CN210718200U - a heat pump system - Google Patents

Abstract

The utility model relates to the field of air conditioning, and provides a heat pump system, comprising a refrigeration circuit and a solution circulation unit. The refrigeration circuit includes a compressor, a first heat exchanger, a throttling device and a second heat exchanger. The first and second heat exchangers It includes first and second refrigerant heat exchange channels respectively; the solution circulation unit includes a first spray device, a second spray device, a first container and a second container; the first spray device and the second container are respectively connected to the second container. An outlet end and an inlet end of a heat exchange channel, and the second spray device and the first container are respectively connected to the outlet end and the inlet end of the second heat exchange channel. The utility model adopts the solution spray to assist the direct expansion type heat pump system to process the air, so that the evaporation temperature of the heat pump system is increased and the condensation temperature is decreased; The solution pretreatment and re-spraying heat exchange are realized, and the sensible heat exchange between the solution and the air can be realized in the transition season to achieve the purpose of free cooling.

Description

a heat pump system

technical field

The utility model relates to the field of air conditioners, in particular to a heat pump system.

Background technique

At present, with the improvement of people's requirements for indoor thermal comfort and energy saving and emission reduction, heat pump air conditioning systems are widely used, but there are still some shortcomings in traditional heat pump air conditioning systems.

The traditional heat pump air-conditioning system using water as the refrigerant, produces chilled water to cool the air and condense and dehumidify the air in summer. If the supply air temperature is too low, the indoor thermal comfort is low. If the supply air is reheated, the cold and heat will be offset. , resulting in waste of energy; the condensed water produced by the condensation and dehumidification process is easy to breed bacteria and pollute the indoor environment.

The direct expansion heat pump system has the advantage of reducing the heat exchange link between the refrigerant and the air, but as a traditional small indoor air conditioner, in addition to the above problems, there are also the following problems: the evaporator and the condenser both use the temperature difference to display the heat. The heat exchange, and thus the evaporating and condensing temperatures, are limited by the environment; the air cannot be humidified in winter.

The reason why the traditional heat pump system has the above problems is that in summer, a low-temperature cold source is used to deal with the indoor latent heat load and sensible heat load at the same time by condensing and dehumidifying to cool down.

The temperature and humidity independent control air conditioning system treats the indoor latent heat load and sensible heat load separately, and is borne by the fresh air and the indoor circulating air, that is, a separate dehumidification and humidification equipment is used to control the humidity of the fresh air, and another set of equipment is used to control the humidity of the fresh air through a high temperature cold source. The indoor circulating air is cooled by sensible heat, thereby solving the above problems.

However, the temperature and humidity independent control air-conditioning system still has the following shortcomings: using two sets of treatment systems for fresh air and circulating air, the system is complex, the initial investment is high, and the control requirements are high; for most cases, pure circulating air or air conditioners with small fresh air volume The system can easily lead to insufficient dehumidification, and the external environment cannot be fully utilized for free cooling in the transition season.

In contrast, the current direct-expansion solid adsorption dehumidification heat pump air-conditioning system uses a set of equipment to solve the above problems.

For example, Chinese patent application No. 201110318394.1 is a utility model patent for "heat pump system based on solid dehumidification and independent control of heat and humidity driven by condensation waste heat", in which both the dehumidification evaporator and the regenerative condenser are attached to traditional finned tubes with solid adsorption materials The surface of the heat exchanger is made of type heat exchanger, and the evaporative cooling and condensing heat are respectively used for the dehumidification and regeneration process of the hygroscopic agent, and the refrigerant pipeline and the air pipeline are switched through the valve to operate alternately according to a certain period. Therefore, the heat pump system cannot continuously operate the air dehumidification condition.

For this reason, the utility model patent of "Semi-decoupled cooling and dehumidification and staged cooling dehumidification heat pump system and method" with the Chinese patent application number 201710335443.X solves the problem of not being able to continuously cool the air by setting up an evaporator on the basis of the above scheme. Dehumidification cooling problem. However, there are still some shortcomings: the refrigerant pipeline and air pipeline are complex, occupying a large space; the solid desiccant conducts heat conduction through direct contact with the surface of the heat exchanger, so there is a large contact thermal resistance, and the heat exchange effect needs to be further improved; solid desiccant The coating technology still needs to be further developed and mature; the heat exchanger attached to the adsorbent material (material of solid desiccant) has a large heat capacity, and it takes a long time to reach a stable state after alternate operation. During this time, the system's sensible heat load handling capacity is often difficult. fulfil requirements.

