Ventilation wall air conditioner

Abstract

The ventilation wall air conditioner comprises an upper module and a lower module, the upper module comprises a surface air cooler, an evaporator and a fan which are sequentially arranged, the lower module comprises a compressor, a heat exchanger and a control valve set, an inlet of the surface air cooler is connected with a heat exchange inlet pipe, an outlet of the surface air cooler is connected with a heat exchange inlet of the heat exchanger, and a heat exchange outlet of the heat exchanger is connected with a heat exchange outlet pipe. A connector of the evaporator is connected with a refrigeration connector of the heat exchanger. The multiple devices are arranged on the upper module and the lower module respectively, the arrangement of the devices is more reasonable, occupation of refrigeration space is reduced, return air resistance is reduced, the influence of heating of the devices on return air temperature is reduced, and the efficiency of the air conditioner is improved.

Description

Technical Field

[0001] The invention relates to the field of refrigeration equipment, in particular to a wind wall air conditioner. Background Art

[0002] As the demand for data center applications grows, the resulting increase in heat dissipation demands also faces huge challenges. Traditional computer room air conditioners have a small cooling capacity and are unable to meet the needs of existing computer rooms; generally, large-capacity air wall air conditioners are used to meet the demand.

[0003] In the process of realizing the present invention, the inventors found that the prior art has at least the following problems: although the simple air-cooled air wall air conditioner meets the cooling demand, it has high energy consumption and cannot save energy; and although the water-cooled air wall can solve the energy consumption problem, it cannot meet the cooling requirements. Furthermore, the layout of the components inside the air conditioner is not reasonable, which occupies the cooling space, increases the return air resistance, and the heat generated by the components themselves affects the return air temperature.

[0004] Therefore, how to provide a wind wall air conditioner that meets both energy saving and refrigeration requirements and has a reasonable layout is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The object of the present invention is to provide a wind wall air conditioner to solve the technical problems of unreasonable internal layout of wind wall air conditioners and occupied refrigeration space in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a wind wall air conditioner, including an upper module and a lower module, the upper module includes a surface cooler, an evaporator and a fan arranged in sequence, the lower module includes a compressor, a heat exchanger and a control valve group, the inlet of the surface cooler is connected to the heat exchange inlet pipe, the outlet of the surface cooler is connected to the heat exchange inlet of the heat exchanger, the heat exchange outlet of the heat exchanger is connected to the heat exchange outlet pipe, and the interface of the evaporator is connected to the refrigeration interface of the heat exchanger through the compressor.

[0007] Preferably, the upper module includes an upper shell, and the surface cooler, the evaporator and the fan are integrated and installed in the upper shell; the lower module includes a lower shell, and the compressor, the heat exchanger and the control valve group are integrated and installed in the lower shell.

[0008] Preferably, the upper shell is installed above the electrostatic floor, and the lower shell is buried under the electrostatic floor.

[0009] Preferably, the surface cooler and the evaporator are in contact with each other, the fan is arranged on the outside of the evaporator, and the return air of the fan is blown toward the surface cooler.

[0010] Preferably, a filter screen is provided on the outside of the surface cooler.

[0011] Preferably, the heat exchange valve group includes a first control valve, a second control valve and a third control valve, the first control valve is respectively connected to the heat exchange outlet of the heat exchanger and the heat exchange outlet pipe, the second control valve is respectively connected to the heat exchange inlet of the heat exchanger and the heat exchange outlet pipe, and the third control valve is respectively connected to the heat exchange inlet of the heat exchanger and the inlet and outlet of the surface cooler.

[0012] Preferably, the first control valve and the second control valve are two-way valves, and the third control valve is a three-way valve.

[0013] Preferably, the heat exchanger is a plate heat exchanger, and coils are provided in the surface cooler and the evaporator.

[0014] Preferably, two compressors are included, and the two compressors are respectively connected to the two interfaces of the evaporator and the two refrigeration interfaces of the heat exchanger.

[0015] Preferably, the delivery directions of the two compressors are opposite.

