CN103808012B - Frequency change water heater and control method thereof - Google Patents
Frequency change water heater and control method thereof Download PDFInfo
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- CN103808012B CN103808012B CN201210452507.1A CN201210452507A CN103808012B CN 103808012 B CN103808012 B CN 103808012B CN 201210452507 A CN201210452507 A CN 201210452507A CN 103808012 B CN103808012 B CN 103808012B
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Abstract
The invention provides a kind of frequency change water heater and control method thereof. this frequency change water heater comprises compressor, cross valve, evaporimeter, water fluorine heat exchanger or condenser and controller, compressor, cross valve, evaporimeter, water fluorine heat exchanger or condenser are in turn connected to form refrigerating circuit, described frequency change water heater also comprises pressure-detecting device, described pressure-detecting device is arranged on the blast pipe place of described compressor, for detection of the pressure at expulsion of described compressor, described pressure-detecting device is electrically connected with described controller, described controller is in the time that described pressure-detecting device detects that the pressure at expulsion of compressor reaches preset pressure, control the frequency or the stoppage protection that reduce described compressor. its pressure at expulsion that frequency change water heater can be detected according to pressure-detecting device in the time of high water temperature operation is carried out FREQUENCY CONTROL, has improved heating efficiency and has accelerated water heating speed.
Description
Technical field
The present invention relates to refrigerating field, particularly relate to a kind of frequency change water heater and control method thereof.
Background technology
Frequency change water heater has the advantage that heating efficiency is variable and capability improving is fast, can meet user and use fastThe demand of water. Under pattern in rapid hot water demand, the ability of unit output strengthens, and compressor frequency needsConstantly rising even moves to highest frequency, and pressure is very high when the high water temperature operation of unit, if nowStill very large with the possibility of high frequency operation high voltage protective.
So in design for safety conventionally adopt unit operation to high water temperature significantly the method for frequency reducing fallSystem pressure before low shutdown, but in high water temperature section significantly when frequency reducing, the inevitable frequency change water heater of significantly sacrificingHeating efficiency.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of frequency change water heater and control method thereof,It has solved and has reduced the problem that system pressure loses heating capacity simultaneously, and the present invention realizes above-mentioned purpose and adoptsTechnical scheme be:
A kind of frequency change water heater, comprises compressor, also comprises pressure-detecting device and controller;
Described pressure-detecting device is arranged on the blast pipe place of described compressor, for detection of described compressorPressure at expulsion;
Described controller is electrically connected with described pressure-detecting device, for detecting at described pressure-detecting deviceWhen the pressure at expulsion of described compressor reaches preset pressure, control running frequency or the shutdown of described compressorProtection.
More preferably, described pressure-detecting device comprises the first pressure detecting subelement and the second pressure detecting listUnit;
The first preset pressure switch value of described the first pressure detecting subelement is less than described the second pressure detectingThe second preset pressure switch value of unit;
When described pressure at expulsion is greater than or equal to the first preset pressure switch value of the first pressure detecting subelementTime, compressor holding frequency is constant and continue operation described in described controller control, and reaches default in water temperatureAfter water temperature, shut down;
When described pressure at expulsion is greater than or equal to the second preset pressure switch value of the second pressure detecting subelementTime, compressor shutdown described in described controller control.
More preferably, described the first pressure detecting subelement and the second pressure detecting subelement be pressure sensor orMechanical pressure switch.
More preferably, described frequency change water heater also comprises cross valve, evaporimeter and water fluorine heat exchanger or condenser;
Described compressor, cross valve, evaporimeter, water fluorine heat exchanger or condenser are in turn connected to form and freeze backRoad.
The control method that a kind of frequency change water heater is also provided, comprises the steps:
The pressure-detecting device of frequency change water heater detects the pressure at expulsion of the compressor of described frequency change water heater;
The controller of described frequency change water heater detects the exhaust pressure of described compressor at described pressure-detecting deviceWhen power reaches preset pressure, control running frequency or the stoppage protection of described compressor.
