CN213687348U - Air-cooled heat pump heat exchange system - Google Patents

Abstract

The utility model relates to the technical field of heat exchange, in particular to an air-cooled heat pump heat exchange system which comprises a heat exchange circulation path, a first heat exchanger and a reversing valve; the first heat exchanger and the reversing valve are arranged on the heat exchange circulation path in series, and the first heat exchanger is used for exchanging heat with the outside; the air-cooled heat pump heat exchange system further comprises a one-way conduction path and a gas-liquid separation path, the one-way conduction path and the gas-liquid separation path are connected to the heat exchange circulation path in parallel, the one-way conduction path and the gas-liquid separation path are arranged between the first heat exchanger and the reversing valve, an inlet of the one-way conduction path is communicated with the reversing valve, and an outlet of the one-way conduction path is communicated with the first heat exchanger. The utility model has the advantages that: can prevent to return liquid and the unit performance is high.

Description

Air-cooled heat pump heat exchange system

Technical Field

The utility model relates to a heat transfer technical field especially relates to an air-cooled heat pump heat transfer system.

Background

The air-cooled heat pump heat exchange system is applied to a water heater or other devices needing heat exchange and is used for exchanging heat for water to obtain needed hot water or cold water.

The common air-cooled heat pump heat exchange system comprises a heat exchange circulation path, a heat exchanger, a gas-liquid separator and a reversing valve, wherein the heat exchanger is used for exchanging heat with the outside; the gas-liquid separator is arranged between the reversing valve and the air suction port of the compressor and used for preventing the compressor from being damaged due to liquid return.

However, in the prior art, most of the liquid return states are heating states, liquid return is rarely caused in a refrigerating state, and the existence of the gas-liquid separator on the suction pipeline easily causes the loss of the suction evaporation temperature of the compressor due to the pressure drop of the gas-liquid separator in the refrigerating state, so that the unit performance is reduced in the refrigerating state.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide an air-cooled heat pump heat exchange system with high unit performance, which can prevent liquid return.

In order to solve the technical problem, the application provides the following technical scheme:

an air-cooled heat pump heat exchange system comprises a heat exchange circulation path, a first heat exchanger and a reversing valve; the first heat exchanger and the reversing valve are arranged on the heat exchange circulation path in series, and the first heat exchanger is used for exchanging heat with the outside; the air-cooled heat pump heat exchange system further comprises a one-way conduction path and a gas-liquid separation path, the one-way conduction path and the gas-liquid separation path are connected to the heat exchange circulation path in parallel, the one-way conduction path and the gas-liquid separation path are arranged between the first heat exchanger and the reversing valve, an inlet of the one-way conduction path is communicated with the reversing valve, and an outlet of the one-way conduction path is communicated with the first heat exchanger.

In the application, the one-way conduction path and the gas-liquid separation path are connected in parallel to the heat exchange circulation path, and the one-way conduction path and the gas-liquid separation path are arranged between the first heat exchanger and the reversing valve; in the refrigeration mode, the gas-liquid separation path is positioned at the high-pressure side, a medium can directly circulate from the one-way conduction path, and extra evaporation temperature loss caused by pressure drop of other parts is avoided, so that the performance of the unit is improved; meanwhile, in the heating mode, the one-way conduction path is not communicated due to one-way conduction, the first heat exchanger serving as the evaporator is communicated with the gas-liquid separation path firstly and then communicated with the reversing valve, and the gas-liquid separation path can play a role in preventing liquid return and protecting the compressor unit.

In one embodiment, a one-way valve is arranged on the one-way conduction path, an inlet of the one-way valve is communicated with the reversing valve, and an outlet of the one-way valve is communicated with the first heat exchanger.

Due to the arrangement, under the one-way conduction effect of the one-way valve and the refrigeration mode, a medium can directly enter the first heat exchanger from the one-way conduction path for heat exchange without passing through a gas-liquid separation path, so that the evaporation temperature loss caused by the pressure drop of the gas-liquid separation path under the refrigeration state and the unit performance reduction are avoided; in the heating mode, due to the one-way conduction of the one-way valve, the medium can only enter the gas-liquid separation path for gas-liquid separation, so that the gaseous medium is fully separated, and the protection effect of preventing liquid return is achieved.

In one embodiment, a gas-liquid separator is arranged on the gas-liquid separation path and used for separating gas and liquid media in the heat exchange circulation path.

So set up, vapour and liquid separator is used for the separation of gas-liquid medium in the heat transfer circulation way.

In one embodiment, the air-cooled heat pump heat exchange system further comprises a compressor, the compressor is arranged on the heat exchange circulation path in series with the first heat exchanger and the reversing valve, and a suction port and an air outlet of the compressor are respectively communicated with the reversing valve.

