | 2013-01-21 | 2015-11-10 | Ford Global Technologies, Llc | Vehicle evaporator core icing prevention |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644511A (en) * | 2008-08-06 | 2010-02-10 | Tcl集团股份有限公司 | Parallel flow evaporator and anti-freezing method thereof |
| CN102679645A (en) * | 2012-04-24 | 2012-09-19 | 美的集团有限公司 | Defrosting method for heat pump |
| JP2014020761A (en) * | 2012-07-23 | 2014-02-03 | Denso Corp | Evaporator |
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