[0016] The present invention provides a wind wall air conditioner, comprising an upper module and a lower module, the upper module comprising a surface cooler, an evaporator and a fan arranged in sequence, the lower module comprising a compressor, a heat exchanger and a control valve group, the inlet of the surface cooler is connected to a heat exchange inlet pipe, the outlet of the surface cooler is connected to a heat exchange inlet of the heat exchanger, the heat exchange outlet of the heat exchanger is connected to a heat exchange outlet pipe, and the interface of the evaporator is connected to a refrigeration interface of the heat exchanger through the compressor.

[0017] During the working process, there are mechanical cooling mode, pre-cooling mode and natural cooling mode. Selecting the appropriate cooling mode can make full use of the natural cold source, and there is no need to set up an outdoor unit for condensation heat exchange. The upper module belongs to the cooling module, and the lower module belongs to the pipeline components and other device modules. The lower module can be placed under the static floor, reducing the space occupied by pipeline components or electronic control components in the cooling module, which can make the depth of the air conditioner smaller. At this time, the wind wall air conditioner with the same cooling capacity occupies a smaller area. At the same time, because the electronic control components, compressors and heat exchangers are placed in the lower module, the return air resistance of the upper module can be reduced, and the effect of the heat generation of the device itself on the return air temperature can be reduced, which can effectively reduce the fan power and improve the energy efficiency of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a side view schematic diagram of a specific embodiment of the air wall air conditioner provided by the present invention;

[0019] FIG2 is a schematic front view of a specific embodiment of the air wall air conditioner provided by the present invention;

[0020] FIG3 is a system schematic diagram of a specific implementation of the wind wall air conditioner provided by the present invention.

[0021] Among them, there are a surface cooler 1, an evaporator 2, a heat exchanger 3, an electrostatic floor 4, a compressor 5, a heat exchange inlet pipe 6, a heat exchange outlet pipe 7, a first control valve 8, a second control valve 9, a third control valve 10, a fan 11, and a filter 12. DETAILED DESCRIPTION

[0022] The core of the present invention is to provide a wind wall air conditioner to solve the technical problems of unreasonable internal layout of wind wall air conditioners and occupied refrigeration space in the prior art.

[0023] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Please refer to Figures 1 to 3, Figure 1 is a side view schematic diagram of a specific implementation of the wind wall air conditioner provided by the present invention; Figure 2 is a front view schematic diagram of a specific implementation of the wind wall air conditioner provided by the present invention; Figure 3 is a system principle diagram of a specific implementation of the wind wall air conditioner provided by the present invention.

[0025] A specific embodiment of the present invention provides a wind wall air conditioner, including an upper module and a lower module, the upper module includes a surface cooler 1, an evaporator 2 and a fan 11 arranged in sequence, the lower module includes a compressor 5, a heat exchanger 3 and a control valve group, the surface cooler 1 and the evaporator 2 are both provided with an inlet and an outlet, and the respective pipelines of the surface cooler 1 and the evaporator 2 do not interfere with each other, the heat exchanger 3 has a heat exchange inlet, a heat exchange outlet and two refrigeration interfaces, the heat exchange inlet pipe 6 is connected to the inlet of the surface cooler 1, the outlet of the surface cooler 1 is connected to the heat exchange inlet of the heat exchanger 3, and the heat exchange outlet of the heat exchanger 3 is connected to the heat exchange outlet pipe 7 to form a heat exchange circuit, the heat exchange medium flows in this circuit, the fan 11 blows air to the surface cooler 1, the air exchanges heat with the surface cooler 1, and blows out cold air to achieve refrigeration. The heat exchange medium can be various types of flowing media such as water, wherein the natural cold source outputs the heat exchange medium through the heat exchange inlet pipe 6, and the heat exchange medium flows back to the natural cold source through the heat exchange outlet pipe 7. The high-temperature heat exchange medium after the heat exchange is completed is cooled in the natural cold source, and a power device can also be set in the natural cold source. The outlet of the compressor 5 is connected to the refrigeration interface of the heat exchanger 3, and another refrigeration interface of the heat exchanger 3 is connected to the inlet of the evaporator 2. The interface of the evaporator 2 is connected to the inlet of the compressor 5, forming a refrigeration circuit, and the refrigerant flows in this circuit. The fan 11 blows air to the evaporator 2, and the air exchanges heat with the evaporator 2, and blows out cold air to achieve refrigeration.

