CN116358182A - Cold and warm combined supply system and control method - Google Patents
Cold and warm combined supply system and control method Download PDFInfo
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- CN116358182A CN116358182A CN202310177176.3A CN202310177176A CN116358182A CN 116358182 A CN116358182 A CN 116358182A CN 202310177176 A CN202310177176 A CN 202310177176A CN 116358182 A CN116358182 A CN 116358182A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 239000003507 refrigerant Substances 0.000 claims description 66
- 230000001276 controlling effect Effects 0.000 claims description 29
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000005057 refrigeration Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The application provides a cooling and heating combined supply system and a control method, wherein the combined supply system comprises an outdoor heat exchanger, a four-way valve, a first indoor heat exchanger and a first throttling device which are sequentially connected through pipelines, and the first throttling device is connected with the outdoor heat exchanger; the four-way valve is connected with the compressor; at least one second indoor heat exchanger, the first end pipeline of the second indoor heat exchanger is communicated with the pipeline between the outdoor heat exchanger and the first throttling device; the second end pipeline of the second indoor heat exchanger is communicated with a pipeline between the outdoor heat exchanger and the four-way valve. And the second indoor heat exchanger is added to recycle the cold energy or heat of the outdoor heat exchanger, so that the energy-saving effect is realized.
Description
Technical Field
The application relates to the field of energy utilization of household heat exchange equipment, in particular to a cooling and heating combined supply system and a control method.
Background
Household heat exchange equipment is various in types, such as air conditioners, water heaters, refrigerators and the like, but none of the equipment can meet the requirements of refrigeration and heating at the same time; for example, indoor heat exchange equipment of a household one-to-many air conditioner can only set refrigeration or heating at the same time, and cannot independently set an operation mode. In addition, the existing air conditioner only needs cold in summer, and the heat is directly discharged to the outside and is not utilized; the air-powered water heater requires a heat source and the cold is not utilized.
At present, the heat exchange device in the prior art does not realize recycling of heat exchange energy, for example, the heating device can provide heat for a user by utilizing condensation heat exchange energy of the refrigerating device; therefore, designing a cooling and heating combined supply system and a control method which are convenient to use and energy-saving is a problem to be solved by the person skilled in the art.
Disclosure of Invention
The invention aims at overcoming the defects in the technology, and provides a cooling and heating combined supply system and a control method, which can recycle the cold quantity or heat of an outdoor heat exchanger to achieve the effect of energy conservation.
In order to solve the problems, the application provides a cooling and heating combined supply system which comprises an outdoor heat exchanger, a four-way valve, a first indoor heat exchanger and a first throttling device which are sequentially connected through pipelines, wherein the first throttling device is connected with the outdoor heat exchanger; the four-way valve is connected with the compressor;
at least one second indoor heat exchanger connected in parallel with the outdoor heat exchanger, wherein a first end pipeline of the second indoor heat exchanger is communicated with a pipeline between the outdoor heat exchanger and the first throttling device; the second end pipeline of the second indoor heat exchanger is communicated with a pipeline between the outdoor heat exchanger and the four-way valve.
Preferably, the first end pipeline of the second indoor heat exchanger is sequentially connected with the second throttling device and the three-way valve, and the pipeline of the three-way valve is communicated with the pipeline between the second indoor heat exchanger and the second throttling device;
the second end pipeline of the second indoor heat exchanger is split into a first branch pipeline and a second branch pipeline, the pipeline of the first branch pipeline is communicated with the pipeline between the four-way valve and the first indoor heat exchanger, and the pipeline of the second branch pipeline is communicated with the pipeline between the outdoor heat exchanger and the four-way valve;
the third valve is arranged on the first branch and is used for controlling the flow of the refrigerant entering or exiting the second indoor heat exchanger branch through the first branch.
Preferably, the second valve is disposed on the second branch, and the second valve is used for controlling the flow rate of the refrigerant entering or exiting the second indoor heat exchanger branch through the second branch.
Preferably, the heat exchanger comprises a first valve arranged on a pipeline between the outdoor heat exchanger and the four-way valve, and the first valve controls the flow of the refrigerant entering or exiting the outdoor heat exchanger.
