CN105299988A - Air-cooled heat pump water cooling and heating machine and high voltage protection preventing method for air-cooled heat pump water cooling and heating machine - Google Patents
Air-cooled heat pump water cooling and heating machine and high voltage protection preventing method for air-cooled heat pump water cooling and heating machine Download PDFInfo
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Abstract
The invention discloses a high-voltage protection preventing method for an air-cooled heat pump water cooling and heating machine and the air-cooled heat pump water cooling and heating machine adopting the method. The method includes the following steps that the outdoor environment temperature and the water discharging temperature of a water outlet are detected; the allowable maximum value Imax of the currents I of compressors is obtained, and the allowable maximum value delta Imax of the difference value delta I of the maximum current and the minimum current among the currents of the N compressors is obtained; during the process of defrosting, the temperature T3 of an outlet of an air-cooling heat exchanger in each water heating system is obtained; when T3 does not reach a preset defrosting exit value but delta I is larger than or equal to the delta Imax, if I is larger than or equal to Imax, the compressor corresponding to I larger than or equal to the Imax is controlled to shut down so that the compressor can be protected against high voltage protection. By adopting the method, compressors can be effectively protected against high voltage protection in the defrosting process, and therefore user experience is improved.
Description
Technical field
The present invention relates to air-conditioner technical field, what particularly relate to a kind of air-cooled heat pump cold-hot water machine prevents high voltage protective method and a kind of air-cooled heat pump cold-hot water machine.
Background technology
Air-cooled heat pump water chiller-heater units take air as the middle-size and small-size central air-conditioning of low-temperature receiver or thermal source, and it is that refrigerant and water carry out heat exchange with refrigerant, cooled or water after heating by secondary heat exchange for desired zone provides cold or heat.
Existing air-cooled heat pump water chiller-heater units is when defrost, and due to the existence of refrigerating medium, low pressure heat exchange property is good, therefore extremely easily occurs high voltage protective.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention be to propose a kind of can perform in defrost course of action effectively prevent compressor from occurring the air-cooled heat pump cold-hot water machine of high voltage protective prevent high voltage protective method.
Another object of the present invention is to propose a kind of air-cooled heat pump cold-hot water machine.
For achieving the above object, what one aspect of the present invention embodiment proposed a kind of air-cooled heat pump cold-hot water machine prevents high voltage protective method, described air-cooled heat pump cold-hot water machine comprises N number of water heating system, N be more than or equal to 2 integer, described N number of water heating system shares a water cooling heat exchanger, each water heating system comprises compressor and air cooling heat exchanger, described water cooling heat exchanger comprises water inlet and delivery port, the described high voltage protective method that prevents comprises the following steps: when described air-cooled heat pump cold-hot water machine enters defrost pattern, detect outdoor environment temperature T4, and detect the leaving water temperature Tout of described delivery port, obtain the electric current I of compressor when described air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of described outdoor environment temperature T4 and described delivery port and allow the maximum Imax reached, and the difference △ I obtaining maximum current and minimum current in the electric current of N number of compressor when described air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of described outdoor environment temperature T4 and described delivery port allows the maximum △ Imax that reaches, perform at described air-cooled heat pump cold-hot water machine in the process of defrost action, obtain the outlet temperature T3 of the air cooling heat exchanger in each water heating system, when there is T3 and do not reach default defrost disengaging value and △ I being more than or equal to △ Imax, if there is I to be more than or equal to Imax, then control this compressor shutdown corresponding to I being more than or equal to Imax, occur high voltage protective to prevent this compressor.
High voltage protective method is prevented according to the air-cooled heat pump cold-hot water machine of the embodiment of the present invention, when air-cooled heat pump cold-hot water machine enters defrost pattern, detect the leaving water temperature Tout of outdoor environment temperature T4 and delivery port, and allow the difference △ I of maximum current and minimum current in the electric current of maximum Imax and the N number of compressor reached to allow the maximum △ Imax reached according to the electric current I of compressor during the machine execution defrost action of outdoor environment temperature T4 and leaving water temperature Tout acquisition air-cooled heat pump cold-hot water, perform in the process of defrost action at air-cooled heat pump cold-hot water machine, obtain the outlet temperature T3 of the air cooling heat exchanger in each water heating system, when there is T3 and not reaching default defrost disengaging value and △ I being more than or equal to △ Imax, if there is I to be more than or equal to Imax, then control this compressor shutdown corresponding to I being more than or equal to Imax, thus effectively prevent compressor from occurring high voltage protective, avoid compressor damage, improve Consumer's Experience.
