CN103388881A - Heat pump and air-conditioning system as well as control method thereof - Google Patents

Heat pump and air-conditioning system as well as control method thereof Download PDF

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Publication number
CN103388881A
CN103388881A CN2013102708354A CN201310270835A CN103388881A CN 103388881 A CN103388881 A CN 103388881A CN 2013102708354 A CN2013102708354 A CN 2013102708354A CN 201310270835 A CN201310270835 A CN 201310270835A CN 103388881 A CN103388881 A CN 103388881A
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China
Prior art keywords
heat pump
pump type
type air
heat exchanger
conditioning
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Pending
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CN2013102708354A
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Chinese (zh)
Inventor
张�浩
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Midea Group Co Ltd
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Guangdong Midea Electric Appliances Co Ltd
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Priority to CN2013102708354A priority Critical patent/CN103388881A/en
Publication of CN103388881A publication Critical patent/CN103388881A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention provides a heat pump and air-conditioning system as well as a control method thereof. The heat pump and air-conditioning system comprises a coolant circulation circuit formed by a compressor, a four-way valve, an indoor heat exchanger and an outdoor heat exchanger which are connected through pipelines; a coolant heating device and a first throttle device which can be used for regulating a flow rate are sequentially connected onto the pipeline from the four-way valve and the outdoor heat exchanger in series; a second throttle device which can be used for regulating the flow rate is further connected onto the pipeline between the indoor heat exchanger and the outdoor heat exchanger in series; and the heat pump and air-conditioning system further comprises a controller, and the controller is used for controlling actions of the first throttle device and the second throttle device as well as the opening or the closing of the coolant heat exchanger. According to the heat pump and air-conditioning system as well as the control method thereof, non-reversing defrosting of an air conditioner is realized by controlling the process of coolant heating, continuous heat supply by the indoor heat exchanger can be realized during the process of defrosting, and the comfortableness of a room is guaranteed.