Preferably, the device further comprises a fourth valve, which is arranged on a pipeline between the first indoor heat exchanger and the four-way valve and is used for controlling the flow of the refrigerant entering or exiting the first indoor heat exchanger;
and a fifth valve arranged on a pipeline between the outdoor heat exchanger and the first throttling device, wherein the fifth valve controls the flow of the refrigerant entering or exiting the first throttling device.
The invention also provides a control method of the cooling and heating combined supply system, which comprises the step of controlling the modes of the first indoor heat exchange and the second indoor heat exchanger through the combined supply system according to any one of the technical schemes.
Preferably, the first end pipeline of the second indoor heat exchanger is sequentially connected with the second throttling device and the three-way valve, and the pipeline of the three-way valve is communicated with the pipeline between the second indoor heat exchanger and the second throttling device;
the second end pipeline of the second indoor heat exchanger is split into a first branch pipeline and a second branch pipeline, the pipeline of the first branch pipeline is communicated with the pipeline between the four-way valve and the first indoor heat exchanger, and the pipeline of the second branch pipeline is communicated with the pipeline between the outdoor heat exchanger and the four-way valve;
the third valve is arranged on the first branch and is used for controlling the flow of the refrigerant entering or exiting the second indoor heat exchanger branch through the first branch;
the second valve is arranged on the second branch and is used for controlling the flow of the refrigerant entering or exiting the second indoor heat exchanger branch through the second branch;
when the first indoor heat exchanger is required to work and the second indoor heat exchanger is not working, the second valve and the third valve are controlled to be closed.
Preferably, when the first indoor heat exchanger and the second indoor heat exchanger are required to be simultaneously cooled or heated, the second valve is controlled to be closed, the third valve is opened, and the three-way valve is regulated to enable the refrigerant to pass through the second throttling device.
Preferably, when the first indoor heat exchanger and the second indoor heat exchanger are used for refrigerating at the same time, the opening of the fifth valve is controlled and regulated, and the flow of the refrigerant flowing into the first indoor heat exchanger is regulated;
when the first indoor heat exchanger and the second indoor heat exchanger are in a heating mode, the opening degree of the fourth valve and/or the third valve is controlled and regulated, and the flow rate of the refrigerant flowing into the first indoor heat exchanger and the second indoor heat exchanger is regulated.
Preferably, the four-way valve comprises a fourth valve which is arranged on a pipeline between the first indoor heat exchanger and the four-way valve and is used for controlling the flow of the refrigerant entering or exiting the first indoor heat exchanger;
a fifth valve arranged on the pipeline between the outdoor heat exchanger and the first throttling device, the fifth valve controlling the flow rate of the refrigerant entering or exiting the first throttling device;
when the second indoor heat exchanger works, the fourth valve, the fifth valve and the second valve are controlled to be closed, the third valve is opened, the three-way valve is regulated to enable the refrigerant to flow in or flow out from the second throttling device, and refrigeration or heating of the second indoor heat exchanger is achieved.
Preferably, the heat exchanger comprises a first valve, wherein the first valve is arranged on a pipeline between the outdoor heat exchanger and the four-way valve and controls the flow of the refrigerant entering or exiting the outdoor heat exchanger;
when the first indoor heat exchanger and the second indoor heat exchanger work and the states are different, the control method further comprises a method for adjusting the heat exchange efficiency of the second indoor heat exchanger, and the method specifically comprises the following steps:
acquiring a set temperature T1 of a first indoor heat exchanger, a set temperature T2 of a second indoor heat exchanger and an environment temperature T1 of the current first indoor heat exchanger, and an environment temperature T2 of the current second indoor heat exchanger;
calculating Δt1 and Δt2, wherein Δt1 is the difference between T1 and T1, and Δt2 is the difference between T2 and T2;
calculating a difference value t=deltat1-deltat2+T of heat exchange requirements of the indoor side heat exchanger, wherein T is a compensation temperature;
judging whether t is less than or equal to 0, if so, completely closing the first valve and completely opening the second valve; if not, the opening degrees of the first valve 1 and the second valve 2 are controlled according to the magnitude of Δt2.
Preferably, the adjustment of the opening of the first valve and/or the second valve requires 4 minutes after which Δt1, Δt2 are recalculated.
