CN217715178U - Heat exchange loop and air conditioner - Google Patents
Heat exchange loop and air conditioner Download PDFInfo
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- CN217715178U CN217715178U CN202221497989.8U CN202221497989U CN217715178U CN 217715178 U CN217715178 U CN 217715178U CN 202221497989 U CN202221497989 U CN 202221497989U CN 217715178 U CN217715178 U CN 217715178U
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Abstract
The utility model discloses a heat transfer circuit and air conditioner, wherein, heat transfer circuit is used for connecting trachea and liquid pipe, heat transfer circuit includes: the heat exchanger group comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is connected with the gas pipe, and the second heat exchanger is respectively connected with the gas pipe and the liquid pipe; the first heat exchanger is connected with the second heat exchanger through the control valve group; the heat exchange loop has a refrigeration mode and a heating mode, and in the refrigeration mode, the control valve group controls the first heat exchanger and the second heat exchanger to be connected between the air pipe and the liquid pipe in series; and in the heating mode, the control valve group controls the first heat exchanger and the second heat exchanger to be connected between the air pipe and the liquid pipe in parallel. The utility model discloses when realizing improving the refrigeration effect under the refrigeration mode, avoid heating the damage that causes the pipeline under the mode.
Description
Technical Field
The utility model relates to an air conditioner field, in particular to heat transfer circuit and air conditioner.
Background
The existing air conditioner condenser has the same heat exchange flow path design for refrigeration and heating, and heating only needs to flow reversely according to the refrigeration flow path. But the refrigeration and heating have different requirements on the supercooling degree, and the proper condensation supercooling degree is beneficial to improving the refrigeration performance of the air conditioner but is not beneficial to heating.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a heat transfer circuit, aim at solving current heat transfer circuit and in refrigeration and heating the same and influence the problem of equipment performance of super-cooled rate.
In order to achieve the above object, the utility model provides a heat transfer circuit for connect trachea and liquid pipe, heat transfer circuit includes:
the heat exchanger group comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is connected with the gas pipe, and the second heat exchanger is respectively connected with the gas pipe and the liquid pipe;
the first heat exchanger is connected with the second heat exchanger through the control valve group;
the heat exchange loop has a refrigeration mode and a heating mode, and in the refrigeration mode, the control valve group controls the first heat exchanger and the second heat exchanger to be connected between the air pipe and the liquid pipe in series; and under the heating mode, the control valve group controls the first heat exchanger and the second heat exchanger to be connected between the air pipe and the liquid pipe in parallel.
In some examples, the control valve set includes a flow divider and a control valve, the first heat exchanger being piped to the gas pipe and the flow divider, respectively; the flow divider is connected with an inlet of the second heat exchanger through a pipeline;
the control valve comprises a first valve body, a second valve body and a third valve body; the flow divider is also connected with the liquid pipe through a pipeline provided with the first valve body; the outlet of the second heat exchanger is connected with the liquid pipe through a pipeline provided with the second valve body, and the outlet of the second heat exchanger is also connected with the air pipe through a pipeline provided with the third valve body;
in the refrigeration mode, the first valve body and the third valve body are closed, and the second valve body is opened; in the heating mode, the first valve body and the third valve body are opened, and the second valve body is closed.
In some examples, the heat exchanger group further comprises a third heat exchanger, and the third heat exchanger is respectively connected with the gas pipe and the flow divider through pipelines.
In some examples, the third valve body is equal in volume to the second valve body.
In some examples, the third valve body is provided with a flash tank for storing a refrigerant.
In some examples, the containment device is a reservoir fixedly connected to the outlet of the third valve body.
In some examples, the expansion device is an expansion pipe fixedly connected to the outlet of the third valve body, and an inner diameter of the expansion pipe is larger than a drift diameter of the third valve body.
In some examples, the second valve body is provided with a capacity expansion device, and the capacity expansion device is used for storing a refrigerant.
In some examples, the containment device is a reservoir fixedly connected to the outlet of the second valve body.
In some examples, the expansion device is a flash tube fixedly connected to the outlet of the second valve body, and an inner diameter of the flash tube is larger than a diameter of the second valve body.
In some examples, the volume of the third valve body is greater than the volume of the second valve body.
