Constant-temperature dehumidification fresh air system

Abstract

The utility model relates to the technical field of dehumidification, and discloses a constant-temperature dehumidification fresh air system. A reversing valve assembly; the outdoor heat exchanger communicates with the first reversing valve; the indoor heat exchange assembly comprises a first indoor heat exchanger and a second indoor heat exchanger, the first indoor heat exchanger is communicated with the outdoor heat exchanger, and an online throttling element is arranged between the outdoor heat exchanger and the first indoor heat exchanger; the heat recovery heat exchange assembly comprises a heat recovery heat exchanger and an auxiliary heat exchanger, and the heat recovery heat exchanger and the auxiliary heat exchanger both communicate with the second reversing valve. The first indoor heat exchanger, the second indoor heat exchanger and the auxiliary heat exchanger are arranged on a heat exchange air channel of the fresh air system so as to conduct heat exchange on fresh air flowing in from the outside. According to the constant-temperature dehumidification fresh air system, clean fresh air is provided for a user, and meanwhile the temperature and humidity of air are adjusted.

Description

Technical Field

[0001] This application relates to the field of air conditioning and dehumidification technology, for example, to a constant temperature dehumidification fresh air system. Background Technology

[0002] A fresh air system installed in a building is a key indoor environmental treatment device that can introduce fresh outdoor air into the room and exhaust stale indoor air to the outside, thereby providing clean fresh air to the user's indoor space.

[0003] The fresh air system includes a housing with outdoor fresh air inlet, indoor fresh air exhaust outlet, indoor stale air inlet, and outdoor stale air exhaust outlet. The housing is equipped with functional modules such as a cleaning filter to filter and clean the air flowing through the fresh air system, providing users with clean fresh air.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] When users are exchanging fresh air, they sometimes need to adjust the humidity of the indoor environment, such as the dehumidification needs during the humid season. However, existing fresh air systems cannot meet the users' dehumidification needs.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides a constant temperature and dehumidification fresh air system, comprising: a compressor including a first exhaust port, a second exhaust port, a first intake port, and a second intake port; a reversing valve assembly including a first reversing valve and a second reversing valve, the first reversing valve being connected to the first exhaust port and the first intake port, and the second reversing valve being connected to the second exhaust port and the second intake port; an outdoor heat exchanger connected to the first reversing valve; an indoor heat exchange assembly including a first indoor heat exchanger and a second indoor heat exchanger, the first indoor heat exchanger being connected to the outdoor heat exchanger, and a throttling element being provided between the outdoor heat exchanger and the first indoor heat exchanger; and a heat recovery heat exchange assembly including a heat recovery heat exchanger and an auxiliary heat exchanger, both of which are connected to the second reversing valve, wherein the first indoor heat exchanger, the second indoor heat exchanger, and the auxiliary heat exchanger are arranged in the heat exchange air path of the fresh air system to exchange heat with fresh air flowing in from the outside.

[0009] In some alternative embodiments, the first indoor heat exchanger and the second indoor heat exchanger are connected in series, and an indoor throttling element is provided between the first indoor heat exchanger and the second indoor heat exchanger; and / or, a heat recovery throttling element is provided between the heat recovery heat exchanger and the auxiliary heat exchanger.

[0010] In some alternative embodiments, the first directional valve includes a first four-way valve; and / or, the second directional valve includes a second four-way valve.

[0011] In some alternative embodiments, the constant temperature and dehumidification fresh air system further includes: a first solenoid valve disposed between the first exhaust port and the first reversing valve; and / or, a second solenoid valve disposed between the second exhaust port and the second reversing valve.

[0012] In some optional embodiments, the constant temperature and dehumidification fresh air system further includes: a housing, the housing having a first air inlet and a first air outlet, the first air inlet and the first air outlet forming a heat exchange air path, wherein a first indoor heat exchanger is disposed near the first air outlet and a second indoor heat exchanger is disposed near the first air inlet.

[0013] In some alternative embodiments, an auxiliary heat exchanger is disposed between the first indoor heat exchanger and the second indoor heat exchanger. The air entering from the first air inlet passes sequentially through the second indoor heat exchanger, the auxiliary heat exchanger, and the first indoor heat exchanger before flowing out from the first air outlet.

[0014] In some alternative embodiments, the housing is further provided with a second air inlet and a second air outlet, the second air inlet and the second air outlet forming a heat recovery air path, wherein the heat recovery heat exchanger is disposed between the second air inlet and the second air outlet.