The application provides a cooling and heating combined supply system which comprises an outdoor heat exchanger, a four-way valve, a first indoor heat exchanger and a first throttling device which are sequentially connected through pipelines, wherein the first throttling device is connected with the outdoor heat exchanger; the four-way valve is connected with the compressor; at least one second indoor heat exchanger is added, and a first end pipeline of the second indoor heat exchanger is communicated with a pipeline between the outdoor heat exchanger and the first throttling device; the second end pipeline of the second indoor heat exchanger is communicated with a pipeline between the outdoor heat exchanger and the four-way valve. And the cooling capacity or the heat of the outdoor heat exchanger is split through the added second indoor heat exchanger, so that the energy recycling is realized.
Drawings
FIG. 1 is a state diagram of an embodiment of the present application operating in mode one;
FIG. 2 is a state diagram of an embodiment of the present application operating in mode two;
FIG. 3 is a state diagram of the embodiment of the present application operating in mode three;
FIG. 4 is a state diagram of an embodiment of the present application operating in mode four;
FIG. 5 is a state diagram of the embodiment of the present application operating in mode five;
FIG. 6 is a state diagram of an embodiment of the present application operating in mode six;
FIG. 7 is a state diagram of an embodiment of the present application operating in mode seven;
FIG. 8 is a state diagram of an embodiment of the present application operating in mode eight;
fig. 9 is a flowchart of a refrigerant flow rate adjusting and controlling method for a second indoor heat exchanger according to an embodiment of the present application
The reference numerals are expressed as:
the outdoor heat exchanger 1, the first valve 11, the four-way valve 2, the first indoor heat exchanger 3, the first throttle device 31, the fourth valve 32, the fifth valve 33, the second indoor heat exchanger 4, the second valve 41, the third valve 42, the second throttle device 43, the three-way valve 44, and the compressor 5.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.
As shown in fig. 1-8, the present application provides a cooling and heating combined supply system, which comprises an outdoor heat exchanger 1, a four-way valve 2, a first indoor heat exchanger 3 and a first throttling device 31 which are sequentially connected through pipelines, wherein the first throttling device 31 is connected with the outdoor heat exchanger 1; the four-way valve 2 is connected with the compressor 5;
at least one second indoor heat exchanger 4 connected in parallel with the outdoor heat exchanger 1, the first end pipeline of the second indoor heat exchanger 4 being communicated with the pipeline between the outdoor heat exchanger 1 and the first throttling device 31; the second end pipeline of the second indoor heat exchanger 4 is communicated with a pipeline between the outdoor heat exchanger 1 and the four-way valve 2.
When the outdoor heat exchanger 1 heats and the first indoor heat exchanger 3 cools, the refrigerant flows out from the compressor 5, passes through the four-way valve 2, and then, one part of the refrigerant flows into the outdoor heat exchanger 1, and the other part of the refrigerant enters the second indoor heat exchanger 4 along the second end of the second indoor heat exchanger 4, and when the refrigerant flows out from the second indoor heat exchanger 4, the refrigerant merges with the refrigerant of the outdoor heat exchanger 1 and flows into the first throttling device 31; that is, in the cycle in which the first indoor heat exchanger 3 is refrigerating, a part of the refrigerant flows into the second indoor heat exchanger 4, and the heating function of the second indoor heat exchanger 4 is realized, and the second indoor heat exchanger 4 may be a heat exchanger in a water heater.
When the outdoor heat exchanger 1 is used for refrigerating and the first indoor heat exchanger 3 is used for heating, after the refrigerant flows out along the first throttling device 31, one part of the refrigerant flows into the second indoor heat exchanger 4, the other part of the refrigerant flows into the outdoor heat exchanger 1, and when the refrigerant flows out of the second indoor heat exchanger 4, the refrigerant is combined with the refrigerant of the outdoor heat exchanger 1 and flows into the compressor 5 through the four-way valve 2; that is, in the cycle in which the first indoor heat exchanger 3 heats, part of the refrigerant flows into the second indoor heat exchanger 4, and the refrigeration function of the second indoor heat exchanger 4 is achieved, and the second indoor heat exchanger 4 may be a heat exchanger in a refrigerator.