Utility model content

The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

In order to achieve this purpose, the present invention provides a heat pump system, including a refrigeration circuit, the refrigeration circuit includes a compressor, a first heat exchanger, a throttling device and a second heat exchanger, and further includes:

solution circulation unit;

The first heat exchanger and the second heat exchanger respectively include a refrigerant heat exchange channel for the circulation of the refrigerant in the refrigeration circuit, and the first heat exchanger includes a second heat exchanger for the circulation of the solution in the solution circulation unit. a heat exchange channel, the second heat exchanger includes a second heat exchange channel for solution circulation in the solution circulation unit;

The solution circulation unit includes:

a first spray device, located above the first heat exchanger, and communicated with the first heat exchange channel;

a second spray device, located above the second heat exchanger, and communicated with the second heat exchange channel;

a first container, located below the first spray device to receive the solution flowing through the first heat exchanger, and communicated with the second heat exchange channel;

The second container is located below the second spray device to receive the solution flowing through the second heat exchanger, and is connected to the first heat exchange channel;

The first spray device and the second container are respectively connected to the outlet end and the inlet end of the first heat exchange channel, and the second spray device and the first container are respectively connected to the second heat exchange channel. The outlet end and the inlet end of the heat exchange channel.

According to one embodiment of the present invention, the solution circulation unit is provided with a third heat exchanger, the third heat exchanger includes two third heat exchange channels, and the two third heat exchange channels are respectively It is located between the first container and the second heat exchange channel, and between the second container and the first heat exchange channel.

According to one embodiment of the present invention, the outlet end of the first heat exchange channel is communicated with the inlet end of the second heat exchange channel through a first pipeline, and the outlet end of the second heat exchange channel is connected through a second The pipeline is connected to the inlet end of the first heat exchange channel, and the outlet end of the first heat exchange channel is selectively connected to the first spray device or the first pipeline; the second heat exchange channel One of the outlet ends of the outlet leads to the second spraying device or the second pipeline.

According to one embodiment of the present invention, the solution circulation unit is provided with a third heat exchanger, the third heat exchanger includes two third heat exchange channels, and the two third heat exchange channels are respectively Located between the first container and the second heat exchange channel, and between the second container and the first heat exchange channel; the first pipeline and the second pipeline respectively include different the third heat exchange channel.

According to one embodiment of the present invention, a bypass pipe section is connected in parallel with the third heat exchanger, and the bypass pipe section is alternately connected to one of the third heat exchange channels.

According to one embodiment of the present invention, the solution circulation unit includes a first circulation pump and a second circulation pump, the first circulation pump is located between the first container and the second spray device, The second circulation pump is located between the second container and the first spray device.

According to one embodiment of the present invention, the refrigeration circuit includes a four-way reversing valve, and the compressor communicates with the first heat exchanger and the second heat exchanger through the four-way reversing valve.

According to one embodiment of the present invention, the first heat exchanger is provided with a first air passage, and the air in the first air passage is fresh air and/or exhaust air; the second heat exchanger is provided with a first air passage. There is a second air passage, and the air of the second air passage is fresh air and/or return air.

According to one embodiment of the present invention, counter-flow heat exchange or cross-flow heat exchange is performed between the first air channel and the first spray device; Counter-current heat exchange or cross-flow heat exchange.

The technical scheme of the present invention has the following advantages:

First, since the first spray device is located above the first heat exchanger and the second spray device is located above the second heat exchanger, the solution conducts convective heat exchange in the form of flushing the surfaces of the first heat exchanger and the second heat exchanger , Compared with the heat conduction of solid desiccant and the existence of contact thermal resistance, solution convection scouring has better heat transfer effect. Secondly, this kind of heat pump system uses the solution circulation unit to assist the direct expansion heat pump system (refrigeration circuit), while realizing its own stable circulation process, the dehumidification heat release and regeneration heat absorption process of the solution make full use of the evaporator cooling capacity of the heat pump system And the heat of the condenser, the dehumidification process higher than the dew point temperature of the air is realized on the evaporation side, the evaporation temperature is increased, and the dehumidification process of cooling, isothermal or heating can be realized; different from the traditional direct expansion heat pump system only adopts the form of air-cooled heat exchange. Evaporative cooling of the water vapor in the solution on the condensing side can reduce the condensing temperature and significantly improve the system performance. Finally, the first heat exchanger and the second heat exchanger are three-medium heat exchangers that can realize any two-by-two heat exchange between the three media, so as to achieve the purpose of solution pre-cooling and internal cooling moisture absorption in the same equipment, or to achieve solution The purpose of preheating and internal heat dehumidification makes the structure of the heat pump system more compact. The three media include air (or a two-phase mixture of solution and air), refrigerant in the refrigeration circuit, and solution in the solution circulation unit.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic structural diagram of a heat pump system according to an embodiment of the present invention;