More preferably, running frequency or the stoppage protection of compressor, comprise as follows described in described controller controlStep:
In the time that described pressure at expulsion is greater than or equal to the first preset pressure switch value of pressure-detecting device, instituteState described in controller control compressor holding frequency constant and continue operation, and reach after default water temperature in water temperatureShut down;
In the time that described pressure at expulsion is greater than or equal to the second preset pressure switch value of pressure-detecting device, instituteState compressor shutdown described in controller control.
More preferably, be greater than or equal to the second preset pressure switch of pressure-detecting device when described pressure at expulsionWhen value, after compressor shutdown, also comprise the steps: described in described controller control
When being reduced to, the pressure at expulsion of described compressor is less than described the second preset pressure switch value and downtimeBe more than or equal to after Preset Time, described compressor starts operation again, and be more than or equal to described second pre-If again shut down after pressure switch value;
Repeat aforesaid operations, until the water temperature of frequency change water heater is shut down after reaching default water temperature.
More preferably, when the pressure at expulsion of described compressor be reduced to be less than described the second preset pressure switch value andBe more than or equal to downtime after Preset Time, described compressor starts operation again, and being more than or equal toAfter stating the second preset pressure switch value, again shut down, comprise the steps:
If work as the second preset pressure switch value that described pressure at expulsion is greater than or equal to pressure-detecting device, pressContracting machine shut down time, the running frequency of described compressor is fstop, when described compressor again start move time,Described in described controller control, the running frequency f of compressor is less than it in the time of described the second preset pressure switch valueRunning frequency fstop, i.e. f < fstop.
Further, the running frequency after the restarting of described compressor is that f is no more than it described second0.9 times of running frequency fstop when preset pressure switch value, i.e. f≤0.9fstop;
Described Preset Time is for being greater than or equal to 3 minutes.
Further, in the time that described frequency change water heater shuts down or heat end, also comprise the steps:
Described controller is removed the restriction of f≤0.9fstop, and controls described compressor still in the time starting shooting next timeMove with original frequency; Or described controller memory f≤0.9fstop, and in the time starting shooting next time, control described pressureContracting machine is with the running frequency operation of f≤0.9fstop.
The invention has the beneficial effects as follows:
Frequency change water heater of the present invention and control method thereof make the frequency change water heater can be according to pressure in the time of the operation of high water temperatureThe pressure at expulsion that force checking device detects is carried out FREQUENCY CONTROL, has improved heating efficiency and has accelerated water heating speedDegree.
Brief description of the drawings
Fig. 1 is frequency change water heater one embodiment schematic diagram of the present invention;
Fig. 2 is the control flow chart of frequency change water heater one embodiment shown in Fig. 1;
Fig. 3 is the control flow chart of another embodiment of frequency change water heater shown in Fig. 1.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and realityExecuting example is further elaborated to frequency change water heater of the present invention and control method thereof. Should be appreciated that thisLocate described specific embodiment only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 is frequency change water heater one embodiment schematic diagram of the present invention, and as shown in Figure 1, frequency change water heater one is realExecute example and comprise compressor 1, cross valve 2, evaporimeter 3, electric motor fan 31, restricting element 4, the heat exchange of water fluorineDevice or condenser 5 and controller (not shown), described compressor 1, described cross valve 2, described evaporimeter 3,Described water fluorine heat exchanger or condenser 5 are in turn connected to form refrigerating circuit, in described refrigerating circuit, throttling are setElement 4, is provided with gas-liquid separator 11 on described compressor 1, and described refrigerating circuit is by water fluorine heat exchangerOr condenser 5 heating waters, described frequency change water heater also comprises the pressure inspection that is arranged at compressor 1 blast pipe placeSurvey device, for detection of the pressure at expulsion of described compressor 1; Described controller and described pressure-detecting deviceElectrical connection, in order to detect the pressure at expulsion of described compressor 1, for detecting at described pressure-detecting deviceWhen the pressure at expulsion of described compressor reaches preset pressure, control running frequency or the shutdown of described compressorProtection.
