CN219036903U

CN219036903U - Heat exchange and outdoor unit with wide capacity control

Info

Publication number: CN219036903U
Application number: CN202223001688.4U
Authority: CN
Inventors: 林茂山; 五十住晋一; 相金波
Original assignee: Mitsubishi Heavy Industries Haier Qingdao Air Conditioners Co Ltd
Current assignee: Mitsubishi Heavy Industries Haier Qingdao Air Conditioners Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-05-16
Anticipated expiration: 2032-11-11

Abstract

The utility model provides a heat exchange and outdoor unit with wide capacity control, which is divided into an upper half heat exchange and a lower half heat exchange, wherein the upper half heat exchange and the lower half heat exchange respectively comprise a distributor assembly, an electronic expansion valve assembly, a plurality of heat exchange pipelines connected with the distributor assembly and a plurality of fins connected with the heat exchange pipelines. The outdoor unit comprises a compressor, a gas-liquid separator, an oil return pipeline, a four-way valve, a one-way valve, a liquid storage device, a throttling device, a first operation valve and a second operation valve, wherein the four-way valve is connected with the first operation valve, the gas-liquid separator and the heat exchange with wide capacity control, and the liquid storage device, the throttling device and the second operation valve are sequentially connected with the heat exchange with wide capacity control. The heat exchange capacity can be adjusted, the heat exchange capacity is reasonably utilized, the uniformity of split flow can be better optimized, and the use efficiency of heat exchange is improved; in addition, the running stability, the reliability and the energy conservation of the system can be improved.

Description

Heat exchange and outdoor unit with wide capacity control

Technical Field

The utility model relates to the technical field of air conditioners, in particular to a heat exchange and outdoor unit with wide capacity control.

Background

For multi-split air conditioner, most of outdoor heat exchange of the existing air conditioner is divided by a distributor, under the working condition of heating, the heat exchange capacity cannot be utilized in a segmented mode, under the working condition of high-temperature heating (the outdoor environment temperature is more than 15 ℃), especially when the indoor unit is small in starting capacity and the outdoor unit is large in capacity, even if the frequency of a press is reduced to the minimum frequency of the press, the outdoor fan is in a stopped state, high-temperature heating and high-pressure failure can often occur, and the whole unit is stopped based on the consideration of the reliability of the press and the safety of a system, so that the use effect of a user can be influenced.

Disclosure of Invention

In order to solve the above problems in the prior art, the present utility model provides a heat exchanger and an outdoor unit with wide capacity control.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the aim of the utility model can be achieved by the following technical scheme: the utility model provides a heat exchange with wide capacity control, includes the shell, the heat exchange divide into first half heat exchange and second half heat exchange, first half heat exchange and second half heat exchange respectively include distributor assembly, electronic expansion valve assembly, with a plurality of heat transfer pipeline that the distributor assembly is connected, with a plurality of fins that the heat transfer pipeline is connected, the distributor assembly is connected the heat transfer pipeline, heat transfer pipeline external connection fin, heat transfer pipeline and fin set up inside the shell, the heat transfer area of first half heat exchange and the heat transfer area of second half heat exchange are 1:2.

Preferably, the cross section of the shell is in a G shape.

Preferably, the electronic expansion valve assembly comprises a solenoid expansion valve and a check valve connected in parallel.

The utility model also provides an outdoor unit adopting the heat exchange with the wide capacity control, which comprises a compressor, a gas-liquid separator, an oil return pipeline, a four-way valve, a one-way valve, a liquid reservoir, a throttling device, a first operation valve and a second operation valve, wherein the compressor is respectively connected with the oil separator, the oil return pipeline and the gas-liquid separator, the oil separator is connected with the one-way valve and the oil return pipeline, the one-way valve is connected with the four-way valve, the four-way valve is also connected with the first operation valve, the gas-liquid separator and the heat exchange with the wide capacity control, and the heat exchange with the wide capacity control is sequentially connected with the liquid reservoir, the throttling device and the second operation valve, and the throttling device is also connected with a pipeline between the four-way valve and the gas-liquid separator.

Preferably, the oil return pipeline comprises an electromagnetic valve, a first capillary tube and a second capillary tube, and the electromagnetic valve is connected with the first capillary tube in series and then connected with the second capillary tube in parallel.

Preferably, the throttling device comprises a supercooling coil and an electronic expansion valve, the liquid storage is connected with the supercooling coil and the first electronic expansion valve, and the supercooling coil is further connected with the gas-liquid separator, the first electronic expansion valve and the second operation valve.

Compared with the prior art, the utility model has the advantages and positive effects that:

the heat exchange structure form of the utility model not only can play a role in adjusting the heat exchange capacity, reasonably utilizes the heat exchange capacity, but also can better optimize the uniformity of split flow and improve the use efficiency of heat exchange; in addition, the running stability, the reliability and the energy conservation of the system can be improved.

Drawings

Fig. 1 is a perspective view of heat exchange with wide capacity control according to an embodiment of the present utility model.