The second indoor heat exchanger 4 is added, namely, the second indoor heat exchanger 4 is connected with the outdoor heat exchanger 1 in parallel, so that the flow distribution of the refrigerant is realized, and when the first indoor heat exchanger 3 works, the second indoor heat exchanger 4 works by utilizing the recovery of the cold or heat of the first indoor heat exchanger 3, so that the energy-saving effect is achieved.
In a further preferred embodiment, the first end pipeline of the second indoor heat exchanger 4 is sequentially connected with the second throttling device 43 and the three-way valve 44, and the pipeline of the three-way valve 44 is communicated with the pipeline between the second indoor heat exchanger 4 and the second throttling device 43;
the second end pipeline of the second indoor heat exchanger 4 is split into a first branch pipeline and a second branch pipeline, the pipeline of the first branch pipeline is communicated with the pipeline between the four-way valve 2 and the first indoor heat exchanger 1, and the pipeline of the second branch pipeline is communicated with the pipeline between the outdoor heat exchanger 1 and the four-way valve 2;
and a third valve 42 disposed on the first branch, the third valve 42 being configured to control a flow rate of the refrigerant flowing into or out of the branch of the second indoor heat exchanger 4 through the first branch.
The second valve 41 is disposed on the second branch, and the second valve 41 is used for controlling the flow rate of the refrigerant entering or exiting the branch of the second indoor heat exchanger 4 through the second branch.
The flow path of the refrigerant is changed and controlled by controlling the communication relation of the second valve 41, the third valve 42 and the three-way valve 44, so that the second indoor heat exchanger can independently perform refrigeration, heating and closing control, the requirements of different partitions of users on refrigeration and heating are met, and the cooling and heating combined supply is realized.
Preferably, the heat exchanger further comprises a first valve 11, which is arranged on a pipeline between the outdoor heat exchanger 1 and the four-way valve 2, and the first valve 11 is used for controlling the flow of the refrigerant into or out of the outdoor heat exchanger 1.
Preferably, the device further comprises a fourth valve 32, which is arranged on a pipeline between the first indoor heat exchanger 3 and the four-way valve 2, wherein the fourth valve 32 is used for controlling the flow of the refrigerant entering or exiting the first indoor heat exchanger 3;
a fifth valve 33 is provided in a line between the outdoor heat exchanger 1 and the first throttle device 31, and the fifth valve 33 controls a flow rate of the refrigerant into or out of the first throttle device 31.
The first valve 11, the second valve 41, the third valve 42, the fourth valve 32 and the fifth valve 33 are preferably electromagnetic valves, the four-way valve 2 is preferably an electromagnetic four-way valve, and the opening degree of the electromagnetic valve is adjusted, so that the flow rate of the refrigerant passing through each branch of the valve can be accurately adjusted, and the heat exchange effect of the heat exchanger of the system is better.
The application also provides a control method of the cooling and heating combined supply system, wherein the cooling or heating mode of the second indoor heat exchanger is changed by controlling the switch of the second valve or the third valve through the combined supply system according to any one of the embodiments.
The method specifically comprises the steps of disabling the second indoor heat exchanger, and controlling to close the second valve, the third valve and the three-way valve.
When the first indoor heat exchanger 3 is required to be deactivated and the second indoor heat exchanger 4 is required to be activated, the fourth valve 32, the fifth valve 33, and the second valve 41 are closed, the third valve 42 is opened, and the three-way valve 44 is adjusted to allow the refrigerant to flow in or out from the second throttling device 43, thereby realizing cooling or heating of the second indoor heat exchanger.
When the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are in a refrigerating or heating state, the third valve 42 is controlled to be opened, the second valve 41 is controlled to be closed, the three-way valve 44 is regulated to enable the refrigerant to flow in or flow out from the second throttling device 43, and the simultaneous refrigerating or simultaneous heating of the first indoor heat exchanger 3 and the second indoor heat exchanger 4 is realized;
in the same refrigeration mode, the opening of the fifth valve 33 is adjusted to adjust the flow rate of the refrigerant flowing into the first indoor heat exchanger 3, thereby controlling the heat exchange efficiency of the first indoor heat exchanger 3 and the second indoor heat exchanger 4.
