Heat exchange system of fresh air all-in-one machine

Abstract

The utility model discloses a heat exchange system of a fresh air all-in-one machine, and belongs to the technical field of heat exchange. The air conditioner comprises an indoor unit device and an outdoor unit device. The indoor unit device communicates with the outdoor unit device through a first pipeline, a second pipeline and a third pipeline so that a first working medium in the outdoor unit device can flow into the indoor unit device from two of the first pipeline, the second pipeline and the third pipeline and return to the outdoor unit device from the indoor unit device through the other pipeline. The indoor unit device comprises an evaporator and a reheating coil, the evaporator is arranged on the first pipeline, and the reheating coil is arranged on the second pipeline. The radiation temperature adjusting unit is arranged in the outdoor unit device, the first throttling device is arranged on the pipeline between the three-way valve in the outdoor unit device and the radiation temperature adjusting unit, and the first throttling device is matched with the second throttling device in the system pipeline to achieve reasonable distribution of refrigerants in the pipeline. The accuracy of temperature control of the wind side and the radiation tail end is ensured, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the technical field of heat exchange, and more specifically, to a heat exchange system for a fresh air integrated machine. Background Art

[0002] As people's requirements for the quality of life are getting higher and higher. At present, the fresh air integrated machine has become a purification device selected by people. The fresh air integrated machine can first dehumidify and cool the outdoor air after filtration, then humidify it to meet the controllable humidity requirements, and finally heat it up further to make the room temperature reach the required level, making the indoor body feeling more comfortable.

[0003] However, in the prior art, when designing the pipeline arrangement of the indoor unit of the fresh air integrated machine, generally, the refrigerant flowing through the evaporator is split into two parts. One part passes through the reheating coil to the outdoor condenser, and the other part directly passes through the outdoor condenser. Therefore, when the high-temperature and high-pressure liquid refrigerant flowing out of the evaporator heats the fresh air through the reheating coil, a reheating coil with a larger volume is required, which undoubtedly increases the manufacturing cost of the indoor unit. At the same time, the volume of the indoor unit must also increase accordingly. If the indoor unit is too large, it cannot meet the decoration needs of small-sized houses.

[0004] For example, in Chinese Patent: A Dehumidifying Fresh Air Machine with Reheating (Publication No. CN112107339A), the disclosed fresh air machine includes an indoor unit part, an outdoor unit part, and a connection part. The indoor unit part and the outdoor unit part are interconnected through the connection part. The indoor unit part includes a first path component, a second path component, and an evaporator. The first path component and the second path component are interconnected. The first path component includes a solenoid valve, a reheating coil, an auxiliary electronic expansion valve, and a check valve. The solenoid valve is connected in series with the input end of the reheating coil. The auxiliary electronic expansion valve is connected in series with the output end of the reheating coil. The check valve is connected to the reheating coil. By the mutual cooperation of each component, the fresh air is dehumidified and heated. The evaporator and the filter screen are used to purify and heat the fresh air. By the mutual cooperation of the first path component, the second path component, and the internal refrigerant, the temperature of the fresh air is adjusted.

[0005] Therefore, how to reasonably arrange the pipeline system of the fresh air integrated machine in a limited space so that it can efficiently control the temperature and humidity of the fresh air and the indoor temperature is an urgent problem to be solved. Summary of the Invention

[0006] This part of the content of this application is used to briefly introduce ideas, which will be described in detail in the subsequent detailed implementation part. This part of the content of this application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0007] Some embodiments of the present application propose a heat exchange system for a fresh air integrated machine to solve the technical problems mentioned in the above background art section.

[0008] As a first aspect of the present application, some embodiments of the present application provide a heat exchange system for a fresh air integrated machine, including an indoor unit device and an outdoor unit device. The outdoor unit device includes a compressor, an outdoor condenser, a radiation temperature control unit, a four-way valve, and a first throttling device. The outlet and inlet of the compressor are respectively connected to the D port and S port of the four-way valve. The E port of the four-way valve is connected to the outdoor condenser through a pipeline. One end of the outdoor condenser is connected with a third pipeline. A three-way valve is provided at point A of the third pipeline. One interface of the three-way valve is connected to the radiation temperature control unit, and the other interface of the three-way valve is connected to the indoor unit device. A first throttling device is provided on the pipeline between the three-way valve and the radiation temperature control unit.

[0009] Among them, the radiation temperature control unit includes a temperature control heat exchanger. The temperature control heat exchanger includes a first working port, a second working port, a third working port, and a fourth working port. The first working port is connected to the three-way valve through a first radiation pipeline. The second working port is connected to the C port of the four-way valve through a first radiation pipeline. The third working port and the fourth working port are externally connected to radiation terminals through a second radiation pipeline.

