CN215113324U - Heat pump system and air conditioning equipment - Google Patents

Heat pump system and air conditioning equipment Download PDF

Info

Publication number
CN215113324U
CN215113324U CN202023124634.8U CN202023124634U CN215113324U CN 215113324 U CN215113324 U CN 215113324U CN 202023124634 U CN202023124634 U CN 202023124634U CN 215113324 U CN215113324 U CN 215113324U
Authority
CN
China
Prior art keywords
heat exchanger
port
indoor
outdoor heat
outdoor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202023124634.8U
Other languages
Chinese (zh)
Inventor
尤文超
杨智峰
戴永福
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202023124634.8U priority Critical patent/CN215113324U/en
Application granted granted Critical
Publication of CN215113324U publication Critical patent/CN215113324U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The utility model relates to a heat pump system and air conditioning equipment, wherein heat pump system includes compressor (1), first indoor heat exchanger (22), second indoor heat exchanger (23), outdoor heat exchanger (30) and valve member (40), valve member (40) are connected with the gas vent and the induction port of compressor (1), first indoor heat exchanger (22), second indoor heat exchanger (23) and outdoor heat exchanger (30), valve member (40) are configured to the flow direction of control refrigerant and/or the break-make of connecting line to realize the switching of heat pump system between different mode; wherein the working modes comprise a cooling mode, a heating mode and a dehumidification and reheat mode, and in the dehumidification and reheat mode, the valve assembly (40) is configured to communicate the exhaust port of the compressor (1) with the first interface of the first indoor heat exchanger (22) so that the first indoor heat exchanger (22) can be used as a condenser.

