Heat exchange device, control method thereof, and refrigeration apparatus

Abstract

The present disclosure relates to a heat exchange device, a control method thereof, and a refrigeration apparatus, wherein the heat exchange device comprises: a heat exchanger (1); a first air valve (2) arranged on one side of the heat exchanger (1) along a first direction (x) and configured to adjust an air volume passing through the heat exchanger (1), the first direction (x) being consistent with an air flow direction; a bypass air duct (3) arranged on a side of the heat exchanger (1) along a second direction (y) and perpendicular to the first direction (x); and a second air valve (4) configured to adjust an air volume passing through the bypass air duct (3); wherein the heat exchange device has a ventilation mode, in which the first air valve (2) is closed and the second air valve (4) is opened.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of heat exchange, and in particular, to a heat exchange device, a control method thereof, and a refrigeration equipment. BACKGROUND

[0002] When the unit needs to be refrigerated, the supply air passes through the surface cooler for heat exchange. In the transition season, the supply air still passes through the surface cooler even if the surface cooler is not used for heat exchange, which increases the pressure loss in the unit, has poor energy saving effect, and increases the power required by the motor for driving the fan. SUMMARY

[0003] Embodiments of the present disclosure provide a heat exchange device, a control method thereof, and a refrigeration equipment, which can improve the energy saving effect of the heat exchange device.

[0004] According to a first aspect of the present disclosure, a heat exchange device is provided, comprising:

[0005] a heat exchanger;

[0006] a first air valve arranged on one side of the heat exchanger in a first direction, configured to adjust the air volume passing through the heat exchanger, the first direction being consistent with the air flow direction;

[0007] a bypass air duct arranged on the side of the heat exchanger in a second direction, the second direction being perpendicular to the first direction; and

[0008] a second air valve configured to adjust the air volume passing through the bypass air duct;

[0009] wherein the heat exchange device has a ventilation mode, in which the first air valve is closed and the second air valve is opened.

[0010] In some embodiments, the heat exchange device also has a heat exchange mode, in which the first air valve is opened and the second air valve is closed.

[0011] In some embodiments, the heat exchanger comprises a heat exchange pipe, and the heat exchange pipe comprises a straight pipe section extending in a third direction, the third direction being perpendicular to the first direction and the second direction.

[0012] In some embodiments, in the third direction, the first air valve extends along the entire length of the heat exchanger, and / or the bypass air duct and the second air valve both extend along the entire length of the heat exchanger.

[0013] In some embodiments, a plurality of heat exchangers are arranged at intervals in the second direction, and each heat exchanger is provided with a corresponding first air valve, and a bypass air duct is arranged between each adjacent two heat exchangers.

[0014] In some embodiments, in the ventilation mode, all the first air valves are closed and all the second air valves are opened.

[0015] In some embodiments, the heat exchanger comprises a liquid inlet pipe and a heat exchange pipe, the liquid inlet pipe selectively introduces liquid refrigerant at a first temperature or a second temperature, the first temperature being higher than the second temperature.

[0016] In some embodiments, the heat exchange device further has a heat exchange mode, the heat exchange mode comprising an energy-saving refrigeration mode.

[0017] The heat exchange device further comprises a controller configured to, in a case where the required cooling capacity is not greater than a first preset cooling capacity, cause the heat exchange device to be in the energy-saving refrigeration mode, and only cause the first air valve corresponding to one heat exchanger to be opened and introduce liquid refrigerant at the first temperature; wherein the first preset cooling capacity is a maximum refrigeration capacity when the heat exchanger introduces liquid refrigerant at the first temperature.

[0018] In some embodiments, the heat exchanger is provided with a plurality of heat exchangers, and the heat exchange device further has a heat exchange mode, the heat exchange mode comprising an energy-saving refrigeration mode.