[0010] The indoor unit device includes an evaporator, a reheating coil, and a second throttling device. The first exchange port of the evaporator is connected to the C port of the four-way valve through a first pipeline. The second exchange port of the evaporator is connected to the outdoor condenser through a third pipeline. The reheating coil includes a third exchange port and a fourth exchange port. The third exchange port is connected to the pipeline between the compressor and the D port of the four-way valve through a second pipeline. The fourth exchange port is connected to the outdoor condenser through a third pipeline. A second throttling device is provided on the pipeline between the second exchange port of the evaporator and point A of the third pipeline.

[0011] Further, a third throttling device is provided in the indoor unit device, and the third throttling device is arranged between the fourth exchange port of the reheating coil and the third pipeline.

[0012] Further, a fourth throttling device and a check valve are provided on the third pipeline connected to the end of the outdoor condenser far from the four-way valve. The check valve and the fourth throttling device are arranged in parallel.

[0013] Further, the outdoor unit device further includes a liquid storage tank, and the liquid storage tank is arranged between the three-way valve on the third pipeline and the fourth throttling device.

[0014] Further, the four-way valve has a first switching state. When the four-way valve is in the first switching state, the flow direction of the first working medium is from the compressor to the outdoor condenser and then to the evaporator.

[0015] Further, the four-way valve also has a second switching state. When the four-way valve is in the second switching state, the flow direction of the first working medium is from the compressor to the evaporator and then to the outdoor condenser.

[0016] Further, the radiation temperature control unit further includes a water pump, which is arranged on the second radiation pipeline to control the flow rate of the second working medium in the fifth pipeline.

[0017] Further, the radiation temperature control unit further includes a supply water thermometer, which is arranged on the second radiation pipeline.

[0018] Further, an exhaust pipe is provided between the outlet of the compressor and the four-way valve, and an exhaust switch, an exhaust pressure gauge and an exhaust thermometer are arranged on the exhaust pipe.

[0019] Further, the outdoor condenser and the evaporator are finned tube heat exchangers; the reheating coil is a coil heat exchanger; the temperature control heat exchanger is a plate heat exchanger.

[0020] Further, air-side thermometers are arranged on one side of both the evaporator and the reheating coil.

[0021] As a second aspect of the present application, some embodiments of the present application provide a heat exchange system for a fresh air integrated machine, including: an indoor unit device and an outdoor unit device, the outdoor unit device includes a compressor, an outdoor condenser, a radiation temperature control unit, a four-way valve, and a first throttling device. The outlet and inlet of the compressor are respectively connected to port D and port S of the four-way valve. Port E of the four-way valve is connected to the outdoor condenser through a pipeline. One end of the outdoor condenser is connected to a third pipeline. A three-way valve is provided at point A of the third pipeline. One interface of the three-way valve is connected to the radiation temperature control unit, and the other interface of the three-way valve is connected to the indoor unit device. A first throttling device is provided on the pipeline between the three-way valve and the radiation temperature control unit. Among them, the radiation temperature control unit includes a temperature control heat exchanger, and the temperature control heat exchanger includes a first working port, a second working port, a third working port, and a fourth working port. The first working port is connected to the three-way valve through a first radiation pipeline, the second working port is connected to port C of the four-way valve through a first radiation pipeline, and the third working port and the fourth working port are externally connected to radiation terminals through a second radiation pipeline. Among them, the first throttling device is used to adjust the temperature of the working medium passing through the temperature control heat exchanger by changing the valve diameter of the first throttling device itself according to the received control signal. The heat exchange system of the fresh air integrated machine further includes: a second throttling device, which is used to adjust the temperature of the working medium passing through the evaporator and / or the reheating coil by changing the valve diameter of the second throttling device itself according to the received control signal; a water supply thermometer, which is used to obtain the temperature of the radiation terminal; an air side thermometer, which is used to obtain the fresh air temperature of the indoor unit; a control device, which is used to send control signals to the first throttling device and / or the second throttling device according to the control signals sent by the water supply thermometer and / or the air side thermometer to control the first throttling device and / or the second throttling device.

[0022] Further, the indoor unit device includes an evaporator, a reheating coil, and a second throttling device. The first exchange port of the evaporator is connected to port C of the four-way valve through a first pipeline. The second exchange port of the evaporator is connected to the outdoor condenser through a third pipeline. The reheating coil includes a third exchange port and a fourth exchange port. The third exchange port is connected to the pipeline between the compressor and port D of the four-way valve through a second pipeline. The fourth exchange port is connected to the outdoor condenser through a third pipeline. A second throttling device is provided on the pipeline between the second exchange port of the evaporator and point A of the third pipeline.

[0023] Further, the outdoor unit device further includes a liquid storage tank, a fourth throttling device, and a check valve. The fourth throttling device and the check valve are connected in parallel on the third pipeline. The four-way valve, the outdoor condenser, the fourth throttling valve or the check valve, and the liquid storage tank are arranged in sequence on the third pipeline.