In some examples, the heat exchange loop is configured to convey a refrigerant; the volume of the third valve body is V3The saturation density of the refrigerant is rho, V3＝05 × (Mh-Mc)/ρ, wherein Mc is a refrigerant charge amount required by the heat exchange circuit in the cooling mode, and Mh is a refrigerant charge amount required by the heat exchange circuit in the heating mode.
In some examples, the volume of the second valve body is greater than the volume of the third valve body.
In some examples, the heat exchange loop is configured to convey a refrigerant; the volume of the second valve body is V2The saturation density of the refrigerant is rho, V2And =0.5 × (Mc-Mh)/ρ, wherein Mc is a refrigerant charge amount required by the heat exchange circuit in the cooling mode, and Mh is a refrigerant charge amount required by the heat exchange circuit in the heating mode.
In some examples, the first valve body, the second valve body, and the third valve body are solenoid valves or one-way valves.
The utility model discloses on the basis of above-mentioned heat transfer circuit, still provide an air conditioner, reach as any one in the above-mentioned example including the air conditioning indoor set heat transfer circuit, the trachea with the liquid pipe respectively with the air conditioning indoor set is connected.
The technical scheme of the utility model is that the connection state of the first heat exchanger and the second heat exchanger is controlled by the control valve group, when the heat exchange loop is in the refrigeration mode, the control valve group controls the first heat exchanger and the second heat exchanger to be connected in series between the air pipe and the liquid pipe, and then the refrigerant is enabled to sequentially pass through the first heat exchanger and the second heat exchanger for heat exchange; when the heat exchange loop is in the heating mode, the refrigerant is enabled to respectively exchange heat through the first heat exchanger and the second heat exchanger, so that heat exchange flow paths of the refrigerant in the refrigerating mode and the heating mode are different, the supercooling degree of the refrigerant is different, the refrigerating effect in the refrigerating mode is improved, and meanwhile, the pipeline is prevented from being damaged in the heating mode.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic pipeline diagram of an embodiment of the heat exchange circuit of the present invention;
fig. 2 is a schematic pipeline diagram of the heat exchange circuit in the refrigeration mode according to the embodiment of the present invention;
fig. 3 is a schematic view of the pipeline of the heat exchange loop according to the next embodiment of the present invention.
The reference numbers indicate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Trachea | 20 | Liquid tube |
| 30 | First heat exchanger | 31 | |
| 40 | |
41 | The second branch |
| 50 | Third heat exchanger | 51 | |
| 60 | First valve body | 70 | |
| 80 | |
90 | Flow divider |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; \8230;) are provided in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
An embodiment of the utility model provides a heat transfer return circuit for connect trachea 10 and liquid pipe 20, trachea 10 and liquid pipe 20 are used for carrying the refrigerant. The heat exchange loop can be used for split air conditioners, integrated air conditioners, window air conditioners, multi-split air conditioners, heat pump units, water systems and other forms of refrigerating and heating units. Taking a split air conditioner as an example, the heat exchange loop is connected to an outdoor unit of the air conditioner, and the air pipe 10 and the liquid pipe 20 are used for connecting an indoor unit of the air conditioner and form a refrigerant circulation loop with a heat exchanger of the indoor unit of the air conditioner. When the air conditioner is in a refrigeration mode, a refrigerant enters a heat exchange loop through the air pipe 10 and is output to a heat exchanger of an indoor unit through the liquid pipe 20 to refrigerate the indoor unit, and then is conveyed to the air pipe 10 to be circulated again; when the air conditioner is in a heating mode, the refrigerant enters the heat exchange loop through the liquid pipe 20, is output to a heat exchanger of an indoor unit through the air pipe 10 to heat the indoor unit, and is then conveyed to the liquid pipe 20 to be circulated again.
Referring to fig. 1, in some examples, the heat exchange loop includes a heat exchanger group and a control valve group, the heat exchanger group includes a first heat exchanger 30 and a second heat exchanger 40, the first heat exchanger 30 is connected to the gas pipe 10, the second heat exchanger 40 is further connected to the liquid pipe 20, and the first heat exchanger 30 is connected to the second heat exchanger 40 through the control valve group, so that the control valve group can be used to control a connection manner of the first heat exchanger 30 and the second heat exchanger 40.