Description

Heat pump type air conditioning system and control method thereof
Technical field
The invention belongs to air conditioner technical field, more particularly, relate to a kind of heat pump type air conditioning system and control method thereof with refrigerant heating function.
Background technology
When the air regulator of heat pump type air conditioning system (hereinafter to be referred as air-conditioning) used under worst cold case, after operation a period of time, outer machine heat exchanger meeting frosting, increased thermal resistance and windage, is unfavorable for heat exchange., for air-conditioning is normally moved, often need the frost of outer machine is removed and melted.
Existing air-conditioned main Defrost mode is the switching cross valve, carries out kind of refrigeration cycle.Although it is clean that such Defrost mode can be removed the frost on heat exchanger, in the process of defrosting, indoor set is out of service, can not give the room continuous heat supply.This just greatly reduces room temperature, has reduced the comfort level in room, has certain drawback.
Existing a kind of Defrost method that adopts hot-gas bypass and refrigerant heating to combine, a kind of conditioner as disclosed in Chinese patent CN200610109150, by having increased by two bypass lines more, heater is placed on wherein on one side on path pipe, heater and outdoor heat exchanger not in same stream, are controlled and are carried out defrost respectively.Although the method also can realize the defrost that do not commutate, and the lasting heat supply of indoor set, structure is loaded down with trivial details, and the flow-control of exhaust bypass is very complicated, and actual operation is not strong.
Summary of the invention
The object of the present invention is to provide a kind of structure and control procedure simple, reliable, as to have the refrigerant heating function heat pump type air conditioning system and control method, be intended to utilize the not reverse cycle defrost of realizing air-conditioning to the control procedure of refrigerant heating, and indoor heat exchanger can continue heat supply in defrosting, guarantees the comfortableness in room.
For achieving the above object, the technical solution used in the present invention is: a kind of heat pump type air conditioning system is provided, comprises by pipeline and connect the refrigerant circulation circuit that compressor, cross valve, indoor heat exchanger and outdoor heat exchanger form;
Described cross valve is to the first throttle device that a refrigerant heater and a capable of regulating flow quantity are arranged in sequential series also on the pipeline of described outdoor heat exchanger;
Also be in series with the second throttling arrangement of a capable of regulating flow quantity on pipeline between described indoor heat exchanger and described outdoor heat exchanger;
Described heat pump type air conditioning system also comprises a controller, is used for controlling described first throttle device and described the second throttling device action and controls and open or close described refrigerant heater.
Alternatively, described refrigerant heater is electrothermal heater or electromagnetic heater.
Alternatively, described first throttle device is a kind of in electric expansion valve, silicon valve, heating power expansion valve.
Alternatively, described the second throttling arrangement is a kind of in electric expansion valve, silicon valve, heating power expansion valve.
Further, also be in series with respectively a two-way stop valve on the front and back pipeline of described indoor heat exchanger.
Further, also be provided with a gas-liquid separator between the air entry of described compressor and described cross valve.
The present invention also provides a kind of control method of above-mentioned heat pump type air conditioning system, described controller is controlled described heat pump type air conditioning system and is carried out refrigerating operaton, and described controller is controlled that described refrigerant heater cuts out, the flow of described first throttle device is transferred to maximum, described the second throttling arrangement is according to the running status adjust flux of air-conditioning system.
The present invention also provides the control method of another kind of above-mentioned heat pump type air conditioning system, described controller is controlled described heat pump type air conditioning system and is carried out refrigerating operaton, and described controller is controlled that described refrigerant heater cuts out, the flow of described first throttle device is transferred to maximum, described the second throttling arrangement is according to the running status adjust flux of air-conditioning system.
Further, described controller is controlled described heat pump type air conditioning system and is continued to carry out heating operation, and described controller is controlled, and described refrigerant heater is opened, described first throttle device is transferred to maximum according to the running status adjust flux of air-conditioning system, the flow of described the second throttling arrangement.
The beneficial effect of heat pump type air conditioning system provided by the invention and control method thereof is: compared with prior art, heat pump type air conditioning system of the present invention is controlled the mutual cooperation operation of first throttle device, the second throttling arrangement and refrigerant heater by controller, realize air-conditioning system refrigeration, heat and the operational mode such as reverse cycle defrost not, not only the frosting of outdoor heat exchanger can be removed, and indoor heat exchanger can continue heat supply in defrosting, guarantee indoor temperature, improve the comfortableness in room.In addition, this air-conditioning system structure and control procedure are simple, reliable, meet the living needs of people's high level.
Description of drawings
The operation schematic diagram of heat pump type air conditioning system when freezing that Fig. 1 provides for the embodiment of the present invention;
The operation schematic diagram of heat pump type air conditioning system when heating that Fig. 2 provides for the embodiment of the present invention;
The heat pump type air conditioning system that Fig. 3 provides for embodiment of the present invention operation schematic diagram of reverse cycle defrost not when heating.
Wherein, Reference numeral:
1 is that compressor, 2 is that cross valve, 3 is that indoor heat exchanger, 4 outdoor heat exchangers, 5 are that refrigerant heater, 61 is that first throttle device, 62 second throttling arrangements, 7 are that two-way shut-off valve, 8 is gas-liquid separator.
The specific embodiment
, in order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
See also Fig. 1, now heat pump type air conditioning system provided by the invention is described.Heat pump type air conditioning system comprises the refrigerant circulation circuit that connects compressor 1, cross valve 2, indoor heat exchanger 3 and outdoor heat exchanger 4 formation by pipeline; Specifically, cross valve 2 has interface 2a, 2b, 2c, 2d, and wherein, interface 2a is connected with the air entry of compressor 1, and interface 2b is connected with indoor heat exchanger 3, and interface 2c is connected with the exhaust outlet of compressor 1, and interface 2d is connected with outdoor heat exchanger 4; At cross valve 2 to the first throttle device 61 that refrigerant heater 5 and capable of regulating flow quantity are arranged in sequential series also on the pipeline of outdoor heat exchanger 4; And also be in series with the second throttling arrangement 62 of capable of regulating flow quantity on the pipeline between indoor heat exchanger 3 and outdoor heat exchanger 4; Heat pump type air conditioning system also comprises the controller (not shown), and this controller is used for controlling first throttle device 61 and the second throttling arrangement 62 actions and controls and open or cut out refrigerant heater 5.