[0024] Compared with the prior art, the technical solution provided by this application has the following beneficial effects:

[0025] (1) In the present application, the radiation temperature control unit is arranged in the external device, and a first throttling device is provided on the pipeline between the three-way valve in the external device and the radiation temperature control unit, which cooperates with the second throttling device in the system pipeline to realize the reasonable distribution of the refrigerant in the pipeline, thereby ensuring the accuracy of temperature control on the wind side and the radiation end, and improving the user experience.

[0026] (2) In the present application, a first throttling device is provided on the pipe between the three-way valve of the outdoor device and the radiation temperature control unit. By controlling the first throttling device, the radiation temperature control unit can be made relatively independent relative to the outdoor device and the indoor device. When the user adjusts the temperature of the fresh air end, the temperature change amplitude of the radiation end is small, thereby achieving a better user experience effect of low temperature difference.

[0027] (3) The present application connects the evaporator and the reheat coil in parallel to the outdoor unit through the first pipeline and the second pipeline. The reasonable pipeline layout allows the high-temperature and high-pressure gaseous refrigerant directly flowing out from the outlet of the outdoor unit compressor to flow directly through the reheat coil, causing the working fluid passing through the reheat coil to undergo a physical change. Therefore, the required volume is smaller, thereby reducing the volume of the indoor unit of the fresh air integrated unit.

[0028] (4) The present application sets the second throttling device in the internal unit, so that one external unit can be connected to multiple internal units to meet a variety of different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a part of this application are used to provide a further understanding of this application and make other features, purposes and advantages of this application more apparent. The drawings and descriptions of the exemplary embodiments of this application are used to explain this application and do not constitute an improper limitation on this application.

[0030] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the elements and components are not necessarily drawn to scale.

[0031] Figure 1 This is a schematic diagram of the overall structure of a heat exchange system of a fresh air integrated machine according to an embodiment of the present application;

[0032] Figure 2 This is a structural diagram of a heat exchange system of a fresh air integrated machine in cooling mode according to an embodiment of the present application;

[0033] Figure 3 This is a structural diagram of a heat exchange system of a fresh air integrated machine in heating mode according to an embodiment of the present application;

[0034] Description of the reference numerals in the schematic diagram:

[0035] 100, outdoor unit device; 110, compressor; 111, outlet for pledging; 112, inlet for pledging; 120, outdoor condenser; 130, radiation regulation unit; 131, temperature regulating heat exchanger; 1311, first working port; 1312, second working port; 1313, third working port; 1314, fourth working port; 132, first radiation pipe; 133, second radiation pipe; 134, water pump; 135, water supply thermometer; 140, four-way valve; 150, first throttling device; 160, three-way valve; 170, liquid storage tank; 180, fourth throttling device; 190, check valve;

[0036] 200, indoor unit device; 210, evaporator; 211, first exchange port; 212, second exchange port; 220, reheating coil; 221, third exchange port; 222, fourth exchange port; 230, second throttling device; 240, third throttling device;

[0037] 300, first pipeline;

[0038] 400, second pipeline;

[0039] 500, third pipeline;

[0040] 600, radiation terminal; Detailed implementation manners

[0041] Hereinafter, embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the accompanying drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0042] In addition, it should be noted that for the sake of convenience of description, only parts related to the relevant invention are shown in the drawings. Without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

[0043] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order of the functions executed by these devices, modules or units or the interdependent relationship therebetween.

[0044] It should be noted that the modifications of "one" and "multiple" mentioned in this disclosure are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".

[0045] The names of the messages or information exchanged between multiple devices in the embodiments of this disclosure are only for illustrative purposes and are not used to limit the scope of these messages or information.

[0046] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0047] As Figure 1 shown, a heat exchange system of a fresh air integrated machine according to an embodiment of the present application. The heat exchange system of the fresh air integrated machine includes an indoor unit device 200 and an outdoor unit device 100. The indoor unit device 200 and the outdoor unit device 100 are connected through a first pipeline 300, a second pipeline 400, and a third pipeline 500 so that the first working medium in the outdoor unit device 100 can flow into the indoor unit device 200 from two of the first pipeline 300, the second pipeline 400, and the third pipeline 500 and return from the indoor unit device 200 to the outdoor unit device 100 through another pipeline; wherein, the indoor unit device 200 includes an evaporator 210 and a reheating coil 220. The evaporator 210 is arranged on the first pipeline 300, and the reheating coil 220 is arranged on the second pipeline 400; the outdoor unit device 100 is provided with a compressor 110 and an outdoor condenser 120. The compressor 110 and the outdoor condenser 120 are connected to each other through a pipeline and form a closed loop with the indoor unit device 200 through the first pipeline 300, the second pipeline 400, and the third pipeline 500.

