Heat recovery type machine room air conditioner refrigeration cycle system

Abstract

The utility model discloses a heat recovery type machine room air conditioner refrigeration cycle system which comprises a compressor. The heat recovery control mechanism is connected with the heat recovery side heat exchanger; one end of the flow direction control mechanism is connected with a first branch pipeline in the three-way pipeline, the other ends of the flow direction control mechanism are connected with the compressor, the heat recovery control mechanism and the condenser, a second branch pipeline in the three-way pipeline is connected with the heat recovery control mechanism, and a third branch pipeline in the three-way pipeline is connected to a first loop arranged on the compressor. A control valve is arranged on the third branch pipeline; two branches at one end of the branch pipe are respectively connected with the heat recovery control mechanism and the machine room side heat exchanger, the other end of the branch pipe is connected with one end of the throttling device, and the other end of the throttling device is connected with the condenser; the machine room side heat exchanger is connected with the compressor through a first loop. And a plurality of blowers. The problems that the prior art is not suitable for a small machine room and is low in efficiency, high in cost, difficult to maintain and the like are solved.

Description

Technical Field

[0001] The present application relates to the technical field of comprehensive utilization of waste heat energy from air conditioners, and in particular to a heat recovery type refrigeration cycle system for a computer room air conditioner. Background Art

[0002] During winter operation, computer room air conditioners must exhaust heat from the room through a refrigeration cycle to maintain a suitable temperature and humidity. However, this exhausted heat contains a significant amount of thermal energy, which is typically discharged outdoors through the refrigeration cycle, effectively wasting energy. Heat recovery technology uses specific devices and systems to recycle this otherwise wasted heat. For example, the recovered heat can be used for domestic hot water supply, swimming pool heating, and other purposes, thereby achieving energy conservation and emission reduction.

[0003] Existing heat recovery solutions for computer room air conditioners primarily include air-to-air and water-to-water. The air-to-air solution uses a heat exchanger to exchange hot air exhausted from the computer room with cold air drawn in from outside. This preheats the cold air before supplying it to other rooms, reducing the heating load on the air conditioners in those rooms. The water-to-water solution uses a heat exchanger to exchange cooling water from the computer room air conditioner system with other systems requiring hot water.

[0004] With the rapid development of technologies such as cloud computing, big data, the Internet of Things, and 5G, some enterprises and institutions are establishing computer rooms to meet their business needs. Since some small computer rooms may be used to process relatively small amounts of data and business, they may not be suitable for installing traditional heat recovery systems due to cost and space constraints.

[0005] Common air-to-air heat recovery solutions and water-to-water heat recovery solutions can both recycle heat that would otherwise be wasted. Although these solutions can meet the requirements of energy conservation and consumption reduction and improve energy comprehensive utilization efficiency, they still have some shortcomings.

[0006] Air-to-air heat recovery solutions: First, their heat recovery efficiency is limited. Due to temperature differentials and unstable air flow, it is often difficult to achieve a high level of heat recovery efficiency. Therefore, the amount of heat that can be transferred through air-to-air heat exchange is limited. Second, air quality can affect the air quality and the normal operation of the equipment in the computer room. Without a good filtration system, long-term use of air-to-air heat recovery may cause the air quality in the computer room to gradually deteriorate. Third, air-to-air heat exchangers are generally large and require a certain amount of space. For computer rooms with limited space, installing heat exchangers can be difficult.

[0007] Water-to-water heat recovery solution: First, the system complexity increases. Water-to-water heat recovery requires additional piping systems, heat exchangers, and control devices, which makes the entire computer room air conditioning system more complicated and increases the possibility of failure. Complex systems also require professional maintenance personnel to perform regular inspections and maintenance, which increases maintenance costs. Second, the water quality requirements are high. Water-to-water heat exchange has high requirements for water quality. If the water quality is poor, it may cause scaling and corrosion inside the heat exchanger, reducing heat exchange efficiency and even damaging the heat exchanger. Third, the computer room has strict requirements on continuous operation time, and the water piping system has the risk of leakage, which can easily damage the equipment in the computer room and cause losses. Utility Model Content

[0008] In view of this, the main purpose of this application is to provide a heat recovery type computer room air conditioning refrigeration cycle system, which is conducive to solving the problems that the existing technology is not suitable for small computer rooms, and the existing technology has problems such as low efficiency, high cost, and difficult maintenance.