[0026] During the working process, there are mechanical cooling mode, pre-cooling mode and natural cooling mode. Selecting the appropriate cooling mode can make full use of the natural cold source, and there is no need to set up an outdoor unit for condensation heat exchange. The upper module belongs to the cooling module, and the lower module belongs to the pipeline components and other device modules. The lower module can be placed under the static floor, reducing the space occupied by pipeline components or electronic control components in the cooling module, which can make the depth of the air conditioner smaller. At this time, the wind wall air conditioner with the same cooling capacity occupies a smaller area. At the same time, because the electronic control components, compressors and heat exchangers are placed in the lower module, the return air resistance of the upper module can be reduced, and the effect of the heat generation of the device itself on the return air temperature can be reduced, which can effectively reduce the fan power and improve the energy efficiency of the air conditioner.

[0027] Specifically, the upper module includes an upper shell, and the surface cooler 1, evaporator 2 and fan 11 are integrated and installed in the upper shell. The lower module includes a lower shell, and the compressor 5, heat exchanger 3 and control valve group are integrated and installed in the lower shell. The upper shell is installed above the electrostatic floor 4, and the lower shell is buried under the electrostatic floor 4. The upper and lower modules are independent individuals and can be transported and carried separately when the transportation space is limited. At the same time, when maintaining the internal components of the lower module with a higher failure frequency, it does not affect the normal operation and use of the upper module. At the same time, since the upper and lower modules are separated, when the cold water leaks and overflows from the lower module, the risk of water entering the computer room can be effectively reduced.

[0028] The cooler 1 and the evaporator 2 are in contact with each other, and the fan 11 is arranged on the outside of the evaporator 2. The return air of the fan 11 blows toward the cooler 1. A filter 12 is arranged on the outside of the cooler 1. The cooler 1 and the evaporator 2 can participate in heat exchange at the same time, improve the efficiency of the whole machine, avoid energy waste, and improve the stability and safety of system operation. On the one hand, the cooler 1 provides a pre-cooling effect, and on the other hand, it can prevent the cooler 1 from freezing and cracking when the evaporator 2 is at a low temperature.

[0029] In the wind wall air conditioner provided by the specific embodiment of the present invention, the control valve group includes a first control valve 8, a second control valve 9 and a third control valve 10. The first control valve 8 is connected to the heat exchange outlet of the heat exchanger 3 and the heat exchange outlet pipe 7 respectively, the second control valve 9 is connected to the heat exchange inlet of the heat exchanger 3 and the heat exchange outlet pipe 7 respectively, and the third control valve 10 is connected to the heat exchange inlet of the heat exchanger 3 and the inlet and outlet of the surface cooler 1 respectively, and controls the flow opening. That is, the heat exchanger 3 is connected in series with the first control valve 8, the second control valve 9 is connected in parallel with the heat exchanger 3 and the first control valve 8, and a bypass passage capable of short-circuiting the surface cooler 1 is set, and connected to the system through the third control valve 10.