Description

Heat pump system and air conditioning equipment
Technical Field
The utility model relates to an air conditioning equipment technical field especially relates to a heat pump system and air conditioning equipment.
Background
At present, in order to improve the comfort level of the environment where people are located, a constant temperature and humidity machine is adopted to control the temperature and the humidity in the environment. Most constant temperature and humidity machines need to be provided with an electric heating device, for example, when the indoor humidity is higher than the set humidity and the indoor temperature is lower than or equal to the set temperature, the electric heating device needs to be used for increasing the indoor temperature in order to avoid the indoor temperature being too low; for another example, when the indoor temperature is lower than the set temperature, the indoor temperature needs to be raised, but if the outdoor heat exchanger frosts, a part of high-temperature and high-pressure refrigerant in the heat pump system needs to be used for defrosting, which reduces the heat exchange capability of the heat exchanger in the heat pump system, thereby reducing the heating capability and causing the indoor temperature to fluctuate, and at this time, the electric heating device also needs to be used for adjusting the indoor temperature.
Although the use of the electric heating device can meet the requirement of adjusting the indoor temperature, the electric heating device can increase the power consumption and reduce the energy efficiency.
It is noted that the information disclosed in this background section of the invention is only for enhancement of understanding of the general background of the invention, and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a heat pump system and air conditioning equipment improve heat pump system's heat transfer performance.
According to a first aspect of the present invention, there is provided a heat pump system, comprising:
a compressor;
a first indoor heat exchanger;
a second indoor heat exchanger;
an outdoor heat exchanger; and
the valve assembly is connected with an exhaust port and a suction port of the compressor, the first indoor heat exchanger, the second indoor heat exchanger and the outdoor heat exchanger and is configured to control the flow direction of a refrigerant and/or the on-off of a connecting pipeline so as to realize the switching of the heat pump system among different working modes;
the working modes comprise a cooling mode, a heating mode and a dehumidification and reheating mode, and in the dehumidification and reheating mode, the valve assembly is configured to communicate the exhaust port of the compressor with the first interface of the first indoor heat exchanger, so that the first indoor heat exchanger can be used as a condenser.
In some embodiments, the outdoor heat exchanger includes a first outdoor heat exchanger and a second outdoor heat exchanger, and the valve assembly is further configured to operate at least one of the first outdoor heat exchanger and the second outdoor heat exchanger as a condenser or neither of the first outdoor heat exchanger and the second outdoor heat exchanger in the dehumidification and reheat mode.
In some embodiments, the dehumidification-reheat mode includes a first dehumidification-reheat mode in which the first outdoor heat exchanger and the second outdoor heat exchanger both function as a condenser, a second dehumidification-reheat mode, a third dehumidification-reheat mode, and a fourth dehumidification-reheat mode; in the second dehumidification and reheating mode, the first outdoor heat exchanger is used as a condenser, and the second outdoor heat exchanger is in a closed state or used as an evaporator; in the third dehumidification and reheating mode, the second outdoor heat exchanger is used as a condenser, and the first outdoor heat exchanger is in a closed state or used as an evaporator; in the fourth dehumidification and reheating mode, the first outdoor heat exchanger and the second outdoor heat exchanger do not work; the valve assembly is configured to switch the heat pump system among a first dehumidification and reheating mode, a second dehumidification and reheating mode, a third dehumidification and reheating mode and a fourth dehumidification and reheating mode.
In some embodiments, the outdoor heat exchanger includes a first outdoor heat exchanger and a second outdoor heat exchanger, the operating mode includes a defrost mode in which the valve assembly is configured such that one of the first outdoor heat exchanger and the second outdoor heat exchanger functions as a condenser and the other of the first outdoor heat exchanger and the second outdoor heat exchanger functions as an evaporator.
In some embodiments, the defrosting mode includes a first defrosting mode in which the first outdoor heat exchanger functions as a condenser and the second outdoor heat exchanger functions as an evaporator; in the second defrosting mode, the first outdoor heat exchanger is used as an evaporator, and the second outdoor heat exchanger is used as a condenser; the valve assembly is configured to enable the heat pump system to switch between a first defrosting mode and a second defrosting mode.
In some embodiments, the heat pump system further comprises a first outdoor fan and a second outdoor fan, the first outdoor fan and the first outdoor heat exchanger are located in the first air duct, the second outdoor fan and the second outdoor heat exchanger are located in the second air duct, and the first air duct and the second air duct are independently arranged.
In some embodiments, the heat pump system further comprises an indoor fan, the first indoor heat exchanger and the second indoor heat exchanger are located in the same air duct, and indoor return air generated by the indoor fan sequentially passes through the second indoor heat exchanger and the first indoor heat exchanger.
In some embodiments, the outdoor heat exchanger includes a first outdoor heat exchanger and a second outdoor heat exchanger, the valve assembly includes a first four-way valve and a second four-way valve, a first port of the first four-way valve is communicated with an exhaust port of the compressor, a second port of the first four-way valve is communicated with a first interface of the first outdoor heat exchanger, a third port and a fourth port of the first four-way valve are both communicated with an air suction port of the compressor, a first port of the second four-way valve is communicated with an exhaust port of the compressor, a second port of the second four-way valve is communicated with a first interface of the second outdoor heat exchanger, and a third port and a fourth port of the second four-way valve are both communicated with an air suction port of the compressor.
In some embodiments, the valve assembly further comprises a first throttling element connected between the fourth port of the first four-way valve and the suction inlet of the compressor.
In some embodiments, the valve assembly further comprises a second throttling element connected between the fourth port of the second four-way valve and the suction inlet of the compressor.
In some embodiments, the valve assembly further comprises a control valve disposed on a connection line between the discharge port of the compressor and the first port of the first indoor heat exchanger.
In some embodiments, the heat pump system further includes an outdoor unit including a compressor, an outdoor heat exchanger including a first outdoor heat exchanger and a second outdoor heat exchanger, a valve assembly, a first expansion valve and a second expansion valve, the first expansion valve being connected between the second port of the first outdoor heat exchanger and the first port of the outdoor unit, the second expansion valve being connected between the second port of the second outdoor heat exchanger and the first port of the outdoor unit.
In some embodiments, the heat pump system further includes an indoor unit, the indoor unit includes a first indoor heat exchanger, a second indoor heat exchanger, a third expansion valve and a fourth expansion valve, the third expansion valve is connected between the second port of the first indoor heat exchanger and the first port of the indoor unit, the fourth expansion valve is connected between the first port of the second indoor heat exchanger and the first port of the indoor unit, and the first port of the indoor unit is communicated with the first port of the outdoor unit.
According to a second aspect of the present invention, there is provided an air conditioning apparatus comprising the heat pump system described above.
Based on the technical scheme, the embodiment of the utility model provides a flow direction and/or connecting line's break-make through valve member control refrigerant, can realize heat pump system at the refrigeration mode, heat the mode and dehumidify the switching between the reheat mode, and under the dehumidification mode of heating, the gas vent that can make the compressor through the valve member communicates with first interface of first indoor heat exchanger, first indoor heat exchanger is as the condenser promptly, thereby heat the indoor environment through first indoor heat exchanger, avoid causing the indoor temperature to reduce too much because the dehumidification, improve heat pump system's heat transfer performance, can also reduce the electric heater unit of use, reduce power consumption, improve the efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of the heat pump system of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the heat pump system according to the present invention in the cooling mode.
Fig. 3 is a schematic structural diagram of an embodiment of the heat pump system in the first dehumidification and reheating mode.
Fig. 4 is a schematic structural diagram of an embodiment of the heat pump system in the second dehumidification and reheating mode.
Fig. 5 is a schematic structural diagram of an embodiment of the heat pump system in the third dehumidification and reheating mode.
Fig. 6 is a schematic structural diagram of an embodiment of the heat pump system in the fourth dehumidification and reheating mode.
Fig. 7 is a schematic structural diagram of an embodiment of the heat pump system according to the present invention in the heating mode.
Fig. 8 is a schematic structural diagram of an embodiment of the heat pump system in the first defrosting mode.
Fig. 9 is a schematic structural diagram of an embodiment of the heat pump system in the second defrosting mode.
In the figure:
100. an outdoor unit; 200. an indoor unit;
1. a compressor; 2. a first four-way valve; 3. a second four-way valve; 4. a control valve; 5. a first outdoor heat exchanger; 6. a second outdoor heat exchanger; 7. a first outdoor fan; 8. a second outdoor fan; 9. a first throttling element; 10. a second throttling element; 11. a first expansion valve; 12. a second expansion valve; 13. a liquid storage tank; 14. a first shut-off valve; 15. a second stop valve; 16. a third stop valve; 17. a fourth stop valve; 18. a fifth stop valve; 19. a sixth stop valve; 20. a third expansion valve; 21. a fourth expansion valve; 22. a first indoor heat exchanger; 23. a second indoor heat exchanger; 24. an indoor fan; 25. a first connecting member; 26. a second connecting member; 27. a third connecting member; 28. a fourth connecting member; 30. an outdoor heat exchanger; 40. a valve assembly.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the invention.
Referring to fig. 1, in some embodiments of the heat pump system provided by the present invention, the heat pump system includes a compressor 1, a first indoor heat exchanger 22, a second indoor heat exchanger 23, an outdoor heat exchanger 30 and a valve assembly 40, the valve assembly 40 is connected to an exhaust port and an intake port of the compressor 1, the first indoor heat exchanger 22, the second indoor heat exchanger 23 and the outdoor heat exchanger 30, and the valve assembly 40 is configured to control a flow direction of a refrigerant and/or on/off of a connection pipeline, so as to switch the heat pump system between different operation modes. Wherein the operation modes include a cooling mode, a heating mode, and a dehumidification and reheat mode, in the dehumidification and reheat mode, the valve assembly 40 is configured to communicate the discharge port of the compressor 1 with the first port of the first indoor heat exchanger 22, so that the first indoor heat exchanger 22 functions as a condenser.
In the above embodiment, the valve assembly 40 controls the flow direction of the refrigerant and/or the on-off of the connecting pipeline, so that the heat pump system can be switched between the cooling mode, the heating mode and the dehumidification and reheating mode, and different requirements of users in different seasons are met. Moreover, in the dehumidification and heating mode, the exhaust port of the compressor 1 can be communicated with the first interface of the first indoor heat exchanger 22 through the valve assembly 40, that is, the first indoor heat exchanger 22 is used as a condenser, so that the indoor environment is heated through the first indoor heat exchanger 22, the excessive reduction of the indoor temperature caused by dehumidification is avoided, the heat exchange performance of the heat pump system is improved, the use of an electric heating device can be reduced, the power consumption is reduced, and the energy efficiency is improved.