According to one embodiment of present invention; after controlling the compressor shutdown corresponding to this I being more than or equal to Imax; if the T3 not stopping water heating system corresponding to compressor all reaches described default defrost disengaging value, then control described air-cooled heat pump cold-hot water machine and exit described defrost pattern.
According to one embodiment of present invention, when the T3 of each water heating system all reaches described default defrost disengaging value, control described air-cooled heat pump cold-hot water machine and exit described defrost pattern.
For achieving the above object, the present invention on the other hand embodiment proposes a kind of air-cooled heat pump cold-hot water machine, and comprising: water cooling heat exchanger, described water cooling heat exchanger comprises water inlet and delivery port, N number of water heating system, described N number of water heating system shares described water cooling heat exchanger, and each water heating system comprises compressor and air cooling heat exchanger, wherein, N be more than or equal to 2 integer, temperature detecting module, for detecting the leaving water temperature Tout of outdoor environment temperature T4 and the described delivery port of detection when described air-cooled heat pump cold-hot water machine enters defrost pattern, control module, the maximum Imax that reaches is allowed for obtaining the electric current I of compressor when described air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of described outdoor environment temperature T4 and described delivery port, and the difference △ I obtaining maximum current and minimum current in the electric current of N number of compressor when described air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of described outdoor environment temperature T4 and described delivery port allows the maximum △ Imax that reaches, and perform in the process of defrost action at described air-cooled heat pump cold-hot water machine, described control module obtains the outlet temperature T3 of the air cooling heat exchanger in each water heating system, wherein, when there is T3 and not reaching default defrost disengaging value and △ I being more than or equal to △ Imax, if there is I to be more than or equal to Imax, described control module then controls this compressor shutdown corresponding to I being more than or equal to Imax, high voltage protective is there is to prevent this compressor.
According to the air-cooled heat pump cold-hot water machine of the embodiment of the present invention, the leaving water temperature Tout of the outdoor environment temperature T4 that control module detects according to temperature detecting module and delivery port obtains the electric current I of compressor when air-cooled heat pump cold-hot water machine performs defrost action and allows the difference △ I of maximum current and minimum current in the electric current of maximum Imax and the N number of compressor reached to allow the maximum △ Imax reached, and perform in the process of defrost action at air-cooled heat pump cold-hot water machine, obtain the outlet temperature T3 of the air cooling heat exchanger in each water heating system, when there is T3 and not reaching default defrost disengaging value and △ I being more than or equal to △ Imax, if there is I to be more than or equal to Imax, then control this compressor shutdown corresponding to I being more than or equal to Imax, thus effectively prevent compressor from occurring high voltage protective, avoid compressor damage, improve Consumer's Experience.
According to one embodiment of present invention; after controlling the compressor shutdown corresponding to this I being more than or equal to Imax; if the T3 not stopping water heating system corresponding to compressor all reaches described default defrost disengaging value, described control module then controls described air-cooled heat pump cold-hot water machine and exits described defrost pattern.
According to one embodiment of present invention, when the T3 of each water heating system all reaches described default defrost disengaging value, described control module controls described air-cooled heat pump cold-hot water machine and exits described defrost pattern.
According to one embodiment of present invention, described temperature detecting module comprises the outdoor temperature sensor for detecting described outdoor environment temperature T4 and the leaving water temperature sensors for detecting described leaving water temperature Tout, wherein, described leaving water temperature sensors is arranged on described water outlet.
Accompanying drawing explanation
Fig. 1 is the flow chart preventing high voltage protective method of the air-cooled heat pump cold-hot water machine according to the embodiment of the present invention.
Fig. 2 is the flow chart preventing high voltage protective method of air-cooled heat pump cold-hot water machine according to an embodiment of the invention.
Fig. 3 is the structural representation of air-cooled heat pump cold-hot water machine according to an embodiment of the invention.