[0030] Specifically, the heat exchange inlet pipe 6 is connected to the inlet of the cooler 1, the outlet of the cooler 1 is connected to the first interface of the third control valve 10, the second interface of the third control valve 10 is connected to the heat exchange inlet of the heat exchanger 3, and the third interface of the third control valve 10 is connected to the heat exchange inlet pipe 6 through the bypass passage, and the heat exchange outlet of the heat exchanger 3 is connected to the heat exchange outlet pipe 7 through the first control valve 8, forming a heat exchange loop, the heat exchange medium flows in this loop, the fan blows air to the cooler 1, the air and the cooler 1 perform heat exchange, and the cold air is blown out to achieve refrigeration, and the outlet of the cooler 1 is also directly connected to the heat exchange outlet pipe 7 through the second control valve 9. The outlet of the compressor 5 is connected to the refrigeration inlet of the heat exchanger 3, the refrigeration outlet of the heat exchanger 3 is connected to the electronic expansion valve, and the electronic expansion valve is connected to the inlet of the evaporator 2, and the outlet of the evaporator 2 is connected to the inlet of the compressor 5, forming a refrigeration loop, the refrigerant flows in this loop, the fan blows air to the evaporator 2, the air and the evaporator 2 perform heat exchange, and the cold air is blown out to achieve refrigeration.

[0031] During the operation, it is necessary to judge the inlet temperature of the heat exchange medium and the return air temperature. If the inlet temperature of the heat exchange medium is higher than the return air temperature, the surface cooler 1 is no longer suitable for participating in the refrigeration work and enters the mechanical cooling mode. The first control valve 8 is opened, the second control valve 9 is closed, the first interface and the second interface of the third control valve 10 are isolated, the second interface and the third interface are connected, the compressor 5 is started, and the heat exchange medium flows through the heat exchange inlet pipe 6, the third control valve 10, the heat exchanger 3, the first control valve 8 and the heat exchange outlet pipe 7 in turn, and the refrigerant flows through the compressor 5, the heat exchanger 3, the electronic expansion valve and the evaporator 2 in turn, wherein the heat exchange medium and the refrigerant perform heat exchange in the heat exchanger 3 to help complete the morphology change of the refrigerant. During refrigeration, the evaporator 2 performs heat exchange with the air to blow out cold air.

[0032] If the inlet temperature of the heat exchange medium is lower than the return air temperature, the natural cold source can be kept in operation. In the pre-cooling mode, the compressor 5 is controlled to start, the first control valve 8 is turned on, the second control valve 9 is closed, the first interface of the third control valve 10 is connected to the second interface, and the third interface is isolated. The heat exchange medium flows through the heat exchange inlet pipe 6, the surface cooler 1, the heat exchanger 3, the first control valve 8 and the heat exchange outlet pipe 7 in sequence, and the refrigerant flows through the compressor 5, the heat exchanger 3, the electronic expansion valve and the evaporator 2 in sequence, wherein the heat exchange medium and the refrigerant exchange heat in the heat exchanger 3 to help complete the morphological change of the refrigerant. At the same time, since the inlet temperature of the heat exchange medium is always lower than the return air temperature, the fan blowing to the surface cooler 1 will not affect the refrigeration work. During refrigeration, the surface cooler 1 and the evaporator 2 jointly exchange heat with the air. The surface cooler 1 can also pre-cool the evaporator 2 to avoid damage to the evaporator 2, and then blow out cold air. In natural cooling mode, the compressor 5 is controlled to be closed, the first control valve 8 is closed, the second control valve 9 is turned on, the first interface of the third control valve 10 is connected to the second interface, and the third interface is isolated. The heat exchange medium flows through the heat exchange inlet pipe 6, the surface cooler 1, the second control valve 9 and the heat exchange outlet pipe 7 in sequence. The refrigerant does not flow. Since the heat exchange medium inlet temperature is always lower than the return air temperature, the fan blows to the surface cooler 1. When cooling, the surface cooler 1 exchanges heat with the air, and then blows out cold air. In natural cooling mode, it does not pass through the heat exchanger 3, and the water resistance is low and there is no pressure drop.