Referring to fig. 2, the heat exchange loop has a cooling mode and a heating mode, in the cooling mode, the control valve set controls the first heat exchanger 30 and the second heat exchanger 40 to be connected in series between the air pipe 10 and the liquid pipe 20, the refrigerant enters the first heat exchanger 30 through the air pipe 10 and then enters the second heat exchanger 40, the second heat exchanger 40 serves as a supercooling heat exchanger, and the refrigerant supercooled by the second heat exchanger 40 enters the liquid pipe 20. The refrigerant enters the heat exchanger of the indoor unit of the air conditioner through the liquid pipe 20, cools the room, enters the liquid pipe 20, and then enters the cycle again.
Referring to fig. 3, in the heating mode, the control valve set controls the first heat exchanger 30 and the second heat exchanger 40 to be connected in parallel between the air pipe 10 and the liquid pipe 20, the refrigerant enters the heat exchange loop through the liquid pipe 20, a part of the refrigerant enters the air pipe 10 after passing through the first heat exchanger 30 for heat exchange, a part of the refrigerant enters the air pipe 10 after passing through the second heat exchanger 40 for heat exchange, the refrigerant is not supercooled in the heat exchange loop any more, and the refrigerant enters the heat exchanger of the indoor unit of the air conditioner through the air pipe 10 to heat the indoor space.
Because under the refrigeration mode, the refrigerant loops through first heat exchanger 30 and second heat exchanger 40 and inputs to liquid pipe 20 again after the heat transfer, because the pipeline of second heat exchanger 40 can regard as the subcooling flow path, and then can promote the super-cooled degree of refrigerant, and then promote refrigeration effect. In the heating mode, a supercooling flow path does not exist in the heat exchange loop, the refrigerant enters the air pipe 10 after being subjected to heat exchange through the first heat exchanger 30 and the second heat exchanger 40 respectively, and the supercooling degree of the heat exchange loop is lower than that in the cooling mode, so that adverse effects on the air conditioner can be avoided. The connection state of the first heat exchanger 30 and the second heat exchanger 40 is controlled by the control valve group, so that the heat exchange loop can have better refrigeration performance during refrigeration, and adverse effects on the heat exchange loop are not easily caused due to no supercooling during heating, and the use performance of the heat exchange loop is effectively improved.
Through the connection state of effective control first heat exchanger 30 and second heat exchanger 40, the refrigerant flow path is different under refrigeration and heating mode, and the refrigerant no longer carries out the subcooling under the heating mode, can improve the seasonal efficiency APF (Annual performance factor) of air conditioner and improve user's thermal comfort.
In some examples, the control valve assembly may be a combination of multiple valve bodies, such as a combination of a check valve and a solenoid valve. The control circuit of the control valve group can be integrated outside the heat exchange loop, and can also be integrated in an air conditioner external unit or an air conditioner internal unit of the air conditioner. The control of the operation state of the control valve group can be realized by adopting the existing control circuit and control program.
In some examples, the first heat exchanger 30 is connected to the gas pipe 10 through a pipeline, and for convenience of description, the pipeline connecting the first heat exchanger 30 to the gas pipe 10 is hereinafter referred to as a first branch 31. The second heat exchanger 40 is connected to the gas pipe 10 through a pipe, and the second heat exchanger 40 is connected to the liquid pipe 20 through a pipe. In some examples, the first heat exchanger 30 and the second heat exchanger 40 are two heat exchangers that are disposed independently of each other. In some examples, a plurality of heat exchange fins are combined according to a preset rule to form a fin group, for example, a plurality of fins are arranged in parallel to form a fin group, and the first heat exchanger 30 and the second heat exchanger 40 are both integrated on the fin group, wherein the tubes of the first heat exchanger 30 are distributed along a first track in the fin group, the tubes of the second heat exchanger 40 are distributed along a second track in the fin group, and the first track and the second track are staggered from each other to form two groups of heat exchange passages in the same fin group. In some examples, the piping used to connect the devices in the heat exchange circuit is piping that is external to the devices. In some examples, the tubing used to connect the devices is tubing that is mounted to the devices themselves.