More preferably, as a kind of embodiment, described pressure-detecting device comprises that the first pressure detecting is singleUnit 6 and the second pressure detecting subelement 7;
The preset pressure switch value of described the first pressure detecting subelement 6 is the first preset pressure switch value, instituteThe preset pressure switch value of stating the second pressure detecting subelement 7 is the second preset pressure switch value, described firstPreset pressure switch value is less than the second preset pressure switch value;
In the time that described pressure at expulsion is greater than or equal to described the first preset pressure switch value, described controller controlMake described compressor holding frequency constant and continue operation, and shut down after water temperature reaches default water temperature;
In the time that described pressure at expulsion is greater than or equal to described the second preset pressure switch value, described controller controlMaking described compressor 1 shuts down.
Preferably, described the first pressure detecting subelement 6 and the second pressure detecting subelement 7 are pressure sensingDevice or mechanical pressure switch.
With reference to Fig. 2 and Fig. 3, be machine with described the first pressure detecting subelement and the second pressure detecting subelementTool formula pressure switch is that example describes the control method of frequency change water heater of the present invention, described the first pressureDetection sub-unit 6 and the second pressure detecting subelement 7 are respectively pressure switch P1 and pressure switch P2, wherein,The preset pressure switch value of described the first pressure detecting subelement 6 is the first preset pressure switch value P1, described inThe preset pressure switch value of the second pressure detecting subelement 7 is the second preset pressure switch value P2, P1 < P2,The control method of described frequency change water heater, comprises the steps:
The pressure-detecting device of frequency change water heater detects the pressure at expulsion of the compressor of described frequency change water heater;
The controller of described frequency change water heater detects the exhaust pressure of described compressor at described pressure-detecting deviceWhen power reaches preset pressure, control running frequency or the stoppage protection of described compressor 1.
More preferably, as a kind of embodiment, the running frequency of compressor 1 described in described controller controlOr stoppage protection, comprises the steps:
In the time that described pressure at expulsion is greater than or equal to the first preset pressure switch value P1, described controller controlDescribed compressor 1 holding frequency is constant and continue operation, and shuts down after water temperature reaches default water temperature;
In the time that described pressure at expulsion is greater than or equal to the second preset pressure switch value P2, described controller controlDescribed compressor 1 is shut down.
Further, in the time that described pressure at expulsion is greater than or equal to the second preset pressure switch value P2, described inAfter described in controller control, compressor 1 is shut down, also comprise the steps:
When being reduced to, the pressure at expulsion of described compressor 1 is less than described the second preset pressure switch value P2 and shutdownTime is more than or equal to after Preset Time, and described compressor 1 starts operation again, and described in being more than or equal toAfter the second preset pressure switch value P2, again shut down;
Repeat aforesaid operations, until the water temperature of frequency change water heater is shut down after reaching default water temperature.
More preferably, as a kind of embodiment, when being reduced to, the pressure at expulsion of described compressor 1 is less than instituteState the second preset pressure switch value P2 and be more than or equal to downtime after Preset Time, described compressor againStart operation, and being more than or equal to shutdown again after described the second preset pressure switch value P2, comprise following stepRapid:
If when described pressure at expulsion is greater than or equal to the second preset pressure switch value P2, when compressor 1 is shut down,The running frequency of described compressor 1 is fstop, when described compressor 1 starts when operation, described control againDescribed in device control processed, the running frequency f of compressor 1 is less than it when described the second preset pressure switch value P2Running frequency fstop, i.e. f < fstop.
Preferably, the running frequency after the restarting of described compressor 1 is that f is no more than it described second0.9 times of running frequency fstop when preset pressure switch value P2, i.e. f≤0.9fstop;
Described Preset Time is for being greater than or equal to 3 minutes.
More preferably, as another kind of embodiment, in the time that described frequency change water heater shuts down or heat end,Described controller is removed the restriction of f≤0.9fstop, and in the time starting shooting next time, controls described compressor still with formerBeginning frequency operation, as shown in Figure 2; Or described controller memory f≤0.9fstop, and the time control of starting shooting in next timeMake the running frequency operation of described compressor with f≤0.9fstop, as shown in Figure 3.