Reference numeral: water cooling heat exchanger 10, compressor 11, cross valve 12, air cooling heat exchanger 13, restricting element 14, gas-liquid separator 15, compressor 21, cross valve 22, air cooling heat exchanger 23, restricting element 24 and gas-liquid separator 25.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
What describe the air-cooled heat pump cold-hot water machine proposed according to the embodiment of the present invention with reference to the accompanying drawings prevents high voltage protective method and air-cooled heat pump cold-hot water machine.
Fig. 1 is the flow chart preventing high voltage protective method of the air-cooled heat pump cold-hot water machine according to the embodiment of the present invention; wherein; air-cooled heat pump cold-hot water machine comprises N number of water heating system; N be more than or equal to 2 integer; N number of water heating system shares a water cooling heat exchanger; each water heating system comprises compressor and air cooling heat exchanger, and water cooling heat exchanger comprises water inlet and delivery port.
Specifically, as shown in Figure 3, when N equals 2, air-cooled heat pump cold-hot water machine comprises the first water heating system and the second water heating system, wherein, first water heating system can comprise compressor 11, cross valve 12, air cooling heat exchanger 13, restricting element 14 and gas-liquid separator 15, second water heating system can comprise compressor 21, cross valve 22, air cooling heat exchanger 23, restricting element 24 and gas-liquid separator 25.Air cooling heat exchanger 13 and air cooling heat exchanger 23 can be finned heat exchanger, and water cooling heat exchanger 10 can be double pipe heat exchanger.
When air-cooled heat pump cold-hot water machine is in refrigeration mode, in the first water heating system, liquid refrigerants in compressor 11 inhaling air liquid/gas separator 15 also pressurizes to export HTHP refrigerant to it, HTHP refrigerant flows into air cooling heat exchanger 13 after cross valve 12, by air cooling heat exchanger 13 to outdoor air heat release with dispensing liquid refrigerant, then after restricting element 14, water cooling heat exchanger 10 is entered, after liquid refrigerants absorbs the heat of the water flowing into water cooling heat exchanger 10, gas-liquid separator 15 is flowed back to by cross valve 12, wherein, water cooled in water cooling heat exchanger can be desired zone again after secondary heat exchange provides cold.The refrigerant of the second water heating system flows to the first water heating system, is just not described in detail here.
When air-cooled heat pump cold-hot water machine is in heating mode, in the first water heating system, liquid refrigerants in compressor 11 inhaling air liquid/gas separator 15 also pressurizes to export HTHP refrigerant to it, HTHP refrigerant flows into water cooling heat exchanger 10 after cross valve 12, heat release is carried out with dispensing liquid refrigerant to the water flowing into water cooling heat exchanger 10, through restricting element 14 laggard enter air cooling heat exchanger 13, by the heat in air cooling heat exchanger 13 absorption chamber outer air, then gas-liquid separator 15 is flowed back to by cross valve 12, wherein, after secondary heat exchange, be can be desired zone again by the water heated in water cooling heat exchanger and heat is provided.The refrigerant of the second water heating system flows to the first water heating system, is just not described in detail here.
When air-cooled heat pump cold-hot water machine is in heating mode, due to when refrigerant enters air cooling heat exchanger by the heat in absorption chamber outer air, thus make air cooling heat exchanger occur frosting situation, therefore need to carry out defrost.When air-cooled heat pump cold-hot water machine carries out defrost, due to the existence of refrigerating medium, be easy to occur high voltage protective, therefore, what embodiments of the invention proposed a kind of air-cooled heat pump cold-hot water machine prevents high voltage protective method.
As shown in Figure 1, the high voltage protective method that prevents of this air-cooled heat pump cold-hot water machine comprises the following steps:
S1, when air-cooled heat pump cold-hot water machine enters defrost pattern, detects outdoor environment temperature T4, and detects the leaving water temperature Tout at the mouth of a river.
S2, obtain the electric current I of compressor when air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of outdoor environment temperature T4 and delivery port and allow the maximum Imax reached, and the difference △ I obtaining maximum current and minimum current in the electric current of N number of compressor when air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of outdoor environment temperature T4 and delivery port allows the maximum △ Imax that reaches.
Wherein, maximum Imax is with in certain outlet water temperature range within the scope of certain outdoor environment temperature, when air-cooled heat pump cold-hot water machine performs defrost action, allows the maximum that the electric current I of compressor reaches.Maximum △ Imax is with in certain outlet water temperature range within the scope of certain outdoor environment temperature, when air-cooled heat pump cold-hot water machine performs defrost action, and the maximum reached that in the electric current of N number of compressor, the difference △ I of maximum current and minimum current allows.