[0048] Specifically, the outdoor unit device 100 includes a compressor 110, an outdoor condenser 120, a radiant temperature control unit 130, a four-way valve 140, and a first throttling device 150. The outlet port 111 and the inlet port 112 of the compressor 110 are respectively connected to the D port and the S port of the four-way valve 140. The E port of the four-way valve 140 is connected to the outdoor condenser 120 through a pipeline. One end of the outdoor condenser 120 is connected to the third pipeline 500. A three-way valve 160 is provided at point A of the third pipeline 500. One interface of the three-way valve 160 is connected to the radiant temperature control unit 130, and the other interface of the three-way valve 160 is connected to the indoor unit device 200. A first throttling device 150 is provided on the pipeline between the three-way valve 160 and the radiant temperature control unit 130. An exhaust pipe is provided between the outlet port 111 of the compressor 110 and the four-way valve 140. An exhaust switch, an exhaust pressure gauge, and an exhaust thermometer are provided on the exhaust pipe.

[0049] Among them, the radiation temperature control unit 130 includes a temperature control heat exchanger 131. The temperature control heat exchanger 131 includes a first working port 1311, a second working port 1312, a third working port 1313, and a fourth working port 1314. The first working port 1311 is connected to the three-way valve 160 through a first radiation pipeline 132. The second working port 1312 is connected to the C port of the four-way valve 140 through a first radiation pipeline 132. The third working port 1313 and the fourth working port 1314 are externally connected to a radiation terminal 600 through a second radiation pipeline 133.

[0050] The indoor unit device 200 includes an evaporator 210, a reheating coil 220, and a second throttling device 230. The first exchange port 211 of the evaporator 210 is connected to the C port of the four-way valve 140 through a first pipeline 300. The second exchange port 212 of the evaporator 210 is connected to the outdoor condenser 120 through a third pipeline 500. The reheating coil 220 includes a third exchange port 221 and a fourth exchange port 222. The third exchange port 221 is connected to the pipeline between the compressor 110 and the D port of the four-way valve 140 through a second pipeline 400. The fourth exchange port 222 is connected to the outdoor condenser 120 through a third pipeline 500. A second throttling device 230 is provided on the pipeline between the second exchange port 212 of the evaporator 210 and point A of the third pipeline.

[0051] Among them, the first exchange port 211 of the evaporator 210 is connected to a first pipeline 300 and is connected to the outdoor unit device 100 through the first pipeline 300 so that the first working medium can enter and exit the evaporator 210 from the first exchange port 211 of the evaporator 210. The second exchange port 212 of the evaporator 210 is connected to a third pipeline 500 and is connected to the outdoor unit device 100 through the third pipeline 500. The third exchange port 221 of the reheating coil 220 is connected to a second pipeline 400 and is connected to the outdoor unit device 100 through the second pipeline 400 so that the first working medium can enter and exit the reheating coil 220 from the third exchange port 221 of the reheating coil 220. The fourth exchange port 222 of the reheating coil 220 is connected to the third pipeline 500 and is connected to the outdoor unit device 100 through the third pipeline 500. When the first working medium enters the indoor unit device 200 from the third pipeline 500 and the second pipeline 400, the first working medium that finally undergoes a phase change returns to the outdoor unit device 100 from the first pipeline 300. When the first working medium enters the indoor unit device 200 from the first pipeline 300 and the second pipeline 400, the first working medium that finally undergoes a phase change returns to the outdoor unit device 100 from the third pipeline 500.

[0052] The function of the evaporator 210 is to dehumidify the air blown into the fresh air integrated unit outdoors at a low temperature. The function of the reheating coil 220 is to heat the fresh air after low-temperature dehumidification to the target temperature and then introduce it into the room. Both ends of the evaporator 210 are respectively connected to a first pipeline 300 and a third pipeline 500. The first working medium is a refrigerant, and its specific material is not limited herein. The first working medium can flow from the first pipeline 300 through the evaporator 210 into the third pipeline 500, or can flow from the third pipeline 500 through the evaporator 210 into the first pipeline 300. That is, the indoor unit device 200 includes at least three pipelines, two of which introduce the first working medium from the outdoor unit device 100, and the first working medium is led out from another pipeline. Specifically, when the first working medium is introduced into the indoor unit device 200 from the first pipeline 300 and the second pipeline 400, the first working medium after heat exchange then returns to the outdoor unit device 100 from the third pipeline 500; when the first working medium is introduced into the indoor unit device 200 from the third pipeline 500 and the second pipeline 400, the first working medium after heat exchange then returns to the outdoor unit device 100 from the first pipeline 300.

