CN102042660B - Air conditioner - Google Patents
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- CN102042660B CN102042660B CN 201010518232 CN201010518232A CN102042660B CN 102042660 B CN102042660 B CN 102042660B CN 201010518232 CN201010518232 CN 201010518232 CN 201010518232 A CN201010518232 A CN 201010518232A CN 102042660 B CN102042660 B CN 102042660B
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Abstract
The present invention provides an air conditioner which stops operation at the occasion when the water supply is stopped in operation or no water is supplied in compressor starting for preventing freezing. Refrigerant tubes (10,11) for the air conditioner are connected with an outdoor unit (1) and an indoor unit (23). The outdoor unit (1) is provided with a plate type heat exchanger (4), a compressor (2) and an outdoor expansion valve (5). The plate type heat exchanger (4) is provided with a plate for flowing of water and a plate for flowing of refrigerant. The indoor unit (23) is provided with an indoor heat exchanger (25), wherein: a temperature sensor (9) for measuring the temperatures of the plate for flowing and water and the plate for flowing of refrigerant is provided on a side surface of the plate type heat exchanger. At the occasion that the value of the temperature sensor is below a preset value, the operation of the compressor is stopped.
Description
Technical field
The present invention relates to a kind of air conditioner, this air conditioner has the heat source side heat exchanger take water as thermal source, and the water in this heat source side heat exchanger internal flow is carried out freeze protection, the invention particularly relates to the air conditioner that is suitable for heat-exchangers of the plate type.
Background technology
In recent years, environmental problem becomes the problem of global scale, as a solution, can list energy-saving.In the air conditioner with the heat source side heat exchanger take water as thermal source, can not utilize thermal source (underground water, from heat extraction of equipment etc.).In addition, carry out the occasion of heat exchange between water and cold-producing medium, heat exchange efficiency is good, and energy saving is higher than the general air conditioner take air as thermal source, and carrying capacity of environment is low.On the other hand, this heat exchanger carries out heat exchange between water and cold-producing medium, so, become negative such as refrigerant temperature, then water freezes, and has tied the water that freezes and has expanded in heat exchanger, has the danger that makes the heat exchanger breakage.
In patent documentation 1, put down in writing such technology, namely, in the air conditioner of multichamber type, each refrigerant gas side at heat exchanger arranges thermistor, refrigerant gas temperature according to having been measured by thermistor determines whether that water flows to heat exchanger fully, in the occasion of judging that water fully flows, send the operation halt instruction to compression unit, prevent freezing of heat exchanger.
In patent documentation 2, put down in writing such technology, namely, in refrigerating plant, the hot and cold water outlet of flowing out at the hot and cold water of heat-exchangers of the plate type nearby arranges freezes to prevent sensor, detects the temperature that the hot and cold water temperature becomes the hot and cold water outlet of minimum temperature, judges freezing of cold water, the operation of control compressor etc., thus prevent freezing of cold water.
No. 4186492 communiques of [patent documentation 1] Japan Patent
[patent documentation 2] TOHKEMY 2005-188765 communique
Summary of the invention
Yet, the air conditioner of above-mentioned patent documentation 1 is failed as being in operation for feedwater, then liquid refrigerant can not with the water heat exchange, liquid refrigerant is trapped in the heat exchanger, so, corresponding to the aperture of evaporability adjustment outdoor expansion valve, the cold-producing medium of heat exchanger outlet is controlled to be the gas of certain degree of superheat.For this reason, the flue temperature of heat exchanger outlet does not descend immediately, and only refrigerant temperature descends, and the water before Protection in the heat exchanger freezes.
In addition, the refrigerating plant of above-mentioned patent documentation 2 can not flow to for the occasion water of feedwater the hot and cold water outlet, so, can not measure the correct water temperature of heat exchanger inside, the load change of air conditioner etc. causes the occasion that refrigerant temperature has sharply descended after just cutout of water, can not judge freezing of cold water.
The object of the invention is to obtain such air conditioner, this air conditioner can be in running have when the occasion that disappeared of the supply of water and compressor start the occasion of supply of water out of service, prevents from freezing.