FIG. 2 is a side view of a heat exchange with wide capacity control according to an embodiment of the present utility model.

Fig. 3 is a schematic view illustrating a structure of an outdoor unit having a wide capacity control heat exchange according to an embodiment of the present utility model.

The drawing is marked:

the distributor assembly 2, the electronic expansion valve assembly 3, the elbow 4, the inlet 5 of the liquid inlet pipe, the outlet 6 of the gas collecting pipe, the electronic expansion valve 7, the one-way valve 8, the filter 9, the compressor 10, the gas-liquid separator 11, the oil separator 12, the four-way valve 13, the one-way valve 14, the liquid storage 15, the first operation valve 16, the second operation valve 17, the heat exchange 18 with wide capacity control, the electromagnetic valve 19, the first capillary tube 20, the second capillary tube 21, the cooling coil 22 and the first electronic expansion valve 23.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

The present utility model will be specifically described below by way of exemplary embodiments. It is to be understood that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "inner", "outer", "upper", "lower", "front", "rear", etc. are based on the positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Examples

Referring to fig. 1-2, a heat exchange with wide capacity control comprises a shell 1, wherein the heat exchange is divided into an upper half heat exchange and a lower half heat exchange, the upper half heat exchange and the lower half heat exchange respectively comprise a distributor assembly 2, an electronic expansion valve assembly 3, a plurality of heat exchange pipelines connected with the distributor assembly 2 and a plurality of fins connected with the heat exchange pipelines, the electronic expansion valve assembly 3 is connected with the distributor assembly 2, the distributor assembly 2 is connected with the heat exchange pipelines, the heat exchange pipelines are externally connected with the fins, the heat exchange pipelines are connected through bends 4, the heat exchange pipelines and the fins are arranged inside the shell 1, and the ratio of the heat exchange area of the upper half heat exchange to the heat exchange area of the lower half heat exchange is 1:2. In this embodiment, fig. 1 shows a liquid inlet pipe total inlet 5 and a gas collecting pipe total outlet 6, and in a heating mode, a total gas outlet connected with a heat exchange pipeline is the gas collecting pipe total outlet 6 in the upper half heat exchange, and a total liquid inlet connected with two distributor assemblies 2 is the liquid inlet pipe total inlet 5 in the lower half heat exchange. During heating, the refrigerant is shunted to the two distributor assemblies 2 from the liquid inlet pipe main inlet 5, then enters the heat exchange pipeline of the heat exchange of the upper half part and the heat exchange of the lower half part through the two distributor assemblies 2 respectively, and the refrigerant is discharged from the gas collecting pipe assembly 6 after heat exchange and vaporization of the heat exchange pipeline.

The design manner of the embodiment has 2 benefits, and the first is that compared with the heat exchange form with only one distributor assembly in the heating mode, the uniformity of the refrigerant can be better controlled due to the upper and lower distributor assemblies, and the utilization efficiency of heat exchange per unit area is improved. The second is that the heat exchange area of heat exchange can be controlled in a layered manner in the heating mode. The heat exchange area of the upper half is about 1/3 of the total heat exchange area. The heat exchange of the lower half part accounts for about 2/3 of the total heat exchange area. Therefore, the heat exchange area can be divided into 3 grades, namely 1/3 heat exchange area, 2/3 heat exchange area and the whole heat exchange area, so as to adjust the capacity of the outdoor unit.

As a preferred implementation of this embodiment, the cross section of the housing 1 is of the "G" type. Since the housing 1 is integrally formed in a structure similar to a "G" shape, the heat exchange area can be greatly increased.

As a preferred implementation of this embodiment, the electronic expansion valve assembly 3 includes an electronic expansion valve 7 and a check valve 8 connected in parallel, and a filter 9 is connected to both ends of the electronic expansion valve 7. When the refrigeration cycle is performed, the mass flow of the refrigerant is large, the electronic expansion valve with a large caliber is required to be selected, and when the refrigeration cycle is performed, the mass flow of the refrigerant is small, and the electronic expansion valve with a small caliber is required to be selected. The embodiment selects a structure form of a small-caliber electronic expansion valve and a single-phase valve to perfectly solve the problem due to the cost limitation of the large-caliber electronic expansion valve and the flow precision requirement during heating. Not only is the overall cost of the electronic expansion valve reduced, but the flow control is more accurate in the heating mode.

Referring to fig. 3, the present embodiment further provides an outdoor unit employing the heat exchange with wide capacity control, including a compressor 10, a gas-liquid separator 11, an oil separator 12, an oil return line, a four-way valve 13, a check valve 14, a liquid reservoir 15, a throttling device, a first operating valve 16, and a second operating valve 17, where the compressor 10 is connected to the oil separator 12, the oil return line, and the gas-liquid separator 11, the oil separator 12 is connected to the check valve 14, and the oil return line, the check valve 14 is connected to the four-way valve 13, the four-way valve 13 is further connected to the first operating valve 16, the gas-liquid separator 11, and the heat exchange with wide capacity control 18 is sequentially connected to the liquid reservoir 15, the throttling device, and the second operating valve 17, and the throttling device is further connected to a pipeline between the four-way valve 13 and the gas-liquid separator 11.