In the above embodiment, when the first indoor heat exchanger 22 is used as a condenser, the first port of the first indoor heat exchanger 22 is directly communicated with the exhaust port of the compressor 1, so that a part of the exhaust gas of the compressor 1 can be directly introduced into the room to reheat the indoor environment, and the reheating efficiency is high.
In some embodiments, the outdoor heat exchanger 30 includes a first outdoor heat exchanger 5 and a second outdoor heat exchanger 6, and the valve assembly 40 is further configured to operate at least one of the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6 as a condenser or to operate neither the first outdoor heat exchanger 5 nor the second outdoor heat exchanger 6 in the dehumidification and reheat mode.
In some embodiments, by controlling the valve assembly 40, in the dehumidification and reheating mode, the two heat exchangers disposed outdoors can be simultaneously operated and used as condensers, and at this time, the operating frequency of the compressor 1 is high, and the lubricating oil in the compressor 1 can smoothly flow along with the refrigerant; one of the two heat exchangers arranged outdoors can be in a working state and used as a condenser, and the other heat exchanger is in a closed state or in a working state and used as an evaporator; the two heat exchangers arranged outdoors can also be out of operation, i.e. in a non-operating state.
When both of the two heat exchangers installed outdoors are used as condensers, the first indoor heat exchanger 22 serving as a condenser has a small amount of distributable refrigerant, and has a low temperature raising capability. In the embodiment in which one of the two heat exchangers disposed outdoors is operated and functions as a condenser and the other is operated and functions as an evaporator, the first indoor heat exchanger 22, which functions as a condenser, has an increased distributable refrigerant amount and an improved temperature raising capability; also, since the first indoor heat exchanger 22 disposed indoors functions as a condenser and the second indoor heat exchanger 23 functions as an evaporator in the dehumidification reheating mode, the indoor and outdoor heat exchangers can achieve better division as a whole, and after increasing the frequency of the compressor 1 in order to increase the reheating capacity of the indoor first indoor heat exchanger 22, the indoor environment can be adjusted to an appropriate temperature and humidity by dynamic division between the second indoor heat exchanger 23 and the outdoor heat exchanger functioning as an evaporator. When the two heat exchangers disposed outdoors do not work, the distributable refrigerant quantity of the first indoor heat exchanger 22 serving as a condenser reaches the maximum, and the temperature rise capability is the maximum.
In some embodiments, the dehumidification-reheat mode includes a first dehumidification-reheat mode in which the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6 both function as condensers, a second dehumidification-reheat mode, a third dehumidification-reheat mode, and a fourth dehumidification-reheat mode; in the second dehumidification-reheat mode, the first outdoor heat exchanger 5 functions as a condenser, and the second outdoor heat exchanger 6 is in an off state or functions as an evaporator; in the third dehumidification-reheat mode, the second outdoor heat exchanger 6 functions as a condenser, and the first outdoor heat exchanger 5 is in an off state or functions as an evaporator; in the fourth dehumidification and reheating mode, the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6 do not work; the valve assembly 40 is configured to switch the heat pump system among a first dehumidification and reheat mode, a second dehumidification and reheat mode, a third dehumidification and reheat mode, and a fourth dehumidification and reheat mode.
As shown in fig. 3, in the first dehumidification and reheating mode, the first outdoor heat exchanger 5, the second outdoor heat exchanger 6 and the first indoor heat exchanger 22 all function as condensers, the second indoor heat exchanger 23 functions as an evaporator, the indoor environment is cooled and dehumidified by the second indoor heat exchanger 23, and the indoor environment can be reheated by the first indoor heat exchanger 22, so that the temperature of the indoor environment is prevented from being too low to meet the dehumidification requirement.
As shown in fig. 4, in the second dehumidification and reheating mode, the first outdoor heat exchanger 5 is in a closed state, the second outdoor heat exchanger 6 and the first indoor heat exchanger 22 both function as condensers, the second indoor heat exchanger 23 functions as an evaporator, the indoor environment is cooled and dehumidified by the second indoor heat exchanger 23, and the indoor environment can be reheated by the first indoor heat exchanger 22, so that the temperature of the indoor environment is prevented from being too low to meet the dehumidification requirement.
In other embodiments, in the second dehumidification and reheating mode, the first outdoor heat exchanger 5 may also be in an operating state and used as an evaporator, the second outdoor heat exchanger 6 and the first indoor heat exchanger 22 are both used as condensers, the second indoor heat exchanger 23 is used as an evaporator, the indoor environment is cooled and dehumidified by the second indoor heat exchanger 23, and the indoor environment can be reheated by the first indoor heat exchanger 22 to prevent the temperature of the indoor environment from being too low to meet the dehumidification requirement. Meanwhile, when the indoor humidity reaches a preset requirement and the indoor temperature is still low and cannot meet the preset requirement, the first outdoor heat exchanger 5 is also used as an evaporator, the reheating capacity of the first indoor heat exchanger 22 can be improved by improving the frequency of the compressor 1, and meanwhile, the refrigerant in the second indoor heat exchanger 23 can be distributed to the first outdoor heat exchanger 5, so that excessive dehumidification of the indoor environment caused by the improvement of the frequency of the compressor 1 is avoided, and the refrigerating and heating capacities of the heat pump system are dynamically balanced.
As shown in fig. 5, in the third dehumidification and reheating mode, the second outdoor heat exchanger 6 is in a closed state, the first outdoor heat exchanger 5 and the first indoor heat exchanger 22 both function as condensers, the second indoor heat exchanger 23 functions as an evaporator, the indoor environment is cooled and dehumidified by the second indoor heat exchanger 23, and the indoor environment can be reheated by the first indoor heat exchanger 22, so that the temperature of the indoor environment is prevented from being too low to meet the dehumidification requirement.
In other embodiments, in the third dehumidification and reheating mode, the second outdoor heat exchanger 6 may also be in an operating state and used as an evaporator, the first outdoor heat exchanger 5 and the first indoor heat exchanger 22 are both used as condensers, the second indoor heat exchanger 23 is used as an evaporator, the indoor environment is cooled and dehumidified by the second indoor heat exchanger 23, and the indoor environment can be reheated by the first indoor heat exchanger 22 to prevent the temperature of the indoor environment from being too low to meet the dehumidification requirement. Meanwhile, by using the second outdoor heat exchanger 6 as an evaporator, when the indoor humidity reaches a preset requirement and the indoor temperature is still low and cannot meet the preset requirement, the reheating capacity of the first indoor heat exchanger 22 can be improved by increasing the frequency of the compressor 1, and meanwhile, the refrigerant in the second indoor heat exchanger 23 can be shunted to the second outdoor heat exchanger 6, so that excessive dehumidification of the indoor environment caused by the increase of the frequency of the compressor 1 is avoided, and the refrigerating and heating capacities of the heat pump system are dynamically balanced.
As shown in fig. 6, in the fourth dehumidification and reheating mode, the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6 are in a closed state, the first indoor heat exchanger 22 functions as a condenser, the second indoor heat exchanger 23 functions as an evaporator, the indoor environment is cooled and dehumidified by the second indoor heat exchanger 23, and the indoor environment is reheated by the first indoor heat exchanger 22, so that the temperature of the indoor environment is prevented from being too low to meet the dehumidification requirement.
In some embodiments, the outdoor heat exchanger 30 includes a first outdoor heat exchanger 5 and a second outdoor heat exchanger 6, and the operating mode includes a defrost mode in which the valve assembly 40 is configured such that one of the first and second outdoor heat exchangers 5, 6 functions as a condenser and the other of the first and second outdoor heat exchangers 5, 6 functions as an evaporator.
When the indoor and outdoor environment temperature is low and a heat pump system is needed for heating, the outdoor heat exchanger can rapidly convey absorbed heat to the indoor environment, so that the frosting phenomenon easily occurs on the outer surface of the outdoor heat exchanger. In some of the above embodiments, one of the first and second outdoor heat exchangers 5 and 6 may be operated as a condenser by controlling the valve assembly 40 to heat-exchange and melt frost condensed on an outer surface of the other of the first and second outdoor heat exchangers 5 and 6 by heat released from the condenser.
In some embodiments, by controlling the valve assembly 40, the switching between the cooling mode, the heating mode, the dehumidification reheating mode and the defrosting mode can be realized, so that the heat pump system can adapt to more working conditions and meet more requirements.
In some embodiments, the defrosting mode includes a first defrosting mode in which the first outdoor heat exchanger 5 functions as a condenser and the second outdoor heat exchanger 6 functions as an evaporator; in the second defrosting mode, the first outdoor heat exchanger 5 functions as an evaporator, and the second outdoor heat exchanger 6 functions as a condenser; the valve assembly 40 is configured to enable the heat pump system to be switched between a first defrost mode and a second defrost mode.
By alternately carrying out the two defrosting modes, the defrosting operation can be respectively carried out on the two outdoor heat exchangers. The heat pump system uses the double-chamber outer side heat exchanger, adopts the first defrosting mode and the second defrosting mode to realize asynchronous defrosting, and the indoor side heat exchanger still keeps a high-pressure state during defrosting, keeps the heat output of the indoor side, and reduces the fluctuation of the indoor temperature caused by the fact that the indoor side heat exchanger does not heat during defrosting of the common heat pump air conditioner.
In some embodiments, the heat pump system further includes a first outdoor fan 7 and a second outdoor fan 8, the first outdoor fan 7 and the first outdoor heat exchanger 5 are located in the first air duct, the second outdoor fan 8 and the second outdoor heat exchanger 6 are located in the second air duct, and the first air duct and the second air duct are independently disposed.
In some embodiments, the heat pump system further includes an indoor fan 24, the first indoor heat exchanger 22, and the second indoor heat exchanger 23 are located in the same duct, and indoor return air generated by the indoor fan 24 passes through the second indoor heat exchanger 23 and the first indoor heat exchanger 22 in sequence.
The second indoor heat exchanger 23 is disposed upstream of the first indoor heat exchanger 22 so that the indoor-side return air can pass through the first indoor heat exchanger 22 before passing through the second indoor heat exchanger 23 by the action of the indoor fan 24. The advantage of this arrangement is that when the heat pump system is in the dehumidification and reheat mode, the first indoor heat exchanger 22 serves as a condenser, and the second indoor heat exchanger 23 serves as an evaporator, so that the heat released by the condenser can be prevented from being directly absorbed by the evaporator, which is beneficial to improving the energy efficiency of the indoor heat exchanger.
In some embodiments, the outdoor heat exchanger 30 includes a first outdoor heat exchanger 5 and a second outdoor heat exchanger 6, the valve assembly 40 includes a first four-way valve 2 and a second four-way valve 3, a first port of the first four-way valve 2 communicates with the discharge port of the compressor 1, a second port of the first four-way valve 2 communicates with the first interface of the first outdoor heat exchanger 5, a third port and a fourth port of the first four-way valve 2 both communicate with the suction port of the compressor 1, a first port of the second four-way valve 3 communicates with the discharge port of the compressor 1, a second port of the second four-way valve 3 communicates with the first interface of the second outdoor heat exchanger 6, and a third port and a fourth port of the second four-way valve 3 both communicate with the suction port of the compressor 1.