2 is a schematic structural diagram of another heat pump system according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of the heat pump system in FIG. 2 under one of the working conditions;

In the figure: 1, the first heat exchange device; 11, the first spray device; 12, the first heat exchanger; 2, the second heat exchange device; 21, the second spray device; 22, the second heat exchanger 3. The first circulating pump; 4. The second circulating pump; 5. The third heat exchanger; 6. The compressor; 7. The throttling device; 8. The four-way reversing valve; , the second air channel; 13, the first valve; 14, the second valve; 15, the third valve; 16, the fourth valve; 17, the fifth valve; 18, the sixth valve; 19, the first pipeline; 20 , the second pipeline; 23, the first container; 24, the second container.

Detailed ways

The embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., means a specific feature described in connection with the embodiment or example, A structure, material, or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "horizontal", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility. The novel and simplified description does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or It can be connected integrally; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

1 to 3 are schematic structural diagrams of a heat pump system according to an embodiment of the present invention. Among them, the solid line in the figure represents the solution pipeline, and the dotted line represents the refrigerant pipeline of the refrigeration circuit.

According to an embodiment of the present invention, a heat pump system is provided, which adopts a solution circulation unit, utilizes the moisture absorption and humidification properties of the solution, and utilizes the advantages of the solution's fluidity to complete continuous and stable dehumidification and regeneration cycles; and spraying The convective heat transfer effect of the solution is better than that of the solid adsorbent material.

Referring to FIG. 1 , according to an embodiment of the present invention, a heat pump system is provided, including a refrigeration circuit and a solution circulation unit. The refrigeration circuit includes a compressor 6 , a first heat exchanger 12 , a throttling device 7 and a second heat exchanger 22 . The solution circulation unit includes a first spray device 11 , a second spray device 21 , a first container 23 and a second container 24 .

Wherein, the first heat exchanger 12 and the second heat exchanger 22 respectively include refrigerant heat exchange channels for the circulation of refrigerant in the refrigeration circuit, and the first heat exchanger 12 includes a first heat exchange channel for the circulation of the solution in the solution circulation unit The second heat exchanger 22 includes a second heat exchange channel for the circulation of the solution in the solution circulation unit. The first spray device 11 is located above the first heat exchanger 12 and communicates with the first heat exchange channel; the second spray device 21 is located above the second heat exchanger 22 and communicated with the second heat exchange channel; the first container 23 is located below the first spray device 11 to receive the solution flowing through the first heat exchanger 12, and communicates with the second heat exchange channel; the second container 24 is located below the second spray device 21 to receive the solution flowing through the second heat exchanger 23. The solution of the heater 22 is connected to the first heat exchange channel. The first spray device 11 and the second container 24 are respectively connected to the outlet end and the inlet end of the first heat exchange channel, and the second spray device 21 and the first container 23 are respectively connected to the outlet end and the inlet end of the second heat exchange channel end.

This heat pump system has the following advantages:

First, since the first spray device 11 is located above the first heat exchanger 12 and the second spray device 21 is located above the second heat exchanger 22 , the solution washes the surfaces of the first heat exchanger 12 and the second heat exchanger 22 Compared with the heat conduction of solid desiccant and the existence of contact thermal resistance, solution convective scouring has better heat exchange effect.

Secondly, this kind of heat pump system uses the solution circulation unit to assist the direct expansion heat pump system (refrigeration circuit), while realizing its own stable circulation process, the dehumidification heat release and regeneration heat absorption process of the solution make full use of the evaporator cooling capacity of the heat pump system And the heat of the condenser, the dehumidification process higher than the dew point temperature of the air is realized on the evaporation side, the evaporation temperature is increased, and the dehumidification process of cooling, isothermal or heating can be realized; different from the traditional direct expansion heat pump system only adopts the form of air-cooled heat exchange. Evaporative cooling of the water vapor in the solution on the condensing side can reduce the condensing temperature and significantly improve the system performance.