In some examples, the heat exchanger set includes a first heat exchanger 30 and a second heat exchanger 40, and the first heat exchanger 30 is connected to the gas pipe 10 through a first branch 31. The control valve set comprises a flow divider 90 and a control valve, wherein the flow divider 90 is used for dividing and depressurizing the refrigerant output by the first heat exchanger 30 so as to output the refrigerant in a low-pressure state. The first heat exchanger 30 is connected to the flow divider 90 by a pipeline, and the second heat exchanger 40 is connected to the flow divider 90 by a pipeline, and for convenience of description, the pipeline between the second heat exchanger 40 and the flow divider 90 is hereinafter referred to as a second branch 41. In the cooling mode, the refrigerant in the air tube 10 enters the first heat exchanger 30 through the first branch 31, the refrigerant after heat exchange enters the flow divider 90 through a pipeline, and the refrigerant in the flow divider 90 enters the second heat exchanger 40 through the second branch 41. The control valve comprises a first valve body 60, a second valve body 70 and a third valve body 80, wherein the flow divider 90 is also connected with the liquid pipe 20 through a pipeline provided with the first valve body 60; the second heat exchanger 40 has an inlet and an outlet, the second branch 41 is connected to the inlet of the second heat exchanger 40, the outlet of the second heat exchanger 40 is connected to the liquid pipe 20 through a pipe provided with a second valve body 70, and the outlet of the second heat exchanger 40 is further connected to the gas pipe 10 through a pipe provided with a third valve body 80. The control of the pipeline is realized by controlling the opening and closing states of the first valve body 60, the second valve body 70 and the third valve body 80, and further the control of the refrigerant can be realized.
In the cooling mode, the first and third valve elements 60 and 80 are closed, and the second valve element 70 is opened. Refrigerant in the air pipe 10 enters the first heat exchanger 30 through the first branch line 31, and enters the flow divider 90 through a pipeline after heat exchange of the refrigerant in the first heat exchanger 30; the refrigerant in the flow divider 90 enters the second heat exchanger 40 through the second branch 41, exchanges heat with the second heat exchanger 40, and then reaches the liquid pipe 20 through a pipeline provided with the second valve body 70. The liquid pipe 20 is connected to a heat exchanger of the indoor unit of the air conditioner, and the refrigerant after heat exchange of the indoor unit of the air conditioner enters the air pipe 10 to enter the circulation again.
In the heating mode, the first valve element 60 and the third valve element 80 are opened, and the second valve element 70 is closed. The refrigerant in the liquid pipe 20 enters the flow divider 90 through the pipeline provided with the first valve 60, part of the refrigerant enters the first heat exchanger 30 through the pipeline for heat exchange and then enters the gas pipe 10 through the first branch 31, part of the refrigerant enters the second heat exchanger 40 through the second branch 41, and the refrigerant after heat exchange enters the gas pipe 10 through the pipeline provided with the third valve 80.
In some examples, the first valve body 60, the second valve body 70, and the third valve body 80 are solenoid valves, and control modules of the first valve body 60, the second valve body 70, and the third valve body 80 may be integrated on an air conditioner and controlled by a control component such as an air conditioner remote controller.
In some examples, the first, second and third valve bodies 60, 70, 80 are one-way valves, the liquid tube 20 is piped to the inlet end of the first valve body 60, and the outlet end of the first valve body 60 is piped to the flow splitter 90; the outlet of the second heat exchanger 40 is connected with the inlet end of a second valve body 70 through a pipeline, and the outlet end of the second valve body 70 is connected with a liquid pipe 20; the outlet of the second heat exchanger 40 is also connected to the inlet end of the third valve body 80 through a pipeline, and the outlet end of the third valve body 80 is connected to the air pipe 10 through a pipeline.
Referring to fig. 1, 2 and 3, in some examples, the control valve set includes the flow divider 90 and the control valve described in the previous examples, the heat exchanger set further includes a third heat exchanger 50, the third heat exchanger 50 is connected to the gas pipe 10 through a pipeline, for convenience of description, the pipeline connecting the third heat exchanger 50 and the gas pipe 10 is referred to as a third branch 51, and the third heat exchanger 50 is further connected to the flow divider 90 through a pipeline. The third heat exchanger 50 is disposed in parallel with the second heat exchanger 40.
In the cooling mode, part of the refrigerant in the air tube 10 enters the first heat exchanger 30 through the first branch 31, enters the flow divider 90 after exchanging heat in the first heat exchanger 30, and enters the liquid inlet tube 20 through the pipeline provided with the second valve body 70 after entering the second heat exchanger 40 through the second branch 41 for exchanging heat. Part of the refrigerant enters the third heat exchanger 50 through the third branch 51, after heat exchange is performed by the third heat exchanger 50, the refrigerant enters the flow divider 90 through the pipeline, and the refrigerant in the flow divider 90 enters the second heat exchanger 40 through the second branch 41 and enters the liquid inlet pipe 20 through the pipeline provided with the second valve body 70.