[0053] The outlet 111 of the compressor 110 outputs the high-temperature and high-pressure gaseous working medium through a pipeline and divides it into two paths. One path passes through the second pipeline 400 and enters the indoor unit. The other path flows through the four-way valve 140. In the refrigeration mode, the D port and the E port of the four-way valve 140 are connected. At this time, the high-temperature and high-pressure gaseous working medium flows through the four-way valve 140 and reaches the outdoor condenser 120 and becomes high-temperature and high-pressure liquid. The outdoor condenser 120 releases heat. The first working medium then passes through the third pipeline 500 and reaches the three-way valve 160 at point A. At this time, the high-temperature and high-pressure liquid working medium is divided into two paths. One path passes through the third pipeline 500 and enters the indoor unit device 200. The other path passes through the first radiation pipeline 132 and reaches the first throttling device 150. The first throttling device 150 is an expansion valve. After passing through the first throttling device 150, the high-temperature and high-pressure liquid working medium becomes a low-temperature and low-pressure gas-liquid two-phase. Then it passes through the temperature control heat exchanger 131 of the radiation temperature control unit 130. The temperature control heat exchanger 131 further vaporizes and absorbs heat from the low-temperature and low-pressure gas-liquid two-phase working medium. Then the working medium coming out of the temperature control heat exchanger 131 becomes a low-temperature and low-pressure gaseous working medium and finally returns to the compressor 110 through the C-port pipeline connected to the four-way valve 140. The process of the temperature control heat exchanger 131 vaporizing and absorbing heat is to cool the second working medium in the radiation terminal 600 externally connected through the second radiation pipeline 133 through the third working port 1313 and the fourth working port 1314 in the temperature control heat exchanger 131. Then the second working medium at a low temperature exchanges heat with the indoor air through the radiation terminal 600 to cool the indoor environment. The other path becomes a low-temperature and low-pressure gas-liquid two-phase after passing through the second throttling device 230. Then it passes through the evaporator 210 to further vaporize and absorb heat from the low-temperature and low-pressure gas-liquid two-phase working medium. Then the working medium coming out of the temperature control heat exchanger 131 becomes a low-temperature and low-pressure gaseous working medium and finally returns to the compressor 110 through the C-port pipeline connected to the four-way valve 140. During the heat absorption process, the hot air outside is cooled to achieve the purpose of dehumidification.

[0054] For the other path entering the indoor unit device 200, the high-temperature and high-pressure gaseous working medium enters the indoor unit device 200 through the second pipeline 400. After that, it becomes a high-temperature and high-pressure liquid working medium after passing through the reheating coil 220. The reheating coil 220 vaporizes and absorbs heat to heat the low-temperature fresh air passing through the evaporator 210 and adjusts the fresh air temperature to the temperature required by the user. The indoor unit device 200 is also provided with a third throttling device 240. The third throttling device 240 is arranged between the fourth exchange port 222 of the reheating coil 220 and the third pipeline. After passing through the third throttling device 240, the high-temperature and high-pressure liquid working medium becomes a low-temperature and low-pressure gas-liquid two-phase and converges with the low-temperature and low-pressure gas-liquid two-phase after throttling by the second throttling device 230 at the second exchange port 212 of the evaporator 210 and then enters the evaporator 210 together. At this time, the working medium after passing through the evaporator 210 becomes a low-temperature and low-pressure gas-liquid and then flows out of the indoor unit device 200 through the first pipeline 300 and enters the outdoor unit device 100 and finally returns to the compressor 110.

[0055] The evaporator 210 is used to dehumidify the air blown into the fresh air integrated machine outdoors at a low temperature, and the reheating coil 220 is used to heat the fresh air after low-temperature dehumidification to the target temperature and then introduce it into the room. The two ends of the evaporator 210 are respectively connected to a first pipeline 300 and a third pipeline 500. The first working medium is a refrigerant, and its specific material is not limited herein. The first working medium can flow from the first pipeline 300 through the evaporator 210 into the third pipeline 500, or from the third pipeline 500 through the evaporator 210 into the first pipeline 300. That is, the indoor unit device 200 includes at least three pipelines, two of which introduce the first working medium from the outdoor unit device 100, and the first working medium is led out from another pipeline. Specifically, when the first working medium is introduced into the indoor unit device 200 from the first pipeline 300 and the second pipeline 400, the first working medium after heat exchange then returns to the outdoor unit device 100 from the third pipeline 500; when the first working medium is introduced into the indoor unit device 200 from the third pipeline 500 and the second pipeline 400, the first working medium after heat exchange then returns to the outdoor unit device 100 from the first pipeline 300.

[0056] More specifically, the outdoor unit device 100 further includes a liquid storage tank 170. The liquid storage tank 170 is arranged in the third pipeline 500 of the outdoor unit device 100. The liquid storage tank 170 can promptly supplement the consumption of the first working medium in the whole system, ensure the stability of the first working medium in the system, and the liquid storage tank is arranged between the three-way valve on the third pipeline and the fourth throttling device. In the heating mode, the fourth throttling device works, and the first working medium in the liquid storage tank first passes through the fourth throttling device and then through the outdoor condenser, preventing the excessive amount of the first working medium in the outdoor condenser from causing liquid-carrying difficulties and affecting its evaporation effect.