[0015] In some alternative embodiments, the housing further includes an air duct baffle disposed between the heat exchange air duct and the heat recovery air duct.

[0016] In some optional embodiments, the constant temperature and dehumidification fresh air system further includes: a first controller configured to adjust the opening degree of the online throttling element to be greater than or equal to a first preset opening degree, and adjust the opening degree of the indoor throttling element and the heat recovery throttling element to be less than or equal to a second preset opening degree. The refrigerant discharged from the first exhaust port of the compressor flows into the first indoor heat exchanger for reheating after passing through the outdoor heat exchanger, and after being throttled by the indoor throttling element, it flows into the second indoor heat exchanger for dehumidification and then flows back to the compressor. The refrigerant discharged from the second exhaust port of the compressor flows into the auxiliary heat exchanger for reheating, and after being heat recovered by the heat recovery heat exchanger, it flows back to the compressor, so as to control the fresh air system to operate in the heating and dehumidification mode.

[0017] In some optional embodiments, the constant temperature and dehumidification fresh air system further includes: a second controller configured to adjust the opening degree of the online throttling element to be greater than or equal to a first preset opening degree, and to adjust the opening degree of the indoor throttling element and the heat recovery throttling element to be less than or equal to a second preset opening degree. The refrigerant discharged from the first exhaust port of the compressor flows into the first indoor heat exchanger for reheating after passing through the outdoor heat exchanger, and after being throttled by the indoor throttling element, it flows into the second indoor heat exchanger for dehumidification and then flows back to the compressor. The refrigerant discharged from the second exhaust port of the compressor flows into the heat recovery heat exchanger for heat recovery, and after being dehumidified by the auxiliary heat exchanger, it flows back to the compressor, so as to control the fresh air system to operate in constant temperature and dehumidification mode.

[0018] The constant temperature and dehumidification fresh air system provided in this embodiment can achieve the following technical effects:

[0019] The constant temperature and dehumidification fresh air system includes a compressor, a reversing valve assembly, an outdoor heat exchanger, an indoor heat exchange assembly, and a heat recovery heat exchange assembly. The compressor includes a first exhaust port, a second exhaust port, a first intake port, and a second intake port. The reversing valve assembly includes a first reversing valve and a second reversing valve; the first reversing valve is connected to the first exhaust port and the first intake port, and the second reversing valve is connected to the second exhaust port and the second intake port. The outdoor heat exchanger is connected to the first reversing valve. The indoor heat exchange assembly includes a first indoor heat exchanger and a second indoor heat exchanger; the first indoor heat exchanger is connected to the outdoor heat exchanger, and a throttling element is provided between the outdoor heat exchanger and the first indoor heat exchanger. The heat recovery heat exchange assembly includes a heat recovery heat exchanger and an auxiliary heat exchanger, both of which are connected to the second reversing valve. The first indoor heat exchanger, the second indoor heat exchanger, and the auxiliary heat exchanger are located in the heat exchange air path of the fresh air system, and the heat recovery heat exchanger is located in the heat recovery air path of the fresh air system.

[0020] As can be seen, the constant temperature dehumidification fresh air system provided in this embodiment includes a heat exchange air path and a heat recovery air path. The first indoor heat exchanger, the second indoor heat exchanger, and the auxiliary heat exchanger in the heat exchange air path can function as evaporators or condensers as needed. For example, when the constant temperature dehumidification fresh air system operates in the heating and dehumidification mode, the second indoor heat exchanger acts as an evaporator for dehumidification, while the first indoor heat exchanger and the auxiliary heat exchanger both act as condensers to reheat the dehumidified air, thus achieving heating and dehumidification.

[0021] The constant temperature and dehumidification fresh air system provided in this embodiment not only provides clean fresh air to users, but also regulates the humidity and temperature of the user's indoor environment to meet the user's needs.