[0019] The heat exchange device further comprises a controller configured to, in a case where the required cooling capacity is greater than a first preset cooling capacity and less than a second preset cooling capacity, cause the heat exchange device to be in the energy-saving refrigeration mode, and adjust the number of heat exchangers in the working state and the opening degree of the first air valve, and the heat exchanger in the working state introduces liquid refrigerant at the first temperature, so that the actual cooling capacity meets the required cooling capacity; wherein the first preset cooling capacity is a maximum refrigeration capacity when the heat exchanger introduces liquid refrigerant at the first temperature, and the second preset cooling capacity is greater than the first preset cooling capacity.

[0020] In some embodiments, the heat exchanger is provided with a plurality of heat exchangers, and the heat exchange device further has a heat exchange mode, the heat exchange mode comprising a performance refrigeration mode.

[0021] The heat exchange device further comprises a controller configured to, in a case where the required cooling capacity is not less than a second preset cooling capacity, cause the heat exchange device to be in the performance refrigeration mode, and adjust the number of heat exchangers in the working state and the opening degree of the first air valve, and the heat exchanger in the working state introduces liquid refrigerant at the second temperature, so that the actual cooling capacity meets the required cooling capacity; wherein the second preset cooling capacity is greater than a maximum refrigeration capacity when the heat exchanger introduces liquid refrigerant at the first temperature.

[0022] According to a second aspect of the present disclosure, a refrigeration device is provided, comprising the heat exchange device of the above-mentioned embodiments.

[0023] In some embodiments, the refrigeration device is a wind cabinet.

[0024] According to a third aspect of the present disclosure, a control method based on the heat exchange device of the above-mentioned embodiments is provided, comprising:

[0025] In the ventilation mode, the first air valve is closed, and the second air valve is opened.

[0026] In some embodiments, the heat exchange device also has a refrigeration mode, and the control method further comprises:

[0027] In the refrigeration mode, the first air valve is opened, and the second air valve is closed.

[0028] In some embodiments, the heat exchange device comprises a plurality of heat exchangers arranged at intervals along the second direction, each heat exchanger is provided with a first air valve, and a bypass air channel is arranged between each adjacent two heat exchangers; in the ventilation mode, the first air valve is closed, and the second air valve is opened, specifically comprising:

[0029] In the ventilation mode, all the first air valves are closed, and all the second air valves are opened.

[0030] In some embodiments, the heat exchanger comprises a liquid inlet pipe, the liquid inlet pipe selectively introduces liquid refrigerant at a first temperature or a second temperature, the first temperature is higher than the second temperature; and the control method further comprises:

[0031] Obtaining a required cooling capacity according to a temperature set by a user;

[0032] Determining whether to introduce liquid refrigerant at the first temperature or the second temperature into the heat exchanger according to the required cooling capacity.

[0033] In some embodiments, the heat exchange device also has a heat exchange mode, and the heat exchange mode comprises an energy-saving refrigeration mode; the control method further comprises:

[0034] In a case where the required cooling capacity is not greater than a first preset cooling capacity, the heat exchange device is in the energy-saving refrigeration mode, and only the first air valve corresponding to one heat exchanger is opened and introduces liquid refrigerant at the first temperature; wherein the first preset cooling capacity is a maximum cooling capacity when the heat exchanger introduces liquid refrigerant at the first temperature.

[0035] In some embodiments, the heat exchange device also has a heat exchange mode, and the heat exchange mode comprises an energy-saving refrigeration mode; the control method further comprises:

[0036] In a case where the required cooling capacity is greater than the first preset cooling capacity and less than a second preset cooling capacity, the heat exchange device is in the energy-saving refrigeration mode, and the number of heat exchangers in operation and the opening degree of the first air valve are adjusted, and the heat exchanger in operation introduces liquid refrigerant at the first temperature, so that the actual cooling capacity meets the required cooling capacity; wherein the first preset cooling capacity is a maximum cooling capacity when the heat exchanger introduces liquid refrigerant at the first temperature, and the second preset cooling capacity is greater than the first preset cooling capacity.

[0037] In some embodiments, the heat exchange device also has a heat exchange mode, and the heat exchange mode comprises a performance refrigeration mode; the control method further comprises:

[0038] In a case where the required cold quantity is not less than a second preset cold quantity, the heat exchange device is in a performance refrigeration mode, and the number of heat exchangers in operation and the opening degree of the first air valve are adjusted, and the heat exchangers in operation are supplied with liquid refrigerant at a second temperature, so that the actual cold quantity meets the required cold quantity; wherein the second preset cold quantity is greater than the maximum refrigeration capacity when the heat exchanger is supplied with liquid refrigerant at a first temperature.