The first port D1 of the first four-way valve 2 is disposed between the second port C1 and the fourth port E1 of the first four-way valve 2, and the second port C1 of the first four-way valve 2 is disposed between the first port D1 and the third port S1 of the first four-way valve 2.
When the first four-way valve 2 is powered on, the first port D1 is communicated with the fourth port E1, and the second port C1 is communicated with the third port S1; when the first four-way valve 2 is powered off, the first port D1 is communicated with the second port C1, and the third port S1 is communicated with the fourth port E1.
The first port D2 of the second four-way valve 3 is disposed between the second port C2 and the fourth port E2 of the second four-way valve 3, and the second port C2 of the second four-way valve 3 is disposed between the first port D2 and the third port S2 of the second four-way valve 3.
When the second four-way valve 3 is powered on, the first port D2 is communicated with the fourth port E2, and the second port C2 is communicated with the third port S2; when the second four-way valve 3 is powered off, the first port D2 is communicated with the second port C2, and the third port S2 is communicated with the fourth port E2.
In some embodiments, the valve assembly 40 further comprises a first throttling element 9, the first throttling element 9 being connected between the fourth port E1 of the first four-way valve 2 and the suction of the compressor 1.
By providing the first throttling element 9 between the fourth port E1 of the first four-way valve 2 and the suction port of the compressor 1, the liquid refrigerant on the connecting line between the discharge port of the compressor 1 and the first four-way valve 2 and the internal connecting line of the first four-way valve 2 can be discharged in time after the first four-way valve 2 is reversed, thereby avoiding the liquid impact problem.
In some embodiments, the valve assembly 40 further comprises a second throttling element 10, the second throttling element 10 being connected between the fourth port E2 of the second four-way valve 3 and the suction inlet of the compressor 1.
By providing the second throttling element 10 between the fourth port E2 of the second four-way valve 3 and the suction port of the compressor 1, the liquid refrigerant on the connecting pipeline between the exhaust port of the compressor 1 and the second four-way valve 3 and the internal connecting pipeline of the second four-way valve 3 can be discharged in time after the second four-way valve 3 is reversed, thereby avoiding the liquid impact problem.
In some embodiments, the first and second throttling elements 9, 10 may be capillary tubes.
In some embodiments, the valve assembly 40 further includes a control valve 4, and the control valve 4 is disposed on a connection line between the discharge port of the compressor 1 and the first port of the first indoor heat exchanger 22. The control valve 4 may be a switching valve for connecting or disconnecting a connection line between the discharge port of the compressor 1 and the first port of the first indoor heat exchanger 22.
In some embodiments, the heat pump system further includes an outdoor unit 100, the outdoor unit 100 includes a compressor 1, an outdoor heat exchanger 30, a valve assembly 40, a first expansion valve 11, and a second expansion valve 12, the outdoor heat exchanger 30 includes a first outdoor heat exchanger 5 and a second outdoor heat exchanger 6, the first expansion valve 11 is connected between a second port of the first outdoor heat exchanger 5 and a first port of the outdoor unit 100, and the second expansion valve 12 is connected between a second port of the second outdoor heat exchanger 6 and a first port of the outdoor unit 100.
In some embodiments, the heat pump system further includes an indoor unit 200, the indoor unit 200 includes a first indoor heat exchanger 22, a second indoor heat exchanger 23, a third expansion valve 20, and a fourth expansion valve 21, the third expansion valve 20 is connected between the second port of the first indoor heat exchanger 22 and the first port of the indoor unit 200, the fourth expansion valve 21 is connected between the first port of the second indoor heat exchanger 23 and the first port of the indoor unit 200, and the first port of the indoor unit 200 is communicated with the first port of the outdoor unit 100.
The working process of an embodiment of the heat pump system of the present invention is described below based on the accompanying drawings 1 to 9:
as shown in fig. 1, the heat pump system includes an outdoor unit 100 and an indoor unit 200. The outdoor unit 100 includes a compressor 1, an outdoor heat exchanger 30, and a valve assembly 40, and the indoor unit 200 includes a first indoor heat exchanger 22 and a second indoor heat exchanger 23.
As shown in fig. 2 to 9, the outdoor heat exchanger 30 includes a first outdoor heat exchanger 5 and a second outdoor heat exchanger 6. The valve assembly 40 includes a first four-way valve 2, a second four-way valve 3, and a control valve 4.
The heat pump system further includes a first outdoor fan 7, a second outdoor fan 8, a first throttling element 9, a second throttling element 10, a first expansion valve 11, a second expansion valve 12, a tank 13, a first shutoff valve 14, a second shutoff valve 15, a third shutoff valve 16, a fourth shutoff valve 17, a fifth shutoff valve 18, a sixth shutoff valve 19, a third expansion valve 20, a fourth expansion valve 21, an indoor fan 24, a first connecting member 25, a second connecting member 26, a third connecting member 27, and a fourth connecting member 28.
The first connector 25, the second connector 26, the third connector 27 and the fourth connector 28 are all Y-shaped tees. The control valve 4 can adopt a bidirectional ball valve, and the connecting pipeline where the control valve 4 is located can bear pressure and flow bidirectionally.
The first port of the first connecting piece 25 is communicated with the exhaust port of the compressor 1, the second port of the first connecting piece 25 is communicated with the first port of the second connecting piece 26, and the third port of the first connecting piece 25 is communicated with the first port of the control valve 4. The second connection port of the second connection member 26 communicates with the first port D1 of the first four-way valve 2, and the third connection port of the second connection member 25 communicates with the first port D2 of the second four-way valve 3.
The second port C1 of the first four-way valve 2 is communicated with the first port of the first outdoor heat exchanger 5, the third port S1 of the first four-way valve 2 is communicated with the third port of the third connecting member 27, the second port of the third connecting member 27 is communicated with the third port S2 of the second four-way valve 3, and the first port of the third connecting member 27 is communicated with the second port of the fourth connecting member 28. The fourth port E1 of the first four-way valve 2 communicates with a first end of the first throttling element 9, and a second end of the first throttling element 9 is connected to a connection line between the first port of the fourth connection 27 and the second port of the fourth connection 28.
The second port C2 of the second four-way valve 3 is communicated with the first port of the second outdoor heat exchanger 6, the third port S2 of the second four-way valve 3 is communicated with the second port of the third connection member 27, the fourth port E2 of the second four-way valve 3 is communicated with the first end of the second throttling element 10, and the second end of the second throttling element 10 is connected to the connection pipe between the first port of the fourth connection member 27 and the second port of the fourth connection member 28. The second connection of the control valve 4 communicates with a second shut-off valve 15. The third port of the fourth connection 28 communicates with the third shut-off valve 16.
The first outdoor fan 7 and the first outdoor heat exchanger 5 are positioned in the first air duct, the second outdoor fan 8 and the second outdoor heat exchanger 6 are positioned in the second air duct, and the first air duct and the second air duct are independently arranged.
A first end of the first expansion valve 11 is communicated with the second port of the first outdoor heat exchanger 5, and a second end of the first expansion valve 11 is communicated with the liquid storage tank 13. A first end of the second expansion valve 12 is communicated with the second port of the second outdoor heat exchanger 6, and a second end of the second expansion valve 12 is communicated with the liquid storage tank 13.
A first stop valve 14 is disposed between the liquid storage tank 13 and the first port of the outdoor unit 100, the first port of the indoor unit 200 is communicated with the first port of the outdoor unit 100, and a fourth stop valve 17 is disposed between the first port of the indoor unit 200 and the second indoor heat exchanger 23.
The second cut-off valve 15 is disposed between the second port of the control valve 4 and the second port of the outdoor unit 100, the second port of the outdoor unit 100 is communicated with the second port of the indoor unit 200, and the fifth cut-off valve 18 is disposed between the second port of the indoor unit 200 and the first port of the first indoor heat exchanger 22.
The third stop valve 16 is disposed between the third port of the fourth connection member 28 and the third port of the outdoor unit 100, the third port of the outdoor unit 100 is communicated with the third port of the indoor unit 200, and the sixth stop valve 19 is disposed between the third port of the indoor unit 200 and the second port of the second indoor heat exchanger 23.
A first end of the third expansion valve 20 communicates with the fourth cut-off valve 17 located in the indoor unit 200, and a second end of the third expansion valve 20 communicates with the second port of the first indoor heat exchanger 22. A first end of the fourth expansion valve 21 communicates with the fourth stop valve 17 located in the indoor unit 200, and a second end of the fourth expansion valve 21 communicates with the first port of the second indoor heat exchanger 23.
The indoor fan 24, the first indoor heat exchanger 22 and the second indoor heat exchanger 23 are located in the same air duct, and indoor return air generated by the indoor fan 24 sequentially passes through the second indoor heat exchanger 23 and the first indoor heat exchanger 22.
In this embodiment, the heat pump system has a cooling mode, four dehumidification and reheating modes, a heating mode and two defrosting modes, and the specific control modes are shown in the following tables 1 and 2.
TABLE 1 first table of correspondence between operating modes and control states of respective components
Figure BDA0002850860680000141
TABLE 2 second table of correspondence of operating modes and control states of the respective components
Figure BDA0002850860680000151
The connection relationship of each component in each operation mode is described in detail as follows:
as shown in fig. 2, in the cooling mode, the first four-way valve 2 and the second four-way valve 3 are both powered off, the control valve 4 is powered off, the indoor fan 24, the first outdoor fan 7 and the second outdoor fan 8 are all in an operating state, the first expansion valve 11, the second expansion valve 12 and the fourth expansion valve 21 are all in an open state, the third expansion valve 20 is in a closed state, the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6 are both used as condensers, the second indoor heat exchanger 23 is both used as an evaporator, and the first indoor heat exchanger 22 is in a closed state.
One path of the refrigerant discharged from the exhaust port of the compressor 1 enters the liquid storage tank 13 through the first connecting piece 25, the second connecting piece 26, the first four-way valve 2, the first outdoor heat exchanger 5 and the first expansion valve 11, and the other path of the refrigerant discharged from the exhaust port of the compressor 1 enters the liquid storage tank 13 through the first connecting piece 25, the second connecting piece 26, the second four-way valve 3, the second outdoor heat exchanger 6 and the second expansion valve 12. The refrigerant that has entered the receiver tank 13 flows out of the receiver tank 13, reaches the indoor unit 200 through the first stop valve 14 and the fourth stop valve 17, and then returns to the compressor 1 through the fourth expansion valve 21, the second indoor heat exchanger 23, the sixth stop valve 19, the third stop valve 16, and the fourth connection 28.
The cooling mode is not limited to the mode shown in fig. 2, and any one of the first or second outdoor heat exchangers 5 or 6 may be turned off by adjusting the valve relationship of the first and second four- way valves 2 and 3 as necessary, thereby forming a cooling mode different from that shown in fig. 2.
The embodiment of the utility model provides an in the refrigeration mode include multiple refrigeration mode simultaneously, can satisfy user's different demands.
As shown in fig. 3, in the first dehumidification and reheat mode, the first four-way valve 2 and the second four-way valve 3 are both powered off, the control valve 4 is energized, the indoor fan 24, the first outdoor fan 7 and the second outdoor fan 8 are all in an operating state, the first expansion valve 11, the second expansion valve 12, the third expansion valve 20 and the fourth expansion valve 21 are all in an open state, the first outdoor heat exchanger 5, the second outdoor heat exchanger 6 and the first indoor heat exchanger 22 are all used as condensers, and the second indoor heat exchanger 23 is used as an evaporator.