Finally, the first heat exchanger 12 and the second heat exchanger 22 are three-medium heat exchangers that can realize any two-by-two heat exchange between the three media, so as to achieve the purpose of pre-cooling the solution in the same device and absorbing moisture in the internal cooling, or To achieve the purpose of solution preheating and internal heat dehumidification, the structure of the heat pump system is more compact. The three media include air (or a two-phase mixture of solution and air), refrigerant in the refrigeration circuit, and solution in the solution circulation unit. Among them, the first spray device 11, the first heat exchanger 12 and the first container 23 can be regarded as a spray tower; the second spray device 21, the second heat exchanger 22 and the second container 24 can be regarded as for another spray tower. The first spray device 11 and the first heat exchanger 12 are combined to form a heat exchange device, which is defined as the first heat exchange device 1; the second spray device 21 and the second heat exchanger 22 are combined to form another heat exchange device device, which is defined as the second heat exchange device 2 .

In the first heat exchange device 1 , the air flows through the air passages corresponding to the first heat exchanger 12 (corresponding to the first air passages 9 mentioned later), and the solution passes through the air passages in the first heat exchanger 12 in the flow direction. The first heat exchange channel is then sprayed through the first spray device 11 . In the second heat exchange device 2 , the air flows through the air passages corresponding to the second heat exchanger 22 (corresponding to the second air passages 10 mentioned later), and the solution passes through the air passages in the second heat exchanger 22 in the flow direction. The second heat exchange channel is then sprayed through the second spray device 21 .

Please further refer to FIG. 1, the solution circulation unit is provided with a third heat exchanger 5, the third heat exchanger 5 includes two third heat exchange channels, and the two third heat exchange channels are respectively located in the first container 23 and the third heat exchange channel. between the two heat exchange channels, and between the second container 24 and the first heat exchange channel. Of course, the third heat exchanger 5 may not be provided.

The third heat exchanger 5 here is a heat recovery heat exchanger provided on the pipeline of the solution circulation unit. It can be used for heat exchange between hygroscopic solution and regeneration solution to improve energy utilization efficiency.

Please refer to FIG. 2 , which provides a heat pump system, which has all the functions of the heat pump system in FIG. 1 . In addition, in FIG. 2 : the outlet end of the first heat exchange channel is connected to the inlet end of the second heat exchange channel through the first pipeline 19 , and the outlet end of the second heat exchange channel is connected to the first heat exchange channel through the second pipeline 20 The inlet end of the channel, the outlet end of the first heat exchange channel is selected to be connected to the first spray device 11 or the first pipeline 19; the outlet end of the second heat exchange channel is selected to be connected to the second spray device 21 or other The second pipeline 20 is described.

In one case, in FIG. 2 , the first heat exchange channel is connected to the first spray device 11 , and the second heat exchange channel is connected to the second spray device 21 . At this time, the working principle of the heat pump system is obtained as shown in FIG. 1 . Heat pump systems work on the same principle.

In another case, in FIG. 2 , the first heat exchange channel is connected to the first pipeline 19, and the second heat exchange channel is connected to the second pipeline 20. At this time, the working principle of the heat pump system is obtained as shown in FIG. 3 (FIG. 3 Part of the structure on the side of the refrigeration circuit is omitted, and the structure on the side of the refrigeration circuit is the same as that in Figures 1 and 2).

Fig. 2 is the same as in Fig. 1, and a third heat exchanger 5 is also provided, and the function and working principle of the third heat exchanger 5 in Fig. 2 are also the same as those in Fig. 1 .

Wherein, a bypass pipe section may be connected in parallel with the third heat exchanger 5, and the bypass pipe section and one of the third heat exchange passages are selectively connected to each other. Furthermore, when one of the third heat exchange channels of the third heat exchanger 5 is disconnected by conducting the bypass pipe section, then the solution flowing out from the evaporation side does not exchange heat with the solution flowing out from the condensation side. . Taking Fig. 3 as an example, the solution flowing out from the first heat exchanger 12 flows through one of the third heat exchange channels, and the solution flowing out from the second heat exchanger 22 flows through the bypass pipe section, thereby preventing the solution from passing through the third heat exchange channel. Heat exchange takes place at the third heat exchanger 5 .