[0022] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0023] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0024] Figure 1 This is a schematic diagram of a constant temperature dehumidification fresh air system provided in an embodiment of this disclosure;

[0025] Figure 2 This is a schematic diagram of another constant temperature dehumidification fresh air system provided in an embodiment of this disclosure;

[0026] Figure 3 This is a schematic diagram of the refrigerant flow path in the heating and dehumidification mode of a constant temperature dehumidification fresh air system provided in this embodiment of the disclosure;

[0027] Figure 4 This is a schematic diagram of the refrigerant flow path of a constant temperature dehumidification fresh air system in constant temperature dehumidification mode, provided in an embodiment of this disclosure;

[0028] Figure 5 This is a schematic diagram of the refrigerant flow path in the cooling mode of a constant temperature dehumidification fresh air system provided in this embodiment of the disclosure;

[0029] Figure 6 This is a schematic diagram of the refrigerant flow path in the heating mode of a constant temperature dehumidification fresh air system provided in this embodiment.

[0030] Figure label:

[0031] 1: Compressor; 11: First exhaust port; 12: Second exhaust port; 13: First intake port; 14: Second intake port;

[0032] 21: First directional control valve; 22: Second directional control valve;

[0033] 31: Outdoor heat exchanger; 32: Online throttling element;

[0034] 41: First indoor heat exchanger; 42: Second indoor heat exchanger; 43: Indoor throttling element;

[0035] 51: Heat recovery heat exchanger; 52: Auxiliary heat exchanger; 53: Heat recovery throttling element;

[0036] 101: Heat exchange air path; 102: Heat recovery air path. Detailed Implementation

[0037] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0038] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for describing embodiments of this disclosure herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0039] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0040] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0041] Unless otherwise stated, the term "multiple" means two or more.

[0042] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0043] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0045] This disclosure provides a constant temperature and dehumidification fresh air system. For example... Figures 1 to 6 As shown.

[0046] Optionally, the constant temperature and dehumidification fresh air system includes: compressor 1, reversing valve assembly, outdoor heat exchanger 31, indoor heat exchange assembly and heat recovery heat exchange assembly. The compressor 1 includes a first exhaust port 11, a second exhaust port 12, a first intake port 13, and a second intake port 14; the reversing valve assembly includes a first reversing valve 21 and a second reversing valve 22, the first reversing valve 21 being connected to the first exhaust port 11 and the first intake port 13, and the second reversing valve 22 being connected to the second exhaust port 12 and the second intake port 14; the outdoor heat exchanger 31 is connected to the first reversing valve 21; the indoor heat exchange assembly includes a first indoor heat exchanger 41 and a second indoor heat exchanger 42, the first indoor heat exchanger 41 being connected to the outdoor heat exchanger 31, and a connecting throttling element 32 is provided between the outdoor heat exchanger 31 and the first indoor heat exchanger 41; the heat recovery heat exchange assembly includes a heat recovery heat exchanger 51 and an auxiliary heat exchanger 52, and both the heat recovery heat exchanger 51 and the auxiliary heat exchanger 52 are connected to the second reversing valve 22.

[0047] The first indoor heat exchanger 41, the second indoor heat exchanger 42 and the auxiliary heat exchanger 52 are installed in the heat exchange air passage 101 of the fresh air system, the heat recovery heat exchanger 51 is installed in the heat recovery air passage 102 of the fresh air system, and the heat exchange air passage 101 is used to exchange heat with the fresh air flowing in from the outside.

[0048] Understandable, Figure 2 In the diagram, the arrows inside the dashed box indicate the direction of the indoor crosswind, while the arrows outside the dashed box indicate the direction of the outdoor crosswind.

[0049] This disclosure provides a constant temperature and dehumidification fresh air system, which includes a heat exchange air path 101 for exchanging heat with fresh air flowing in from the outside. The heat exchange air path 101 includes a first indoor heat exchanger 41, a second indoor heat exchanger 42, and an auxiliary heat exchanger 52. When the fresh air system operates in dehumidification mode, the second indoor heat exchanger 42 can act as an evaporator for dehumidification, while the first indoor heat exchanger 41 and the auxiliary heat exchanger 52 can act as condensers to reheat the dehumidified air, achieving both temperature-raising and dehumidification. Figure 3 As shown.

[0050] As can be seen, the constant temperature and dehumidification fresh air system provided in this embodiment not only provides clean fresh air to users, but also regulates the humidity and temperature of the fresh air flowing in from the outside, thus meeting the user's needs for the temperature and humidity of the fresh air.