Another object of the present invention is to obtain such air conditioner, this air conditioner can not have the occasion of the supply of water not bring into operation before compressor start, prevents from freezing.
In order to address the above problem, use in refrigeration system refrigerant piping of the present invention connects off-premises station and indoor set, this off-premises station is provided with heat-exchangers of the plate type, compressor, outdoor expansion valve, and this heat-exchangers of the plate type has the plate that plate that water flows through and cold-producing medium flow through, and this indoor set is provided with indoor heat converter; It is characterized in that: the side at above-mentioned heat-exchangers of the plate type is provided with temperature sensor, the temperature of the plate that the plate that flows through with the above-mentioned water of above-mentioned temperature sensor measurement and above-mentioned cold-producing medium flow through, be occasion below the setting in the value of said temperature sensor, stop the operation of above-mentioned compressor.
Preferably the said temperature sensor setting is in such part, and this part is being the gas-liquid two-phase cold-producing medium part of accumulating, is being not the part that liquid refrigerant accumulates to above-mentioned heat-exchangers of the plate type for the occasion of feedwater for the occasion of feedwater to above-mentioned heat-exchangers of the plate type.
In addition, the said temperature sensor preferably is located at such position, and this position more is in downside than the approximate centre of the short transverse of above-mentioned heat-exchangers of the plate type, and the above-mentioned refrigerant piping that flows into above-mentioned heat-exchangers of the plate type than cold-producing medium more is in upside.
Another use in refrigeration system refrigerant piping of the present invention connects off-premises station and indoor set, this off-premises station is provided with heat-exchangers of the plate type, compressor, outdoor expansion valve, this heat-exchangers of the plate type has the plate that plate that water flows through and cold-producing medium flow through, and this indoor set is provided with indoor heat converter; It is characterized in that: the side at above-mentioned heat-exchangers of the plate type is provided with temperature sensor, the temperature of the plate that the plate that flow through with the above-mentioned water of above-mentioned temperature sensor measurement before above-mentioned compressor brings into operation and above-mentioned cold-producing medium flow through, be occasion more than the setting in the value of said temperature sensor, above-mentioned compressor is brought into operation.
In addition, also can be provided with a plurality of above-mentioned indoor sets.
According to the present invention, side at heat-exchangers of the plate type is provided with temperature sensor, the temperature of the plate that the plate that flows through with temperature sensor measurement water and cold-producing medium flow through, be occasion below the setting in the value of this temperature sensor, stop the operation of compressor, so, there is not the occasion of supply of water out of service when the supply of water becomes the occasion that do not had and compressor start in running, can prevent from freezing.
In addition, the temperature of the plate that the plate that flow through with temperature sensor measurement water before the compressor starts operation and cold-producing medium flow through, be occasion more than the setting in the value of temperature sensor, make the compressor starts operation, so, before compressor start, do not have the occasion of the supply of water not bring into operation, can prevent from freezing.
Description of drawings
Fig. 1 is the freeze cycle pie graph of the embodiment of the invention 1.
Fig. 2 is the figure of the relation of the refrigerant pressure of expression heat source side heat exchanger and refrigerant temperature.
Fig. 3 is the pie graph of the heat source side surroundings of the embodiment of the invention 1.
The figure of the variations in temperature when Fig. 4 freezes for the heat source side heat exchanger that represents prior art.
The figure of the variations in temperature when Fig. 5 freezes for the heat source side heat exchanger that represents the embodiment of the invention 1.
Fig. 6 is the figure of the temperature sensor installed surface of the heat source side heat exchanger of the expression embodiment of the invention 1.
Fig. 7 for state from expression to the heat source side heat exchanger water flowing of the embodiment of the invention 1 and the figure of the refrigerant condition of the short transverse of the heat source side heat exchanger under the state of cutting off the water supply.
Fig. 8 for state from expression to the heat source side heat exchanger water flowing of the embodiment of the invention 1 and the figure of the temperature characterisitic of the temperature sensor installation site C section under the state of cutting off the water supply.
Fig. 9 for state from expression to the heat source side heat exchanger water flowing of the embodiment of the invention 1 and the figure by the temperature characterisitic of part of the heat source side heat exchanger under the state of cutting off the water supply.