[0009] The present application provides a heat recovery type computer room air conditioning refrigeration cycle system, which includes:

[0010] compressor;

[0011] A heat recovery control mechanism connected to a medium inlet-side pipeline and a medium outlet-side pipeline of a heat exchanger on the heat recovery side;

[0012] a flow direction control mechanism, one end of which is connected to a first branch pipeline in a three-pronged pipeline, and the other ends of the flow direction control mechanism are respectively connected to the medium outlet side of the compressor, the medium outlet side of the heat recovery control mechanism, and the medium inlet side of the condenser, wherein the second branch pipeline in the three-pronged pipeline is connected to the medium inlet side of the heat recovery control mechanism, and the third branch pipeline in the three-pronged pipeline is connected to a first circuit provided on the medium inlet side of the compressor, and a control valve is provided on the third branch pipeline;

[0013] A branch pipe, one end of which has two branches connected to the other medium inlet side of the heat recovery control mechanism and the medium inlet side of the heat exchanger on the machine room side, respectively; the other end of the branch pipe is connected to one end of the throttling device, and the other end of the throttling device is connected to the medium outlet side of the condenser;

[0014] The medium outlet side of the heat exchanger on the machine room side is connected to the medium inlet side of the compressor through the first circuit;

[0015] A plurality of air blowers are respectively arranged on the air outlet side of the heat exchanger on the heat recovery side, the condenser and the heat exchanger on the machine room side.

[0016] From the above, the present application sets the heat exchanger on the machine room side (i.e. the indoor unit of the machine room air conditioner) in parallel with the heat recovery control mechanism to improve energy utilization efficiency; in the existing conventional machine room air conditioning refrigeration system, a flow control mechanism and a heat recovery control mechanism for switching the flow direction of the refrigerant medium are added, so that the waste heat generated by the machine room during winter cooling can be provided to other places in need for heating through the heat recovery control mechanism, and no additional electricity is needed when heating other rooms in winter, so it is more energy-efficient. By integrating the heat recovery function into the existing machine room air conditioning refrigeration system, the need to install an additional set of The independent heat recovery system reduces costs and saves installation space. The branch pipe enables the heat recovery computer room air conditioning refrigeration cycle system to provide cooling services for two indoor units (i.e., the heat exchanger on the computer room side and the heat recovery side) at the same time in summer, and to perform cooling and heating separately in winter to meet the needs of different seasons. The throttling device can automatically adjust the refrigerant medium flow according to actual operating conditions to ensure the optimal superheat inside the air conditioner indoor unit, thereby improving efficiency and saving energy. The reasonable layout of components such as three-pronged pipes and control valves further optimizes the distribution and flow path of the refrigerant medium.

[0017] Optionally, the heat recovery control mechanism includes:

[0018] a first control valve, which is arranged on the medium inlet side pipeline of the heat recovery control mechanism;

[0019] A second control valve is provided on the medium outlet side pipeline of the heat recovery control mechanism;

[0020] The third control valve is arranged on another medium inlet side pipeline of the heat recovery control mechanism.

[0021] As shown above, the first control valve and the second control valve work together in the heat recovery cycle to ensure the efficient heat recovery process; the second control valve and the third control valve work together in the refrigeration cycle, and the flow path of the refrigerant medium is changed by adjusting the state of each control valve to meet the needs of different seasons.

[0022] Optionally, the first control valve, the second control valve and the third control valve include solenoid valves.

[0023] As described above, the solenoid valve has a fast response speed, which enables the heat recovery computer room air conditioning refrigeration cycle system to quickly adjust the flow path of the refrigerant medium; during the heat recovery process, the solenoid valve can accurately adjust the amount of refrigerant entering the heat recovery heat exchanger, thereby improving the heat recovery efficiency; the solenoid valve has a simple structure, a relatively low failure rate, and a correspondingly low maintenance cost.

[0024] Optionally, the flow direction control mechanism includes a four-way reversing valve.

[0025] As shown above, the four-way reversing valve can change the flow direction of the refrigerant medium, thereby realizing the switching of the heat recovery type computer room air conditioning refrigeration cycle system between different modes; by adjusting the flow direction of the refrigerant medium by the four-way reversing valve, the high-temperature and high-pressure refrigerant discharged by the compressor can be fully utilized for heat recovery without the need for additional electricity consumption; the four-way reversing valve has a simple structure, reduces installation complexity and cost, and improves space utilization.

[0026] Optionally, one end of the flow direction control mechanism is connected to the first branch pipeline in the three-pronged pipeline, and the other ends of the flow direction control mechanism are respectively connected to the medium outlet side of the compressor, the medium outlet side of the heat recovery control mechanism, and the medium inlet side of the condenser, and further includes:

[0027] The E port of the four-way reversing valve is connected to the first branch pipeline;

[0028] The D port of the four-way reversing valve is connected to the pipeline on the medium outlet side of the compressor;

[0029] The S port of the four-way reversing valve is connected to the medium outlet side pipeline of the heat recovery control mechanism provided with the second control valve;

[0030] The C port of the four-way reversing valve is connected to the pipeline on the medium inlet side of the condenser.

[0031] From the above, by rationally configuring the four-way reversing valve and its port connections, the heat recovery computer room air conditioning refrigeration cycle system can provide dual-inner cooling in summer and realize the function of one inner cooling and the other inner heating in winter, meeting the needs of different seasons.