In FIG. 2 , a first valve 13 and a second valve 14 are respectively provided on the bypass pipe section and the third heat exchange channel on the left side. Obviously, the second valve 14 on the third heat exchange channel on the left can also be arranged on the third heat exchange channel on the right. At this time, the bypass pipe section where the first valve 13 is arranged is connected to the third heat exchange channel on the right. on. In addition, the current first valve 13 and the second valve 14 can also be replaced by a three-way valve, thereby realizing alternative conduction between the bypass pipe section and one of the third heat exchange channels.

In addition, in FIG. 2 , in order to achieve alternative conduction between the first spray device 11 and the first pipeline 19 , a third valve 15 is respectively provided at the inlet of the first pipeline 19 and the first spray device 11 . and the fourth valve 16 . Similarly, in order to achieve alternative conduction between the second spray device 21 and the second pipeline 20, a fifth valve 17 and a sixth valve are respectively provided at the inlets of the second pipeline 20 and the second spray device 21. Valve 18. Similarly, the current third valve 15 and the fourth valve 16 can also be replaced by a three-way valve, and the fifth valve 17 and the sixth valve 18 can be replaced by another three-way valve.

2 , the solution circulation unit further includes a first circulation pump 3 and a second circulation pump 4, the first circulation pump 3 is located between the first container 23 and the second spray device 21, and the second circulation pump 4 is located between the first container 23 and the second spray device 21. between the second container 24 and the first spray device 11 .

In FIG. 2 , when the first heat exchange channel is connected to the first spray device 11 and is disconnected from the first pipeline 19, and the second heat exchange channel and the second spray device 21 are connected to each other When the second pipelines 20 are disconnected, reference may be made to FIG. 1 for the pipeline connection of the heat pump system at this time. The first circulating pump 3 works so that the solution in the first container 23 passes through the third heat exchange channel and the second heat exchange channel in turn, and is finally sprayed by the second spray device 21 to the second heat exchanger 22, and It falls into the second container 24 via the second heat exchanger 22 . The second circulating pump 4 works so that the solution in the second container 24 passes through the third heat exchange channel and the first heat exchange channel in sequence, and is finally sprayed by the first spraying device 11 to the first heat exchanger 12, and passes through the first heat exchanger 12. A heat exchanger 12 falls into the first container 23 . In this case, the solution in the solution circulation unit flows through the first heat exchanger 12 and the second heat exchanger 22, and realizes the circulation of the solution.

In FIG. 2 , when the first heat exchange channel is connected to the first pipeline 19 and is disconnected from the first spray device 11 , and the second heat exchange channel is connected to the second pipeline 20 and is connected to the first spray device 11 . When the two spraying devices 21 are disconnected, the pipeline connection of the heat pump system at this time can refer to FIG. 3 . Wherein, the second circulating pump 4 works so that the solution circulates in the closed loop formed between the first heat exchange channel, the third heat exchange channel, the second heat exchange channel and the bypass pipe section.

Of course, the setting positions of the first circulating pump 3 and the second circulating pump 4 are not limited by FIG. 2 , as long as the solution circulation requirements are met.

Referring to FIGS. 1 and 2 , the refrigeration circuit includes a four-way reversing valve 8 , and the compressor 6 communicates with the first heat exchanger 12 and the second heat exchanger 22 through the four-way reversing valve. Furthermore, the refrigeration circuit can achieve cooling or heating conditions.

According to the embodiment of the present invention, the first heat exchanger 12 is correspondingly formed with a first air passage 9, and the air in the first air passage 9 is one of fresh air and exhaust air, or a mixture of fresh air and exhaust air.

In addition, a second air passage 10 is correspondingly formed at the second heat exchanger 22 , and the air in the second air passage 10 is one of fresh air and return air, or a mixture of fresh air and return air.

According to the embodiment of the present invention, the first air passage 9 and the first spray device 11 are in a counter-flow heat exchange or a cross-flow heat exchange. That is, the air in the first air passage 9 and the solution sprayed by the first spraying device 11 may be counter-current heat exchange or cross-flow heat exchange. Likewise, the second air passage 10 and the second spraying device 21 are in counter-flow heat exchange or cross-flow heat exchange.