Frequency change water heater of the present invention and control method thereof make the frequency change water heater can be according to pressure in the time of the operation of high water temperatureThe pressure at expulsion that force checking device detects is carried out FREQUENCY CONTROL, has improved heating efficiency and has accelerated water heating speedDegree.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed,But can not therefore be interpreted as the restriction to the scope of the claims of the present invention. It should be pointed out that for this areaThose of ordinary skill, without departing from the inventive concept of the premise, can also make some distortion andImprove, these all belong to protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be with appendedClaim is as the criterion.
Claims (8)
1. a frequency change water heater, comprises compressor, it is characterized in that:
Also comprise pressure-detecting device and controller;
Described pressure-detecting device is arranged on the blast pipe place of described compressor, for detection of described compressorPressure at expulsion;
Described controller is electrically connected with described pressure-detecting device, for detecting at described pressure-detecting deviceWhen the pressure at expulsion of described compressor reaches preset pressure, control running frequency or the shutdown of described compressorProtection;
Described pressure-detecting device comprises the first pressure detecting subelement and the second pressure detecting subelement;
The first preset pressure switch value of described the first pressure detecting subelement is less than described the second pressure detectingThe second preset pressure switch value of unit;
When described pressure at expulsion is greater than or equal to the first preset pressure switch value of the first pressure detecting subelementTime, compressor holding frequency is constant and continue operation described in described controller control, and reaches default in water temperatureAfter water temperature, shut down;
When described pressure at expulsion is greater than or equal to the second preset pressure switch value of the second pressure detecting subelementTime, compressor shutdown described in described controller control.
2. frequency change water heater according to claim 1, is characterized in that:
Described the first pressure detecting subelement and the second pressure detecting subelement are pressure sensor or mechanical type pressingPower switch.
3. according to the frequency change water heater described in claim 1 to 2 any one, it is characterized in that:
Also comprise cross valve, evaporimeter and water fluorine heat exchanger or condenser;
Described compressor, cross valve, evaporimeter, water fluorine heat exchanger or condenser are in turn connected to form and freeze backRoad.
4. a control method for frequency change water heater, is characterized in that:
Comprise the steps:
The pressure-detecting device of frequency change water heater detects the pressure at expulsion of the compressor of described frequency change water heater;
The controller of described frequency change water heater detects the exhaust pressure of described compressor at described pressure-detecting deviceWhen power reaches preset pressure, control running frequency or the stoppage protection of described compressor;
Described in described controller control, running frequency or the stoppage protection of compressor, comprise the steps:
In the time that described pressure at expulsion is greater than or equal to the first preset pressure switch value of pressure-detecting device, instituteState described in controller control compressor holding frequency constant and continue operation, and reach after default water temperature in water temperatureShut down;
In the time that described pressure at expulsion is greater than or equal to the second preset pressure switch value of pressure-detecting device, instituteState compressor shutdown described in controller control.
5. control method according to claim 4, is characterized in that, be greater than when described pressure at expulsion orWhen person equals the second preset pressure switch value of pressure-detecting device, compressor stops described in described controller controlAfter machine, also comprise the steps:
When being reduced to, the pressure at expulsion of described compressor is less than described the second preset pressure switch value and downtimeBe more than or equal to after Preset Time, described compressor starts operation again, and be more than or equal to described second pre-If again shut down after pressure switch value;
Repeat aforesaid operations, until the water temperature of frequency change water heater is shut down after reaching default water temperature.
6. control method according to claim 5, is characterized in that:
When being reduced to, the pressure at expulsion of described compressor is less than described the second preset pressure switch value and downtimeBe more than or equal to after Preset Time, described compressor starts operation again, and be more than or equal to described second pre-If again shut down after pressure switch value, comprise the steps:
If work as the second preset pressure switch value that described pressure at expulsion is greater than or equal to pressure-detecting device, pressContracting machine shut down time, the running frequency of described compressor is fstop, when described compressor again start move time,Described in described controller control, the running frequency f of compressor is less than it in the time of described the second preset pressure switch valueRunning frequency fstop, i.e. f < fstop.