[0057] The outdoor unit device 100 includes a four-way valve 140. The four-way valve 140 includes four ports, namely port D, port E, port S, and port C. In the refrigeration mode, port D and port E are connected, and at this time, the first working medium in the compressor 110 enters the four-way valve 140 from port D and is discharged from port E; in the heating mode, port D and port C are connected, and at this time, the first working medium in the compressor 110 enters the four-way valve 140 from port D and is discharged from port C. That is, the four-way valve 140 has a first switching state and a second switching state. When the four-way valve 140 is in the first switching state, the flow direction of the first working medium is from the compressor 110 to the outdoor condenser 120 and then to the evaporator 210; when the four-way valve 140 is in the second switching state, the flow direction of the first working medium is from the compressor 110 to the evaporator 210 and then to the outdoor condenser 120. A fourth throttling device 180 and a check valve 190 are arranged between the outdoor condenser 120 and the liquid storage tank 170. The check valve 190 and the fourth throttling device 180 are connected in parallel between the outdoor condenser 120 and the liquid storage tank 170.

[0058] Specifically, asFigure 2 As shown, in the refrigeration mode, the four-way valve 140 is in the first switching state. The high-temperature and high-pressure gaseous refrigerant flowing out of the outlet 111 of the compressor 110 is divided into two paths. One path passes through the four-way valve 140 and then through the outdoor condenser 120. The first refrigerant becomes high-temperature and high-pressure liquid, and then flows out through the check valve 190 and enters the indoor unit 200 through the third pipeline 500. After entering the indoor unit 200, it reaches the second throttling device 230. After throttling by the second throttling device 230, the high-temperature and high-pressure liquid refrigerant becomes a low-temperature and low-pressure gas-liquid two-phase. Then, it passes through the evaporator 210 to evaporate and cool the refrigerant. At this time, the refrigerant after passing through the evaporator 210 becomes low-temperature and low-pressure gas-liquid and flows out of the indoor unit 200 through the first pipeline 300 and enters the outdoor unit 100, and finally returns to the compressor 110.

[0059] The other path is that the high-temperature and high-pressure gaseous refrigerant enters the indoor unit 200 through the second pipeline 400, and then becomes high-temperature and high-pressure liquid after passing through the reheating coil 220. The high-temperature and high-pressure liquid refrigerant becomes a low-temperature and low-pressure gas-liquid two-phase after passing through the third throttling device 240. It converges with the low-temperature and low-pressure gas-liquid two-phase after throttling by the second throttling device 230 at the second exchange port 212 of the evaporator 210 and then enters the evaporator 210 together. At this time, the refrigerant after passing through the evaporator 210 becomes low-temperature and low-pressure gas-liquid and flows out of the indoor unit 200 through the first pipeline 300 and enters the outdoor unit 100, and finally returns to the compressor 110.

[0060] As Figure 3 shown, in the heating mode, the four-way valve 140 is in the second switching state, and at the same time, the third throttling device 240 is closed, so the reheating coil 220 is in the closed state because only the evaporator 210 is needed to control the temperature of the outdoor air, and there is no need to heat it twice through the reheating coil 220 at this time.

[0061] Specifically, the high-temperature and high-pressure gaseous refrigerant flowing out of the outlet 111 of the compressor 110 is divided into two paths. The first path is to enter the evaporator 210 through the first pipeline 300, that is, the D port and the C port of the four-way valve 140 are connected. At this time, the first refrigerant in the compressor 110 enters the four-way valve 140 from the D port and is discharged from the C port into the evaporator 210. The evaporator 210 changes the high-temperature and high-pressure gaseous refrigerant into high-temperature and high-pressure liquid refrigerant. In the heating mode, the second throttling device 230 is in the non-working state, that is, the physical state of the first refrigerant passing through the second throttling device 230 does not change. The high-temperature and high-pressure liquid refrigerant enters the outdoor unit through the third pipeline and reaches the fourth throttling device 180. The fourth throttling device 180 changes the high-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure gas-liquid two-phase state, and then becomes a low-temperature and low-pressure gaseous refrigerant after passing through the outdoor condenser 120 and returns to the compressor 110.

[0062] In the other path, the high-temperature and high-pressure gaseous working medium enters the radiation temperature control unit 130 through the first radiation pipe 132, and directly passes through the temperature control heat exchanger 131 to become a high-temperature and high-pressure liquid working medium. Similarly, in the heating mode, the first throttling device 150 is in an inoperative state, that is, the physical state of the first working medium passing through the first throttling device 150 does not change. Then, it passes through the third pipeline 500 and merges with the high-temperature and high-pressure liquid working medium passing through the evaporator 210 and arrives at the fourth throttling device 180 together. The fourth throttling device 180 converts the high-temperature and high-pressure liquid working medium into a low-temperature and low-pressure gas-liquid two-phase state, and then passes through the outdoor condenser 120 to become a low-temperature and low-pressure gaseous working medium and then returns to the compressor 110.