[0051] Optionally, the compressor 1 provided in this embodiment is a double-suction, double-row compressor, which has two exhaust ports and two intake ports. The first exhaust port 11, the first reversing valve 21, the outdoor heat exchanger 31, the first indoor heat exchanger 41, the second indoor heat exchanger 42, and the first intake port 13 form one refrigerant flow path; the second exhaust port 12, the second reversing valve 22, the heat recovery heat exchanger 51, the auxiliary heat exchanger 52, and the second intake port 14 form another refrigerant flow path. According to user needs, by adjusting the connection state of the first reversing valve 21 and the second reversing valve 22, the fresh air system can achieve different operating modes such as cooling, heating, temperature-raising dehumidification, and constant-temperature dehumidification.

[0052] Optionally, the fresh air system is equipped with filter elements and purification elements for filtering fresh air to provide clean fresh air to users.

[0053] Optionally, the first indoor heat exchanger 41, the second indoor heat exchanger 42, the heat recovery heat exchanger 51, or the auxiliary heat exchanger 52 can be copper tube finned heat exchangers, microchannel heat exchangers, etc.

[0054] Optionally, the heat exchange area of ​​the first indoor heat exchanger 41 and the second indoor heat exchanger 42 is the same; similarly, the heat recovery heat exchanger 51 and the auxiliary heat exchanger 52 have the same heat exchange area.

[0055] Optionally, the first indoor heat exchanger 41, the second indoor heat exchanger 42, and the auxiliary heat exchanger 52 include a windward heat exchange surface and a leeward heat exchange surface through which the air passes, wherein the heat exchange area of ​​the windward heat exchange surface of the first indoor heat exchanger 41, the second indoor heat exchanger 42, and the auxiliary heat exchanger 52 is the same. This facilitates the sequential flow of fresh outdoor air through the second indoor heat exchanger 42, the auxiliary heat exchanger 52, and the first indoor heat exchanger 41.

[0056] Optionally, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 are connected in series, and an indoor throttling element 43 is provided between the first indoor heat exchanger 41 and the second indoor heat exchanger 42; and / or, a heat recovery throttling element 53 is provided between the heat recovery heat exchanger 51 and the auxiliary heat exchanger 52.

[0057] The indoor throttling element 43 can be an electronic expansion valve with adjustable throttling degree. The indoor throttling element 43, which is set between the first indoor heat exchanger 41 and the second indoor heat exchanger 42, can adjust the temperature of the refrigerant flowing out of the first indoor heat exchanger 41 and then into the second indoor heat exchanger 42 by adjusting the opening degree of the indoor throttling element 43.

[0058] Similarly, the heat recovery throttling element 53 can be an electronic expansion valve with adjustable throttling degree. The heat recovery throttling element 53, which is set between the heat recovery heat exchanger 51 and the auxiliary heat exchanger 52, can adjust the temperature of the refrigerant flowing out of the heat recovery heat exchanger 51 and re-flowing into the auxiliary heat exchanger 52, or adjust the temperature of the refrigerant flowing out of the auxiliary heat exchanger 52 and re-flowing into the heat recovery heat exchanger 51 by adjusting the opening degree of the heat recovery throttling element 53.

[0059] Optionally, the first directional valve 21 includes a first four-way valve, and similarly, the second directional valve 22 includes a second four-way valve.

[0060] Optionally, the constant temperature and dehumidification fresh air system also includes a first solenoid valve, which is located between the first exhaust port 11 and the first reversing valve 21 to adjust the amount of refrigerant discharged by the compressor 1 from the first exhaust port 11.

[0061] Optionally, the constant temperature and dehumidification fresh air system also includes a second solenoid valve, which is located between the second exhaust port 12 and the second reversing valve 22 to regulate the amount of refrigerant discharged by the compressor 1 from the second exhaust port 12.

[0062] The opening degree of the first and second solenoid valves can be adjusted according to the user's needs for temperature and humidity regulation.

[0063] Optionally, the constant temperature and dehumidification fresh air system also includes a housing, which has a first air inlet and a first air outlet, forming a heat exchange air path 101. The first indoor heat exchanger 41 is positioned near the first air outlet, and the second indoor heat exchanger 42 is positioned near the first air inlet. Figure 2 As shown.

[0064] Optionally, the first air inlet is an outdoor fresh air inlet, and the first air outlet is an indoor fresh air outlet. A fresh air intake passage is formed between the first air inlet and the first air outlet, and this fresh air intake passage has the functions of temperature regulation and humidity regulation, also known as heat exchange air passage 101.