In the heating mode, the refrigerant in the liquid pipe 20 enters the flow divider 90 through the pipeline provided with the first valve body 60, the refrigerant in the flow divider 90 is divided into three parts, one part of the refrigerant enters the first heat exchanger 30 through the pipeline, and after heat exchange is carried out by the first heat exchanger 30, the refrigerant enters the gas pipe 10 through the first branch 31; after entering the second heat exchanger 40 for heat exchange through the second branch 41, the other part of the refrigerant enters the air pipe 10 through the pipeline provided with the third valve body 80; and another part of the refrigerant enters the third heat exchanger 50 through a pipeline, exchanges heat with the third heat exchanger 50, and then enters the air pipe 10 through the third branch 51.
Through setting up third heat exchanger 50, can realize the refrigerant subcooling simultaneously, under the certain prerequisite of the volume of filling of refrigerant, can compromise refrigeration and heat, improve heat transfer circuit's suitability, shorten the flow path of refrigerant, and then reduce the pressure loss among the refrigerant transportation process.
In some examples, the third heat exchanger 50 is a heat exchanger disposed in parallel with the first and second heat exchangers 30, 40. In some examples, a plurality of heat exchange fins are combined according to a preset rule to form a fin group, for example, a plurality of fins are arranged in parallel to form a fin group, and the first heat exchanger 30, the second heat exchanger 40 and the third heat exchanger 50 are all integrated on the fin group, wherein the tubes of the first heat exchanger 30 are distributed along a first track in the fin group, the tubes of the second heat exchanger 40 are distributed along a second track in the fin group, the tubes of the third heat exchanger 50 are distributed along a third track in the fin group, and the first track, the second track and the third track are staggered from each other to form two groups of heat exchange passages in the same fin group.
In some examples, the volumes of the first valve body 60, the second valve body 70, and the third valve body 80 are equal, wherein the volumes are positively correlated to the length and the pipe diameter of the valve bodies, and the volumes of the first valve body 60, the second valve body 70, and the third valve body 80 can be calculated with reference to the prior art.
In some examples, the second valve body 70 and the third valve body 80 are equal in volume. When the refrigerant charge amount required in the heat exchange circuit in the cooling mode is smaller than the refrigerant charge amount required in the heat exchange circuit in the heating mode, the third valve body 80 is provided with a capacity expansion device for storing the refrigerant. Under the refrigeration mode, the flash tank can be used for the surplus refrigerant of storage. In the heating mode, redundant refrigerants can enter a heating cycle, and then can be stored in the heating mode, so that the refrigerant charging amount can give consideration to both cooling and heating. Further, in some examples, the expansion device is a reservoir fixedly connected to the outlet of the third valve 80, and the reservoir has a cavity therein for storing the cooling medium. In some examples, the expansion device is a expansion pipe fixedly connected to an outlet of the third valve 80, the outlet of the third valve 80 is connected to a pipeline connected to the air pipe 10 through the expansion pipe, and an inner diameter of the expansion pipe is greater than a nominal Diameter (DN) of the third valve 80 for storing the refrigerant.
In some examples, the second valve body 70 and the third valve body 80 are equal in volume. When the refrigerant charge amount required in the heat exchange circuit in the cooling mode is greater than the refrigerant charge amount required in the heat exchange circuit in the heating mode, the second valve body 70 is provided with a capacity expansion device for storing the refrigerant. In the heating mode, the expansion device may be configured to store excess refrigerant. In the refrigeration mode, redundant refrigerants can enter the refrigeration cycle, and then can be stored in the refrigeration mode, so that the refrigerant filling amount can take refrigeration and heating into consideration. Further, in some examples, the expansion device is an accumulator fixedly connected to the outlet of the second valve body 70, and the accumulator has a cavity therein for storing the refrigerant. In some examples, the expansion device is a expansion pipe fixedly connected to the outlet of the second valve body 70, the outlet of the second valve body 70 is connected to the pipeline connected to the air pipe 10 through the expansion pipe, and the inner diameter of the expansion pipe is larger than the diameter of the second valve body 70 for storing the refrigerant.