Heat pump type air conditioning system provided by the invention is simple in structure, control the mutual cooperation operation of first throttle device 61, the second throttling arrangement 62 and refrigerant heater 5 by controller being set corresponding control program, just can realize air-conditioning system refrigeration, heat and the operational mode such as reverse cycle defrost not, not only the frosting of outdoor heat exchanger 4 can be removed, and indoor heat exchanger 3 can continue to indoor heating in defrosting, guarantee indoor temperature, improve the comfortableness in room.In addition, this air-conditioning system is reliable, can finely meet the living needs of people's high level.
In the present embodiment, the preferred electrothermal heater of refrigerant heater 5, realize control to the adjusting of its duty (comprise unlatching, close or operate power) and cleanliness without any pollution to facilitate by the control to electric current; Certainly be not limited to electrothermal heater herein, also can adopt other device that can produce heat, as electromagnetic heater, as long as can carry out automatically controlling to its operation by controller.
In the present embodiment, first throttle device 61 and the second throttling arrangement 62 are necessary for throttling arrangement that can adjust flux, specifically can select electric expansion valve, silicon valve or heating power expansion valve, from the consider of control and cost, this sentences and selects electric expansion valve is good; Because electric expansion valve can accurately be controlled the flow of refrigerant; Reaction speed is faster than heating power expansion valve, can in time reach the required open degree of defrosting, improves defrost performance, and evaporating temperature is also more stable; And can control better suction superheat, adapt to larger refrigeration scope.
See also Fig. 1, in the present embodiment, also be in series with respectively a two-way stop valve 7 on the front and back pipeline of indoor heat exchanger 3, can manually control like this keying spool and control passing through and cut-off of refrigerant, for installing and overhaul air-conditioning system, provide convenience.
See also Fig. 1, in the present embodiment, also be provided with gas-liquid separator 8 between the interface 2a of the air entry of compressor 1 and cross valve 2, this gas-liquid separator can prevent that liquid refrigerants from entering in compressor 1, and only allow gaseous coolant enter in compressor 1, prevent that compressor 1 from producing liquid hit phenomenon.
See also Fig. 1, the present invention also provides a kind of control method of refrigerating operaton of above-mentioned heat pump type air conditioning system, specifically, this control method comprises: the above-mentioned control heat pump type air conditioning system of controller carries out refrigerating operaton, and controller is controlled that refrigerant heater 5 cuts out, the flow of first throttle device 61 is transferred to maximum, the second throttling arrangement 62 is according to the running status adjust flux of air-conditioning system.Under the refrigerating operaton state, the flow direction of refrigerant in air-conditioning system is such: the air entry of exhaust outlet → cross valve 2 → refrigerant heater 5 → first throttle device 61 → outdoor heat exchanger 4 → the second throttling arrangement 62 → indoor heat exchanger 3 → compressors 1 of compressor 1.Under this refrigerant circulation pattern, air-conditioning system is sustainable freezes to indoor.
Referring to Fig. 2, when needs air-conditioning system heating operation, its control method is specially: controller is controlled heat pump type air conditioning system and is carried out refrigerating operaton, and controller is controlled that refrigerant heater 5 cuts out, the flow of first throttle device 61 is transferred to maximum, the second throttling arrangement 62 is according to the running status adjust flux of air-conditioning system.At this moment, the flow direction of refrigerant in air-conditioning system is such: the air entry of exhaust outlet → cross valve 2 → indoor heat exchanger 3 → the second throttling arrangement 62 → outdoor heat exchanger 4 → first throttle device 61 → refrigerant heater 5 → compressors 1 of compressor 1.Under this refrigerant circulation pattern, air-conditioning system is sustainable carries out heat supply to indoor.
See also Fig. 3, when in heating process, the outdoor heat exchanger frosting need to defrost, its control method is specially: controller is controlled heat pump type air conditioning system and is continued to carry out heating operation, and controller is controlled, and refrigerant heater 5 is opened, first throttle device 61 is transferred to maximum according to the running status adjust flux of air-conditioning system, the flow of the second throttling arrangement 62.at this moment, the flow direction of refrigerant in air-conditioning system is identical during with the heating operation state: (refrigerant is high temperature to the exhaust outlet of compressor 1, high pressure, gaseous state) → cross valve 2 → indoor heat exchanger 3(refrigerant is middle temperature, high pressure, the gas-liquid mixed state, for indoor heating) → the second throttling arrangement 62(peak flow values, do not produce restriction effect, therefore temperature from the second throttling arrangement 62 refrigerant out is still, high pressure, the gas-liquid mixed state) temperature in → outdoor heat exchanger 4(, high pressure, gas-liquid mixed state refrigerant is outdoor heat exchanger defrosting) → first throttle device 61(is according to the running state of air conditioner adjust flux, become low temperature from first throttle device 61 refrigerant out after throttling, low pressure, liquid state) → refrigerant heater 5(refrigerant becomes low temperature after the heater heating, low pressure, the air entry of gaseous state) → compressor 1.Under this refrigerant circulation pattern, the sustainable defrosting that realizes to indoor heating the time outdoor heat exchanger of air-conditioning system.
That is to say, heat pump type air conditioning system control method of the present invention can be by controlling the mutual cooperation operation of first throttle device 61, the second throttling arrangement 62 and refrigerant heater 5 in heat pump type air conditioning system of the present invention, realize air-conditioning system refrigeration, heat and the operational mode such as reverse cycle defrost not, not only the frosting of outdoor heat exchanger 4 can be removed, and indoor heat exchanger 3 can continue to indoor transfer heat in defrosting, thereby realize guaranteeing indoor temperature, improve the comfortableness in room.In addition, this Air-condition system control process is simple, reliable, can meet the living needs of people's high level.
The foregoing is only preferred embodiment of the present invention,, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims (9)