[0063] In one specific embodiment, one end of the outdoor condenser 120 is connected to a third pipeline 500. A three-way valve 160 is installed at point A of the third pipeline 500. One port of the three-way valve 160 is connected to the radiant thermostat 130, and the other port of the three-way valve 160 is connected to the indoor unit 200. A first throttling device 150 is installed on the pipeline between the three-way valve 160 and the radiant thermostat 130. The radiant thermostat 130 also includes a water pump 134, which is installed on the second radiant pipe 133 to control the flow rate of the second working medium in the fifth pipe. The radiant thermostat 130 also includes a water supply thermometer 135, which is installed on the second radiant pipe 133. A first throttle device 150 is installed in the pipeline between the three-way valve 160 and the radiant temperature control unit 130 in the outdoor unit 100. This device, in conjunction with the second throttle device 230 in the system piping, effectively distributes the refrigerant in the piping, ensuring precise temperature control on the air side and at the radiant terminal 600, and improving the user experience. The first throttle device 150, the second throttle device 230, the third throttle device 240, and the fourth throttle device 180 are all electronic expansion valves.

[0064] As a second aspect of the present application, some embodiments of the present application provide a heat exchange system for a fresh air integrated machine, including: a water supply thermometer 135 for obtaining the temperature of the radiation terminal 600; a wind side thermometer for obtaining the fresh air temperature of the indoor unit; a first throttling device 150 for adjusting the temperature of the working medium passing through the temperature regulating heat exchanger 131 by changing the valve diameter of the first throttling device 150 itself according to the received control signal; a second throttling device 230 for adjusting the temperature of the working medium passing through the evaporator 210 and / or the reheating coil 220 by changing the valve diameter of the second throttling device 230 itself according to the received control signal; the heat exchange system of the fresh air integrated machine further includes: a control device for sending control signals to the first throttling device 150 and / or the second throttling device 230 according to the control signals sent by the water supply thermometer 135 and / or the wind side thermometer to control the first throttling device 150 and / or the second throttling device 230. Wherein, the control device can be a PLC or an MCU or an FPGA or a CPU. By providing a first throttling device 150 on the pipeline between the three-way valve 160 and the radiation temperature regulating unit 130 in the outdoor unit device 100, it cooperates with the second throttling device 230 in the system pipeline to reasonably distribute the refrigerant in the pipeline, ensuring the accuracy of temperature control of the wind side and the radiation terminal 600 and improving the user experience.

[0065] The above description is only some preferred embodiments of the present disclosure and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A heat exchange system for a fresh air integrated machine, comprising an indoor unit device and an outdoor unit device, characterized in that: The outdoor unit device includes a compressor, an outdoor condenser, a radiation temperature control unit, a four-way valve, and a first throttling device. The outlet and inlet of the compressor are respectively connected to the D port and S port of the four-way valve. The E port of the four-way valve is connected to the outdoor condenser through a pipeline. One end of the outdoor condenser is connected with a third pipeline. A three-way valve is provided at point A of the third pipeline. One interface of the three-way valve is connected to the radiation temperature control unit, and the other interface of the three-way valve is connected to the indoor unit device. A first throttling device is provided on the pipeline between the three-way valve and the radiation temperature control unit; Among them, the radiation temperature control unit includes a temperature control heat exchanger. The temperature control heat exchanger includes a first working port, a second working port, a third working port, and a fourth working port. The first working port is connected to the three-way valve through a first radiation pipeline. The second working port is connected to the C port of the four-way valve through a first radiation pipeline. The third working port and the fourth working port are externally connected to radiation terminals through a second radiation pipeline; The indoor unit device includes an evaporator, a reheating coil, and a second throttling device. The first exchange port of the evaporator is connected to the C port of the four-way valve through a first pipeline. The second exchange port of the evaporator is connected to the outdoor condenser through a third pipeline. The reheating coil includes a third exchange port and a fourth exchange port. The third exchange port is connected to the pipeline between the compressor and the D port of the four-way valve through a second pipeline. The fourth exchange port is connected to the outdoor condenser through a third pipeline. A second throttling device is provided on the pipeline between the second exchange port of the evaporator and point A of the third pipeline.

2. The heat exchange system for a fresh air integrated machine according to claim 1, characterized in that: The indoor unit device is further provided with a third throttling device, and the third throttling device is arranged between the fourth exchange port of the reheating coil and the third pipeline.

3. The heat exchange system for a fresh air integrated machine according to claim 1 or 2, characterized in that: A fourth throttling device and a check valve are provided on the third pipeline connected to the end of the outdoor condenser away from the four-way valve. The check valve and the fourth throttling device are arranged in parallel.