[0032] Optionally, a pressure sensor and a temperature sensor are provided on the medium inlet side and the medium outlet side pipeline of the compressor, wherein a high-pressure switch is also provided on the medium outlet side pipeline of the compressor, and the pressure sensor, the temperature sensor and the high-pressure switch are electrically connected to the controller.

[0033] As shown above, the high-pressure switch, as a safety device, will automatically trigger an alarm and cut off the power supply when it detects that the preset safety pressure is exceeded, preventing safety accidents caused by excessive pressure; the controller can automatically adjust the working mode of the heat recovery computer room air conditioning refrigeration cycle system based on the information feedback from the pressure sensor and temperature sensor, such as switching the state of the four-way reversing valve and adjusting the opening of the electronic expansion valve, thereby improving the convenience and reliability of operation.

[0034] Optionally, the throttling device includes a first electronic expansion valve.

[0035] As mentioned above, the electronic expansion valve can adjust the flow of the refrigerant medium in real time according to system requirements. By receiving data from the sensor, the controller can adjust its valve opening to ensure that the refrigerant medium flow matches the current load to improve heat exchange efficiency and system performance.

[0036] Optionally, a second expansion valve is provided on the medium outlet side pipeline of the heat exchanger on the heat recovery side.

[0037] Optionally, a third expansion valve is provided on the medium inlet side pipeline of the machine room side heat exchanger.

[0038] Optionally, the control valve comprises a solenoid valve.

[0039] In summary, the heat recovery type computer room air conditioning refrigeration cycle system provided by the present application, when the computer room air conditioning is cooling in winter, uses the high-temperature and high-pressure refrigerant discharged from the compressor, which first flows through the heat recovery side heat exchanger for heat dissipation through the added flow control mechanism and heat recovery control mechanism, and then enters the condenser, and realizes heat recovery through the refrigerant medium circulation inside the system, without the need to add a separate heat recovery system, reducing costs and saving installation space. Compared with the conventional method of adding a separate heat recovery system, the heat recovery type computer room air conditioning refrigeration cycle system is more integrated, and the waste heat generated during cooling is directly recovered to the heat recovery computer room air conditioning The refrigeration cycle system is adjusted to generate heat, so that heating in winter does not require additional electricity consumption, which is more energy-efficient; when the heat recovery side heat exchanger needs to be operated for cooling, the flow direction of the refrigerant medium on the heat recovery side is controlled by the flow control mechanism and the switching direction through the heat recovery control mechanism, so that the heat recovery type computer room air conditioning refrigeration cycle system can be used in winter. The heat exchanger on the computer room side can be used for cooling, and the heat exchanger on the heat recovery side can be used for heating. In summer, the heat exchanger on the computer room side and the heat recovery side can be used for cooling at the same time, which meets the heat recovery needs in winter and the cooling needs in summer at the same time, thereby improving the convenience of system use. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The following further illustrates the various technical features of the present application and the relationships between them with reference to the accompanying drawings. The accompanying drawings are exemplary, and some technical features are not shown in actual proportion. In addition, some drawings may omit technical features that are commonly used in the technical field to which the present application belongs and are not essential for understanding and implementing the present application, or additional technical features that are not essential for understanding and implementing the present application may be shown. In other words, the combination of the various technical features shown in the accompanying drawings is not intended to limit the present application. In addition, throughout the present application, the same figure numbers refer to the same content. The specific description of the drawings is as follows:

[0041] Figure 1 This is an operating diagram of a heat recovery type computer room air conditioning refrigeration cycle system in the heat recovery mode in this application;

[0042] Figure 2 This is an operating diagram of a heat recovery type computer room air conditioning refrigeration cycle system in the cooling mode in this application.

[0043] Description of Reference Numerals

[0044] 1-Compressor, 2-Four-way reversing valve, 3-First solenoid valve, 4-Heat recovery side heat exchanger, 5-First air blower, 6-Second solenoid valve, 7-Third solenoid valve, 8-Heat recovery control mechanism, 9-Condenser, 10-Second air blower, 11-First electronic expansion valve, 12-Branch pipe, 13-Machine room side heat exchanger, 14-Third air blower, 15-Fourth solenoid valve, 16-Second electronic expansion valve, 17-Third electronic expansion valve, 18-Low pressure sensor, 19-First temperature sensor, 20-High pressure sensor, 21-Second temperature sensor, 22-High pressure switch, a-First branch pipeline, b-Second branch pipeline, c-Third branch pipeline, d-First circuit.

[0045] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present application are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present application.