[0039] The heat exchange device of the embodiment of the present disclosure can reduce the operation energy consumption of the fan and improve the energy saving effect by arranging the bypass air duct on the side of the heat exchanger and arranging the second air valve in the bypass air duct, and in the ventilation mode, the first air valve is closed and the second air valve is opened, so that the airflow directly passes through the bypass air duct with small resistance without passing through the heat exchanger. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate certain illustrative embodiments of the present disclosure and are used to explain the present disclosure, but do not limit the present disclosure. In the drawings:

[0041] Figure 1 Some embodiment structure schematic diagrams of the heat exchange device of the present disclosure.

[0042] Figure 2 Some embodiment front views of the heat exchange device of the present disclosure.

[0043] Figure 3 Some embodiment side views of the heat exchange device of the present disclosure.

[0044] Figure 4 Some embodiment flowcharts of the heat exchange device control method of the present disclosure.

[0045] BRIEF DESCRIPTION OF DRAWINGS

[0046] 1, heat exchanger; 11, heat exchange pipe; 111, straight pipe section; 112, elbow pipe section; 12, liquid inlet pipe; 13, liquid outlet pipe; 14, connecting pipe; 2, first air valve; 3, bypass air duct; 4, second air valve; x, first direction; y, second direction; z, third direction. DETAILED DESCRIPTION

[0047] The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect thus defined can be combined with any other aspect or aspects, unless explicitly stated otherwise. In particular, any feature described as preferred or advantageous can be combined with any other feature or features described as preferred or advantageous.

[0048] The terms "first", "second", and the like in the present disclosure are merely intended to facilitate the description, to distinguish different components with the same name, and do not indicate or imply a precedence or a primary and secondary relationship.

[0049] In addition, when an element is referred to as being "on" another element, the element can be directly on the other element, or can be indirectly on the other element with one or more intervening elements interposed therebetween. In addition, when an element is referred to as being "connected to" another element, the element can be directly connected to the other element, or can be indirectly connected to the other element with one or more intervening elements interposed therebetween. Hereinafter, like reference numerals denote like elements.

[0050] The descriptions of the orientations or positional relationships such as "upper", "lower", "top", "bottom", "front", "back", "inner", and "outer" in the present disclosure are merely intended to facilitate the description of the present disclosure, and do not indicate or imply that the device referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present disclosure.

[0051] As shown in FIG. 1, Figures 1 to 3 The present disclosure provides a heat exchange device, which in some embodiments includes a heat exchanger 1, a first air valve 2, a bypass air duct 3, and a second air valve 4.

[0052] The heat exchanger 1 can be a surface cooler, and has a heat exchange pipe 11, an inlet pipe 12, and an outlet pipe 13. The inlet pipe 12 is in communication with one end of the heat exchange pipe 11, and is configured to allow the liquid coolant flowing in to exchange heat with the gas flowing through the surface cooler, and the liquid coolant after the heat exchange flows out from the outlet pipe 13. A connecting pipe 14 can be arranged between the inlet pipe 12 and the outlet pipe 13 to improve the installation reliability of the inlet pipe 12 and the outlet pipe 13. The heat exchange can be refrigeration or heating.

[0053] The first air valve 2 is arranged on one side of the heat exchanger 1 along a first direction x, and is configured to adjust the air volume passing through the heat exchanger 1. The first direction x is consistent with the air flow direction. For example, the first air valve 2 is provided with a plurality of blades, and the air flow passage size is adjusted by the rotation of the blades to change the air volume passing through the heat exchanger 1. The first air valve 2 and the heat exchanger 1 can be designed as a cuboid structure, and in a plane perpendicular to the first direction x, the sizes of the first air valve 2 and the heat exchanger 1 can be the same, so that the air flow uniformly passes through each area of the heat exchanger 1 for heat exchange, improving the heat exchange effect.