1. heat pump type air conditioning system, comprise by pipeline and connect the refrigerant circulation circuit that compressor, cross valve, indoor heat exchanger and outdoor heat exchanger form; It is characterized in that:
Described cross valve is to the first throttle device that a refrigerant heater and a capable of regulating flow quantity are arranged in sequential series also on the pipeline of described outdoor heat exchanger;
Also be in series with the second throttling arrangement of a capable of regulating flow quantity on pipeline between described indoor heat exchanger and described outdoor heat exchanger;
Described heat pump type air conditioning system also comprises a controller, is used for controlling described first throttle device and described the second throttling device action and controls and open or close described refrigerant heater.
2. heat pump type air conditioning system as claimed in claim 1, it is characterized in that: described refrigerant heater is electrothermal heater or electromagnetic heater.
3. heat pump type air conditioning system as claimed in claim 1 is characterized in that: described first throttle device is a kind of in electric expansion valve, silicon valve, heating power expansion valve.
4. heat pump type air conditioning system as claimed in claim 1 is characterized in that: described the second throttling arrangement is a kind of in electric expansion valve, silicon valve, heating power expansion valve.
5. heat pump type air conditioning system as claimed in claim 1, is characterized in that: also be in series with respectively a two-way stop valve on the front and back pipeline of described indoor heat exchanger.
6. heat pump type air conditioning system as claimed in claim 1, is characterized in that: also be provided with a gas-liquid separator between the air entry of described compressor and described cross valve.
7. as the control method of the described heat pump type air conditioning system of claim 1 to 6 any one, it is characterized in that: described controller is controlled described heat pump type air conditioning system and is carried out refrigerating operaton, and described controller is controlled that described refrigerant heater cuts out, the flow of described first throttle device is transferred to maximum, described the second throttling arrangement is according to the running status adjust flux of air-conditioning system.
8. as the control method of the described heat pump type air conditioning system of claim 1 to 6 any one, it is characterized in that: described controller is controlled described heat pump type air conditioning system and is carried out heating operation, and described controller is controlled that described refrigerant heater cuts out, the flow of described first throttle device is transferred to maximum, described the second throttling arrangement is according to the running status adjust flux of air-conditioning system.
9. the control method of heat pump type air conditioning system as claimed in claim 8, it is characterized in that: described controller is controlled described heat pump type air conditioning system and is continued to carry out heating operation, and described controller is controlled, and described refrigerant heater is opened, described first throttle device is transferred to maximum according to the running status adjust flux of air-conditioning system, the flow of described the second throttling arrangement.
CN2013102708354A 2013-06-28 2013-06-28 Heat pump and air-conditioning system as well as control method thereof Pending CN103388881A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104197580A (en) * 2014-02-17 2014-12-10 刘雄 Air conditioner refrigeration device
CN106196524A (en) * 2016-08-01 2016-12-07 珠海格力电器股份有限公司 Control device, control method and the air-conditioning of a kind of air-conditioning anti-freeze
CN106247533A (en) * 2016-08-08 2016-12-21 珠海格力电器股份有限公司 Control device, control method and the air conditioning system of a kind of air conditioning system defrost
CN106871511A (en) * 2015-12-10 2017-06-20 暵旸绿能科技股份有限公司 Heat pump
WO2020000928A1 (en) * 2018-06-26 2020-01-02 珠海格力电器股份有限公司 Inverter air conditioner, and control method and device therefor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102062492A (en) * 2009-11-13 2011-05-18 Lg电子株式会社 Air conditioner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102062492A (en) * 2009-11-13 2011-05-18 Lg电子株式会社 Air conditioner

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104197580A (en) * 2014-02-17 2014-12-10 刘雄 Air conditioner refrigeration device
CN106871511A (en) * 2015-12-10 2017-06-20 暵旸绿能科技股份有限公司 Heat pump
CN106196524A (en) * 2016-08-01 2016-12-07 珠海格力电器股份有限公司 Control device, control method and the air-conditioning of a kind of air-conditioning anti-freeze
CN106196524B (en) * 2016-08-01 2019-04-02 珠海格力电器股份有限公司 A kind of control device, control method and the air-conditioning of air-conditioning anti-freeze
CN106247533A (en) * 2016-08-08 2016-12-21 珠海格力电器股份有限公司 Control device, control method and the air conditioning system of a kind of air conditioning system defrost
WO2020000928A1 (en) * 2018-06-26 2020-01-02 珠海格力电器股份有限公司 Inverter air conditioner, and control method and device therefor

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Owner name: MIDEA GROUP CO., LTD.

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Effective date: 20131129

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Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28

Applicant after: Midea Group Co., Ltd.

Address before: 528311 Beijiao, Foshan, Shunde District, the town of Guangdong, the United States Avenue, No. 6

Applicant before: Meidi Electric Appliances Co., Ltd., Guangdong

RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20131113