[0047] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0048] The following describes in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems using specific embodiments. The specific embodiments described below can be combined with each other to form new embodiments. The same or similar ideas or processes described in one embodiment may not be repeated in other embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0049] The present application provides a heat recovery type computer room air conditioning refrigeration cycle system, which includes:

[0050] compressor;

[0051] A heat recovery control mechanism connected to a medium inlet-side pipeline and a medium outlet-side pipeline of a heat exchanger on the heat recovery side;

[0052] A flow direction control mechanism, one end of which is connected to the first branch pipeline in the three-pronged pipeline, and the other ends of the flow direction control mechanism are respectively connected to the medium outlet side of the compressor, the medium outlet side of the heat recovery control mechanism, and the medium inlet side of the condenser, wherein the second branch pipeline in the three-pronged pipeline is connected to the medium inlet side of the heat recovery control mechanism, and the third branch pipeline in the three-pronged pipeline is connected to the first circuit provided on the medium inlet side of the compressor, and a control valve is provided on the third branch pipeline;

[0053] A branch pipe, one end of which has two branches connected to the other medium inlet side of the heat recovery control mechanism and the medium inlet side of the heat exchanger on the machine room side, respectively; the other end of the branch pipe is connected to one end of the throttling device, and the other end of the throttling device is connected to the medium outlet side of the condenser;

[0054] The medium outlet side of the heat exchanger on the machine room side is connected to the medium inlet side of the compressor through the first circuit;

[0055] Multiple air blowers are respectively arranged on the air outlet side of the heat exchanger on the heat recovery side, the condenser and the heat exchanger on the machine room side.

[0056] Specifically, the present application sets the heat exchanger on the machine room side (i.e., the indoor unit of the machine room air conditioner) in parallel with the heat recovery control mechanism to improve energy utilization efficiency; in the existing conventional machine room air conditioning refrigeration system, a flow control mechanism and a heat recovery control mechanism for switching the flow direction of the refrigerant medium are added, so that the waste heat generated by the machine room during winter cooling can be provided to other places in need for heating through the heat recovery control mechanism, and no additional electricity is needed when heating other rooms in winter, so it is more energy-efficient. By integrating the heat recovery function into the existing machine room air conditioning refrigeration system, the installation of an additional An independent heat recovery system reduces costs and saves installation space. The branch pipe enables the heat recovery computer room air conditioning refrigeration cycle system to provide cooling services for two indoor units (i.e., the heat exchanger on the computer room side and the heat recovery side) at the same time in summer, and to perform cooling and heating separately in winter to meet the needs of different seasons. The throttling device can automatically adjust the refrigerant medium flow according to actual operating conditions to ensure the optimal superheat inside the air conditioner indoor unit, thereby improving efficiency and saving energy. The reasonable layout of components such as three-pronged pipes and control valves further optimizes the distribution and flow path of the refrigerant medium.

[0057] Optionally, the heat recovery control mechanism includes: a first control valve, which is arranged on the medium inlet side pipeline of the heat recovery control mechanism; a second control valve, which is arranged on the medium outlet side pipeline of the heat recovery control mechanism; and a third control valve, which is arranged on another medium inlet side pipeline of the heat recovery control mechanism.

[0058] Specifically, the first control valve and the second control valve work together in the heat recovery cycle to ensure that the heat recovery process is carried out efficiently; the second control valve and the third control valve work together in the refrigeration cycle, and the flow path of the refrigerant medium is changed by adjusting the state of each control valve to meet the needs of different seasons.

[0059] Optionally, the first control valve, the second control valve and the third control valve include solenoid valves.

[0060] Specifically, the solenoid valve has a fast response speed, allowing the heat recovery computer room air conditioning refrigeration cycle system to quickly adjust the flow path of the refrigerant medium; during the heat recovery process, the solenoid valve can accurately adjust the amount of refrigerant entering the heat recovery heat exchanger, thereby improving the heat recovery efficiency; the solenoid valve has a simple structure, a relatively low failure rate, and correspondingly low maintenance costs.

[0061] Optionally, the flow direction control mechanism includes a four-way reversing valve.

[0062] Specifically, the four-way reversing valve can change the flow direction of the refrigerant medium, thereby realizing the switching of the heat recovery type computer room air conditioning refrigeration cycle system between different modes; by adjusting the flow direction of the refrigerant medium through the four-way reversing valve, the high-temperature and high-pressure refrigerant discharged by the compressor can be fully utilized for heat recovery without the need for additional electricity consumption; the four-way reversing valve has a simple structure, reduces installation complexity and cost, and improves space utilization.

[0063] Optionally, the flow control mechanism has one end connected to the first branch pipeline in the three-way pipeline, and the other ends of the flow control mechanism are respectively connected to the compressor medium outlet side, the heat recovery control mechanism medium outlet side and the condenser medium inlet side, and also includes: the E port of the four-way reversing valve is connected to the first branch pipeline; the D port of the four-way reversing valve is connected to the compressor medium outlet side pipeline; the S port of the four-way reversing valve is connected to the heat recovery control mechanism medium outlet side pipeline provided with a second control valve; the C port of the four-way reversing valve is connected to the condenser medium inlet side pipeline.