So configured, the compressor is used to compress the medium into a high temperature, high pressure gaseous medium.

In one embodiment, the air-cooled heat pump heat exchange system further comprises a second heat exchanger, and the second heat exchanger, the first heat exchanger and the reversing valve are arranged in the heat exchange circulation path in series and used for exchanging heat with water.

So set up, the second heat exchanger is used for exchanging heat with water, supplies hot water or cold water for required place.

In one embodiment, the air-cooled heat pump heat exchange system further comprises a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are respectively connected with the second heat exchanger, and water in the water inlet pipe flows out of the water outlet pipe after exchanging heat with the second heat exchanger.

So set up, be convenient for the heat transfer and the circulation of water.

In one embodiment, the air-cooled heat pump heat exchange system further comprises a throttling element, the throttling element is arranged in the heat exchange circulation path in series with the first heat exchanger and the reversing valve, and the throttling element is arranged between the first heat exchanger and the second heat exchanger.

So arranged, the throttling element is used for converting the medium state into a low-temperature and low-pressure medium.

In one embodiment, the throttling element is an electronic expansion valve or a thermal expansion valve.

So set up, connect convenient with low costs, and can play the same throttle effect.

In one embodiment, the reversing valve is a four-way valve.

So set up, the cross valve is comparatively convenient at the switching flow path when using under refrigeration mode and the mode of heating.

In one embodiment, the number of the first heat exchangers is multiple, and the multiple first heat exchangers are arranged in the heat exchange circulation path in series.

So set up, increase the quantity of first heat exchanger and can increase heat transfer area and heat exchange efficiency.

Compared with the prior art, the air-cooled heat pump heat exchange system provided by the application has the advantages that the one-way conduction path and the gas-liquid separation path are connected in parallel to the heat exchange circulation path, and the one-way conduction path and the gas-liquid separation path are arranged between the first heat exchanger and the reversing valve; in the refrigeration mode, because the gas-liquid separation path is positioned at the high-pressure side, a medium can directly circulate from the one-way conduction path, and extra evaporation temperature loss caused by pressure drop of other parts is avoided, so that the performance of the unit is improved; in the heating mode, because the one-way conduction path is not communicated, the first heat exchanger serving as the evaporator is firstly communicated with the gas-liquid separation path and then communicated with the reversing valve, and the gas-liquid separation path can play a role in protecting liquid return.

Drawings

Fig. 1 is a schematic diagram of a heat exchange system of an air-cooled heat pump provided by the present application.

Fig. 2 is a schematic view of an air-cooled heat pump heat exchange system in a refrigeration mode provided by the present application.

Fig. 3 is a schematic view of an air-cooled heat pump heat exchange system in a heating mode provided in the present application.

In the figure, 100, an air-cooled heat pump heat exchange system; 10. a heat exchange circulation path; 11. a first heat exchanger; 12. a diverter valve; 20. a one-way conduction path; 21. a one-way valve; 30. a gas-liquid separation path; 31. a gas-liquid separator; 40. a compressor; 50. a second heat exchanger; 60. a water inlet pipe; 70. a water outlet pipe; 80. a throttling element.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 work all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-3, the utility model provides an air-cooled heat pump heat exchange system 100, this air-cooled heat pump heat exchange system 100 is applied to water heater etc. and need carry out the heat transfer and supply with in the required device for heat or cool down water.

Referring to fig. 1, fig. 1 is a schematic view of an air-cooled heat pump heat exchange system 100 according to an embodiment of the present invention, where the air-cooled heat pump heat exchange system 100 includes a heat exchange circulation path 10, a first heat exchanger 11, and a reversing valve 12; the first heat exchanger 11 and the reversing valve 12 are arranged on the heat exchange circulation path 10 in series, and the first heat exchanger 11 is used for exchanging heat with the outside; the air-cooled heat pump heat exchange system 100 further comprises a one-way conduction path 20 and a gas-liquid separation path 30, wherein the one-way conduction path 20 has a one-way conduction function, and the gas-liquid separation path 30 is used for carrying out gas-liquid separation on a medium to obtain a required gaseous medium; the one-way conduction path 20 and the gas-liquid separation path 30 are connected in parallel to the heat exchange circulation path 10, the one-way conduction path 20 and the gas-liquid separation path 30 are arranged between the first heat exchanger 11 and the reversing valve 12, an inlet of the one-way conduction path 20 is communicated with the reversing valve 12, and an outlet of the one-way conduction path 20 is communicated with the first heat exchanger 11.

Specifically, in this application, the reversing valve 12 is a four-way valve, and it is relatively convenient to switch flow paths when the four-way valve is used in a cooling mode and a heating mode. Of course, in other embodiments, the directional valve 12 may also be a five-way valve, which may be set according to system requirements.