In the same heating mode, the opening degree of the fourth valve 32 and/or the third valve 42 is adjusted, and the flow rate of the refrigerant flowing into the first indoor heat exchanger 3 and the second indoor heat exchanger 4 is adjusted, so that the heat exchange efficiency of the first indoor heat exchanger 3 and the second indoor heat exchanger 4 is controlled.
When the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are required to work and are different in state (the first indoor heat exchanger 3 is used for refrigerating, the second indoor heat exchanger 4 is used for heating, or the first indoor heat exchanger 3 is used for heating, the second indoor heat exchanger 4 is used for refrigerating), the heat exchange amount required by the first indoor heat exchanger 3 and the second indoor heat exchanger 4 changes along with the running time of the system, when the heat exchange amount of the first indoor heat exchanger 3 is larger than that of the second indoor heat exchanger 4, the outdoor heat exchanger 1 is required to perform auxiliary heat exchange, if the flow distribution of a branch circuit of the second indoor heat exchanger 4 and a branch circuit of the outdoor heat exchanger is unreasonable, the first indoor heat exchanger 3 is subjected to insufficient heat exchange, and in order to enable the heat exchange effect of the system to reach the optimal state, the refrigerant flow of the second indoor heat exchanger 4 and the outdoor heat exchanger 1 needs to be reasonably regulated. The present invention distributes the flow rate flowing through the branch of the second indoor heat exchanger 4 and the branch of the outdoor heat exchanger by adjusting the opening degrees of the first valve 11 and the second valve 41.
When the first indoor heat exchanger 3 and the second indoor heat exchanger 4 have the requirements of refrigeration and heating at the same time, the outdoor heat exchanger 1 plays a role of auxiliary heat exchange, in order to ensure that the system meets the heat exchange requirement of the indoor side and the heat exchange effect is optimal, when the heat exchange requirement of the second indoor heat exchanger 4 is smaller than the heat exchange requirement of the first indoor heat exchanger 3, the outdoor heat exchanger 1 needs to balance the heat exchange of the two, the first valve 11 is opened, the opening degree is determined by the heat exchange requirement of the second indoor heat exchanger 4, the larger the heat exchange requirement is, the larger the refrigerant flow passing through the second indoor heat exchanger 4 is, the larger the opening degree of the second valve 41 is, and the smaller the opening degree of the first valve 11 is; conversely, the second valve 41 has a small opening and the first valve 11 has a large opening. Therefore, the adjusting mode of the invention mainly uses the heat exchanging requirement of the second indoor heat exchanger 4 as the basis, and the flow control method is set, wherein the heat exchanging requirement is the difference between the set temperature and the inner side environment temperature, and the larger the difference is, the larger the heat exchanging requirement is, and the smaller the difference is, otherwise the smaller the heat exchanging requirement is.
The specific control method is as follows:
the control method further comprises a method for adjusting the heat exchange efficiency of the second indoor heat exchanger 4, and specifically comprises the following steps:
acquiring a set temperature T1 of the first indoor heat exchanger 3, a set temperature T2 of the second indoor heat exchanger 4, and an ambient temperature T1 of the current first indoor heat exchanger 3, and an ambient temperature T2 of the current second indoor heat exchanger 4;
calculating Δt1 and Δt2, wherein Δt1 is the difference between T1 and T1, and Δt2 is the difference between T2 and T2; i.e., Δt1= |t1-t1| and Δt2= |t2-t2|;
calculating a difference value t=deltat1-deltat2+T of heat exchange requirements of the indoor side heat exchanger, wherein T is a compensation temperature; if the heat exchange media of the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are different (for example, water and air), the enthalpy values of the heat exchange media are different, and a certain error exists in comparison with the heat exchange requirement between each partition by using the difference between the set temperature and the ambient temperature, so that the compensation temperature T is set, when the heat exchange media of each indoor partition are the same, T0 is set, if the heat exchange media are different, the setting value of T is set according to the difference of the heat exchange characteristic parameters (enthalpy value, flow and the like) of the heat exchange media, and the size of T is not fixed according to the actual conditions of each system.