S3, performs at air-cooled heat pump cold-hot water machine in the process of defrost action, obtains the outlet temperature T3 of the air cooling heat exchanger in each water heating system.
S4, when there is T3 and do not reach default defrost disengaging value and △ I being more than or equal to △ Imax, if there is I to be more than or equal to Imax, then controls this compressor shutdown corresponding to I being more than or equal to Imax, occurs high voltage protective to prevent this compressor.Wherein, the defrost disengaging value preset can set according to actual conditions.
Specifically, before defrost action starts, first select suitable maximum Imax and maximum △ Imax according to the leaving water temperature Tout of the outdoor environment temperature T4 detected and delivery port.After execution defrost action, the outlet temperature of the N number of air cooling heat exchanger of Real-time Obtaining and the electric current of N number of compressor, and the difference △ I of maximum current and minimum current in the outlet temperature of N number of air cooling heat exchanger and the electric current of N number of compressor is judged.When after defrost a period of time; if there is the defrost disengaging value not reaching default in the outlet temperature of N number of air cooling heat exchanger; and there is △ I >=△ Imax; then represent the impact due to the factor such as frosting or environment; the defrost of the water heating system in air-cooled heat pump cold-hot water machine is made to occur comparatively making great difference; water heating system may be had to occur the risk of hypertonia; therefore; need to judge further the electric current of N number of compressor; if judge that the electric current of compressor is more than or equal to Imax; then control this compressor shutdown, occur high voltage protective to prevent this compressor.
According to one embodiment of present invention; after controlling the compressor shutdown corresponding to this I being more than or equal to Imax; if the T3 not stopping water heating system corresponding to compressor all reaches default defrost disengaging value, then control air-cooled heat pump cold-hot water machine and exit defrost pattern.
That is; in execution defrost course of action; if judge that the electric current of compressor is more than or equal to Imax; then directly control this compressor shutdown; until the outlet temperature of not stopping air cooling heat exchanger corresponding to compressor all reaches default defrost disengaging value, then control air-cooled heat pump cold-hot water machine and exit defrost pattern.
According to one embodiment of present invention, when the T3 of each water heating system all reaches default defrost disengaging value, control air-cooled heat pump cold-hot water machine and exit defrost pattern.
Be understandable that, in execution defrost course of action, if the defrost of N number of water heating system is more or less the same, △ I is then there will not be to be more than or equal to the situation of △ Imax, therefore, when the T3 of each water heating system all reaches default defrost disengaging value, control air-cooled heat pump cold-hot water machine and exit defrost pattern.
Particularly, after air-cooled heat pump cold-hot water machine enters defrost pattern, detect the leaving water temperature Tout of outdoor environment temperature T4 and delivery port, the electric current I obtaining compressor according to the outdoor environment temperature T4 detected and leaving water temperature Tout allows the difference △ I of maximum current and minimum current in the electric current of maximum Imax and the N number of compressor reached to allow the maximum △ Imax reached.
After air-cooled heat pump cold-hot water machine starts to perform defrost action, the outlet temperature of the N number of air cooling heat exchanger of Real-time Obtaining is respectively T3
1, T3
2..., T3
n, and the outlet temperature T3 to the N number of air cooling heat exchanger obtained
1, T3
2..., T3
njudge, the current flow of the N number of compressor of Real-time Obtaining is respectively I simultaneously
1, I
2..., I
n, and calculate the difference △ I of maximum current and minimum current in the current flow of N number of compressor, and the current flow I to the N number of compressor obtained
1, I
2..., I
njudge with the difference △ I of the maximum current calculated and minimum current.
Wherein, when △ I does not reach △ Imax, and the outlet temperature T3 of the N number of air cooling heat exchanger obtained
1, T3
2..., T3
nall reach default defrost disengaging value, then directly controlled air-cooled heat pump cold-hot water machine and exit defrost pattern.