Preferably, the number of the first heat exchangers 11 is plural, and the plural first heat exchangers 11 are provided in the heat exchange circulation path 10 in series. It can be understood that the plurality of first heat exchangers 11 arranged in series are arranged, so that the heat exchange area can be increased, and the heat exchange efficiency is improved. Preferably, in the present application, the number of the first heat exchangers 11 is two, but of course, in other embodiments, the number of the first heat exchangers 11 may be other numbers, such as three, four or five.

As shown in fig. 2 and 3, fig. 2 shows a flow direction of the medium in the cooling mode, in which the medium can flow through the one-way conduction path 20 in the cooling state, and fig. 3 shows a flow direction of the medium in the heating mode, in which the medium can flow only through the gas-liquid separation path 30 in the heating state and can be sufficiently separated; thereby preventing liquid return, improving the performance of the unit and reducing the temperature loss. In the refrigeration mode, because the gas-liquid separation path 30 is positioned at the high-pressure side, the medium can directly circulate from the one-way conduction path 20, and no extra evaporation temperature loss caused by pressure drop of other parts exists, so that the performance of the unit is improved; in the heating mode, since the unidirectional passage 20 is not communicated, the first heat exchanger 11 serving as the evaporator is communicated with the gas-liquid separation passage 30 and then communicated with the selector valve 12, and at this time, the gas-liquid separation passage 30 can play a role of protecting against liquid return and can sufficiently separate a medium in which gas and liquid are mixed.

If the inlet of the one-way guide passage 20 is communicated with the first heat exchanger 11 and the outlet of the one-way guide passage 20 is communicated with the reversing valve 12, at this time, in the heating mode, a part of gas-liquid mixed medium can flow out of the one-way guide passage 20, so that the gas-liquid mixed medium cannot be fully separated, and liquid return is easily generated to reduce the performance of the unit; in the refrigeration mode, the medium flows through the gas-liquid separation path 30 entirely, resulting in evaporation temperature loss due to pressure drop of the gas-liquid separation path 30, and the unit performance is reduced.

Specifically, a one-way valve 21 is arranged on the one-way conduction path 20, an inlet of the one-way valve 21 is communicated with the reversing valve 12, and an outlet of the one-way valve 21 is communicated with the first heat exchanger 11; due to the one-way conduction function of the one-way valve 21, under the refrigeration mode, a medium can directly enter the first heat exchanger 11 from the one-way conduction path 20 for heat exchange without passing through the gas-liquid separation path 30, so that the evaporation temperature loss and the unit performance reduction caused by the pressure drop of the gas-liquid separation path 30 under the refrigeration state are avoided; in the heating mode, due to the one-way conduction of the one-way valve 21, the medium can only enter the gas-liquid separation path 30 for gas-liquid separation, so that the gaseous medium is fully separated, and the protection function of preventing liquid return is achieved.

Specifically, the gas-liquid separation path 30 is provided with a gas-liquid separator 31, and the gas-liquid separator 31 is used for separating gas and liquid media in the heat exchange circulation path 10, so as to play a role in protecting liquid return prevention; in the heating mode, a medium in which gas and liquid are mixed flows into the gas-liquid separator 31 to be separated, and the gaseous medium obtained after separation is discharged to prevent liquid return.

As shown in fig. 1, the air-cooled heat pump heat exchange system 100 further includes a compressor 40, the compressor 40 is used for compressing the medium into a high-temperature and high-pressure gaseous medium, the compressor 40 is arranged on the heat exchange circulation path 10 in series with the first heat exchanger 11 and the reversing valve 12, and an air suction port and an air outlet of the compressor 40 are respectively communicated with the reversing valve 12; if the unidirectional passage 20 and the gas-liquid separation passage 30 are provided between the reversing valve 12 and the suction port of the compressor 40, in the heating mode, a part of the gas-liquid mixture medium can flow out from the unidirectional passage 20, and cannot be sufficiently separated, and liquid returns are likely to occur, which may deteriorate the performance of the compressor 40.

Further, the air-cooled heat pump heat exchange system 100 further comprises a second heat exchanger 50, and the second heat exchanger 50, the first heat exchanger 11 and the reversing valve 12 are arranged in the heat exchange circulation path 10 in series; in the cooling mode, the low temperature medium enters the second heat exchanger 50, and discharges cold water by absorbing heat of water; in the heating mode, the high-temperature medium enters the second heat exchanger 50, and hot water is discharged by heat release.

Further, the air-cooled heat pump heat exchange system 100 further includes a water inlet pipe 60 and a water outlet pipe 70, the water inlet pipe 60 and the water outlet pipe 70 are respectively connected to the second heat exchanger 50, and water in the water inlet pipe 60 flows out from the water outlet pipe 70 after exchanging heat with the second heat exchanger 50, so as to obtain corresponding hot water or cold water.