[0064] Specifically, by rationally configuring the four-way reversing valve and its port connections, the heat recovery computer room air conditioning refrigeration cycle system can provide dual-inner cooling in summer and realize the functions of one inner cooling and the other inner heating in winter, meeting the needs of different seasons.

[0065] Optionally, a pressure sensor and a temperature sensor are provided on the compressor medium inlet side and medium outlet side pipelines, wherein a high-pressure switch is also provided on the compressor medium outlet side pipeline, and the pressure sensor, temperature sensor and high-pressure switch are electrically connected to the controller.

[0066] Specifically, as a safety device, the high-pressure switch will automatically trigger an alarm and cut off the power supply when it detects that the pressure exceeds the preset safety pressure, preventing safety accidents caused by excessive pressure; the controller can automatically adjust the working mode of the heat recovery computer room air conditioning refrigeration cycle system based on the information feedback from the pressure sensor and temperature sensor, such as switching the state of the four-way reversing valve, adjusting the opening of the electronic expansion valve, etc., thereby improving the convenience and reliability of operation.

[0067] Optionally, the throttling device includes a first electronic expansion valve.

[0068] Specifically, the electronic expansion valve can adjust the flow of the refrigerant medium in real time according to system requirements. By receiving data from the sensor, the controller can adjust its valve opening to ensure that the refrigerant medium flow matches the current load to improve heat exchange efficiency and system performance.

[0069] Optionally, a second expansion valve is provided on the medium outlet side pipeline of the heat exchanger on the heat recovery side.

[0070] Optionally, a third expansion valve is provided on the medium inlet side pipeline of the heat exchanger on the machine room side.

[0071] Optionally, the control valve comprises a solenoid valve.

[0072] The present application provides a setting with a heat recovery control mechanism, in which the flow direction of the refrigerant medium is switched by a flow control mechanism and a heat recovery control mechanism, so as to realize the operation mode of simultaneous cooling of two indoor units (heat exchanger on the machine room side and heat recovery side) in summer and heat recovery in winter.

[0073] like Figure 1-2 As shown, the heat recovery type computer room air conditioning refrigeration cycle system includes a compressor 1, a four-way reversing valve 2, a first solenoid valve 3, a heat recovery side heat exchanger 4, a first air blower 5, a second solenoid valve 6, a third solenoid valve 7, a heat recovery control mechanism 8, a condenser 9, a second air blower 10, a first electronic expansion valve 11, a branch pipe 12, a computer room side heat exchanger 13, a third air blower 14, a fourth solenoid valve 15, a second electronic expansion valve 16, a third electronic expansion valve 17, a low pressure sensor 18, a first temperature sensor 19, a high pressure sensor 20, a second temperature sensor 21, a high pressure switch 22, as well as main components such as a controller and connecting pipelines, among which the flow direction control mechanism includes the four-way reversing valve 2, the heat recovery control mechanism 8 includes the first solenoid valve 3, the second solenoid valve 6 and the third solenoid valve 7, and the throttling device includes the first electronic expansion valve 11.