4. The heat exchange system for a fresh air integrated machine according to claim 3, characterized in that: The outdoor unit device further includes a liquid storage tank, and the liquid storage tank is arranged between the three-way valve on the third pipeline and the fourth throttling device.

5. The heat exchange system for a fresh air integrated machine according to claim 4, characterized in that: The four-way valve has a first switching state. When the four-way valve is in the first switching state, the flow direction of the first working medium is from the compressor to the outdoor condenser and then to the evaporator.

6. The heat exchange system for a fresh air integrated machine according to claim 5, characterized in that: The four-way valve further has a second switching state. When the four-way valve is in the second switching state, the flow direction of the first working medium is from the compressor to the evaporator and then to the outdoor condenser.

7. The heat exchange system of the fresh air integrated machine according to claim 1, characterized in that: The radiation temperature control unit further includes a water pump, and the water pump is arranged on the second radiation pipeline to control the flow rate of the second working medium in the pipeline.

8. The heat exchange system of the fresh air integrated machine according to claim 7, characterized in that: The radiation temperature control unit further includes a water supply thermometer, and the water supply thermometer is arranged on the second radiation pipeline.

9. The heat exchange system of the fresh air integrated machine according to claim 8, characterized in that: An exhaust pipe is provided between the outlet of the compressor and the four-way valve, and an exhaust switch, an exhaust pressure gauge and an exhaust thermometer are provided at the exhaust pipe.

10. The heat exchange system of the fresh air integrated machine according to claim 1, characterized in that: The outdoor condenser and the evaporator are finned tube heat exchangers; the reheating coil is a coil heat exchanger; the temperature control heat exchanger is a plate heat exchanger.

11. The heat exchange system of the fresh air integrated machine according to claim 10, characterized in that: A wind side thermometer is provided on one side of both the evaporator and the reheating coil.

12. A heat exchange system of a fresh air integrated machine, comprising: Including an indoor unit device and an outdoor unit device, characterized in that: The outdoor unit device includes a compressor, an outdoor condenser, a radiation temperature control unit, a four-way valve and a first throttling device. The outlet and the inlet of the compressor are respectively connected to the D port and the S port of the four-way valve. The E port of the four-way valve is connected to the outdoor condenser through a pipeline. One end of the outdoor condenser is connected with a third pipeline. A three-way valve is provided at point A of the third pipeline. One interface of the three-way valve is connected to the radiation temperature control unit, and the other interface of the three-way valve is connected to the indoor unit device. A first throttling device is provided on the pipeline between the three-way valve and the radiation temperature control unit; Wherein, the radiation temperature control unit includes a temperature control heat exchanger, and the temperature control heat exchanger includes a first working port, a second working port, a third working port and a fourth working port. The first working port is connected to the three-way valve through a first radiation pipeline. The second working port is connected to the C port of the four-way valve through a first radiation pipeline. The third working port and the fourth working port are externally connected to radiation terminals through a second radiation pipeline; Wherein, The first throttling device is used to realize the change of the valve diameter of the first throttling device itself according to the received control signal to adjust the temperature of the working medium passing through the temperature control heat exchanger; The heat exchange system of the fresh air integrated machine further includes: an evaporator, a reheating coil and a second throttling device. The second throttling device is used to realize the change of the valve diameter of the second throttling device itself according to the received control signal to adjust the temperature of the working medium passing through the evaporator and / or the reheating coil; A water supply thermometer is used to obtain the temperature of the radiation terminal; A wind side thermometer is used to obtain the fresh air temperature of the indoor unit; A control device is used to send control signals to the first throttling device and / or the second throttling device according to the control signals sent by the water supply thermometer and / or the wind side thermometer to control the first throttling device and / or the second throttling device.

13. A heat exchange system for a fresh air integrated machine according to claim 12, characterized in that: The indoor unit device includes an evaporator, a reheating coil and a second throttling device. The first exchange port of the evaporator is connected to port C of the four-way valve through a first pipeline. The second exchange port of the evaporator is connected to the outdoor condenser through a third pipeline. The reheating coil includes a third exchange port and a fourth exchange port. The third exchange port is connected to the pipeline between the compressor and port D of the four-way valve through a second pipeline. The fourth exchange port is connected to the outdoor condenser through a third pipeline. A second throttling device is provided on the pipeline between the second exchange port of the evaporator and point A of the third pipeline.

14. A heat exchange system for a fresh air integrated machine according to claim 13, characterized in that: The outdoor unit device further includes a liquid storage tank, a fourth throttling device and a check valve. The fourth throttling device and the check valve are connected in parallel on the third pipeline. The four-way valve, the outdoor condenser, the fourth throttle valve or the check valve, and the liquid storage tank are arranged in sequence on the third pipeline.

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