[0065] Optionally, a filter screen is provided at the first air inlet to filter the outdoor fresh air; alternatively, a guide vane or air supply grille is provided at the first air outlet to adjust the air volume and air outlet angle of the first air outlet.

[0066] Optionally, the auxiliary heat exchanger 52 is disposed between the first indoor heat exchanger 41 and the second indoor heat exchanger 42. The air entering from the first air inlet passes through the second indoor heat exchanger 42, the auxiliary heat exchanger 52 and the first indoor heat exchanger 41 in sequence, and then flows out from the first air outlet.

[0067] The auxiliary heat exchanger 52 is located between the first indoor heat exchanger 41 and the second indoor heat exchanger 42. In this way, the outdoor fresh air entering from the first air inlet can be regulated in temperature and humidity by passing through the second indoor heat exchanger 42, the auxiliary heat exchanger 52 and the first indoor heat exchanger 41 in sequence, and finally flows out from the first air outlet, which serves as the indoor fresh air outlet.

[0068] Optionally, the housing is also provided with a second air inlet and a second air outlet, the second air inlet and the second air outlet forming a heat recovery air path 102, wherein the heat recovery heat exchanger 51 is disposed between the second air inlet and the second air outlet.

[0069] Optionally, the second air inlet is an indoor stale air inlet, and the second air outlet is an outdoor stale air outlet. In this way, when the fresh air system exhausts indoor stale air to the outside, the heat recovery heat exchanger 51 installed in the air duct can recover indoor heat.

[0070] Optionally, the housing also includes an air duct baffle, disposed between the heat exchange air duct 101 and the heat recovery air duct 102.

[0071] The duct partition installed in the heat exchange air passage 101 and the heat recovery air passage 102 can separate the heat exchange air passage 101 and the heat recovery air passage 102, so that the heat exchange air passage 101 and the heat recovery air passage 102 can better play their respective roles.

[0072] Optionally, the constant temperature and dehumidification fresh air system also includes a first controller, configured to adjust the opening degree of the online throttling element 32 to be greater than or equal to a first preset opening degree, and adjust the opening degree of the indoor throttling element 43 and the heat recovery throttling element 53 to be less than or equal to a second preset opening degree. The refrigerant discharged from the first exhaust port 11 of the compressor 1 flows into the first indoor heat exchanger 41 for reheating after passing through the outdoor heat exchanger 31. After being throttled by the indoor throttling element 43, it flows into the second indoor heat exchanger 42 for dehumidification and then flows back to the compressor 1. The refrigerant discharged from the second exhaust port 12 of the compressor 1 flows into the auxiliary heat exchanger 52 for reheating and then undergoes heat recovery through the heat recovery heat exchanger 51 before flowing back to the compressor 1, so as to control the fresh air system to operate in the heating and dehumidification mode.

[0073] like Figure 3As shown, under the condition of humid weather, when the fresh air system is controlled to operate in the heating and dehumidification mode, the first four-way valve is connected with ports d and s, and ports e and c. The second four-way valve is connected with ports d and e, and ports s and c. The high-pressure exhaust of compressor 1 flows through the first exhaust port 11, through the first four-way valve, into the outdoor heat exchanger 31 for condensation and heat release. The opening of the online throttling element 32 is adjusted to the maximum opening. After entering the first indoor heat exchanger 41, the air continues to condense and reheat. After being throttled by the indoor throttling element 43, which plays a throttling role, the air flows into the second indoor heat exchanger 42 for evaporation and dehumidification. Finally, it flows back to compressor 1 from the first four-way valve through the first intake port 13. The high-pressure exhaust from compressor 1 flows through the second exhaust port 12 and the second four-way valve to the auxiliary heat exchanger 52, where it condenses and releases heat to reheat the air. The refrigerant flows into the heat recovery heat exchanger 51 after being throttled by the heat recovery throttling element 53, where it evaporates and absorbs heat to recover the heat from the indoor exhaust air. Finally, it flows back to compressor 1 from the second four-way valve through the second intake port 14.

[0074] It can be seen that when the fresh air system is running in the heating and dehumidification mode, both the first indoor heat exchanger 41 and the auxiliary heat exchanger 52 act as condensers to reheat the dehumidified air, thus achieving heating during the dehumidification process.