[0033] Preferably, the first control valve 8 and the second control valve 9 are two-way valves, and the third control valve 10 is a three-way valve. The load rate of the direct expansion refrigeration system is calculated by the evaporation temperature, the condensation temperature, and the compressor frequency. When the load rate is higher than 80%, it is found that the flow of the surface cooler 1 is too large and the pressure drop is large. The three-way valve is closed to 70%, the overall water pressure drop is reduced by 20-30%, and the refrigeration capacity of the surface cooler 1 is reduced by less than 5%. The flow rate can also be detected by a flow meter. When the set value is reached, the three-way valve is closed to 70%. Further, to prevent the pre-cooling mode and the natural cooling mode from switching back and forth, the single compressor lower limit speed runs for a period of time before switching to the natural cooling mode. When the compressor lower limit speed is running, the three-way valve is converted to a regulating type, and the supply air temperature setting value is used as the target value. The valve is closed to reduce the cooling output of the surface cooler 1 to avoid a large drop in the supply air temperature. Each setting parameter can be adjusted according to the situation, all within the protection scope of the present invention.

[0034] The heat exchanger 3 is specifically a plate heat exchanger 3 , and coils are arranged in the surface cooler 1 and the evaporator 2 .

[0035] Based on the air wall air conditioner provided in the above specific embodiments, two compressors 5 are included, and the two compressors 5 are respectively connected to the two interfaces of the evaporator 2 and the two refrigeration interfaces of the heat exchanger 3. Specifically, the delivery directions of the two compressors 5 are opposite, so that the overall evaporation of the evaporator 2 is more uniform, the occurrence of local hot spots is avoided, and the operating power is also reduced.

[0036] The above is a detailed introduction to the wind wall air conditioner provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A wind wall air conditioner, characterized in that: The invention comprises an upper module and a lower module, wherein the upper module comprises a cooler (1), an evaporator (2) and a fan (11) which are arranged in sequence, and the lower module comprises a compressor (5), a heat exchanger (3) and a control valve group, wherein the inlet of the cooler (1) is connected to a heat exchange inlet pipe (6), the outlet of the cooler (1) is connected to a heat exchange inlet of the heat exchanger (3), the heat exchange outlet of the heat exchanger (3) is connected to a heat exchange outlet pipe (7), and the interface of the evaporator (2) is connected to the refrigeration interface of the heat exchanger (3) through the compressor (5).

2. The wind wall air conditioner according to claim 1, characterized in that: The upper module comprises an upper shell, in which the surface cooler (1), the evaporator (2) and the fan (11) are integrated and installed, and the lower module comprises a lower shell, in which the compressor (5), the heat exchanger (3) and the control valve group are integrated and installed.

3. The wind wall air conditioner according to claim 2, characterized in that: The upper shell is installed above the electrostatic floor (4), and the lower shell is buried below the electrostatic floor (4).

4. The wind wall air conditioner according to claim 3, characterized in that: The surface cooler (1) and the evaporator (2) are in contact with each other, the fan (11) is arranged outside the evaporator (2), and the return air of the fan (11) is blown toward the surface cooler (1).

5. The wind wall air conditioner according to claim 4, characterized in that: A filter screen (12) is provided on the outside of the surface cooler (1).

6. The wind wall air conditioner according to claim 1, characterized in that: The heat exchange valve group comprises a first control valve (8), a second control valve (9) and a third control valve (10); the first control valve (8) is respectively connected to the heat exchange outlet of the heat exchanger (3) and the heat exchange outlet pipe (7); the second control valve (9) is respectively connected to the heat exchange inlet of the heat exchanger (3) and the heat exchange outlet pipe (7); and the third control valve (10) is respectively connected to the heat exchange inlet of the heat exchanger (3) and the inlet and outlet of the surface cooler (1).

7. The wind wall air conditioner according to claim 6, characterized in that: The first control valve (8) and the second control valve (9) are two-way valves, and the third control valve (10) is a three-way valve.

8. The wind wall air conditioner according to claim 1, characterized in that: The heat exchanger (3) is specifically a plate heat exchanger, and coils are provided in the surface cooler (1) and the evaporator (2).

9. The wind wall air conditioner according to any one of claims 1 to 9, characterized in that: It comprises two compressors (5), and the two compressors (5) are respectively connected to the two interfaces of the evaporator (2) and the two refrigeration interfaces of the heat exchanger (3).

10. The wind wall air conditioner according to claim 9, characterized in that: The delivery directions of the two compressors (5) are opposite.

Images