The solution in the above solution circulation unit can be a salt solution, and of course any solution with hygroscopic properties disclosed in the prior art can also be used. Among them, the solution circulation unit is used to assist the refrigeration circuit to improve the energy efficiency of the heat pump system; and the first heat exchanger 12 and the second heat exchanger 22 are used to simultaneously perform direct expansion precooling and internal cooling moisture absorption for the solution, and preheat the solution. and internal heat regeneration, and free cooling in the form of sensible heat can be achieved in transitional seasons.

For the heat pump system in FIG. 2, when it is used for summer refrigeration and dehumidification, it is necessary to open the heat pump system compressor 6, open the second valve 14, the fourth valve 16 and the sixth valve 18, close the first valve 13, The third valve 15 and the fifth valve 17, open the first circulating pump 3 and the second circulating pump 4, and adjust the four-way reversing valve 8, so that the first heat exchanger 12 and the second heat exchanger 22 are heat pumps respectively System condenser and evaporator. At this time, the circulation of each medium in the heat pump system can refer to Figure 1:

The air to be treated in the second air passage 10 may be fresh air, return air, or a mixture of fresh air and return air. The air passes through the second heat exchange device 2, and is in direct contact with the low-temperature concentrated solution sprayed down by the second spray device 21 and the surface of the second heat exchanger 22. After heat and mass exchange, it becomes low-temperature, low-humidity air for air supply. . After the solution completes the air dehumidification process, it becomes a dilute solution and flows out of the second heat exchange device 2 . In addition, in the second heat exchange device 2, the refrigerant of the heat pump system passes through the second heat exchanger 22 to pre-cool the spray solution and cool the air-solution mixed fluid to be treated.

The air to be treated in the first air passage 9 may be one or a combination of fresh air and exhaust air. The air passes through the first heat exchange device 1 and directly contacts the high-temperature dilute solution sprayed down by the first spray device 11 and the surface of the first heat exchanger 12, and after heat and mass exchange, the air becomes high-temperature and high-humidity air and is discharged. After the solution completes the regeneration process, it becomes a concentrated solution and flows out of the first heat exchange device 1 . Moreover, in the first heat exchange device 1 , the refrigerant of the heat pump system preheats the spray solution and the temperature of the air-solution mixed fluid to be treated through the first heat exchanger 12 .

For the heat pump system in FIG. 2, when it is used for heating and humidifying in winter, it is necessary to open the compressor 6 of the heat pump system, open the second valve 14, the fourth valve 16 and the sixth valve 18, and close the first valve 13. , the third valve 15 and the fifth valve 17, open the first circulating pump 3, the second circulating pump 4, adjust the four-way reversing valve 8, so that the first heat exchanger 12 and the second heat exchanger 22 are heat pump systems respectively evaporator and condenser. At this time, the circulation of each medium in the heat pump system can also refer to Figure 1:

The air to be treated in the second air passage 10 may be fresh air, return air, or a mixture of fresh air and return air. The air passes through the second heat exchange device 2, and is in direct contact with the high-temperature dilute solution sprayed down by the second spray device 21 and the surface of the second heat exchanger 22. After heat and mass exchange, it becomes air with high temperature and high humidity for delivery. wind. After the solution completes the air humidification process, it becomes a concentrated solution and flows out of the second heat exchange device 2 . In addition, in the second heat exchange device 2 , the refrigerant of the heat pump system preheats the spray solution and the temperature of the air-solution mixed fluid to be treated through the second heat exchanger 22 .

The air to be treated in the first air passage 9 may be one or a combination of fresh air and exhaust air. The air is in direct contact with the low-temperature concentrated solution sprayed down by the first spray device 11 and the surface of the first heat exchanger 12, and after heat and mass exchange, the air becomes low-temperature and low-humidity air and is discharged. After the solution completes the moisture absorption process, it becomes a dilute solution and flows out of the first heat exchange device 1 . In addition, in the first heat exchange device 1 , the refrigerant of the heat pump system passes through the first heat exchanger 12 to pre-cool the spray solution and cool the air-solution mixed fluid to be treated.