[0075] Optionally, the constant temperature and dehumidification fresh air system also includes a second controller, configured to adjust the opening degree of the online throttling element 32 to be greater than or equal to the first preset opening degree, and adjust the opening degree of the indoor throttling element 43 and the heat recovery throttling element 53 to be less than or equal to the second preset opening degree. The refrigerant discharged from the first exhaust port 11 of the compressor 1 flows into the first indoor heat exchanger 41 for reheating after passing through the outdoor heat exchanger 31. After being throttled by the indoor throttling element 43, it flows into the second indoor heat exchanger 42 for dehumidification and then flows back to the compressor 1. The refrigerant discharged from the second exhaust port 12 of the compressor 1 flows into the heat recovery heat exchanger 51 for heat recovery and then is dehumidified by the auxiliary heat exchanger 52 before flowing back to the compressor 1, so as to control the fresh air system to operate in constant temperature and dehumidification mode.

[0076] like Figure 4As shown, under other dehumidification conditions where the reheat demand is not high, the fresh air system can be controlled to operate in a constant temperature dehumidification mode. The e and c ports of the first four-way valve and the second four-way valve are connected, and the d and s ports are connected. The high-pressure exhaust from compressor 1 flows through the first exhaust port 11, through the first four-way valve, into the outdoor heat exchanger 31 for condensation and heat release. The opening of the online throttling element 32 is adjusted to the maximum opening, and the air enters the first indoor heat exchanger 41 for further condensation and reheating. After being throttled by the indoor throttling element 43, which plays a throttling role, the air flows into the second indoor heat exchanger 42 for evaporative dehumidification. Finally, the air flows back to compressor 1 from the first four-way valve through the first suction port 13. The high-pressure exhaust from compressor 1 flows through the second exhaust port 12 and the second four-way valve to the heat recovery heat exchanger 51, where it condenses and releases heat to reheat the air. The refrigerant flows into the auxiliary heat exchanger 52 after being throttled by the heat recovery throttling element 53, where it evaporates and absorbs heat to recover the heat from the indoor exhaust air. Finally, it flows back to compressor 1 from the second four-way valve through the second intake port 14.

[0077] It can be seen that when the fresh air system is running in constant temperature dehumidification mode, the first indoor heat exchanger 41 acts as a condenser to reheat the dehumidified air, which can be used when the temperature rise requirement during the dehumidification process is not high.

[0078] Optionally, the fresh air system provided in this embodiment can also operate in a cooling mode. For example... Figure 5 As shown, the d and s ports of the first four-way valve and the second four-way valve are connected, and the e and c ports are connected. One path of the high-pressure exhaust from compressor 1 flows through the first exhaust port 11 and into the outdoor heat exchanger 31 for condensation and heat release. After being throttled by the online throttling element 32, it enters the first indoor heat exchanger 41 and the second indoor heat exchanger 42 for evaporation and heat absorption, cooling the intake air, and finally flows back to compressor 1. At this time, the opening of the indoor throttling element 43 is adjusted to the maximum. Another path of the high-pressure exhaust from compressor 1 flows to the heat recovery heat exchanger 51, using the indoor exhaust air to cool the high-temperature refrigerant. After being throttled by the heat recovery throttling element 53, the refrigerant flows into the auxiliary heat exchanger 52 for evaporation and heat absorption, cooling the outdoor exhaust air to the indoor air, and finally flows back to compressor 1.

[0079] Optionally, the fresh air system provided in this disclosure embodiment can also operate in heating mode. For example... Figure 6 As shown, the first four-way valve and the second four-way valve are connected at ports d and e, and at ports s and c. One path of the high-pressure exhaust from compressor 1 flows into the second indoor heat exchanger 42 and the first indoor heat exchanger 41, where it condenses and releases heat. After being throttled by the connecting throttling element 32, it flows into the outdoor heat exchanger 31 for evaporation and heat absorption, and finally returns to compressor 1. At this time, the opening of the indoor throttling element 43 is adjusted to its maximum. Another path of the high-pressure exhaust from compressor 1 flows to the auxiliary heat exchanger 52, where it condenses and releases heat. The refrigerant, after being throttled by the heat recovery throttling element 53, flows into the heat recovery heat exchanger 51, where it evaporates and absorbs heat, recovering the heat gained from the indoor exhaust air, and finally returns to compressor 1.