In some examples, the second valve body 70 and the third valve body 80 are not equal in volume, and the third valve body 80 is larger in volume than the second valve body 70. When the refrigerant charge amount required in the heat exchange circuit in the cooling mode is smaller than the refrigerant charge amount required in the heat exchange circuit in the heating mode, the third valve body 80 may serve as a capacity expansion device for storing redundant refrigerant in the cooling mode, and in the heating mode, the redundant refrigerant may enter a heating cycle, so that both cooling and heating may be performed by the refrigerant charge amount.
In some examples, the volumes of the second valve body 70 and the third valve body 80 are not equal, and the volume of the third valve body 80 is greater than the volume of the second valve body 70. The volume of the third valve 80 has the following relationship with the saturation density of the refrigerant:
V3＝0.5×(Mh-Mc)/ρ
wherein: v3The volume of the third valve 80, ρ is the saturation density of the refrigerant, mc is the refrigerant charge required by the heat exchange circuit in the cooling mode, and Mh is the heating of the heat exchange circuitThe required refrigerant charge in the mode.
When the refrigerant charge amount required in the heat exchange loop in the cooling mode is smaller than the refrigerant charge amount required in the heat exchange loop in the heating mode, the volume of the third valve 80 is made larger than the volume of the second valve 70, and the volume of the third valve 80 is controlled according to the above formula, so that the amount of the refrigerant stored in the third valve 80 in the cooling mode can be conveniently and accurately controlled, and further the amount of the refrigerant charged in the heat exchange loop can be simultaneously used for cooling and heating.
In some examples, the volumes of the second valve body 70 and the third valve body 80 are not equal, and the volume of the second valve body 70 is greater than the volume of the third valve body 80. When the refrigerant charge amount required in the heat exchange circuit in the cooling mode is greater than the refrigerant charge amount required in the heat exchange circuit in the heating mode, the second valve body 70 may serve as a capacity expansion device for storing redundant refrigerant in the heating mode, and the redundant refrigerant enters the refrigeration cycle in the cooling mode, so that the refrigerant charge amount can be considered for both cooling and heating.
In some examples, the second valve body 70 and the third valve body 80 are not equal in volume, and the second valve body 70 is larger in volume than the third valve body 80. The volume of the second valve body 70 and the saturation density of the refrigerant have the following relationship:
V2＝0.5×(Mc-Mh)/ρ
wherein: v2ρ is the volume of the second valve body 70, the saturation density of the refrigerant, mc is the refrigerant charge required by the heat exchange circuit in the cooling mode, and Mh is the refrigerant charge required by the heat exchange circuit in the heating mode.
When the refrigerant charge amount required in the heat exchange circuit in the cooling mode is greater than the refrigerant charge amount required in the heat exchange circuit in the heating mode, the volume of the second valve body 70 is greater than the volume of the third valve body 80, and the volume of the second valve body 70 is controlled according to the above formula, so that the amount of refrigerant stored in the second valve body 70 in the heating mode can be conveniently and accurately controlled, and further the amount of refrigerant charged in the heat exchange circuit can be simultaneously taken into consideration for cooling and heating.
The utility model also provides an air conditioner, reach as above-mentioned arbitrary example including the air conditioning in the machine heat transfer circuit. Wherein, the air pipe 10 and the liquid pipe 20 of the heat exchange loop are respectively connected with the indoor unit of the air conditioner. The utility model discloses an air conditioner is based on the example of above-mentioned heat transfer circuit, consequently, the utility model discloses the example of air conditioner includes the technical scheme in the whole examples of above-mentioned heat transfer circuit, and the technological effect that reaches is also identical, no longer gives unnecessary details here. By adopting the heat exchange loop, under the refrigeration and heating modes, the flow paths of the refrigerant in the heat exchanger are different, the supercooling degree requirement under the refrigeration and heating modes can be considered, the air conditioner has a better refrigeration effect, and meanwhile, the pipeline cannot be damaged under the heating mode, so that the seasonal energy efficiency APF is improved, and the thermal comfort of a user is improved.