[0074] In a specific embodiment of the present application, the medium outlet side of the compressor 1 is connected to the D port of the four-way reversing valve 2 through a pipeline, the medium inlet side of the condenser 9 is connected to the C port of the four-way reversing valve 2 through a pipeline, the second blower 10 is arranged on the air outlet side of the condenser 9, the medium outlet side of the pipeline provided with the second solenoid valve 6 in the heat recovery control mechanism 8 is connected to the S port of the four-way reversing valve 2, the first branch pipeline a in the three-way pipeline is connected to the E port of the four-way reversing valve 2, the second branch pipeline b in the three-way pipeline is connected to the medium inlet side of the pipeline provided with the first solenoid valve 3 in the heat recovery control mechanism 8, and in the heat recovery control mechanism 8, the pipeline provided with the first solenoid valve 3 and the pipeline provided with the third solenoid valve 7 are connected. A main pipeline is formed to supply refrigerant medium to flow into the heat recovery side heat exchanger 4. A second electronic expansion valve 16 is provided on the pipeline between the medium outlet side of the heat recovery side heat exchanger 4 and the second solenoid valve 6 to accurately adjust the refrigerant flow entering the heat recovery side heat exchanger 4. The first blower 5 is provided on the air outlet side of the heat recovery side heat exchanger 4; the pipeline provided with the third solenoid valve 7 serves as another medium inlet side pipeline of the heat recovery control mechanism 8 and is connected to the branch pipe 12. At the same time, the same side of the branch pipe 12 is also connected to the medium inlet side of the machine room side heat exchanger 13 through a pipeline. A third electronic expansion valve 17 is also provided on the pipeline between the branch pipe 12 and the machine room side heat exchanger 13 to accurately adjust the refrigerant flow entering the machine room side heat exchanger 13; the machine room side The medium outlet side of the heat exchanger 13 is connected to the medium inlet side of the compressor 1 through the first circuit d, and the third blower 14 is arranged on the air outlet side of the heat exchanger 13 on the machine room side, wherein the first circuit d is connected to the third branch pipe c in the three-way pipe, and the third branch pipe c is provided with a fourth solenoid valve 15; a low-pressure sensor 18 and a first temperature sensor 19 are also provided on the medium inlet side pipe of the compressor 1, and the low-pressure sensor 18 and the first temperature sensor 19 are electrically connected to the controller, and the sensing data of the low-pressure sensor 18 and the first temperature sensor 19 are fed back to the first electronic expansion valve 11 through the controller, and the first electronic expansion valve 11 makes adjustments accordingly; a high-pressure sensor 20 is also provided on the medium outlet side pipe of the compressor 1 , the second temperature sensor 21 and the high-pressure switch 22. The high-pressure sensor 20, the second temperature sensor 21 and the high-pressure switch 22 are also electrically connected to the controller. The controller detects the pressure and temperature of the refrigerant medium in the heat recovery machine room air conditioning refrigeration cycle system and ensures the safety of the entire system by controlling the high-pressure switch; at the same time, the controller is also electrically connected to the compressor 1, the four-way reversing valve 2, the heat recovery side heat exchanger 4, the first air blower 5, the heat recovery control mechanism 8, the condenser 9, the second air blower 10, the first electronic expansion valve 11, the machine room side heat exchanger 13, the third air blower 14, the fourth solenoid valve 15, the second electronic expansion valve 16, the third electronic expansion valve 17 and other devices, and the electrical control is simple and reliable.

[0075] It should be noted that the heat recovery side heat exchanger 4 is set in other rooms, and the machine room side heat exchanger 13 is set in the machine room; in summer, both the heat recovery side heat exchanger 4 and the machine room side heat exchanger 13 need to be cooled, at this time the condenser 9 is running, and the speed of the second air blower 10 can be adjusted according to the indoor temperature; in winter, the heat recovery side heat exchanger 4 dissipates heat to the room, and the machine room side heat exchanger 13 absorbs heat into the machine room. At this time, whether the condenser 9 is running can be determined according to the heat dissipation of the heat recovery side heat exchanger 4, and whether the second air blower 10 is speed-adjusted when the condenser 9 is running.

[0076] exist Figure 1 and Figure 2 In the figure, the three arrows on one side of the heat recovery side heat exchanger 4 and the machine room side heat exchanger 13 indicate the return air direction, and the return air and supply air are both indoors. The first blower 5 and the third blower 14 allow the air to pass through the heat recovery side heat exchanger 4 and the machine room side heat exchanger 13 for heat exchange, and then supply air to the room; the condenser 9 is set outdoors, and its return air and supply air are both outdoors. The second blower 10 allows the indoor air to pass through the condenser 9 for heat exchange and become hot air, and then discharge the hot air to the outdoors.

[0077] Heat recovery mode

[0078] like Figure 1 As shown, the four-way reversing valve 2 switches the refrigerant flow direction, that is, the D port and the E port of the four-way reversing valve 2 are connected, and the C port and the S port of the four-way reversing valve 2 are connected, so that the compressor 1 is connected with the heat recovery side heat exchanger 4 (used as a condenser at this time), and the heat recovery side heat exchanger 4 is connected with the condenser 9. At this time, the first solenoid valve 3 is open, the second solenoid valve 6 is open, the third solenoid valve 7 is closed, and the fourth solenoid valve 15 is closed. At this time, the flow direction of the refrigerant in the heat recovery type computer room air conditioning refrigeration cycle system is: after the compressor 1 is exhausted, it passes through the four-way reversing valve 2 and flows into the heat recovery side heat exchanger 4 and the condenser 9 in turn to dissipate heat to the outdoors, then enters the first electronic expansion valve 11 for throttling, and the computer room side heat exchanger 13 (used as an evaporator at this time) evaporates and absorbs heat, and finally returns to the compressor 1 to complete a heat recovery cycle.

[0079] While the refrigerant is running, the first blower 5 operates, using the high-temperature, high-pressure refrigerant discharged from the compressor 1 to dissipate heat in the heat recovery-side heat exchanger 4. Meanwhile, the second blower 10 controls its operation and speed based on the refrigerant temperature and degree of subcooling. The third blower 14 operates to absorb heat from the interior of the room. While the third blower 14 delivers cool air to the room, the first blower 5 can deliver hot air to the room, thereby achieving heat recovery.