Figure 10 is the flow chart of the control of the freeze protection of the explanation embodiment of the invention 2.
Description of reference numerals
1 off-premises station
2 compressors
3 cross valves
4 heat source side heat exchangers
5 outdoor expansion valves
6 accumulators
7 high-pressure sensors
8 low-pressure sensors
9 temperature sensors
10 gas refrigerant pipe arrangements
11 liquid refrigerant pipe arrangements
15 water pipe arrangements
20 control parts
21 gas connecting pipings (refrigerant piping)
22 liquid connecting pipings (refrigerant piping)
23 indoor sets
24 indoor expansion valves
25 indoor heat converters
26 indoor blower
27 refrigerant inlet ozzles
28 refrigerant outlet ozzles
The specific embodiment
Embodiments of the invention are described with reference to the accompanying drawings.
[embodiment 1]
Fig. 1 is the freeze cycle pie graph of the air conditioner 1 of present embodiment.Off-premises station 1 and 2 indoor sets 23 that air conditioner is connected as heat source unit by liquid connecting pipings 22, gas connecting pipings 21.Indoor set 23 can be 1, also can be many.Off-premises station 1 has with frequency converter running frequency is carried out the compressor 2 of the volume-variable formula of variable control, connects compressor 2 and cross valve 3.Low-pressure side at compressor 2 is provided with accumulator 6.Cross valve 3 usefulness gas refrigerant pipe arrangements 10 are connected with heat source side heat exchanger 4.Heat source side heat exchanger 4 is connected with outdoor expansion valve with 11 connections of liquid refrigerant pipe arrangement.
As thermal source, heat source side heat exchanger 4 uses heat-exchangers of the plate type as shown in Figure 3 to heat source unit with water.At this heat source side heat exchanger 4, outside for feedwater from the unit by water pipe arrangement 15, and cold-producing medium between heat exchange.This water is adjusted in the mode that temperature and flow are in prescribed limit, carries from boiler, cold water equipment.
In addition, have high-pressure sensor 7 in the high-pressure side of compressor 2, have low-pressure sensor 8 in low-pressure side, be provided with temperature sensor 9 in the side of heat source side heat exchanger 4.
At first, the process that heat source side heat exchanger 4 freezes is described.When heating, heat source side heat exchanger 4 becomes evaporimeter, and the cold-producing medium of low-temp low-pressure flows into, from the water heat absorption supplied with by external equipment and evaporate.Water is absorbed heat and the temperature reduction.
As shown in Figure 2, the refrigerant temperature of heat exchanger entrance exists with ... pressure, and this pressure is substantially identical with the low pressure of compressor value.Can think that the minimum temperature of the water that heat exchanger is interior is the value identical with this refrigerant temperature.Here, be equipped with the negative pressure of refrigerant temperature change and be P1, keep P1 to control compressor frequency during operation abovely.General guard method is, in case for example low pressure is lower than P1, then reduces compressor frequency, and low pressure is returned to more than the P1.
Yet, can be the occasion that supplying temperature, flow are in the water of prescribed limit with the occasion of above-mentioned means protection.The supply of water become the occasion that do not had, become the occasion below the regulation scope of application, even compressor frequency is reduced to lower limit, low pressure also drops to and is lower than P1.As a result, it is negative that refrigerant temperature becomes, and water freezes, and heat exchanger is damaged.In this occasion, need to stop the operation of compressor.
Below, the freeze protection method of present embodiment is described.Fig. 3 represents heat-exchangers of the plate type 4 and figure on every side thereof.The flowing when heating of flowing of cold-producing medium.As correlation technique, the gas refrigerant pipe arrangement 10 set temperature sensors at heat exchanger outlet are arranged, the value of the temperature T 10 of having used by this temperature sensor measurement is carried out the method for freeze protection.Yet, the occasion that the supply of the water that is in operation becomes and do not had, as shown in Figure 4; the supply of water become do not had in, refrigerant temperature and water temperature descend, but flue temperature T 10 does not descend immediately; descend but postpone, so, can not carry out well freeze protection.This is because as the feature of the internal structure of heat-exchangers of the plate type, top becomes gas easily, and adjusts the aperture of outdoor expansion valve corresponding to evaporability, the cold-producing medium of heat exchanger outlet is controlled to be the gas of certain degree of superheat.In the occasion that the supply of water becomes and do not had, evaporability descends, and for this reason, the aperture of outdoor expansion valve 5 diminishes, and circulating mass of refrigerant descends.Because the rate of climb of the liquid in the heat-exchangers of the plate type is suppressed, so flue temperature T 10 does not descend immediately.For this reason, in the occasion of freezing that will judge according to the decline of flue temperature T 10 water, when flue temperature T 10 had just begun to descend, it is negative that refrigerant temperature has become, water generates freeze.