And work as the outlet temperature T3 of the N number of air cooling heat exchanger obtained
1, T3
2..., T3
nmiddle existence does not reach default defrost disengaging value, but the difference △ I of maximum current and minimum current has been more than or equal to △ Imax in the electric current of now N number of compressor, then show the impact due to the factor such as frosting or environment, the defrost of the water heating system in air-cooled heat pump cold-hot water machine is made to occur comparatively making great difference, water heating system may be had to occur the risk of hypertonia, therefore, the current flow I to N number of compressor is needed
1, I
2..., I
njudge, if the current flow of compressor is more than or equal to Imax, then control this compressor shutdown, occur high voltage protective to prevent this compressor.When other outlet temperature of not stopping air cooling heat exchanger corresponding to compressor of residue all reaches default defrost disengaging value, then control air-cooled heat pump cold-hot water machine and exit defrost pattern.
Further, as shown in Figure 2, the high voltage protective process that prevents of air-cooled heat pump cold-hot water machine comprises the following steps:
S101, enters defrost pattern.
S102, detects outdoor environment temperature T4 and leaving water temperature Tout, determines defrost disengaging value.
S103, obtains Imax and △ Imax according to outdoor environment temperature T4 and leaving water temperature Tout.
S104, judges whether the outlet temperature T3 of N number of air cooling heat exchanger all reaches default and exit defrost value.If so, step S109 is performed; If not, step S105 is performed.
S105, judges whether △ I is more than or equal to △ Imax.If so, step S106 is performed; If not, step S104 is returned.
S106, judges whether I is more than or equal to Imax, namely judges that whether there is I in the electric current of N number of compressor is more than or equal to Imax.If so, step S107 is performed; If not, step S104 is returned.
S107, controls corresponding compressor shutdown.
S108, judges whether remaining T3 corresponding to compressor that do not stop all reaches default and exit defrost value.If so, step S109 is performed; If not, step S105 is returned.
S109, exits defrost pattern.
In sum, high voltage protective method is prevented according to the air-cooled heat pump cold-hot water machine of the embodiment of the present invention, when air-cooled heat pump cold-hot water machine enters defrost pattern, detect the leaving water temperature Tout of outdoor environment temperature T4 and delivery port, and allow the difference △ I of maximum current and minimum current in the electric current of maximum Imax and the N number of compressor reached to allow the maximum △ Imax reached according to the electric current I of compressor during the machine execution defrost action of outdoor environment temperature T4 and leaving water temperature Tout acquisition air-cooled heat pump cold-hot water, perform in the process of defrost action at air-cooled heat pump cold-hot water machine, obtain the outlet temperature T3 of the air cooling heat exchanger in each water heating system, when there is T3 and not reaching default defrost disengaging value and △ I being more than or equal to △ Imax, if there is I to be more than or equal to Imax, then control this compressor shutdown corresponding to I being more than or equal to Imax, thus effectively prevent compressor from occurring high voltage protective, avoid compressor damage, improve Consumer's Experience.
Fig. 3 is the structural representation of air-cooled heat pump cold-hot water machine according to an embodiment of the invention.As shown in Figure 3, this air-cooled heat pump cold-hot water machine comprises: water cooling heat exchanger 10, N number of water heating system, temperature detecting module (not specifically illustrating in figure) and control module (not specifically illustrating in figure).
Wherein, water cooling heat exchanger 10 comprises water inlet and delivery port, and N number of water heating system shares water cooling heat exchanger 10, and each water heating system comprises compressor and air cooling heat exchanger, wherein, N be more than or equal to 2 integer.Temperature detecting module is used for the leaving water temperature Tout detecting outdoor environment temperature T4 when air-cooled heat pump cold-hot water machine enters defrost pattern and detect the mouth of a river, control module is used for obtaining the electric current I of compressor when air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of outdoor environment temperature T4 and delivery port and allows the maximum Imax reached, and the difference △ I obtaining maximum current and minimum current in the electric current of N number of compressor when air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of outdoor environment temperature T4 and delivery port allows the maximum △ Imax that reaches, and perform in the process of defrost action at air-cooled heat pump cold-hot water machine, control module obtains the outlet temperature T3 of the air cooling heat exchanger in each water heating system, when there is T3 and not reaching default defrost disengaging value and △ I being more than or equal to △ Imax, if there is I to be more than or equal to Imax, control module then controls this compressor shutdown corresponding to I being more than or equal to Imax, high voltage protective is there is to prevent this compressor.