One path of the refrigerant discharged from the exhaust port of the compressor 1 enters the liquid storage tank 13 through the first connecting piece 25, the second connecting piece 26, the first four-way valve 2, the first outdoor heat exchanger 5 and the first expansion valve 11, and the other path of the refrigerant discharged from the exhaust port of the compressor 1 enters the liquid storage tank 13 through the first connecting piece 25, the second connecting piece 26, the second four-way valve 3, the second outdoor heat exchanger 6 and the second expansion valve 12. The refrigerant that has entered the receiver tank 13 flows out of the receiver tank 13, and then reaches the indoor unit 200 through the first stop valve 14 and the fourth stop valve 17. One path of the refrigerant discharged from the discharge port of the compressor 1 enters the first indoor heat exchanger 22 through the control valve 4, the second stop valve 15 and the fifth stop valve 18, then joins the refrigerant entering the indoor unit 200 from the reservoir tank 13 through the first stop valve 14 and the fourth stop valve 17 through the third expansion valve 20, and then returns to the compressor 1 through the fourth expansion valve 21, the second indoor heat exchanger 23, the sixth stop valve 19, the third stop valve 16 and the fourth connecting member 28.
In the indoor unit 200, the second indoor heat exchanger 23 is an evaporator, and can cool and dehumidify an indoor environment; the first indoor heat exchanger 22 is a condenser, which can release heat to the indoor, and avoid the over-low temperature of the indoor environment due to the requirement of humidity.
As shown in fig. 4, in the second dehumidification and reheat mode, the first four-way valve 2 is powered off, the second four-way valve 3 is powered on, the control valve 4 is powered on, the indoor fan 24 and the first outdoor fan 7 are both in an operating state, the second outdoor fan 8 is in an operating or stopped state, the first expansion valve 11, the third expansion valve 20 and the fourth expansion valve 21 are all in an open state, the second expansion valve 12 is in an open or closed state, the first outdoor heat exchanger 5 and the first indoor heat exchanger 22 are both used as condensers, the second indoor heat exchanger 23 is used as an evaporator, and the second outdoor heat exchanger 6 may not participate in the operation or may be used as an evaporator. When the second outdoor heat exchanger 6 is used as an evaporator, the second outdoor heat exchanger 6 can shunt the flow of the low-pressure side in the heat pump system, so that the heat exchange amount of the second indoor heat exchanger 23 is kept unchanged, and the indoor humidity control stability is kept.
When the second outdoor fan 8 is in a stopped state and the second expansion valve 12 is in a closed state, one path of the refrigerant discharged from the discharge port of the compressor 1 enters the liquid storage tank 13 through the first connecting member 25, the second connecting member 26, the first four-way valve 2, the first outdoor heat exchanger 5, and the first expansion valve 11. The refrigerant that has entered the receiver tank 13 flows out of the receiver tank 13, and then reaches the indoor unit 200 through the first stop valve 14 and the fourth stop valve 17. One path of the refrigerant discharged from the discharge port of the compressor 1 enters the first indoor heat exchanger 22 through the control valve 4, the second stop valve 15 and the fifth stop valve 18, then joins the refrigerant entering the indoor unit 200 from the reservoir tank 13 through the first stop valve 14 and the fourth stop valve 17 through the third expansion valve 20, and then returns to the compressor 1 through the fourth expansion valve 21, the second indoor heat exchanger 23, the sixth stop valve 19, the third stop valve 16 and the fourth connecting member 28. Wherein the second outdoor heat exchanger 6 does not participate in the operation.
When the second outdoor fan 8 is in an operating state and the second expansion valve 12 is in an open state, one path of the refrigerant discharged from the discharge port of the compressor 1 passes through the first connecting member 25, the second connecting member 26, the first four-way valve 2, the first outdoor heat exchanger 5, and the first expansion valve 11, and enters the liquid storage tank 13. The refrigerant that has entered the receiver tank 13 flows out of the receiver tank 13, and then reaches the indoor unit 200 through the first stop valve 14 and the fourth stop valve 17. One path of refrigerant discharged from the air outlet of the compressor 1 enters a first indoor heat exchanger 22 through a control valve 4, a second stop valve 15 and a fifth stop valve 18, then is merged with the refrigerant entering an indoor unit 200 from a liquid storage tank 13 through a first stop valve 14 and a fourth stop valve 17 through a third expansion valve 20, and then returns to the compressor 1 through a fourth expansion valve 21, a second indoor heat exchanger 23, a sixth stop valve 19, a third stop valve 16 and a fourth connecting piece 28; a part of the refrigerant passing through the third expansion valve 20 is also reversely flowed to the accumulator 13 through the fourth cutoff valve 17 and the first cutoff valve 14, and is returned to the compressor 1 through the second expansion valve 12, the second outdoor heat exchanger 6, the second four-way valve 3, the third connection 27 and the fourth connection 28. Wherein the second outdoor heat exchanger 6 is used as an evaporator.
As shown in fig. 5, in the third dehumidification and reheat mode, the first four-way valve 2 is powered on, the second four-way valve 3 is powered off, the control valve 4 is powered on, the indoor fan 24 and the second outdoor fan 8 are both in an operating state, the first outdoor fan 7 is in an operating or stopped state, the second expansion valve 12, the third expansion valve 20 and the fourth expansion valve 21 are all in an open state, the first expansion valve 11 is in an open or closed state, the second outdoor heat exchanger 6 and the first indoor heat exchanger 22 are both used as condensers, the second indoor heat exchanger 23 is used as an evaporator, and the first outdoor heat exchanger 5 may not participate in the operation or may be used as an evaporator. When the first outdoor heat exchanger 5 is used as an evaporator, the first outdoor heat exchanger 5 can shunt the flow of the low-pressure side in the heat pump system, so that the heat exchange amount of the second indoor heat exchanger 23 is kept unchanged, and the indoor humidity control stability is kept.
When the first outdoor fan 7 is in a stopped state and the first expansion valve 11 is in a closed state, one path of the refrigerant discharged from the discharge port of the compressor 1 passes through the first connecting member 25, the second connecting member 26, the second four-way valve 3, the second outdoor heat exchanger 6, and the second expansion valve 12, and enters the liquid storage tank 13. The refrigerant that has entered the receiver tank 13 flows out of the receiver tank 13, and then reaches the indoor unit 200 through the first stop valve 14 and the fourth stop valve 17. One path of the refrigerant discharged from the discharge port of the compressor 1 enters the first indoor heat exchanger 22 through the control valve 4, the second stop valve 15 and the fifth stop valve 18, then joins the refrigerant entering the indoor unit 200 from the reservoir tank 13 through the first stop valve 14 and the fourth stop valve 17 through the third expansion valve 20, and then returns to the compressor 1 through the fourth expansion valve 21, the second indoor heat exchanger 23, the sixth stop valve 19, the third stop valve 16 and the fourth connecting member 28. Wherein the first outdoor heat exchanger 5 does not participate in the operation.
When the first outdoor fan 7 is in an operating state and the first expansion valve 11 is in an open state, one path of the refrigerant discharged from the exhaust port of the compressor 1 passes through the first connecting member 25, the second connecting member 26, the second four-way valve 3, the second outdoor heat exchanger 6, and the second expansion valve 12, and enters the liquid storage tank 13. The refrigerant that has entered the receiver tank 13 flows out of the receiver tank 13, and then reaches the indoor unit 200 through the first stop valve 14 and the fourth stop valve 17. One path of refrigerant discharged from the air outlet of the compressor 1 enters a first indoor heat exchanger 22 through a control valve 4, a second stop valve 15 and a fifth stop valve 18, then is merged with the refrigerant entering an indoor unit 200 from a liquid storage tank 13 through a first stop valve 14 and a fourth stop valve 17 through a third expansion valve 20, and then returns to the compressor 1 through a fourth expansion valve 21, a second indoor heat exchanger 23, a sixth stop valve 19, a third stop valve 16 and a fourth connecting piece 28; a part of the refrigerant passing through the third expansion valve 20 is also reversely flowed to the accumulator 13 through the fourth cutoff valve 17 and the first cutoff valve 14, and is returned to the compressor 1 through the first expansion valve 11, the first outdoor heat exchanger 5, the first four-way valve 2, the third connection member 27 and the fourth connection member 28. Wherein the first outdoor heat exchanger 5 is used as an evaporator.
As shown in fig. 6, in the fourth dehumidification and reheat mode, the first four-way valve 2 and the second four-way valve 3 are both energized, the control valve 4 is energized, the indoor fan 24 is in an operating state, the first outdoor fan 7 and the second outdoor fan 8 are both in a stopped state, the third expansion valve 20 and the fourth expansion valve 21 are both in an open state, the first expansion valve 11 and the second expansion valve 12 are in a closed state, the first indoor heat exchanger 22 is used as a condenser, the second indoor heat exchanger 23 is used as an evaporator, and the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6 are both in a closed state.
The refrigerant discharged from the discharge port of the compressor 1 enters the first indoor heat exchanger 22 through the control valve 4, the second stop valve 15, and the fifth stop valve 18, and then returns to the compressor 1 through the third expansion valve 20, the fourth expansion valve 21, the second indoor heat exchanger 23, the sixth stop valve 19, the third stop valve 16, and the fourth connection member 28.
In the indoor unit 200, the second indoor heat exchanger 23 is an evaporator, and can cool and dehumidify an indoor environment; the first indoor heat exchanger 22 is a condenser, which can release heat to the indoor, and avoid the over-low temperature of the indoor environment due to the requirement of humidity. The two outdoor heat exchangers are both in a state of stopping working, the cold quantity distribution of the two indoor heat exchangers is uniform, and the dehumidification and temperature control effects are good.
In four dehumidification and reheating modes, dehumidification and reheating functions are realized through the mutual matching of the first indoor heat exchanger 22 and the second indoor heat exchanger 23, the second indoor heat exchanger 23 is responsible for dehumidification and cooling, because the indoor humidity load is unequal to the cold load, the output of the heat pump system takes the larger of the humidity load and the cold load as the adjusting basis, when the humidity load is larger than the cold load, the indoor temperature can be overshot (the current indoor environment temperature is lower than the set temperature), at the moment, the first indoor heat exchanger 22 intervenes to adjust the cold load, namely, the overlarge refrigerating capacity is compensated and output, and the indoor temperature is matched with the set value.
As shown in fig. 7, in the heating mode, the first four-way valve 2 and the second four-way valve 3 are both powered on, the control valve 4 is powered on, the indoor fan 24, the first outdoor fan 7 and the second outdoor fan 8 are all in an operating state, the first expansion valve 11, the second expansion valve 12 and the third expansion valve 20 are all in an open state, the fourth expansion valve 21 is in a closed state, the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6 are all used as evaporators, the first indoor heat exchanger 22 is used as a condenser, and the second indoor heat exchanger 23 is in a closed state.
Refrigerant discharged from an exhaust port of the compressor 1 enters the first indoor heat exchanger 22 through the control valve 4, the second stop valve 15 and the fifth stop valve 18, then enters the liquid storage tank 13 through the third expansion valve 20, the fourth stop valve 17 and the first stop valve 14, and after the refrigerant entering the liquid storage tank 13 flows out of the liquid storage tank 13, one path of the refrigerant returns to the compressor 1 through the first expansion valve 11, the first outdoor heat exchanger 5, the first four-way valve 2, the third connecting piece 27 and the fourth connecting piece 28; and the other path is returned to the compressor 1 via the second expansion valve 12, the second outdoor heat exchanger 6, the second four-way valve 3, the third connection 27, and the fourth connection 28. The first indoor heat exchanger 22 is used as a condenser to heat the indoor environment. The second indoor heat exchanger 23 is in a closed state.