Therefore, in the present embodiment, the assigned position set temperature sensor 9 in the side of heat-exchangers of the plate type 4 carries out freeze protection according to the temperature T 9 of being measured by this temperature sensor 9.Heat-exchangers of the plate type 4 is overlapping which floor laminal heat exchanger of being consisted of by stainless steel etc., the plate of water flow and the plate of flow of refrigerant are replaced, so, side at heat-exchangers of the plate type 4, the plate of water flow and the plate of flow of refrigerant are exposed, and temperature sensor 9 arranges contiguously with both sides' plate.Therefore, temperature sensor 9 is arranged on the face of the temperature effect that is subject to water and cold-producing medium, measures the temperature that has reflected water and cold-producing medium both sides.During water flow, water and cold-producing medium heat exchange, T9 becomes the temperature near water.Supply such as water disappears, then near the temperature of cold-producing medium, so when the supply of water had disappeared, T9 and refrigerant temperature and water temperature similarly descended.The variations in temperature of this occasion is shown in Fig. 5.In case as so that T9 drop to the value of regulation, for example 2 ℃ just out of service, the temperature of the water that then temperature is higher than cold-producing medium can not become negative, can prevent freezing of sealing.
Do not stop in order not protect in the occasion that normally supplies water, the occasion that does not only have in the supply of water is more correctly protected and is stopped, and the position of the short transverse of temperature sensor 9 is described.
Fig. 6 represents the position of temperature sensor installed surface.Carried in reality under the state of heat-exchangers of the plate type 4, installed surface is the face of the vertical direction vertical with the face of refrigerant outlet ozzle 28 with there being refrigerant inlet ozzle 27.At this face, water and cold-producing medium alternately flow, and can measure the temperature that has reflected water and cold-producing medium both sides.In the present embodiment, be made as the downside more than the total length (H) of the short transverse of heat-exchangers of the plate type 4 half (H/2), than refrigerant inlet ozzle 27 scope of upside more.As shown in Figure 6, be oblique line two faces partly.
Fig. 7 is divided into A～D section with the short transverse of heat-exchangers of the plate type 4, the refrigerant condition in the expression heat exchanger.State I is the state when normally carrying out the supply of water.State I V is the state that the supply of water has stopped, the state before the water in the expression heat exchanger will begin to freeze.
A section is the position that the state of cold-producing medium becomes gas often, near the top of heat-exchangers of the plate type 4 and refrigerant outlet ozzle 28, and air inclusion refrigerant piping 10.B section is the position that the state of cold-producing medium becomes gas-liquid two-phase often.C section is that the state of cold-producing medium is two-phase in state I, becomes the position of liquid at state I V.Than heat exchanger total length H roughly half more be in the below, until the upside of refrigerant inlet ozzle 27.D section is the position that the state of cold-producing medium becomes liquid often, from the upside of refrigerant inlet ozzle 27 to the heat exchanger foot, comprises the liquid refrigerant pipe arrangement 11 as refrigerant inlet.In the present embodiment, circulation when heating operation is described is made as refrigerant inlet ozzle 27 and refrigerant outlet ozzle 28, but when refrigerating operaton, cold-producing medium flows out from refrigerant inlet ozzle 27, and cold-producing medium flow into heat-exchangers of the plate type 4 from refrigerant outlet ozzle 28.