It should be noted that, maximum Imax is with in certain outlet water temperature range within the scope of certain outdoor environment temperature, when air-cooled heat pump cold-hot water machine performs defrost action, allows the maximum that the electric current I of compressor reaches.Maximum △ Imax is with in certain outlet water temperature range within the scope of certain outdoor environment temperature, when air-cooled heat pump cold-hot water machine performs defrost action, and the maximum reached that in the electric current of N number of compressor, the difference △ I of maximum current and minimum current allows.
Specifically, as shown in Figure 3, when N equals 2, air-cooled heat pump cold-hot water machine comprises the first water heating system and the second water heating system, wherein, first water heating system can comprise compressor 11, cross valve 12, air cooling heat exchanger 13, restricting element 14 and gas-liquid separator 15, second water heating system can comprise compressor 21, cross valve 22, air cooling heat exchanger 23, restricting element 24 and gas-liquid separator 25.Air cooling heat exchanger 13 and air cooling heat exchanger 23 can be finned heat exchanger, and water cooling heat exchanger 10 can be double pipe heat exchanger.
When air-cooled heat pump cold-hot water machine is in refrigeration mode, in the first water heating system, liquid refrigerants in compressor 11 inhaling air liquid/gas separator 15 also pressurizes to export HTHP refrigerant to it, HTHP refrigerant flows into air cooling heat exchanger 13 after cross valve 12, by air cooling heat exchanger 13 to outdoor air heat release with dispensing liquid refrigerant, then after restricting element 14, water cooling heat exchanger 10 is entered, after liquid refrigerants absorbs the heat of the water flowing into water cooling heat exchanger 10, gas-liquid separator 15 is flowed back to by cross valve 12, wherein, water cooled in water cooling heat exchanger 10 can be desired zone again after secondary heat exchange provides cold.The refrigerant of the second water heating system flows to the first water heating system, is just not described in detail here.
When air-cooled heat pump cold-hot water machine is in heating mode, in the first water heating system, liquid refrigerants in compressor 11 inhaling air liquid/gas separator 15 also pressurizes to export HTHP refrigerant to it, HTHP refrigerant flows into water cooling heat exchanger 10 after cross valve 12, heat release is carried out with dispensing liquid refrigerant to the water flowing into water cooling heat exchanger 10, through restricting element 14 laggard enter air cooling heat exchanger 13, by the heat in air cooling heat exchanger 13 absorption chamber outer air, then gas-liquid separator 15 is flowed back to by cross valve 12, wherein, after secondary heat exchange, be can be desired zone again by the water heated in water cooling heat exchanger 10 and heat is provided.The refrigerant of the second water heating system flows to the first water heating system, is just not described in detail here.
When air-cooled heat pump cold-hot water machine is in heating mode, due to when refrigerant enters air cooling heat exchanger by the heat in absorption chamber outer air, thus make air cooling heat exchanger occur frosting situation, therefore need to carry out defrost.When air-cooled heat pump cold-hot water machine carries out defrost; due to the existence of refrigerating medium; be easy to occur high voltage protective; therefore; in an embodiment of the present invention; when air-cooled heat pump cold-hot water machine enters defrost pattern, before defrost action starts, control module first selects suitable maximum Imax and maximum △ Imax according to the leaving water temperature Tout of the outdoor environment temperature T4 detected and delivery port.After execution defrost action, the outlet temperature of the N number of air cooling heat exchanger of control module Real-time Obtaining and the electric current of N number of compressor, and the difference △ I of maximum current and minimum current in the outlet temperature of N number of air cooling heat exchanger and the electric current of N number of compressor is judged.When after defrost a period of time, if there is the defrost disengaging value not reaching default in the outlet temperature of N number of air cooling heat exchanger, and there is △ I >=△ Imax, then represent the impact due to the factor such as frosting or environment, the defrost of the water heating system in air-cooled heat pump cold-hot water machine is made to occur comparatively making great difference, water heating system may be had to occur the risk of hypertonia, therefore, the electric current of control module to N number of compressor is needed to judge further, if judge that the electric current of compressor is more than or equal to Imax, then control module controls this compressor shutdown, high voltage protective is there is to prevent this compressor.
According to one embodiment of present invention, temperature detecting module comprises the outdoor temperature sensor for detecting outdoor environment temperature T4 and the leaving water temperature sensors for detecting coolant-temperature gage Tout, and wherein, leaving water temperature sensors is arranged on water outlet.