Judging whether t is equal to or less than 0, if so, the first valve 11 is fully closed and the second valve 41 is fully opened; if not, the opening degrees of the first valve 11 and the second valve 41 are controlled according to the magnitude of Δt2. At T >0, the larger Δt2, the larger the opening of the second valve 41, and the smaller the opening of the first valve 11; conversely, the smaller Δt2 is, the smaller the opening of the second valve 41 is, and the larger the opening of the first valve 11 is.
Specifically, when t >0, the opening degrees of the first valve 11 and the second valve 41 are controlled as follows:
table 1 control of opening degree of solenoid valves 1 and 2
Note 1: a > B > C > D > 0;
and (2) injection: setting the opening value of the electromagnetic valve, wherein 0 represents full closing, 0.5 represents half opening and 1 represents full opening;
and (3) injection: x1 < X2 < X3., < 1;
and (4) injection: 1 > Y2 > Y3. > 0;
in order to avoid frequent adjustment of the opening degrees of the solenoid valves 1 and 2, it is necessary to recalculate Δt1, Δt2 after 4 minutes after the completion of the adjustment of the opening degree of the first valve 11 and/or the second valve 41.
On the basis of the preferred embodiment, the system has 8 working modes in total; arrows in fig. 1 to 8 indicate the refrigerant flow direction.
Mode one: the first indoor heat exchanger 3 is provided with a refrigerating mode, and the second indoor heat exchanger 4 is provided with a heating mode;
as shown in fig. 1, the third valve 42 is controlled to be closed, the first valve 11, the second valve 41, the fourth valve 32 and the fifth valve 33 are opened, and the three-way valve 44 is adjusted so that the refrigerant flowing out of the second indoor heat exchanger 4 does not pass through the second throttling device 43, thereby realizing the functions of cooling the first indoor heat exchanger 3 and heating the second indoor heat exchanger 4. In order to optimize the heat exchange effect of the second indoor heat exchanger 3, when the heat exchange requirement of the second indoor heat exchanger 4 changes, the opening of the first valve 11 and the second valve 41 can be controlled, so as to control the flow of the refrigerant passing through the second indoor heat exchanger 4, thereby achieving the purpose of energy distribution.
Mode two: the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are simultaneously provided with a heating mode;
as shown in fig. 2, the second valve 41 is controlled to be closed, the first valve 11, the third valve 42, the fourth valve 32 and the fifth valve 33 are opened, and the three-way valve 44 is adjusted to allow the refrigerant flowing out of the second indoor heat exchanger 4 to pass through the second throttling device 42, thereby realizing the function of simultaneously heating the first indoor heat exchanger 3 and the second indoor heat exchanger 4.
Mode three: the first indoor heat exchanger 3 does not work, and the second indoor heat exchanger 4 is provided with a heating mode;
as shown in fig. 3, the second valve 41, the fourth valve 32 and the fifth valve 33 are controlled to be closed, the first valve 11 and the third valve 42 are controlled to be opened, and the three-way valve 44 is regulated to enable the refrigerant flowing out of the second indoor heat exchanger 4 to pass through the throttling device 2 and the electromagnetic four-way valve to be reversed, so that the functions that the first indoor heat exchanger 3 does not work and the second indoor heat exchanger 4 heats are realized.
Mode four: the first indoor heat exchanger 3 is provided with a heating mode, and the second indoor heat exchanger 4 does not work;
as shown in fig. 4, the second valve 41 and the third valve 42 are controlled to be closed, the first valve 11, the fourth valve 32 and the fifth valve 33 are opened, and the electromagnetic four-way valve is reversed, so that the function that the first indoor heat exchanger 3 heats and the second indoor heat exchanger 4 does not work is realized.
Mode five: the first indoor heat exchanger 3 is set in a cooling mode, and the second indoor heat exchanger 4 is not operated.
As shown in fig. 5, the second valve 41 and the third valve 42 are controlled to be closed, and the first valve 11, the fourth valve 32 and the fifth valve 33 are controlled to be opened, so that the first indoor heat exchanger 3 is cooled, and the second indoor heat exchanger 4 is not operated.