Heat-exchangers of the plate type is because the sectional area of flow direction is large, so the flow velocity of cold-producing medium is slack-off.Because cold-producing medium flows from bottom to top, so the liquid refrigerant in the two-phase system cryogen is difficult to rise, and separates with gas refrigerant, only liquid refrigerant is trapped in the bottom easily.In addition, because internal volume is very little, so, as the flow of refrigerant that is not evaporated comes, then heat exchanger was full of by liquid refrigerant in moment.As being full of by liquid refrigerant, then volatility further descends, and becomes to recover.For not like this, monitor the temperature of the pipe arrangement of heat exchanger outlet, for the flow of refrigerant that only allows to be evaporated, the aperture of outdoor expansion valve is adjusted.In the present embodiment, utilized the feature of this heat-exchangers of the plate type.At state I V, the supply of water becomes and does not have, and can not obtain evaporability, and for this reason, the cold-producing medium that can not evaporate increases, and is trapped in the bottom of heat-exchangers of the plate type 4.Be failure to actuate such as outdoor expansion valve 5, then liquid accumulates the top of heat-exchangers of the plate type 4 immediately, is filled to A section by two-phase or liquid refrigerant, but in fact closes the control of outdoor expansion valve 5, minimizing refrigerant flow.Like this, A section was full of by gas refrigerant in very short time, and temperature does not descend.In C section, owing to being gas-liquid two-phase in state I, V is full of by liquid refrigerant in state I, so temperature sharply descends.In the present embodiment, at this C section set temperature sensor 9, in case the value of temperature sensor 9 is lower than setting, then out of service.
Below, the reason that the surface temperature of C section under state I V sharply descends is described.
Fig. 8 represents the impact that water and cold-producing medium produce temperature sensor 9.As an example, the interior refrigerant temperature of heat exchanger of establishing state I is 1 ℃, and water temperature is 9 ℃, and the refrigerant temperature in the heat exchanger under the state I V is 0 ℃, and water temperature is 8 ℃.The surface temperature of the heat exchanger of set temperature sensor 9 is subject to inner cold-producing medium and the impact of water.At first, under state I, cold-producing medium is gas-liquid two-phase.Under the state I V that the supply of water has disappeared, cold-producing medium becomes liquid.The ratio of heat capacities two-phase system cryogen of liquid refrigerant is large.In addition, owing to water stops, so the thermal conductivity factor of water descends.Under this state, the surface temperature of heat exchanger is subjected to the impact of temperature of refrigerant side very large, near the temperature of cold-producing medium.According to above characteristic, when C section had disappeared in the supply of water, temperature significantly descended.
Fig. 9 represents the temperature of the A of heat-exchangers of the plate type 4～D section by state classification.
Determine the temperature (protection value) of the regulation of freeze protection, by dotted line it is represented.State I and II are the occasion that normally supplies feedwater, here can not protect.
State I is water when flowing into heat-exchangers of the plate type 4 stable, and which place of expression A～D section all than the high temperature of protection value, does not protect to stop.
When state I I represents transition.Air conditioner is as bringing into operation or load change occuring, and then low pressure descends for the moment sometimes, descends such as low pressure, and then refrigerant temperature also descends.Particularly load change occurs in the occasion of required power easily as the air conditioner of the multichamber type that is used for mansion etc.When the large occasion of load change of in the present embodiment, establishing air conditioner is transition.For the occasion of measuring temperature in A～C section, because for feedwater, gas or two-phase system cryogen exist, and are subjected to the impact of water temperature large, so temperature does not descend a lot.Yet the cold-producing medium of D section has liquid or mass dryness fraction is low, near the cold-producing medium of liquid, compares water temperature; the impact that is subject to refrigerant temperature is larger, so, at the drop in temperature of cold-producing medium to being lower than the occasion of the temperature of protection value; even for feedwater, also protect to stop.
State I II and IV are the occasion that does not have the supply of water, and here needing protection stops.
State I II is illustrated in the occasion of having started under the state for feedwater.In this occasion, although whether A section and B section drop in temperature drop to protection value and uncertain, exist and do not protect the danger that stops.
The occasion that supply that state I V is illustrated in water in service has disappeared.In this occasion, as Fig. 4 and Fig. 7 explanation, the temperature of A section does not descend substantially, and the temperature of B section does not have decline to reach the degree of protection value yet.On the other hand, C section and D section are owing to be full of liquid refrigerant, and temperature sharply descends.