According to one embodiment of present invention; after controlling the compressor shutdown corresponding to this I being more than or equal to Imax; if the T3 not stopping water heating system corresponding to compressor all reaches default defrost disengaging value, control module then controls air-cooled heat pump cold-hot water machine and exits described defrost pattern.
That is; in execution defrost course of action; if judge that the electric current of compressor is more than or equal to Imax; then directly control this compressor shutdown; until the outlet temperature of not stopping air cooling heat exchanger corresponding to compressor all reaches default defrost disengaging value, then control air-cooled heat pump cold-hot water machine and exit defrost pattern.
According to one embodiment of present invention, when the T3 of each water heating system all reaches default defrost disengaging value, control module controls air-cooled heat pump cold-hot water machine and exits defrost pattern.
Be understandable that, in execution defrost course of action, if the defrost of N number of water heating system is more or less the same, △ I is then there will not be to be more than or equal to the situation of △ Imax, therefore, when the T3 of each water heating system all reaches default defrost disengaging value, control air-cooled heat pump cold-hot water machine and exit defrost pattern.
Particularly, after air-cooled heat pump cold-hot water machine enters defrost pattern, outdoor temperature sensor detects outdoor environment temperature T4, leaving water temperature sensors detects the leaving water temperature Tout at the mouth of a river, and the electric current I that control module obtains compressor according to the outdoor environment temperature T4 detected and leaving water temperature Tout allows the difference △ I of maximum current and minimum current in the electric current of maximum Imax and the N number of compressor reached to allow the maximum △ Imax reached.
After air-cooled heat pump cold-hot water machine starts to perform defrost action, the outlet temperature of the N number of air cooling heat exchanger of control module Real-time Obtaining is respectively T3
1, T3
2..., T3
n, and the outlet temperature T3 to the N number of air cooling heat exchanger obtained
1, T3
2..., T3
njudge, the current flow of the N number of compressor of control module Real-time Obtaining is respectively I simultaneously
1, I
2..., I
n, and calculate the difference △ I of maximum current and minimum current in the current flow of N number of compressor, and the current flow I to the N number of compressor obtained
1, I
2..., I
njudge with the difference △ I of the maximum current calculated and minimum current.
Wherein, when △ I does not reach △ Imax, and the outlet temperature T3 of the N number of air cooling heat exchanger obtained
1, T3
2..., T3
nall reached default defrost disengaging value, then control module directly controls air-cooled heat pump cold-hot water machine and exits defrost pattern.
And work as the outlet temperature T3 of the N number of air cooling heat exchanger obtained
1, T3
2..., T3
nmiddle existence does not reach default defrost disengaging value, but the difference △ I of maximum current and minimum current has been more than or equal to △ Imax in the electric current of now N number of compressor, then show the impact due to the factor such as frosting or environment, the defrost of the water heating system in air-cooled heat pump cold-hot water machine is made to occur comparatively making great difference, water heating system may be had to occur the risk of hypertonia, therefore, need control module to the current flow I of N number of compressor
1, I
2..., I
njudge, if the current flow of compressor is more than or equal to Imax, then control module controls this compressor shutdown, occurs high voltage protective to prevent this compressor.When other outlet temperature of not stopping air cooling heat exchanger corresponding to compressor of residue all reaches default defrost disengaging value, then control module controls air-cooled heat pump cold-hot water machine and exits defrost pattern.
Further, air-cooled heat pump cold-hot water machine prevent high voltage protective process as shown in Figure 2, be not described in detail here.