Mode six: the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are simultaneously provided with a refrigeration mode;
as shown in fig. 6, by controlling the second valve 41 to be closed, the first valve 11, the third valve 42, the fourth valve 32 and the fifth valve 33 are opened, and then the refrigerant enters the second indoor heat exchanger 4 after being throttled by the second throttling device 43 by adjusting the three-way valve 44, thereby realizing the function of simultaneously refrigerating the first indoor heat exchanger 3 and the second indoor heat exchanger 4.
Mode seven: the indoor heat exchanger 1 is provided with a heating mode, and the indoor heat exchanger 2 is provided with a refrigerating mode;
as shown in fig. 7, by controlling the third valve 42 to be closed, the first valve 11, the second valve 41, the fourth valve 32 and the fifth valve 33 are opened, then the refrigerant directly enters the second indoor heat exchanger 4 without passing through the second throttling device 43 by adjusting the three-way valve 44, and the electromagnetic four-way valve is used for reversing, so that the functions of heating the first indoor heat exchanger 3 and refrigerating the second indoor heat exchanger 4 are realized, and in order to ensure that the heat exchange effect of the second indoor heat exchanger 4 is optimal, when the heat exchange requirement of the second indoor heat exchanger 4 changes, the opening of the first valve 11 and the opening of the second valve 41 can be controlled, the flow of the refrigerant passing through the second indoor heat exchanger 4 can be controlled, and the purpose of energy distribution can be achieved.
Mode eight: the first indoor heat exchanger 3 does not work, and the second indoor heat exchanger 4 is set in a refrigeration mode;
as shown in fig. 8, the second valve 41, the fourth valve 32 and the fifth valve 33 are controlled to be closed, the first valve 11 and the third valve 42 are controlled to be opened, and then the three-way valve 44 is regulated to throttle the refrigerant passing through the second throttling device 43 and then enter the second indoor heat exchanger 4, so that the function that the first indoor heat exchanger 3 does not work and the second indoor heat exchanger 4 refrigerates is realized.
The foregoing description of the preferred embodiment of the present invention is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The foregoing is merely a preferred embodiment of the present application and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the present application.
Claims (12)
1. The utility model provides a cold and warm allies oneself with supplies system which characterized in that: the device comprises an outdoor heat exchanger, a four-way valve, a first indoor heat exchanger and a first throttling device which are sequentially connected through pipelines, wherein the first throttling device is connected with the outdoor heat exchanger; the four-way valve is connected with the compressor;
at least one second indoor heat exchanger connected in parallel with the outdoor heat exchanger, wherein a first end pipeline of the second indoor heat exchanger is communicated with a pipeline between the outdoor heat exchanger and the first throttling device; and a second end pipeline of the second indoor heat exchanger is communicated with a pipeline between the outdoor heat exchanger and the four-way valve.
2. The co-feed system of claim 1, wherein: the first end pipeline of the second indoor heat exchanger is sequentially connected with a second throttling device and a three-way valve, and the pipeline of the three-way valve is communicated with the pipeline between the second indoor heat exchanger and the second throttling device;
the second end pipeline of the second indoor heat exchanger is split into a first branch pipeline and a second branch pipeline, the pipeline of the first branch pipeline is communicated with the pipeline between the four-way valve and the first indoor heat exchanger, and the pipeline of the second branch pipeline is communicated with the pipeline between the outdoor heat exchanger and the four-way valve;
the third valve is arranged on the first branch and is used for controlling the flow of the refrigerant entering or exiting the second indoor heat exchanger branch through the first branch.
3. The co-feed system of claim 2, wherein: the second valve is arranged on the second branch and is used for controlling the flow of the refrigerant entering or exiting the second indoor heat exchanger branch through the second branch.
4. A co-feed system according to any one of claims 1 to 3, comprising
The first valve is arranged on a pipeline between the outdoor heat exchanger and the four-way valve, and controls the flow of the refrigerant entering or exiting the outdoor heat exchanger.
5. The co-feed system of claim 4, wherein: also included is a method of manufacturing a semiconductor device,
the fourth valve is arranged on a pipeline between the first indoor heat exchanger and the four-way valve and is used for controlling the flow of the refrigerant entering or exiting the first indoor heat exchanger;
and a fifth valve arranged on a pipeline between the outdoor heat exchanger and the first throttling device, wherein the fifth valve controls the flow of the refrigerant entering or exiting the first throttling device.