As seen from the above description, in C section, do not protect during for feedwater to stop, can only when the supply of water has disappeared, correctly detecting it, protect to stop.In the present embodiment, utilize this characteristic at C section set temperature sensor 9, carry out freeze protection.Although understand and to be in half height and position of heat-exchangers of the plate type 4 and to be in the more C section of the position of top of the refrigerant inlet ozzle 27 that flows into than liquid refrigerant, but as long as be such zone, this zone for the occasion of feedwater for becoming gas-liquid two-phase, the occasion liquid refrigerant that has disappeared in the supply of water accumulates.
In the occasion of multi-room air conditioner, in the time of must considering the large transition of load change (state I I), so the suitable setting place of temperature sensor 9 is C section as described above.Yet, for example in the occasion that indoor set only is 1, load change is little, be difficult to become state I I, so, even be D section, can not be lower than the protection value during water flowing yet.Therefore, also can be at D section set temperature sensor 9.
[embodiment 2]
In addition, use the temperature sensor 9 of C section, before the operation of compressor begins, detect whether just supplying with the water of set point of temperature scope, as be outside the prescribed limit, then do not bring into operation, thereby also can protect heat-exchangers of the plate type 4 not freezed to affect.
Figure 10 represents the flow chart of control of the freeze protection of present embodiment.At first, before compressor start, determine whether the water (S1) of the temperature range of just supplying with regulation.Temperature such as water is low, is in outside the scope of application, does not then bring into operation.As in the scope of application, (S2) then brings into operation.
After just bringing into operation, dropped to the cumulative time that is used for below the protection value of freezing to prevent in order to hold, the time started is measured (S4).Then, whether freeze in order to judge water, measure temperature T 9, judge whether it is lower than the i.e. protection value of value (S5) of regulation.The protection value is such as being set as 2 ℃ etc.Be in the occasion more than the set point of temperature, time measurement is resetted (S3), the time started is measured (S4) once again, continues operation.Be in occasion below the set point of temperature at T9, whether continue continuously in order to judge its state, judge whether the time measurement that has begun at S3 has passed through the stipulated time (S6).Like this, be in below the set point of temperature and passed through the occasion (S7) out of service of stipulated time at T9.Owing to judge that in the occasion that the temperature that is lower than the protection value has continued a period of time operation stops, for this reason, in error detection occasion or the occasion that exists unexpected refrigerant temperature to descend for the moment, stop even can preventing from just also protecting for feedwater.
Claims (5)
1. air conditioner, connect off-premises station and indoor set with refrigerant piping, this off-premises station is provided with heat-exchangers of the plate type, compressor and outdoor expansion valve, and this heat-exchangers of the plate type has the second plate that the first plate that water flows through and cold-producing medium flow through, and this indoor set is provided with indoor heat converter; It is characterized in that: the face in the vertical direction vertical with the face of refrigerant outlet ozzle with there being the refrigerant inlet ozzle of described heat-exchangers of the plate type is provided with temperature sensor, the temperature that has reflected the cold-producing medium both sides of the water of described the first plate and described the second plate with described temperature sensor measurement, be occasion below the setting in the value of described temperature sensor, stop the operation of described compressor.
2. air conditioner according to claim 1, it is characterized in that: described temperature sensor is arranged on such part, this part is being the part that the gas-liquid two-phase cold-producing medium accumulates to described heat-exchangers of the plate type for the occasion that feeds water, and is being not the part that liquid refrigerant accumulates to described heat-exchangers of the plate type for the occasion that feeds water.
3. air conditioner according to claim 1, it is characterized in that: described temperature sensor is located at such position, this position than the approximate centre of the short transverse of described heat-exchangers of the plate type more be in downside, the described refrigerant piping that flows into described heat-exchangers of the plate type than cold-producing medium more is in upside.