[0080] Cooling mode

[0081] like Figure 2As shown, at this time, the four-way reversing valve 2 switches the refrigerant flow direction, that is, the D port and the C port of the four-way reversing valve 2 are connected, and the E port and the S port of the four-way reversing valve 2 are connected, so that the compressor 1 is connected to the condenser 9. At this time, the second solenoid valve 6, the third solenoid valve 7, and the fourth solenoid valve 15 are opened, and the first solenoid valve 3 is closed. At this time, the flow direction of the refrigerant in the heat recovery type machine room air conditioning refrigeration cycle system is: after the compressor 1 is exhausted, it flows into the condenser 9 after passing through the four-way reversing valve 2 to dissipate heat to the outdoors, and then enters the first electronic expansion valve 11 for throttling, and flows into the heat recovery side heat exchanger 4 (used as an evaporator at this time) and the machine room side heat exchanger 13 (used as an evaporator at this time) through the branch pipe 12 to evaporate and absorb heat, and finally returns to the compressor 1 after converging to complete a refrigeration cycle.

[0082] While the refrigerant medium is running, the second blower 10 is running to take away the heat dissipated by the condenser 9. The third blower 14 and the first blower 05 are running to cool down different rooms.

[0083] This application utilizes the heat recovery control mechanism 8 to recycle heat energy that would otherwise be wasted in a small computer room into rooms that require heating. This system is simple to install and control, improves system energy efficiency, and reduces computer room operating costs. By reducing energy consumption and lowering energy costs, the operating costs of a small computer room can be significantly reduced. This is an important consideration for cost-sensitive small businesses or organizations.

[0084] This heat recovery computer room air conditioning refrigeration cycle system enables simultaneous cooling and heating. Using a one-for-two indoor and outdoor unit configuration (i.e., one condenser and two evaporators in summer), the two indoor units can independently provide cooling and heating in winter, while simultaneously providing cooling in summer. This reduces the number of outdoor units, enabling a single unit to serve multiple purposes. For small computer rooms with limited space, this can save the space required to install separate heat recovery equipment, improving space utilization. It also makes installation and maintenance easier, and provides more centralized control.

[0085] This application enables the controller to accurately calculate the heat load of the computer room, including heat generated by factors such as heat dissipation from equipment within the computer room and lighting. By accurately calculating the heat load, the capacity of the heat exchanger on the heat recovery side is determined, ensuring that the heat recovery computer room air conditioning refrigeration cycle system can meet the heating needs of the rooms on the heat recovery side.

[0086] In addition, the pipeline layout on the refrigerant heat recovery side should be reasonable, and the pipeline length and the number of elbows should be minimized to reduce pipeline resistance and the risk of refrigerant leakage. At the same time, high-quality insulation materials should be used to insulate the pipeline to ensure that the temperature of the refrigerant medium in the pipeline remains stable and improve the heat recovery efficiency.

[0087] The heat recovery control mechanism in this application utilizes three-inlet, two-outlet piping installed within the refrigeration cycle of the computer room air conditioner. One side of the heat recovery control mechanism has a three-pipe interface, while the other side has a two-pipe interface. The heat recovery control mechanism switches the refrigerant flow direction on the heat recovery side in different modes. When the computer room is cooling in winter, the heat exchanger on the heat recovery side functions as a condenser, recovering the heat it emits, which can be used for winter heating and preheating fresh air in the surrounding area.

[0088] In this application, a four-way reversing valve and a heat recovery control mechanism are used to switch the flow direction of the refrigerant medium to realize the opening and closing of the heat recovery heating mode. Only the flow direction of the four-way reversing valve and the heat recovery control mechanism is controlled. No other moving parts are required. The system has high reliability, easy installation, stable operation of the unit, efficient operation, simple control and high reliability.

[0089] In summary, the heat recovery type computer room air conditioning refrigeration cycle system provided by the present application, when the computer room air conditioning is cooling in winter, uses the high-temperature and high-pressure refrigerant discharged from the compressor, which first flows through the heat recovery side heat exchanger for heat dissipation through the added flow control mechanism and heat recovery control mechanism, and then enters the condenser, and realizes heat recovery through the refrigerant medium circulation inside the system, without the need to add a separate heat recovery system, reducing costs and saving installation space. Compared with the conventional method of adding a separate heat recovery system, the heat recovery type computer room air conditioning refrigeration cycle system is more integrated, and the waste heat generated during cooling is directly recovered to the heat recovery computer room air conditioning The refrigeration cycle system is adjusted to generate heat, so that heating in winter does not require additional electricity consumption, which is more energy-efficient; when the heat recovery side heat exchanger needs to be operated for cooling, the flow direction of the refrigerant medium on the heat recovery side is controlled by the flow control mechanism and the switching direction through the heat recovery control mechanism, so that the heat recovery type computer room air conditioning refrigeration cycle system can be used in winter. The heat exchanger on the computer room side can be used for cooling, and the heat exchanger on the heat recovery side can be used for heating. In summer, the heat exchanger on the computer room side and the heat recovery side can be used for cooling at the same time, which meets the heat recovery needs in winter and the cooling needs in summer at the same time, thereby improving the convenience of system use.

[0090] Unless otherwise defined, all technical and scientific terms used in this application are the same as those commonly understood by those skilled in the art to which this application belongs. In the event of any inconsistency, the meaning described in the full text of this application or the meaning derived from the content recorded in the full text of this application shall prevail. In addition, the terms used in this description are only for the purpose of describing the embodiments of the present application and are not intended to limit this application.

[0091] It should be noted that the terms "installed," "disposed," "equipped with," "provided with," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; they can be mechanical connections; they can be direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0092] Note that the above are only preferred embodiments of the present application and the technical principles employed. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the technical concept of the present application, all of which fall within the scope of protection of the present application.

[0093] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heat recovery type computer room air conditioning refrigeration cycle system, characterized in that: include: compressor; A heat recovery control mechanism connected to a medium inlet-side pipeline and a medium outlet-side pipeline of a heat exchanger on the heat recovery side; a flow direction control mechanism, one end of which is connected to a first branch pipeline in a three-pronged pipeline, and the other ends of the flow direction control mechanism are respectively connected to the medium outlet side of the compressor, the medium outlet side of the heat recovery control mechanism, and the medium inlet side of the condenser, wherein the second branch pipeline in the three-pronged pipeline is connected to the medium inlet side of the heat recovery control mechanism, and the third branch pipeline in the three-pronged pipeline is connected to a first circuit provided on the medium inlet side of the compressor, and a control valve is provided on the third branch pipeline; A branch pipe, one end of which has two branches connected to the other medium inlet side of the heat recovery control mechanism and the medium inlet side of the heat exchanger on the machine room side, respectively; the other end of the branch pipe is connected to one end of the throttling device, and the other end of the throttling device is connected to the medium outlet side of the condenser; The medium outlet side of the heat exchanger on the machine room side is connected to the medium inlet side of the compressor through the first circuit; A plurality of air blowers are respectively arranged on the air outlet side of the heat exchanger on the heat recovery side, the condenser and the heat exchanger on the machine room side.

2. The heat recovery type computer room air conditioning refrigeration cycle system according to claim 1, characterized in that: The heat recovery control mechanism includes: a first control valve, which is arranged on the medium inlet side pipeline of the heat recovery control mechanism; A second control valve is provided on the medium outlet side pipeline of the heat recovery control mechanism; The third control valve is arranged on another medium inlet side pipeline of the heat recovery control mechanism.

3. The heat recovery type computer room air conditioning refrigeration cycle system according to claim 2, characterized in that: The first control valve, the second control valve, and the third control valve include solenoid valves.

4. The heat recovery type computer room air conditioning refrigeration cycle system according to claim 2, characterized in that: The flow direction control mechanism includes a four-way reversing valve.

5. The heat recovery type computer room air conditioning refrigeration cycle system according to claim 4, characterized in that: The flow direction control mechanism, one end of which is connected to the first branch pipeline in the three-pronged pipeline, and the other ends of the flow direction control mechanism are respectively connected to the medium outlet side of the compressor, the medium outlet side of the heat recovery control mechanism, and the medium inlet side of the condenser, further comprising: The E port of the four-way reversing valve is connected to the first branch pipeline; The D port of the four-way reversing valve is connected to the pipeline on the medium outlet side of the compressor; The S port of the four-way reversing valve is connected to the medium outlet side pipeline of the heat recovery control mechanism provided with the second control valve; The C port of the four-way reversing valve is connected to the pipeline on the medium inlet side of the condenser.

6. The heat recovery type computer room air conditioning refrigeration cycle system according to claim 1, characterized in that: A pressure sensor and a temperature sensor are provided on the pipelines on the medium inlet side and the medium outlet side of the compressor, wherein a high-pressure switch is also provided on the pipeline on the medium outlet side of the compressor. The pressure sensor, the temperature sensor and the high-pressure switch are electrically connected to the controller.

7. The heat recovery type computer room air conditioning refrigeration cycle system according to claim 1, characterized in that: The throttling device includes a first electronic expansion valve.

8. The heat recovery type computer room air conditioning refrigeration cycle system according to claim 1, characterized in that: A second expansion valve is provided on the medium outlet side pipeline of the heat exchanger on the heat recovery side.

9. The heat recovery type computer room air conditioning refrigeration cycle system according to claim 1 or 8, characterized in that: A third expansion valve is provided on the medium inlet side pipeline of the machine room side heat exchanger.

10. The heat recovery type computer room air conditioning refrigeration cycle system according to claim 1, characterized in that: The control valve includes a solenoid valve.

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