[0080] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A constant temperature and dehumidification fresh air system, characterized in that, include: The compressor includes a first exhaust port, a second exhaust port, a first intake port, and a second intake port; A reversing valve assembly includes a first reversing valve and a second reversing valve, wherein the first reversing valve is connected to a first exhaust port and a first intake port, and the second reversing valve is connected to a second exhaust port and a second intake port. The outdoor heat exchanger is connected to the first reversing valve; The indoor heat exchange assembly includes a first indoor heat exchanger and a second indoor heat exchanger. The first indoor heat exchanger is connected to an outdoor heat exchanger, and an interconnecting throttling element is provided between the outdoor heat exchanger and the first indoor heat exchanger. The heat recovery heat exchange assembly includes a heat recovery heat exchanger and an auxiliary heat exchanger, and both the heat recovery heat exchanger and the auxiliary heat exchanger are connected to a second reversing valve. The first indoor heat exchanger, the second indoor heat exchanger, and the auxiliary heat exchanger are installed in the heat exchange air path of the fresh air system to dehumidify or exchange heat for the fresh air flowing in from the outside.

2. The constant temperature and dehumidification fresh air system according to claim 1, characterized in that, The first indoor heat exchanger and the second indoor heat exchanger are connected in series, and an indoor throttling element is provided between the first indoor heat exchanger and the second indoor heat exchanger; and / or, A heat recovery throttling element is installed between the heat recovery heat exchanger and the auxiliary heat exchanger.

3. The constant temperature and dehumidification fresh air system according to claim 1, characterized in that, The first directional valve includes a first four-way valve; and / or, The second directional valve includes a second four-way valve.

4. The constant temperature and dehumidification fresh air system according to claim 1, characterized in that, Also includes: A first solenoid valve is disposed between the first exhaust port and the first directional valve; and / or, The second solenoid valve is located between the second exhaust port and the second directional valve.

5. The constant temperature and dehumidification fresh air system according to claim 1, characterized in that, Also includes: The casing has a first air inlet and a first air outlet, which together form a heat exchange air path. The first indoor heat exchanger is located near the first air outlet, and the second indoor heat exchanger is located near the first air inlet.

6. The constant temperature and dehumidification fresh air system according to claim 5, characterized in that, An auxiliary heat exchanger is located between the first indoor heat exchanger and the second indoor heat exchanger. Air entering from the first air inlet passes sequentially through the second indoor heat exchanger, the auxiliary heat exchanger, and the first indoor heat exchanger before flowing out from the first air outlet.

7. The constant temperature and dehumidification fresh air system according to claim 5, characterized in that, The casing also has a second air inlet and a second air outlet, which together form a heat recovery air path. The heat recovery heat exchanger is located between the second air inlet and the second air outlet.

8. The constant temperature and dehumidification fresh air system according to claim 7, characterized in that, The housing also includes: The air duct baffle is installed between the heat exchange air duct and the heat recovery air duct.

9. The constant temperature and dehumidification fresh air system according to any one of claims 1 to 8, characterized in that, Also includes: The first controller is configured to adjust the opening of the online throttling element to be greater than or equal to the first preset opening, and adjust the opening of the indoor throttling element and the heat recovery throttling element to be less than or equal to the second preset opening. The refrigerant discharged from the first discharge port of the compressor flows into the first indoor heat exchanger for reheating after passing through the outdoor heat exchanger. After passing through the throttling effect of the indoor throttling element, it flows into the second indoor heat exchanger for dehumidification and then flows back to the compressor. The refrigerant discharged from the second exhaust port of the compressor flows into the auxiliary heat exchanger for reheating, then undergoes heat recovery through the heat recovery heat exchanger, and finally flows back to the compressor to control the operation of the fresh air system in the heating and dehumidification mode.

10. The constant temperature and dehumidification fresh air system according to claim 9, characterized in that, Also includes: The second controller is configured to adjust the opening of the online throttling element to be greater than or equal to the first preset opening, and to adjust the opening of the indoor throttling element and the heat recovery throttling element to be less than or equal to the second preset opening. The refrigerant discharged from the first exhaust port of the compressor flows into the first indoor heat exchanger for reheating after passing through the outdoor heat exchanger. After being throttled by the indoor throttling element, it flows into the second indoor heat exchanger for dehumidification and then flows back to the compressor. The refrigerant discharged from the second exhaust port of the compressor flows into the heat recovery heat exchanger for heat recovery and then is dehumidified by the auxiliary heat exchanger before flowing back to the compressor, thereby controlling the fresh air system to operate in a constant temperature and dehumidification mode.

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