The embodiment of the present invention can close any one of the first outdoor heat exchanger 5 or the second outdoor heat exchanger 6 by adjusting the valve relationship between the first four-way valve 2 and the second four-way valve 3 according to actual needs, except the heating mode shown in fig. 7, thereby forming a heating mode different from that shown in fig. 7.
The embodiment of the utility model provides an in the refrigeration mode include multiple heating mode simultaneously, can satisfy user's different demands.
As shown in fig. 8, in the first defrosting mode, the first four-way valve 2 is powered on, the second four-way valve 3 is powered off, the control valve 4 is powered on, the indoor fan 24, the first outdoor fan 7 and the second outdoor fan 8 are all in an operating state, the first expansion valve 11, the second expansion valve 12 and the third expansion valve 20 are all in an open state, the fourth expansion valve 21 is in a closed state, the second outdoor heat exchanger 6 and the first indoor heat exchanger 22 are all used as condensers, the second indoor heat exchanger 23 does not participate in the operation, and the first outdoor heat exchanger 5 is used as an evaporator.
One path of the refrigerant discharged from the exhaust port of the compressor 1 passes through the first connecting member 25, the second connecting member 26, the second four-way valve 3, the second outdoor heat exchanger 6, and the second expansion valve 12 to enter the liquid storage tank 13. One path of the refrigerant discharged from the discharge port of the compressor 1 enters the first indoor heat exchanger 22 through the control valve 4, the second stop valve 15 and the fifth stop valve 18, and then enters the liquid storage tank 13 through the third expansion valve 20, the fourth stop valve 17 and the first stop valve 14. The two refrigerant paths are merged in the liquid storage tank 13, then flow out of the liquid storage tank 13, and then return to the compressor 1 through the first expansion valve 11, the first outdoor heat exchanger 5, the first four-way valve 2, the third connecting member 27 and the fourth connecting member 28.
As shown in fig. 9, in the second defrosting mode, the first four-way valve 2 is powered off, the second four-way valve 3 is powered on, the control valve 4 is powered on, the indoor fan 24, the first outdoor fan 7 and the second outdoor fan 8 are all in an operating state, the first expansion valve 11, the second expansion valve 12 and the third expansion valve 20 are all in an open state, the fourth expansion valve 21 is in a closed state, the first outdoor heat exchanger 5 and the first indoor heat exchanger 22 are all used as condensers, the second indoor heat exchanger 23 does not participate in the operation, and the second outdoor heat exchanger 6 is used as an evaporator.
One path of the refrigerant discharged from the exhaust port of the compressor 1 passes through the first connecting member 25, the second connecting member 26, the first four-way valve 2, the first outdoor heat exchanger 5, and the first expansion valve 11 to enter the liquid storage tank 13. One path of the refrigerant discharged from the discharge port of the compressor 1 enters the first indoor heat exchanger 22 through the control valve 4, the second stop valve 15 and the fifth stop valve 18, and then enters the liquid storage tank 13 through the third expansion valve 20, the fourth stop valve 17 and the first stop valve 14. The two refrigerant paths are merged in the liquid storage tank 13, then flow out of the liquid storage tank 13, and then return to the compressor 1 through the second expansion valve 12, the second outdoor heat exchanger 6, the second four-way valve 3, the third connecting piece 27 and the fourth connecting piece 28.
In the outdoor unit 100, the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6 alternately serve as an evaporator and a condenser, and heat emitted from the condenser can be used to melt frost formed by the evaporator due to heat absorption, thereby achieving asynchronous defrosting.
In one embodiment, when a cooling load or a moisture load exists in the room, the system firstly enters a refrigeration mode, the cooling load can be represented by a functional relation of a difference value of the indoor environment temperature and the set temperature, and the moisture load can be represented by a functional relation of a difference value of the indoor moisture content and the set moisture content. When the moisture load is larger than the cooling load, for example, the moisture content is not lower than the set value, but the indoor temperature is already lower than the set value, the first dehumidification and reheating mode is entered.
In the first dehumidification and reheating mode, if the humidity load has reached the preset value but the heat load is not satisfied (the current indoor temperature is lower than the preset temperature), the number of steps of the third expansion valve 20 is increased, and the heat exchange amount of the first indoor heat exchanger 22 is increased; if the heat exchange amount of the first indoor heat exchanger 22 is the largest (the heat exchange amount of the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6 is reduced to the lowest), the indoor heat load requirement is still not met (the current indoor temperature is lower than the preset temperature), entering a second dehumidification and reheating mode or a third dehumidification and reheating mode; the compressor 1 improves the capacity output, further increases the heat exchange amount of the first indoor heat exchanger 22, switches to the first outdoor heat exchanger 5 or the second outdoor heat exchanger 6 at the low-pressure side, and shunts the low-pressure side flow output by the compressor 1, so that the heat exchange amount of the second indoor heat exchanger 23 is kept unchanged, and the humidity control is kept stable.
When the indoor heat load is required, a first heating mode or a second heating mode is entered, and the first defrosting mode or the second defrosting mode is triggered according to the condition corresponding to whether the corresponding outdoor heat exchanger needs defrosting.
When the indoor temperature is lower than the set temperature, the temperature needs to be raised, but the heat pump system has the problem that the outdoor heat exchanger frosts and defrosts, so that the temperature fluctuation can not meet the requirement, and defrosting is needed at the moment. The heat pump system uses the double-chamber outer side heat exchanger, adopts the first defrosting mode and the second defrosting mode to realize asynchronous defrosting, and the indoor side heat exchanger still keeps a high-pressure state during defrosting, keeps the heat output of the indoor side, and reduces the fluctuation of the indoor temperature caused by the fact that the indoor side heat exchanger does not heat during defrosting of the common heat pump air conditioner.
Based on foretell heat pump system, the utility model also provides a heat pump system's control method, this control method is applied to and controls foretell heat pump system, include:
determining the working modes of the heat pump system, wherein the working modes comprise a refrigeration mode, a heating mode and a dehumidification reheating mode;
the operation of the valve assembly 40 in the heat pump system is controlled according to a preset control strategy and based on the operating mode.
Based on foretell heat pump system, the utility model also provides a heat pump system's control method, this control method is applied to and controls foretell heat pump system, include:
determining the working modes of the heat pump system, wherein the working modes comprise a refrigeration mode, a heating mode and a dehumidification reheating mode;
and controlling the actions of the first four-way valve 2, the second four-way valve 3 and the control valve 4 in the heat pump system according to a preset control strategy and based on the working mode.
In some embodiments, the control method comprises:
when the working mode is a first dehumidification and reheating mode, controlling the first port and the second port of the first four-way valve 2 to be communicated, controlling the third port and the fourth port to be communicated, controlling the first port and the second port of the second four-way valve 3 to be communicated, and controlling the third port and the fourth port to be communicated; the control valve 4 is controlled to be in a conducting state.
In some embodiments, the control method comprises:
when the working mode is a second dehumidification and reheating mode, controlling the first port and the second port of the first four-way valve 2 to be communicated, controlling the third port and the fourth port to be communicated, controlling the first port and the fourth port of the second four-way valve 3 to be communicated, and controlling the second port and the third port to be communicated; the control valve 4 is controlled to be in a conducting state.
In some embodiments, the control method comprises:
when the working mode is the second dehumidification and reheating mode, controlling the first outdoor heat exchanger 5 to be in a closed state; alternatively, the first and second electrodes may be,
when the working mode is the second dehumidification and reheating mode, the first outdoor heat exchanger 5 is controlled to enter the working state and is used as an evaporator; and
when the indoor humidity is reduced to the preset humidity and the indoor temperature is less than the preset temperature, the operating frequency of the compressor 1 is increased.
In some embodiments, the control method comprises:
when the working mode is a third dehumidification and reheating mode, controlling the first port and the fourth port of the first four-way valve 2 to be communicated, the second port and the third port to be communicated, the first port and the second port of the second four-way valve 3 to be communicated, and the third port and the fourth port to be communicated; the control valve 4 is in the off state.
In some embodiments, the control method comprises:
when the working mode is the third dehumidification and reheating mode, the second outdoor heat exchanger 6 is controlled to be in a closed state; alternatively, the first and second electrodes may be,
when the working mode is the third dehumidification and reheating mode, the second outdoor heat exchanger 6 is controlled to enter the working state and is used as an evaporator; and
when the indoor humidity is reduced to the preset humidity and the indoor temperature is less than the preset temperature, the operating frequency of the compressor 1 is increased.
In some embodiments, the control method comprises:
when the working mode is a fourth dehumidification and reheating mode, controlling the first port and the fourth port of the first four-way valve 2 to be communicated, the second port and the third port to be communicated, and controlling the first port and the fourth port of the second four-way valve 3 to be communicated, and the second port and the third port to be communicated; the control valve 4 is in the off state.
In some embodiments, the control method comprises:
when the working mode is the fourth dehumidification and reheating mode, controlling the first indoor heat exchanger 5 and the second outdoor heat exchanger 6 to be in a closed state; alternatively, the first and second electrodes may be,
when the working mode is the fourth dehumidification and reheating mode, the first indoor heat exchanger 5 and the second outdoor heat exchanger 6 are controlled to be in a working state and used as evaporators; and
when the indoor humidity is reduced to the preset humidity and the indoor temperature is less than the preset temperature, the operating frequency of the compressor 1 is increased.
The utility model also provides a heat pump system's controlling means, including the memory with be coupled to the treater of memory, the treater is configured to carry out heat pump system's control method based on the instruction of storage in the memory.
The utility model also provides an air conditioning equipment, including foretell heat pump system and/or foretell heat pump system's controlling means.
The utility model also provides a computer readable storage medium, the computer readable storage medium storage has the computer instruction, and the control method of heat pump system is carried by the treater to the computer instruction.
In some embodiments, the memory includes high-speed RAM memory, non-volatile memory (non-volatile memory), or the like, and in other embodiments, the memory includes a memory array. The storage may also be partitioned and the blocks may be combined into virtual volumes according to certain rules. The processor includes a central processing unit CPU, or an application Specific Integrated circuit asic, or one or more Integrated circuits configured to implement the control method of the heat pump system of the present disclosure.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the utility model discloses a do not deviate from under the prerequisite of the principle, still can be right the utility model discloses a specific embodiment modifies or carries out the equivalent replacement to some technical features, and these are modified and should be covered with the equivalent replacement in the middle of the technical scheme scope of the utility model.