[0054] The bypass air duct 3 is arranged on the side of the heat exchanger 1 along a second direction y, and the second direction y is perpendicular to the first direction x. For example, the size of the bypass air duct 3 along the first direction x can be consistent with that of the heat exchanger 1 and flush with the side surface.

[0055] The second air valve 4 is arranged in the bypass air duct 3 and is configured to adjust the air volume passing through the bypass air duct 3. For example, the second air valve 4 is provided with a plurality of blades, and the air flow passage size is adjusted by rotating the blades to change the air volume passing through the bypass air duct 3.

[0056] In the ventilation mode, the first air valve 2 is closed to prevent the air flow from passing through the heat exchanger 1, and the second air valve 4 is opened to allow the air flow to pass through the bypass air duct 3.

[0057] In the ventilation mode, the first air valve 2 is closed to prevent the air flow from passing through the heat exchanger 1, and the second air valve 4 is opened to allow the air flow to pass through the bypass air duct 3.

[0058] In the ventilation mode, the first air valve 2 is closed to prevent the air flow from passing through the heat exchanger 1, and the second air valve 4 is opened to allow the air flow to pass through the bypass air duct 3.

[0059] In the ventilation mode, the first air valve 2 is closed to prevent the air flow from passing through the heat exchanger 1, and the second air valve 4 is opened to allow the air flow to pass through the bypass air duct 3.

[0060] Optionally, when the unit is not needed to work, the first air valve 2 and the second air valve 4 can be closed to keep the unit inside clean.

[0061] In some embodiments, as shown in FIG. 1, the heat exchanger 1 includes a heat exchange pipe 11, and the heat exchange pipe 11 includes a straight pipe segment 111 extending along a third direction z perpendicular to the first direction x and the second direction y. Figure 1

[0062] ​The embodiment can make the bypass air duct 3 not affect the air flow through the heat exchanger 1 in the heat exchange mode, and not affect the installation of the heat exchanger 1.

[0063] In some embodiments, in the third direction z, the first air valve 2 extends along the entire length of the heat exchanger 1, and / or the bypass air duct 3 and the second air valve 4 both extend along the entire length of the heat exchanger 1.

[0064] In the embodiment, the first air valve 2 extends along the entire length of the heat exchanger 1, which can increase the air inlet range and make the air flow more uniformly through the heat exchanger 1 in the third direction z, thereby improving the heat exchange efficiency. The bypass air duct 3 extends along the entire length of the heat exchanger 1, which can increase the range of air flow through the bypass air duct 3 without increasing the overall size of the heat exchange device in the third direction z, thereby improving the ventilation efficiency and making the air flow more uniformly through the bypass air duct 3 in the third direction z. The second air valve 4 extends along the entire length of the heat exchanger 1, which can increase the air inlet range during ventilation and make the air flow uniformly through the entire length of the bypass air duct 3, thereby making the ventilation effect more uniform.

[0065] In some embodiments, the heat exchange device includes a plurality of heat exchangers 1 arranged at intervals in the second direction y, for example, two or more heat exchangers 1 are arranged, and one first air valve 2 is arranged corresponding to each heat exchanger 1, and a bypass air duct 3 is arranged between each adjacent two heat exchangers 1. For example, the plurality of heat exchangers 1 are arranged in a splicing manner, and the heat exchanger 1 and the bypass air duct 3 are detachable, so as to flexibly select the number of heat exchangers 1 according to the demand, and facilitate expansion.

[0066] The embodiment can improve the heat exchange capacity and make the heat exchange of the heat exchange device more uniform in the second direction y by arranging a plurality of heat exchangers 1, and a bypass air duct 3 is arranged between each adjacent two heat exchangers 1, which can simultaneously ventilate through a plurality of bypass air ducts 3, thereby not only improving the ventilation efficiency, but also making the ventilation of the heat exchange device more uniform in the second direction y.