6. A control method of a cooling and heating combined supply system is characterized by comprising the following steps of: controlling the mode of the first and second indoor heat exchangers by a co-feed system according to any one of claims 1-5.
7. The control method according to claim 6, characterized in that: the first end pipeline of the second indoor heat exchanger is sequentially connected with a second throttling device and a three-way valve, and the pipeline of the three-way valve is communicated with the pipeline between the second indoor heat exchanger and the second throttling device;
the second end pipeline of the second indoor heat exchanger is split into a first branch pipeline and a second branch pipeline, the pipeline of the first branch pipeline is communicated with the pipeline between the four-way valve and the first indoor heat exchanger, and the pipeline of the second branch pipeline is communicated with the pipeline between the outdoor heat exchanger and the four-way valve;
the third valve is arranged on the first branch and is used for controlling the flow of the refrigerant entering or exiting the second indoor heat exchanger branch through the first branch;
the second valve is arranged on the second branch and is used for controlling the flow of the refrigerant entering or exiting the second indoor heat exchanger branch through the second branch;
and when the first indoor heat exchanger is required to work and the second indoor heat exchanger is not required to work, the second valve and the third valve are controlled to be closed.
8. The control method according to claim 7, characterized in that: when the first indoor heat exchanger and the second indoor heat exchanger are required to be simultaneously cooled or heated, the second valve is controlled to be closed, the third valve is opened, and the three-way valve is regulated to enable the refrigerant to pass through the second throttling device.
9. The control method according to claim 8, characterized in that: when the first indoor heat exchanger and the second indoor heat exchanger refrigerate simultaneously, controlling and adjusting the opening of the fifth valve, and adjusting the flow of the refrigerant flowing into the first indoor heat exchanger;
when the first indoor heat exchanger and the second indoor heat exchanger are in a heating mode, controlling and adjusting the opening degree of the fourth valve and/or the third valve, and adjusting the flow rate of the refrigerant flowing into the first indoor heat exchanger and the second indoor heat exchanger.
10. The control method according to claim 7, characterized in that: the four-way valve is arranged on a pipeline between the first indoor heat exchanger and the four-way valve and is used for controlling the flow of the refrigerant entering or exiting the first indoor heat exchanger;
a fifth valve disposed on a line between the outdoor heat exchanger and the first throttling device, the fifth valve controlling a flow rate of the refrigerant into or out of the first throttling device;
when the second indoor heat exchanger works, the fourth valve, the fifth valve and the second valve are controlled to be closed, the third valve is opened, the three-way valve is regulated to enable the refrigerant to flow in or flow out from the second throttling device, and refrigeration or heating of the second indoor heat exchanger is achieved.
11. The control method according to claim 10, comprising a first valve provided on a line between the outdoor heat exchanger and the four-way valve, the first valve controlling a flow rate of refrigerant into or out of the outdoor heat exchanger;
when the first indoor heat exchanger and the second indoor heat exchanger work and are different in state, the control method further comprises a method for adjusting the heat exchange efficiency of the second indoor heat exchanger, and the method specifically comprises the following steps:
acquiring a set temperature T1 of the first indoor heat exchanger, a set temperature T2 of the second indoor heat exchanger and an environment temperature T1 of the first indoor heat exchanger, and an environment temperature T2 of the second indoor heat exchanger;
calculating Δt1 and Δt2, wherein Δt1 is the difference between T1 and T1, and Δt2 is the difference between T2 and T2;
calculating a difference value t=deltat1-deltat2+T of heat exchange requirements of the indoor side heat exchanger, wherein T is a compensation temperature;
judging whether t is less than or equal to 0, if so, completely closing the first valve and completely opening the second valve; if not, the opening degrees of the first valve 1 and the second valve 2 are controlled according to the magnitude of Δt2.
12. The control method according to claim 11, characterized in that it takes 4 minutes after the adjustment of the opening degree of the first valve and/or the second valve is completed, and then Δt1, Δt2 are recalculated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310177176.3A CN116358182A (en) | 2023-02-28 | 2023-02-28 | Cold and warm combined supply system and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310177176.3A CN116358182A (en) | 2023-02-28 | 2023-02-28 | Cold and warm combined supply system and control method |
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