7. control method according to claim 6, is characterized in that:
Running frequency after the restarting of described compressor is that f is no more than it and opens in described the second preset pressure0.9 times of the running frequency fstop in pass when value, i.e. f≤0.9fstop;
Described Preset Time is for being greater than or equal to 3 minutes.
8. control method according to claim 7, is characterized in that:
In the time that described frequency change water heater shuts down or heat end, also comprise the steps;
Described controller is removed the restriction of f≤0.9fstop, and in the time starting shooting next time, control described compressor still withOriginal frequency operation; Or described controller memory f≤0.9fstop, and in the time starting shooting next time, control described compressionMachine is with the running frequency operation of f≤0.9fstop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210452507.1A CN103808012B (en) | 2012-11-13 | 2012-11-13 | Frequency change water heater and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210452507.1A CN103808012B (en) | 2012-11-13 | 2012-11-13 | Frequency change water heater and control method thereof |
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| CN103808012A CN103808012A (en) | 2014-05-21 |
| CN103808012B true CN103808012B (en) | 2016-06-08 |
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| CN201210452507.1A Active CN103808012B (en) | 2012-11-13 | 2012-11-13 | Frequency change water heater and control method thereof |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI597463B (en) * | 2016-01-25 | 2017-09-01 | 保音股份有限公司 | A method for detecting an exhaust line of a water heater device |
| DE102017214941A1 (en) | 2017-08-25 | 2019-02-28 | Dometic Sweden Ab | Recreational vehicle, cooling device, control system and method of controlling the cooling device |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| CN113390125A (en) * | 2020-03-13 | 2021-09-14 | 青岛海尔中央空调有限公司 | Unit start-stop control method, system and device based on water outlet temperature correction |
| CN111473466B (en) * | 2020-04-21 | 2022-03-22 | 宁波奥克斯电气股份有限公司 | Frequency control method and air conditioner |
| CN112856856B (en) * | 2020-05-22 | 2023-02-28 | 青岛海尔新能源电器有限公司 | Heat pump unit control method and heat pump unit |
| CN113739350B (en) * | 2021-09-23 | 2022-05-03 | 宁波奥克斯电气股份有限公司 | Low-temperature heating frequency conversion control method and device, storage medium and air conditioner |
| CN113883681A (en) * | 2021-09-28 | 2022-01-04 | 青岛海尔中央空调有限公司 | Control method for refrigeration system and refrigeration system |
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| JP2008202809A (en) * | 2007-02-16 | 2008-09-04 | Matsushita Electric Ind Co Ltd | Heat pump type water heater |
| EP1972871A2 (en) * | 2007-03-19 | 2008-09-24 | Mitsubishi Electric Corporation | Hot water system |
| JP2009150609A (en) * | 2007-12-21 | 2009-07-09 | Corona Corp | Heat pump type water heater |
| JP2009243774A (en) * | 2008-03-31 | 2009-10-22 | Panasonic Corp | Heat pump type water heater |
| JP2012067929A (en) * | 2010-09-21 | 2012-04-05 | Panasonic Corp | Heat pump cycle apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008202809A (en) * | 2007-02-16 | 2008-09-04 | Matsushita Electric Ind Co Ltd | Heat pump type water heater |
| EP1972871A2 (en) * | 2007-03-19 | 2008-09-24 | Mitsubishi Electric Corporation | Hot water system |
| JP2009150609A (en) * | 2007-12-21 | 2009-07-09 | Corona Corp | Heat pump type water heater |
| JP2009243774A (en) * | 2008-03-31 | 2009-10-22 | Panasonic Corp | Heat pump type water heater |
| JP2012067929A (en) * | 2010-09-21 | 2012-04-05 | Panasonic Corp | Heat pump cycle apparatus |
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| CN103808012A (en) | 2014-05-21 |
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