According to the air-cooled heat pump cold-hot water machine of the embodiment of the present invention, the leaving water temperature Tout of the outdoor environment temperature T4 that control module detects according to temperature detecting module and delivery port obtains the electric current I of compressor when air-cooled heat pump cold-hot water machine performs defrost action and allows the difference △ I of maximum current and minimum current in the electric current of maximum Imax and the N number of compressor reached to allow the maximum △ Imax reached, and perform in the process of defrost action at air-cooled heat pump cold-hot water machine, obtain the outlet temperature T3 of the air cooling heat exchanger in each water heating system, when there is T3 and not reaching default defrost disengaging value and △ I being more than or equal to △ Imax, if there is I to be more than or equal to Imax, then control this compressor shutdown corresponding to I being more than or equal to Imax, thus effectively prevent compressor from occurring high voltage protective, avoid compressor damage, improve Consumer's Experience.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (7)
1. an air-cooled heat pump cold-hot water machine prevent high voltage protective method; it is characterized in that; described air-cooled heat pump cold-hot water machine comprises N number of water heating system; N be more than or equal to 2 integer; described N number of water heating system shares a water cooling heat exchanger; each water heating system comprises compressor and air cooling heat exchanger, and described water cooling heat exchanger comprises water inlet and delivery port, described in prevent high voltage protective method from comprising the following steps:
When described air-cooled heat pump cold-hot water machine enters defrost pattern, detect outdoor environment temperature T4, and detect the leaving water temperature Tout of described delivery port;
Obtain the electric current I of compressor when described air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of described outdoor environment temperature T4 and described delivery port and allow the maximum Imax reached, and the difference △ I obtaining maximum current and minimum current in the electric current of N number of compressor when described air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of described outdoor environment temperature T4 and described delivery port allows the maximum △ Imax that reaches;
Perform at described air-cooled heat pump cold-hot water machine in the process of defrost action, obtain the outlet temperature T3 of the air cooling heat exchanger in each water heating system;
When there is T3 and do not reach default defrost disengaging value and △ I being more than or equal to △ Imax, if there is I to be more than or equal to Imax, then control this compressor shutdown corresponding to I being more than or equal to Imax, occur high voltage protective to prevent this compressor.
2. air-cooled heat pump cold-hot water machine according to claim 1 prevent high voltage protective method; it is characterized in that; after controlling the compressor shutdown corresponding to this I being more than or equal to Imax; if the T3 not stopping water heating system corresponding to compressor all reaches described default defrost disengaging value, then control described air-cooled heat pump cold-hot water machine and exit described defrost pattern.
3. air-cooled heat pump cold-hot water machine according to claim 1 prevent high voltage protective method, it is characterized in that, when the T3 of each water heating system all reaches described default defrost disengaging value, control described air-cooled heat pump cold-hot water machine and exit described defrost pattern.
4. an air-cooled heat pump cold-hot water machine, is characterized in that, comprising:
Water cooling heat exchanger, described water cooling heat exchanger comprises water inlet and delivery port;
N number of water heating system, described N number of water heating system shares described water cooling heat exchanger, and each water heating system comprises compressor and air cooling heat exchanger, wherein, N be more than or equal to 2 integer;
Temperature detecting module, for detecting the leaving water temperature Tout of outdoor environment temperature T4 and the described delivery port of detection when described air-cooled heat pump cold-hot water machine enters defrost pattern;
Control module, the maximum Imax that reaches is allowed for obtaining the electric current I of compressor when described air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of described outdoor environment temperature T4 and described delivery port, and the difference △ I obtaining maximum current and minimum current in the electric current of N number of compressor when described air-cooled heat pump cold-hot water machine performs defrost action according to the leaving water temperature Tout of described outdoor environment temperature T4 and described delivery port allows the maximum △ Imax that reaches, and perform in the process of defrost action at described air-cooled heat pump cold-hot water machine, described control module obtains the outlet temperature T3 of the air cooling heat exchanger in each water heating system,
Wherein, when there is T3 and not reaching default defrost disengaging value and △ I being more than or equal to △ Imax; if there is I to be more than or equal to Imax, described control module then controls this compressor shutdown corresponding to I being more than or equal to Imax, occurs high voltage protective to prevent this compressor.
5. air-cooled heat pump cold-hot water machine according to claim 4; it is characterized in that; after controlling the compressor shutdown corresponding to this I being more than or equal to Imax; if the T3 not stopping water heating system corresponding to compressor all reaches described default defrost disengaging value, described control module then controls described air-cooled heat pump cold-hot water machine and exits described defrost pattern.
6. air-cooled heat pump cold-hot water machine according to claim 4, is characterized in that, when the T3 of each water heating system all reaches described default defrost disengaging value, described control module controls described air-cooled heat pump cold-hot water machine and exits described defrost pattern.
7. air-cooled heat pump cold-hot water machine according to claim 4, it is characterized in that, described temperature detecting module comprises the outdoor temperature sensor for detecting described outdoor environment temperature T4 and the leaving water temperature sensors for detecting described leaving water temperature Tout, wherein, described leaving water temperature sensors is arranged on described water outlet.
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| CN105299988B (en) | 2017-07-28 |
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