Claims (13)

1. A heat pump system, comprising:
a compressor (1);
a first indoor heat exchanger (22);
a second indoor heat exchanger (23);
an outdoor heat exchanger (30); and
a valve assembly (40) connected to the air outlet and the air inlet of the compressor (1), the first indoor heat exchanger (22), the second indoor heat exchanger (23) and the outdoor heat exchanger (30), wherein the valve assembly (40) is configured to control the flow direction of a refrigerant and/or the on-off of a connecting pipeline so as to switch the heat pump system between different working modes;
wherein the operation modes include a cooling mode, a heating mode and a dehumidification and reheat mode, in the dehumidification and reheat mode, the valve assembly (40) is configured to communicate the exhaust port of the compressor (1) with the first interface of the first indoor heat exchanger (22) so that the first indoor heat exchanger (22) functions as a condenser;
the valve assembly (40) comprises a control valve (4), the control valve (4) is arranged on a connecting pipeline between an exhaust port of the compressor (1) and a first interface of the first indoor heat exchanger (22), and the control valve (4) adopts a two-way ball valve;
the heat pump system further comprises a first connecting piece (25) communicated with the exhaust port of the compressor (1), and the control valve (4) is directly connected with the first connecting piece (25).
2. The heat pump system according to claim 1, wherein the outdoor heat exchanger (30) comprises a first outdoor heat exchanger (5) and a second outdoor heat exchanger (6), and in the dehumidification and reheat mode the valve assembly (40) is further configured to cause at least one of the first outdoor heat exchanger (5) and the second outdoor heat exchanger (6) to function as a condenser or to cause neither of the first outdoor heat exchanger (5) and the second outdoor heat exchanger (6) to function.
3. The heat pump system according to claim 2, wherein the dehumidification-reheat mode includes a first dehumidification-reheat mode in which the first outdoor heat exchanger (5) and the second outdoor heat exchanger (6) both function as a condenser, a second dehumidification-reheat mode, a third dehumidification-reheat mode, and a fourth dehumidification-reheat mode; in the second dehumidification and reheat mode, the first outdoor heat exchanger (5) is used as a condenser, and the second outdoor heat exchanger (6) is in a closed state or used as an evaporator; in the third dehumidification and reheat mode, the second outdoor heat exchanger (6) is used as a condenser, and the first outdoor heat exchanger (5) is in a closed state or used as an evaporator; in the fourth dehumidification and reheating mode, neither the first outdoor heat exchanger (5) nor the second outdoor heat exchanger (6) works; the valve assembly (40) is configured to enable the heat pump system to switch between the first dehumidification and reheat mode, the second dehumidification and reheat mode, the third dehumidification and reheat mode, and the fourth dehumidification and reheat mode.
4. The heat pump system according to claim 1, wherein said outdoor heat exchanger (30) comprises a first outdoor heat exchanger (5) and a second outdoor heat exchanger (6), and said operating mode comprises a defrost mode in which said valve assembly (40) is configured such that one of said first outdoor heat exchanger (5) and said second outdoor heat exchanger (6) functions as a condenser and the other of said first outdoor heat exchanger (5) and said second outdoor heat exchanger (6) functions as an evaporator.
5. The heat pump system according to claim 4, wherein the defrosting mode includes a first defrosting mode in which the first outdoor heat exchanger (5) functions as a condenser and the second outdoor heat exchanger (6) functions as an evaporator; in the second defrosting mode, the first outdoor heat exchanger (5) functions as an evaporator and the second outdoor heat exchanger (6) functions as a condenser; the valve assembly (40) is configured to enable the heat pump system to switch between the first and second defrost modes.
6. The heat pump system according to any one of claims 2 to 5, further comprising a first outdoor fan (7) and a second outdoor fan (8), wherein the first outdoor fan (7) and the first outdoor heat exchanger (5) are located in a first air duct, the second outdoor fan (8) and the second outdoor heat exchanger (6) are located in a second air duct, and the first air duct and the second air duct are independently arranged.
7. The heat pump system according to claim 1, further comprising an indoor fan (24), wherein the indoor fan (24), the first indoor heat exchanger (22) and the second indoor heat exchanger (23) are located in the same air duct, and indoor return air generated by the indoor fan (24) passes through the second indoor heat exchanger (23) and the first indoor heat exchanger (22) in sequence.
8. The heat pump system according to claim 1, wherein the outdoor heat exchanger (30) includes a first outdoor heat exchanger (5) and a second outdoor heat exchanger (6), the valve assembly (40) includes a first four-way valve (2) and a second four-way valve (3), a first port of the first four-way valve (2) communicates with an exhaust port of the compressor (1), a second port of the first four-way valve (2) communicates with a first port of the first outdoor heat exchanger (5), a third port and a fourth port of the first four-way valve (2) both communicate with an intake port of the compressor (1), a first port of the second four-way valve (3) communicates with an exhaust port of the compressor (1), a second port of the second four-way valve (3) communicates with a first port of the second outdoor heat exchanger (6), and a third port and a fourth port of the second four-way valve (3) are both communicated with a suction port of the compressor (1).
9. Heat pump system according to claim 8, wherein the valve assembly (40) further comprises a first throttling element (9), the first throttling element (9) being connected between the fourth port of the first four-way valve (2) and the suction of the compressor (1).
10. The heat pump system according to claim 8, wherein the valve assembly (40) further comprises a second throttling element (10), the second throttling element (10) being connected between a fourth port of the second four-way valve (3) and a suction port of the compressor (1).
11. The heat pump system according to claim 1, further comprising an outdoor unit (100), wherein the outdoor unit (100) comprises the compressor (1), the outdoor heat exchanger (30), the valve assembly (40), a first expansion valve (11), and a second expansion valve (12), wherein the outdoor heat exchanger (30) comprises a first outdoor heat exchanger (5) and a second outdoor heat exchanger (6), the first expansion valve (11) is connected between a second connection of the first outdoor heat exchanger (5) and a first connection of the outdoor unit (100), and the second expansion valve (12) is connected between a second connection of the second outdoor heat exchanger (6) and the first connection of the outdoor unit (100).
12. The heat pump system according to claim 11, further comprising an indoor unit (200), wherein the indoor unit (200) includes the first indoor heat exchanger (22), the second indoor heat exchanger (23), a third expansion valve (20), and a fourth expansion valve (21), the third expansion valve (20) is connected between the second port of the first indoor heat exchanger (22) and the first port of the indoor unit (200), the fourth expansion valve (21) is connected between the first port of the second indoor heat exchanger (23) and the first port of the indoor unit (200), and the first port of the indoor unit (200) communicates with the first port of the outdoor unit (100).
13. An air conditioning apparatus comprising the heat pump system according to any one of claims 1 to 12.
CN202023124634.8U 2020-12-22 2020-12-22 Heat pump system and air conditioning equipment Active CN215113324U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023124634.8U CN215113324U (en) 2020-12-22 2020-12-22 Heat pump system and air conditioning equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023124634.8U CN215113324U (en) 2020-12-22 2020-12-22 Heat pump system and air conditioning equipment