Further, the air-cooled heat pump heat exchange system 100 further includes a throttling element 80, the throttling element 80 is arranged in the heat exchange circulation path 10 in series with the first heat exchanger 11 and the reversing valve 12, and the throttling element 80 is arranged between the first heat exchanger 11 and the second heat exchanger 50 and is used for throttling and reducing pressure so as to convert the state of the medium into a low-temperature and low-pressure medium.

Specifically, in the present embodiment, the throttling element 80 is an electronic expansion valve, which is not only convenient to connect, low in cost, but also good in throttling effect. Of course, in other embodiments, the throttling element 80 may also be a thermal expansion valve or the like that is capable of performing the same function as the throttling element 80.

The working process of the air-cooled heat pump heat exchange system 100 is explained as follows:

when the air-cooled heat pump heat exchange system 100 is in a cooling mode, the low-temperature and low-pressure fluid medium in the heat exchange circulation path 10 flows into the suction port of the compressor 40 through the four-way valve, the high-temperature and high-pressure gaseous fluid medium flowing out from the air outlet of the compressor 40 enters the one-way conduction path 20 and flows to the first heat exchanger 11, the heat is released through the first heat exchanger 11 to obtain the low-temperature fluid medium, and then the low-temperature fluid medium enters the second heat exchanger 50 for heat exchange, so that the cold.

When the air-cooled heat pump heat exchange system 100 is in the heating mode, the low-temperature and low-pressure fluid medium in the heat exchange circulation path 10 directly flows into the gas-liquid separator 31, the gas-liquid separator 31 performs gas-liquid separation, the obtained low-temperature and low-pressure gaseous fluid medium flows into the suction port of the compressor 40 through the four-way valve, and the high-temperature and high-pressure fluid medium flowing out from the air outlet of the compressor 40 enters the second heat exchanger 50 for heat exchange, so that the hot water is discharged from the water outlet pipe 70. It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims (10)

1. An air-cooled heat pump heat exchange system comprises a heat exchange circulation path, a first heat exchanger and a reversing valve; the first heat exchanger and the reversing valve are arranged on the heat exchange circulation path in series, and the first heat exchanger is used for exchanging heat with the outside;

the air-cooled heat pump heat exchange system is characterized by further comprising a one-way conduction path and a gas-liquid separation path, wherein the one-way conduction path and the gas-liquid separation path are connected to the heat exchange circulation path in parallel, the one-way conduction path and the gas-liquid separation path are arranged between the first heat exchanger and the reversing valve, an inlet of the one-way conduction path is communicated with the reversing valve, and an outlet of the one-way conduction path is communicated with the first heat exchanger.

2. The air-cooled heat pump heat exchange system according to claim 1, wherein a one-way valve is arranged on the one-way conduction path, an inlet of the one-way valve is communicated with the reversing valve, and an outlet of the one-way valve is communicated with the first heat exchanger.

3. The air-cooled heat pump heat exchange system according to claim 1 or 2, wherein a gas-liquid separator is arranged on the gas-liquid separation path, and the gas-liquid separator is used for separating gas and liquid media in the heat exchange circulation path.

4. The air-cooled heat pump heat exchange system according to claim 1, further comprising a compressor, wherein the compressor is connected in series with the first heat exchanger and the reversing valve on the heat exchange circulation path, and an air inlet and an air outlet of the compressor are respectively communicated with the reversing valve.

5. The air-cooled heat pump heat exchange system according to claim 1, further comprising a second heat exchanger, wherein the second heat exchanger is arranged in the heat exchange circulation path in series with the first heat exchanger and the reversing valve, and is used for exchanging heat with water.

6. The air-cooled heat pump heat exchange system of claim 5, further comprising a water inlet pipe and a water outlet pipe, wherein the water inlet pipe and the water outlet pipe are respectively connected with the second heat exchanger, and water in the water inlet pipe flows out of the water outlet pipe after exchanging heat with the second heat exchanger.

7. The air-cooled heat pump heat exchange system of claim 6, further comprising a throttling element, wherein the throttling element is arranged in the heat exchange circulation path in series with the first heat exchanger and the reversing valve, and the throttling element is arranged between the first heat exchanger and the second heat exchanger.

8. The air-cooled heat pump heat exchange system of claim 7, wherein the throttling element is an electronic expansion valve or a thermostatic expansion valve.

9. The air-cooled heat pump heat exchange system of claim 1, wherein the reversing valve is a four-way valve.

10. The air-cooled heat pump heat exchange system according to claim 1, wherein the number of the first heat exchangers is plural, and the plural first heat exchangers are arranged in the heat exchange circulation path in series.

Images