4. air conditioner, connect off-premises station and indoor set with refrigerant piping, this off-premises station is provided with heat-exchangers of the plate type, compressor and outdoor expansion valve, and this heat-exchangers of the plate type has the second plate that the first plate that water flows through and cold-producing medium flow through, and this indoor set is provided with indoor heat converter; It is characterized in that: the face in the vertical direction vertical with the face of refrigerant outlet ozzle with there being the refrigerant inlet ozzle of described heat-exchangers of the plate type is provided with temperature sensor, the temperature that before the operation of described compressor starts, has reflected the cold-producing medium both sides of the water of described the first plate and described the second plate with described temperature sensor measurement, be occasion more than the setting in the value of described temperature sensor, make described compressor starts operation.
5. a multi-room air conditioner is characterized in that: in the described air conditioner of any one in claim 1～4, be provided with a plurality of described indoor sets.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009242934A JP5492523B2 (en) | 2009-10-22 | 2009-10-22 | Air conditioner |
| JP2009-242934 | 2009-10-22 |
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| CN102042660A CN102042660A (en) | 2011-05-04 |
| CN102042660B true CN102042660B (en) | 2013-10-30 |
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| JP (1) | JP5492523B2 (en) |
| CN (1) | CN102042660B (en) |
| BR (1) | BRPI1004134B1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013057426A (en) * | 2011-09-07 | 2013-03-28 | Hitachi Appliances Inc | Plate-type heat exchanger and freezing cycle device with the same |
| JP5820232B2 (en) * | 2011-10-25 | 2015-11-24 | アズビル株式会社 | Surface temperature estimation device, surface temperature estimation method, and dew condensation determination device |
| JP5500161B2 (en) * | 2011-12-16 | 2014-05-21 | 三菱電機株式会社 | Refrigeration cycle equipment |
| JP5897154B2 (en) * | 2013-01-08 | 2016-03-30 | 三菱電機株式会社 | Air conditioner |
| JP6477415B2 (en) * | 2015-10-26 | 2019-03-06 | 富士電機株式会社 | Heat pump type steam generator and method for starting heat pump type steam generator |
| CN109373513B (en) * | 2018-10-29 | 2021-07-16 | 宁波奥克斯电气股份有限公司 | Control method and device for preventing chassis from being frozen and air conditioner |
| JP6947314B2 (en) * | 2018-12-28 | 2021-10-13 | 三菱電機株式会社 | Plate heat exchanger and heat pump device |
| CN113661364B (en) * | 2019-04-18 | 2023-03-10 | 三菱电机株式会社 | Control device for air conditioner, outdoor unit, relay unit, heat source unit, and air conditioner |
| WO2021009924A1 (en) * | 2019-07-18 | 2021-01-21 | 三菱電機株式会社 | Air conditioning device |
| JP7203072B2 (en) * | 2020-11-11 | 2023-01-12 | 株式会社長府製作所 | Heat extraction system |
| CN114294784B (en) * | 2021-12-28 | 2023-08-01 | 中山市爱美泰电器有限公司 | Defrosting control method for heat pump unit and heat pump unit |
| CN115355648B (en) * | 2022-07-08 | 2024-01-09 | 珠海格力电器股份有限公司 | Control method and device for multi-module water chilling unit |
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| JP2007024320A (en) * | 2005-07-12 | 2007-02-01 | Hitachi Ltd | Refrigerating device |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4186492B2 (en) * | 2002-03-29 | 2008-11-26 | ダイキン工業株式会社 | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102042660A (en) | 2011-05-04 |
| JP2011089690A (en) | 2011-05-06 |
| BRPI1004134A8 (en) | 2016-11-08 |
| BRPI1004134B1 (en) | 2020-07-07 |
| JP5492523B2 (en) | 2014-05-14 |
| BRPI1004134A2 (en) | 2013-02-26 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160819 Address after: Hongkong, China Patentee after: Johnson Controls Hitachi air conditioning technology (Hongkong) Co., Ltd. Address before: Tokyo, Japan Patentee before: Hitachi Appliances Inc. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180718 Address after: Tokyo, Japan, Japan Patentee after: Hitachi Johnson Controls Air Conditioning Co., Ltd. Address before: Hongkong, China Patentee before: Johnson Controls Hitachi air conditioning technology (Hongkong) Co., Ltd. |
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