Publications (1)

Publication Number Publication Date
CN215113324U true CN215113324U (en) 2021-12-10

Family

ID=79307991

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023124634.8U Active CN215113324U (en) 2020-12-22 2020-12-22 Heat pump system and air conditioning equipment

Country Status (1)

Country Link
CN (1) CN215113324U (en)

Similar Documents

Publication Publication Date Title
CN112556233B (en) Heat pump system, control method and control device thereof, air conditioning equipment and storage medium
CN214148412U (en) Heat pump system and air conditioning equipment
CN113154522B (en) Multi-connected air conditioner system and defrosting control method
CN111811035A (en) Dehumidification and reheating unit type air conditioning system and control method thereof
US20230250982A1 (en) Heat Pump System, Control Method and Apparatus Thereof, Air Conditioning Device and Storage Medium
CN213480647U (en) Heat pump system and air conditioning equipment thereof
CN112228992B (en) Heat pump system, control method and control device thereof, air conditioning equipment and storage medium
CN112902478A (en) Air conditioner heat exchange structure, air conditioner external unit, air conditioner system and air conditioner system control method
CN210832213U (en) Air conditioner
CN112696809A (en) Air conditioner, control method, controller, air conditioning system and storage medium
CN111811036A (en) Dehumidification and reheating multi-connected air conditioning system and control method thereof
CN112268381A (en) Heat pump system, control method and control device thereof, air conditioning equipment and storage medium
CN215113324U (en) Heat pump system and air conditioning equipment
CN213514499U (en) Heat pump system and air conditioning equipment
CN214148413U (en) Heat pump system and air conditioning equipment
CN213778228U (en) Heat pump system and air conditioning equipment
CN112797669B (en) Heat pump system, control method and control device thereof and air conditioning equipment
CN214581889U (en) Air conditioner heat exchange structure, air conditioner outer unit and air conditioning system
CN112303954B (en) Heat pump system, control method and device thereof, air conditioning equipment and storage medium
CN213687346U (en) Evaporation cold and hot pump unit
CN210892242U (en) Heat exchange system
CN210740787U (en) Heat exchange system
CN108633223B (en) Control method of air conditioner battery heat pump
CN112902479A (en) Air conditioner heat exchange structure, air conditioner system, control method of air conditioner system and air conditioner outdoor unit
CN215951815U (en) Heat pump system and air conditioning equipment

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant