Internal temperature control device of outdoor air conditioner electric control cabinet

Abstract

The utility model relates to the technical field of machine room air conditioners, in particular to an outdoor air conditioner electric control cabinet internal temperature control device which comprises a compressor, a condenser, a liquid storage tank, a fluorine pump, an expansion valve, an evaporator, a heat exchange pipe, a circulating pump, an outdoor electric control cabinet, a heat exchange plate and an expansion tank. The secondary refrigerant is changed into a normal-temperature secondary refrigerant after passing through the heat exchange tube and then enters the heat exchange plate, and the normal-temperature secondary refrigerant at the moment is changed into a high-temperature secondary refrigerant after absorbing heat in the outdoor electric control cabinet; in winter, a compressor is closed, a fluorine pump is opened, a circulating pump is opened to provide power for a secondary refrigerant, the low-temperature secondary refrigerant is changed into a normal-temperature secondary refrigerant after passing through a heat exchange pipe and then enters a heat exchange plate, and the normal-temperature secondary refrigerant is changed into the low-temperature secondary refrigerant after releasing heat into the outdoor electric control cabinet; in transition seasons, the rotating speed of the circulating pump is adjusted, the flow temperature of the secondary refrigerant is adjusted, and the temperature in the outdoor electric control cabinet is stabilized.

Description

Technical Field

[0001] The utility model relates to the technical field of machine room air conditioners, in particular to an internal temperature control device of an outdoor air conditioner electric control cabinet. Background Art

[0002] With the development of the data center industry, server power density has gradually increased, and the cooling capacity of traditional split-type computer room air conditioners cannot meet the heat dissipation needs. The current demand for large-capacity heat dissipation and rapid deployment of prefabricated installation in data centers has led to the emergence of outdoor integrated computer room air conditioners, which have the advantages of large-capacity prefabrication, high energy efficiency, and saving server cabinet space. However, as a large-scale refrigeration equipment, the electrical control cabinet of the outdoor integrated computer room air conditioner contains numerous electrical components. With the widespread application of variable-frequency refrigeration components such as variable-frequency compressors and variable-frequency water pumps, more and more electrical control cabinets are equipped with various types of inverters, reactors, and filters. This puts higher requirements on the internal temperature control of the electrical control cabinet.

[0003] To meet the heat dissipation needs of the electric control cabinet in summer, the traditional approach is to use a cooling fan to dissipate heat from the electric control cabinet; to meet the insulation needs of the electric control cabinet in winter, the traditional approach is to use external heating patches or the heat dissipation of the electrical components themselves to maintain the internal temperature of the electric control cabinet.

[0004] Currently, in the scenario of extremely low temperatures in outdoor electrical control cabinets, the temperature inside the electrical control cabinets is often too low, causing some electrical components to fail and affecting the reliability of the unit. Utility Model Content

[0005] The purpose of this utility model is to provide an internal temperature control device for an outdoor air-conditioning electric control cabinet, which aims to solve the problem that in the current scenario of extremely low temperatures in outdoor electric control cabinets, the temperature inside the electric control cabinet is often too low, causing some electrical components to fail and affecting the reliability of the unit.

[0006] To achieve the above-mentioned purpose, the present invention provides an internal temperature control device of an outdoor air-conditioning electric control cabinet, comprising a compressor, a condenser, a liquid storage tank, a fluorine pump, an expansion valve, an evaporator, a heat exchange tube, a circulation pump, an outdoor electric control cabinet, a heat exchange plate and an expansion tank, wherein the input end of the compressor is communicated with the evaporator and is located at the output end of the evaporator, the input end of the condenser is communicated with the compressor and is located at the output end of the compressor, the input end of the liquid storage tank is communicated with the condenser and is located at the output end of the condenser, the input end of the fluorine pump is communicated with the liquid storage tank and is located at the output end of the liquid storage tank, and the input end of the expansion valve is communicated with the fluorine pump and is located at the output end of the fluorine pump the output end of the evaporator, the input end of the evaporator is communicated with the expansion valve and is located at the output end of the expansion valve, the output end of the evaporator is wound with the heat exchange tube, the outdoor electric control cabinet is arranged on one side of the heat exchange tube, the heat exchange plate is fixedly connected to the outdoor electric control cabinet and is located at the inner side wall of the outdoor electric control cabinet, the output end of the heat exchange tube is communicated with the heat exchange plate and is located at the input end of the heat exchange plate, the input end of the circulating pump is communicated with the heat exchange plate and is located at the output end of the heat exchange plate, the output end of the circulating pump is communicated with the heat exchange tube and is located at the input end of the heat exchange tube, the expansion tank is communicated with the heat exchange plate and is located at the output end of the heat exchange plate.

[0007] Among them, the internal temperature control device of the outdoor air-conditioning electric control cabinet also includes an emergency fan and an emergency heat dissipation channel. The emergency heat dissipation channel is connected to the outdoor electric control cabinet and is located at the top of the outdoor electric control cabinet. The emergency fan is fixedly connected to the emergency heat dissipation channel and is located on the inner wall of the emergency heat dissipation channel.

[0008] Wherein, the compressor and the fluorine pump are respectively provided with a bypass one-way valve.

[0009] Wherein, the heat exchange pipe is provided with a bypass valve.

[0010] The utility model discloses an internal temperature control device for an outdoor air-conditioning electric control cabinet. In summer, the cooling operation of the air-conditioning unit is mainly operated by the compressor mode. The compressor is turned on and the fluorine pump is turned off. At this time, there is a heat dissipation demand inside the outdoor electric control cabinet. The circulating pump in the temperature control device of the outdoor electric control cabinet is turned on to provide power for the refrigerant. After the high-temperature refrigerant passes through the circulating pump, it enters the heat exchange tube; the high-temperature refrigerant transfers heat to the normal-temperature low-pressure gaseous refrigerant, flows out of the heat exchange tube and becomes a normal-temperature refrigerant, and then enters the heat exchange plate inside the outdoor electric control cabinet; after the normal-temperature refrigerant absorbs the heat inside the outdoor electric control cabinet, it flows out of the heat exchange plate inside the outdoor electric control cabinet and becomes a high-temperature refrigerant, thereby cooling the internal environment of the outdoor electric control cabinet; in winter, the cooling operation of the air-conditioning unit is mainly operated by the fluorine pump mode. The compressor is turned off. , turn on the fluorine pump. At this time, there is a need for insulation inside the outdoor electric control cabinet. The circulating pump in the temperature control device of the outdoor electric control cabinet is turned on to provide power for the coolant. After the low-temperature coolant passes through the circulating pump, it enters the heat exchange tube; the low-temperature coolant absorbs heat from the normal temperature and low-pressure gaseous refrigerant, flows out of the heat exchange tube and becomes a normal temperature coolant, and then enters the heat exchange plate inside the outdoor electric control cabinet; after the normal temperature coolant releases heat and temperature to the inside of the outdoor electric control cabinet, it flows out of the heat exchange plate inside the outdoor electric control cabinet and becomes a low-temperature coolant, thereby achieving temperature increase in the internal environment of the outdoor electric control cabinet; in transition seasons or when the outdoor electric control cabinet needs heating or cooling, the flow rate and temperature of the coolant are regulated by adjusting the speed of the circulating pump, thereby further stabilizing the temperature inside the outdoor electric control cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0012] Figure 1 It is a structural schematic diagram of the internal temperature control device of the outdoor air-conditioning electric control cabinet of the present utility model.

[0013] Figure 2 It is a schematic diagram of the working process of the temperature control device inside the electric control cabinet of the outdoor air conditioner of the present invention.

[0014] Figure 3 It is a structural schematic diagram of embodiment 1 of the present utility model.

[0015] Figure 4 This is a structural diagram of Example 2 of the present utility model.

[0016] Figure 5 This is a structural diagram of Example 3 of the present utility model.

[0017] Figure 6This is a structural diagram of Example 4 of the present utility model.

[0018] 101-compressor, 102-condenser, 103-liquid storage tank, 104-fluorine pump, 105-expansion valve, 106-evaporator, 107-heat exchange tube, 108-circulation pump, 109-outdoor electric control cabinet, 110-heat exchange plate, 111-expansion tank, 112-emergency fan, 113-emergency heat dissipation channel, 114-bypass check valve, 115-bypass valve. DETAILED DESCRIPTION

[0019] See also Figure 1 and Figure 2 ,in, Figure 1 This is a schematic diagram of the structure of the temperature control device inside the electric control cabinet of an outdoor air conditioner of the present invention. Figure 2 It is a schematic diagram of the working process of the temperature control device inside the electric control cabinet of the outdoor air conditioner of the present invention.

[0020] The utility model provides an internal temperature control device of an outdoor air-conditioning electric control cabinet, comprising a compressor 101, a condenser 102, a liquid storage tank 103, a fluorine pump 104, an expansion valve 105, an evaporator 106, a heat exchange tube 107, a circulation pump 108, an outdoor electric control cabinet 109, a heat exchange plate 110, an expansion tank 111, an emergency fan 112 and an emergency heat dissipation channel 113. The compressor 101 and the fluorine pump 104 are respectively provided with a bypass one-way valve 114, and the heat exchange tube 107 is provided with a bypass valve 115.

[0021] The input end of the compressor 101 is communicated with the evaporator 106 and is located at the output end of the evaporator 106. The input end of the condenser 102 is communicated with the compressor 101 and is located at the output end of the compressor 101. The input end of the liquid storage tank 103 is communicated with the condenser 102 and is located at the output end of the condenser 102. The input end of the fluorine pump 104 is communicated with the liquid storage tank 103 and is located at the output end of the liquid storage tank 103. The input end of the expansion valve 105 is communicated with the fluorine pump 104 and is located at the output end of the fluorine pump 104. The input end of the evaporator 106 is communicated with the expansion valve 105 and is located at the output end of the expansion valve 105. 06 is wrapped with the heat exchange tube 107, the outdoor electric control cabinet 109 is arranged on one side of the heat exchange tube 107, the heat exchange plate 110 is fixedly connected to the outdoor electric control cabinet 109 and is located on the inner wall of the outdoor electric control cabinet 109, the output end of the heat exchange tube 107 is communicated with the heat exchange plate 110 and is located at the input end of the heat exchange plate 110, the input end of the circulating pump 108 is communicated with the heat exchange plate 110 and is located at the output end of the heat exchange plate 110, the output end of the circulating pump 108 is communicated with the heat exchange tube 107 and is located at the input end of the heat exchange tube 107, the expansion tank 111 is communicated with the heat exchange plate 110 and is located at the output end of the heat exchange plate 110.

[0022] In this embodiment, the cooling operation of the air-conditioning unit in summer is mainly operated by the compressor 101 mode. The compressor 101 is turned on and the fluorine pump 104 is turned off. At this time, there is a heat dissipation demand inside the outdoor electric control cabinet 109. The circulating pump 108 in the temperature control device of the outdoor electric control cabinet is turned on to provide power for the coolant. After the high-temperature coolant passes through the circulating pump 108, it enters the heat exchange tube 107; the high-temperature coolant transfers heat to the normal-temperature low-pressure gaseous refrigerant, flows out of the heat exchange tube 107 and becomes a normal-temperature coolant, and then enters the heat exchange plate 110 inside the outdoor electric control cabinet 109; after the normal-temperature coolant absorbs the heat inside the outdoor electric control cabinet 109, it flows out of the heat exchange plate 110 inside the outdoor electric control cabinet 109 and becomes a high-temperature coolant, thereby cooling the internal environment of the outdoor electric control cabinet 109; in winter, the cooling operation of the air-conditioning unit is mainly operated by the fluorine pump 104 mode. The compressor 101 is turned off and the fluorine pump 1 is turned on. 04. At this time, there is a need for insulation inside the outdoor electric control cabinet 109. The circulating pump 108 in the temperature control device of the outdoor electric control cabinet 109 is turned on to provide power for the coolant. After passing through the circulating pump 108, the low-temperature coolant enters the heat exchange tube 107; the low-temperature coolant absorbs heat from the normal-temperature and low-pressure gaseous refrigerant, flows out of the heat exchange tube 107 and becomes a normal-temperature coolant, and then enters the heat exchange plate 110 inside the outdoor electric control cabinet 109; after the normal-temperature coolant releases heat and temperature to the inside of the outdoor electric control cabinet 109, it flows out of the heat exchange plate 110 inside the outdoor electric control cabinet 109 and becomes a low-temperature coolant, thereby increasing the temperature of the internal environment of the outdoor electric control cabinet 109; in transition seasons or when there is a need for heating or cooling inside the outdoor electric control cabinet 109, the speed of the circulating pump 108 is adjusted to adjust the flow rate and temperature of the coolant, thereby further stabilizing the temperature inside the outdoor electric control cabinet 109.

[0023] Furthermore, the emergency heat dissipation channel 113 is communicated with the outdoor electric control cabinet 109 and is located on the top of the outdoor electric control cabinet 109 . The emergency fan 112 is fixedly connected to the emergency heat dissipation channel 113 and is located on the inner wall of the emergency heat dissipation channel 113 .

[0024] In this embodiment, under normal circumstances, the emergency heat dissipation channel 113 is closed and the emergency fan 112 is turned off, so that the internal environment of the outdoor electric control cabinet 109 is closed; when the unit is in an abnormal state, such as failure of the circulating pump 108, air conditioning refrigeration failure, etc., after detecting that the internal temperature of the electric control box is higher than the limit, the outdoor electric control cabinet 109 urgently opens the emergency heat dissipation channel 113 and the emergency fan 112 is forced to open to achieve cooling.

[0025] Furthermore, the compressor 101 and the fluorine pump 104 are respectively provided with a bypass check valve 114 .

[0026] In this embodiment, when the compressor 101 and the fluorine pump 104 are turned off, the bypass check valve 114 can be directly connected to the medium.

[0027] Furthermore, the heat exchange pipe 107 is provided with a bypass valve 115 .

[0028] In this embodiment, the bypass valve 115 adjusts the flow rate and temperature of the brine, further stabilizing the temperature inside the outdoor electric control cabinet 109 .

[0029] In this embodiment, if Figure 2 The following illustrates the first temperature threshold value T1, the second temperature threshold value T2, and the third temperature threshold value T3, which detect the internal temperature value Tx of the electrical control cabinet. The system is divided into four modes: Mode A (standby mode), Mode B (emergency mode), Mode C (heat dissipation mode), and Mode D (insulation mode). Mode A is standby mode, with the circulating water pump off and the bypass valve 115 open. Mode B is emergency mode, with the top and bottom emergency passages and the emergency fan 112 fully open for emergency heat dissipation. The circulating water pump is on, and the bypass valve 115 of the heat pipe is closed. Mode C is heat dissipation mode, with the bypass valve 115 of the heat pipe closed in heat dissipation mode. The greater the difference between Tx and T2, the higher the speed of the circulating pump 108. The smaller the difference between Tx and T2, the lower the speed of the circulating pump 108. After the pump speed is adjusted to the minimum, the bypass valve 115 of the heat exchange tube 107 can be opened to further reduce heat exchange. In special cases, the circulating pump 108 is already at its highest speed or the water pump fails, and Tx is still greater than T3. In this case, the system is forced to enter mode B. Mode D is a heat preservation mode. In heat dissipation mode, the bypass valve 115 of the heat pipe is closed. The greater the difference between Tx and T1, the higher the speed of the circulating pump 108. The smaller the difference between Tx and T1, the lower the speed of the circulating pump 108. After the pump speed is adjusted to the minimum speed, the bypass valve 115 of the heat exchange pipe 107 can be opened to continue reducing heat exchange. After entering different modes, it is periodically determined whether the entry conditions for entering the mode are met. If not, the mode determination is restarted.

[0030] Example 1:

[0031] See also Figure 3 ,like Figure 3 As shown, the bypass valve 115 on one side of the heat exchange tube 107 is cancelled. When the heating demand or cooling demand inside the outdoor electric control cabinet 109 is not large, only the speed of the circulating pump 108 can be adjusted to adjust the flow rate and temperature of the refrigerant and stabilize the temperature inside the outdoor electric control cabinet 109.

[0032] Example 2:

[0033] See also Figure 4 ,like Figure 4 As shown, adding liquid electric heating can heat the medium in the pipeline.

[0034] Example 3:

[0035] See also Figure 5 ,like Figure 5 As shown, a fan is added to the heat exchange plate 110 to directly cool the heat exchange plate 110 to avoid overheating of the heat exchange plate 110.

[0036] Example 4:

[0037] See also Figure 6 ,like Figure 6 As shown, the positions of the circulation pump 108 and the expansion tank 111 are changed to be located at the input end 110 of the heat exchange plate, so as to pressurize the medium in the pipeline and better promote the flow of the medium.

[0038] The above disclosure is only a preferred embodiment of the present application and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present application are still within the scope covered by the present application.

Claims

1. An internal temperature control device for an outdoor air-conditioning electric control cabinet, characterized in that: The invention comprises a compressor, a condenser, a liquid storage tank, a fluorine pump, an expansion valve, an evaporator, a heat exchange tube, a circulation pump, an outdoor electric control cabinet, a heat exchange plate and an expansion tank. The input end of the compressor is connected to the evaporator and is located at the output end of the evaporator. The input end of the condenser is connected to the compressor and is located at the output end of the compressor. The input end of the liquid storage tank is connected to the condenser and is located at the output end of the condenser. The input end of the fluorine pump is connected to the liquid storage tank and is located at the output end of the liquid storage tank. The input end of the expansion valve is connected to the fluorine pump and is located at the output end of the fluorine pump. The input end of the evaporator is connected to the The expansion valve is connected and located at the output end of the expansion valve, the output end of the evaporator is wrapped with the heat exchange tube, the outdoor electric control cabinet is arranged on one side of the heat exchange tube, the heat exchange plate is fixedly connected to the outdoor electric control cabinet and is located on the inner wall of the outdoor electric control cabinet, the output end of the heat exchange tube is connected to the heat exchange plate and located at the input end of the heat exchange plate, the input end of the circulating pump is connected to the heat exchange plate and located at the output end of the heat exchange plate, the output end of the circulating pump is connected to the heat exchange tube and located at the input end of the heat exchange tube, and the expansion tank is connected to the heat exchange plate and located at the output end of the heat exchange plate.

2. The internal temperature control device of the outdoor air-conditioning electric control cabinet according to claim 1, characterized in that: The internal temperature control device of the outdoor air-conditioning electric control cabinet also includes an emergency fan and an emergency heat dissipation channel. The emergency heat dissipation channel is connected to the outdoor electric control cabinet and is located at the top of the outdoor electric control cabinet. The emergency fan is fixedly connected to the emergency heat dissipation channel and is located on the inner wall of the emergency heat dissipation channel.

3. The internal temperature control device of the outdoor air-conditioning electric control cabinet according to claim 2, characterized in that: The compressor and the fluorine pump are respectively provided with a bypass one-way valve.

4. The internal temperature control device of the outdoor air-conditioning electric control cabinet according to claim 3, characterized in that: The heat exchange tube is provided with a bypass valve.

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