The oil return pipeline comprises an electromagnetic valve 19, a first capillary tube 20 and a second capillary tube 21, and the electromagnetic valve 19 is connected with the first capillary tube 20 in series and then connected with the second capillary tube 21 in parallel.

The throttling device comprises a supercooling coil 22 and a first electronic expansion valve 23, the liquid storage 15 is connected with the supercooling coil 22 and the first electronic expansion valve 23, and the supercooling coil 22 is also connected with the gas-liquid separator 11, the first electronic expansion valve 23 and the second operation valve 17.

Under the condition of high-temperature heating (outdoor environment temperature is above 15 ℃), the indoor unit is small in startup capacity (startup capacity is below 3.6 KW), the outdoor unit is large in capacity (above 40 KW), the heat exchange effect is good due to the fact that the outdoor heat exchange area is large, the low-pressure on the outdoor side is high, the corresponding high-pressure is high, even if the frequency of a compressor and a fan are reduced to the lowest gear, the system can frequently report high-pressure faults, and the running stability, the reliability and the energy-saving performance of the system are all poor. If the heat exchange mode of this embodiment is adopted, in the heating mode, when the outdoor environment temperature is higher than 15 ℃, the indoor starting capacity is smaller than 3.6KW, the system high pressure is higher than or equal to 3Mpa, the operating frequency of the compressor 10 is 20HZ, the opening of one of the two electronic expansion valves 7 in the two electronic expansion valve assemblies 3 is set to 0 step, only the refrigerant passes through the other electronic expansion valve 7, the electronic expansion valve 7 is adjusted according to the degree of superheat of the heat exchange, only part of the heat exchange of the outdoor heat exchange plays a role in heat exchange, the operation is carried out for 10 minutes, then the judgment is carried out again, whether the heating mode is still adopted, whether the system high pressure is still higher than or equal to 3Mpa, whether the operating frequency of the compressor 10 is 20HZ is still satisfied, if the above three conditions are still satisfied at the same time, the initial opening of the closed electronic expansion valve 7 is 100, then the opening of the electronic expansion valve 7 controlled according to the degree of superheat of the heat exchange is adjusted, the other components are normally controlled according to the degree of superheat of the heat exchange, and the control is maintained until the above control is satisfied. The exit condition comprises that the air conditioner is in a non-heating mode, or the high pressure of the system is less than or equal to 2.7Mpa, or the compressor is shut down. The control can achieve the desired low pressure, so that the high pressure of the system is better controlled, the good heat exchange effect is achieved, and the system stability is better.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims

1. A heat exchanger with wide capacity control, comprising a housing, characterized in that: the heat exchange is divided into an upper half heat exchange part and a lower half heat exchange part, the upper half heat exchange part and the lower half heat exchange part respectively comprise a distributor assembly, an electronic expansion valve assembly, a plurality of heat exchange pipelines connected with the distributor assembly and a plurality of fins connected with the heat exchange pipelines, the electronic expansion valve assembly is connected with the distributor assembly, the distributor assembly is connected with the heat exchange pipelines, the fins are externally connected with the heat exchange pipelines, the heat exchange pipelines and the fins are arranged inside a shell, and the ratio of the heat exchange area of the upper half heat exchange part to the heat exchange area of the lower half heat exchange part is 1:2.

2. The heat exchange with wide capacity control according to claim 1, characterized in that: the cross section of the shell is G-shaped.

3. The heat exchange with wide capacity control according to claim 1, characterized in that: the electronic expansion valve assembly comprises an electromagnetic expansion valve and a one-way valve which are connected in parallel.

4. An outdoor unit for heat exchange with wide capacity control according to any one of claims 1 to 3, comprising a compressor, a gas-liquid separator, an oil return line, a four-way valve, a check valve, a liquid reservoir, a throttle device, a first operating valve, a second operating valve, characterized in that: the compressor is connected with the oil separator, the oil return pipeline and the gas-liquid separator respectively, the oil separator is connected with the one-way valve and the oil return pipeline, the one-way valve is connected with the four-way valve, the four-way valve is also connected with the first operation valve, the gas-liquid separator and the heat exchange with wide capacity control, the heat exchange with wide capacity control is sequentially connected with the liquid storage device, the throttling device and the second operation valve, and the throttling device is also connected with the pipeline between the four-way valve and the gas-liquid separator.

5. The outdoor unit of claim 4, wherein: the oil return pipeline comprises an electromagnetic valve, a first capillary tube and a second capillary tube, and the electromagnetic valve is connected with the first capillary tube in series and then connected with the second capillary tube in parallel.

6. The outdoor unit of claim 4, wherein: the throttling device comprises a supercooling coil pipe and a first electronic expansion valve, the liquid storage device is connected with the supercooling coil pipe and the electronic expansion valve, and the supercooling coil pipe is further connected with the gas-liquid separator, the first electronic expansion valve and the second operation valve.