The above is only the optional embodiment of the present invention, and not therefore the limit to the patent scope of the present invention, all the technical ideas of the present invention are utilized, the equivalent structure transformation made by the contents of the specification and the drawings, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (16)
1. A heat exchange circuit for connecting a gas pipe and a liquid pipe, the heat exchange circuit comprising:
the heat exchanger group comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is connected with the gas pipe, and the second heat exchanger is respectively connected with the gas pipe and the liquid pipe;
the first heat exchanger is connected with the second heat exchanger through the control valve group;
the heat exchange loop has a refrigeration mode and a heating mode, and in the refrigeration mode, the control valve group controls the first heat exchanger and the second heat exchanger to be connected between the air pipe and the liquid pipe in series; and under the heating mode, the control valve group controls the first heat exchanger and the second heat exchanger to be connected between the air pipe and the liquid pipe in parallel.
2. A heat exchange circuit according to claim 1,
the control valve group comprises a flow divider and a control valve, and the first heat exchanger is respectively connected with the air pipe and the flow divider through pipelines; the flow divider is connected with an inlet of the second heat exchanger through a pipeline;
the control valve comprises a first valve body, a second valve body and a third valve body; the flow divider is also connected with the liquid pipe through a pipeline provided with the first valve body; the outlet of the second heat exchanger is connected with the liquid pipe through a pipeline provided with the second valve body, and the outlet of the second heat exchanger is also connected with the air pipe through a pipeline provided with the third valve body;
in the refrigeration mode, the first valve body and the third valve body are closed, and the second valve body is opened; in the heating mode, the first valve body and the third valve body are opened, and the second valve body is closed.
3. The heat exchange circuit of claim 2 wherein the heat exchanger set further comprises a third heat exchanger, the third heat exchanger being connected to the gas pipe and the flow divider by a pipe, respectively.
4. A heat exchange circuit according to claim 2 or 3, wherein the third valve body and the second valve body have the same volume.
5. The heat exchange circuit of claim 4 wherein the third valve body has a flash tank for storing a refrigerant.
6. A heat exchange circuit according to claim 5 wherein the expansion means is a reservoir fixedly connected to the outlet of the third valve body.
7. The heat exchange circuit of claim 5 wherein the expansion device is an expansion tube fixedly connected to the outlet of the third valve body, the expansion tube having an inner diameter greater than the diameter of the third valve body.
8. The heat exchange circuit of claim 4 wherein the second valve body has an expansion device for storing a refrigerant.
9. A heat exchange circuit according to claim 8, wherein the volume expansion means is a reservoir fixedly connected to the outlet of the second valve body.
10. The heat exchange circuit of claim 8 wherein the expansion device is a flash tube fixedly connected to the outlet of the second valve body, the flash tube having an inner diameter greater than the diameter of the second valve body.
11. A heat exchange circuit according to claim 2 or 3, wherein the volume of the third valve body is larger than the volume of the second valve body.
12. The heat exchange circuit of claim 11, wherein the heat exchange circuit is configured to convey a refrigerant; the volume of the third valve body is V3The saturation density of the refrigerant is rho, V3And =0.5 × (Mh-Mc)/ρ, where Mc is a refrigerant charge amount required by the heat exchange circuit in the cooling mode, and Mh is a refrigerant charge amount required by the heat exchange circuit in the heating mode.
13. A heat exchange circuit according to claim 2 or 3, wherein the volume of the second valve body is larger than the volume of the third valve body.
14. The heat exchange circuit of claim 13, wherein the heat exchange circuit is configured to convey a refrigerant; the volume of the second valve body is V2The saturation density of the refrigerant is rho, V2=0.5 × (Mc-Mh)/ρ, where Mc is the heat exchange loop in the refrigeration modeAnd the Mh is the refrigerant charge amount required by the heat exchange loop in the heating mode.
15. A heat exchange circuit according to claim 2 or 3, wherein the first valve body, the second valve body and the third valve body are solenoid valves or check valves.
16. An air conditioner, characterized in that, comprising an air conditioner indoor unit and the heat exchange loop of any one of claims 1 to 15, the air pipe and the liquid pipe are respectively connected with the air conditioner indoor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221497989.8U CN217715178U (en) | 2022-06-15 | 2022-06-15 | Heat exchange loop and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221497989.8U CN217715178U (en) | 2022-06-15 | 2022-06-15 | Heat exchange loop and air conditioner |
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| Publication Number | Publication Date |
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| CN217715178U true CN217715178U (en) | 2022-11-01 |
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| CN202221497989.8U Active CN217715178U (en) | 2022-06-15 | 2022-06-15 | Heat exchange loop and air conditioner |
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| CN (1) | CN217715178U (en) |
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