For the heat pump system in Fig. 2, when it is used for free cooling in the transition season, it is necessary to close the heat pump system compressor 6, open the first valve 13, the third valve 15 and the fifth valve 17, and close the second valve. 14. The fourth valve 16 and the sixth valve 18, close the first circulation pump 3, open the second circulation pump 4, and only use the closed solution circulation system to complete the sensible heat exchange between the solution and the air. At this time, the circulation of each medium in the heat pump system can also refer to Figure 3:

The air to be treated in the second air passage 10 is indoor circulating air. The air is in direct contact with the surface of the second heat exchanger 22 , exchanges sensible heat with the low-temperature solution and then cools down, and the solution flows out of the second heat exchanger 22 after heating up. The air to be treated in the first air channel 9 is outdoor air, which is in direct contact with the surface of the first heat exchanger 12 , and exchanges sensible heat with a high-temperature solution to raise the temperature, and the solution flows out of the first heat exchanger 12 after cooling down.

The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present utility model has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications or equivalent replacements to the technical solutions of the present utility model are performed without departing from the spirit and scope of the technical solutions of the present utility model. All should be included in the scope of the claims of the present invention.

Claims (9)

1. A heat pump system comprising a refrigeration circuit, the refrigeration circuit comprising a compressor, a first heat exchanger, a throttling device and a second heat exchanger, characterized in that it further comprises:

a solution circulation unit;

the first heat exchanger and the second heat exchanger respectively comprise refrigerant heat exchange channels for the circulation of refrigerant in the refrigeration loop, the first heat exchanger comprises a first heat exchange channel for the circulation of solution in the solution circulation unit, and the second heat exchanger comprises a second heat exchange channel for the circulation of solution in the solution circulation unit;

the solution circulation unit includes:

the first spraying device is positioned above the first heat exchanger and communicated with the first heat exchange channel;

the second spraying device is positioned above the second heat exchanger and communicated with the second heat exchange channel;

the first containing container is positioned below the first spraying device, receives the solution flowing through the first heat exchanger and is communicated with the second heat exchange channel;

the second container is positioned below the second spraying device, receives the solution flowing through the second heat exchanger and is communicated with the first heat exchange channel;

the first spraying device and the second container are respectively communicated with the outlet end and the inlet end of the first heat exchange channel, and the second spraying device and the first container are respectively communicated with the outlet end and the inlet end of the second heat exchange channel.

2. The heat pump system according to claim 1, wherein a third heat exchanger is disposed in the solution circulating unit, the third heat exchanger includes two third heat exchange channels, and the two third heat exchange channels are respectively located between the first container and the second heat exchange channel, and between the second container and the first heat exchange channel.

3. The heat pump system according to claim 1, wherein an outlet end of the first heat exchange channel is communicated with an inlet end of the second heat exchange channel through a first pipeline, an outlet end of the second heat exchange channel is communicated with an inlet end of the first heat exchange channel through a second pipeline, and the outlet end of the first heat exchange channel is alternatively communicated with the first spray device or the first pipeline; and an outlet end of the second heat exchange channel is selected to conduct the second spraying device or the second pipeline.

4. The heat pump system according to claim 3, wherein a third heat exchanger is disposed in the solution circulating unit, the third heat exchanger includes two third heat exchange channels, and the two third heat exchange channels are respectively located between the first container and the second heat exchange channel, and between the second container and the first heat exchange channel; the first pipeline and the second pipeline respectively comprise different third heat exchange channels.

5. The heat pump system of claim 4, wherein the third heat exchanger is connected in parallel with a bypass section that is in alternative communication with one of the third heat exchange passages.

6. The heat pump system of claim 5, wherein the solution circulation unit comprises a first circulation pump and a second circulation pump, the first circulation pump being located between the first containment vessel and the second spray device, the second circulation pump being located between the second containment vessel and the first spray device.

7. The heat pump system of any one of claims 1 to 6, wherein the refrigeration circuit comprises a four-way reversing valve through which the compressor communicates the first and second heat exchangers.

8. The heat pump system according to any one of claims 1 to 6, wherein a first air channel is arranged on the first heat exchanger, and the air in the first air channel is fresh air and/or exhaust air; and a second air channel is arranged on the second heat exchanger, and the air of the second air channel is fresh air and/or return air.

9. The heat pump system of claim 8, wherein the first air passage is in counter-current or cross-current heat exchange with the first spray device; and countercurrent heat exchange or cross-flow heat exchange is performed between the second air channel and the second spraying device.

Images