[0067] For this structure, in the ventilation mode, all the first air valves 2 are closed to prevent the air flow through the heat exchangers 1, thereby reducing the power consumption, and all the second air valves 4 are opened to allow the air flow to pass through the bypass air ducts 3 to ventilate simultaneously, thereby improving the ventilation efficiency and the uniformity of the air flow during ventilation.

[0068] In some embodiments, as shown in Figure 2 and Figure 3 The heat exchanger 1 includes a liquid inlet pipe 12, which selectively introduces liquid refrigerant at a first temperature or a second temperature, and the first temperature is higher than the second temperature.

[0069] For example, the liquid coolant at the first temperature can be medium-temperature water, the inlet water temperature is 9°C, and the outlet water temperature is 15°C after heat exchange. For example, the maximum refrigerating capacity of a single heat exchanger 1 under the condition of 5000 air volume is 32.2kw. The liquid coolant at the second temperature can be normal-temperature water, the inlet water temperature is 7°C, and the outlet water temperature is 12°C after heat exchange. For example, the maximum refrigerating capacity of a single heat exchanger 1 under the condition of 5000 air volume is 22.56kw.

[0070] The first temperature and the second temperature can be selected by the hand controller, and the temperature range required by the user can also be set by the hand controller. The cooling capacity required by the heat exchange device can be obtained according to the temperature range required by the user.

[0071] The heat exchange device of this embodiment can introduce liquid coolants at different temperatures into the heat exchanger 1. Under the condition of a certain heat exchange area, a single heat exchanger 1 can achieve different refrigerating capacities. Therefore, the adjustment range of the cooling capacity during heat exchange can be increased, and the heat exchange requirements of the user in different seasons and under different loads can be more flexibly met, and the adaptability of the user to a larger range of requirements can be improved.

[0072] This heat exchange device is particularly suitable for refrigeration. During the heat exchange process of the heat exchanger 1, a large amount of condensate water is generated, which affects the refrigeration efficiency. When the required cooling capacity is small, a liquid coolant at the first temperature with a higher temperature can be introduced into the heat exchanger. By increasing the temperature of the liquid coolant, the generation of condensate water can be reduced, the heat exchange efficiency of the heat exchanger 1 can be improved, and the energy loss can be reduced.

[0073] In some embodiments, the heat exchange device also has a heat exchange mode, and the heat exchange mode includes an energy-saving refrigeration mode. The heat exchange device also includes a controller configured to, in the case that the required cooling capacity is not greater than a first preset cooling capacity, make the heat exchange device in the energy-saving refrigeration mode, and only make the first air valve 2 corresponding to one heat exchanger 1 open and pass in the liquid coolant at the first temperature. The first preset cooling capacity is the maximum refrigerating capacity of the heat exchanger 1 when the liquid coolant at the first temperature is passed in. The opening degree of the first air valve 2 can be adjusted according to the temperature set by the user, so that the actual cooling capacity meets the required cooling capacity.

[0074] This embodiment can open only one heat exchanger 1 for heat exchange when the required cooling capacity is not greater than the maximum refrigerating capacity of a single heat exchanger 1 when the liquid coolant at the first temperature is passed in, and the other heat exchangers 1 are in a closed state. This can meet the refrigerating capacity requirement, reduce the energy loss of the heat exchange device, and improve the energy-saving effect.

[0075] In some embodiments, the heat exchanger 1 is provided with multiple heat exchangers, and the heat exchange device further has a heat exchange mode, which includes an energy-saving refrigeration mode; the heat exchange device further includes a controller configured to, in the case that the required cooling capacity is greater than a first preset cooling capacity and less than a second preset cooling capacity, cause the heat exchange device to be in the energy-saving refrigeration mode, and adjust the number of heat exchangers 1 in operation and the opening degree of the first air valve 2, and cause the heat exchangers 1 in operation to pass in liquid refrigerant at the first temperature, so that the actual cooling capacity meets the required cooling capacity; wherein the first preset cooling capacity is the maximum refrigeration capacity when the heat exchanger 1 passes in liquid refrigerant at the first temperature, and the second preset cooling capacity is greater than the first preset cooling capacity, for example, the second preset cooling capacity can be twice the first preset cooling capacity.

[0076] In the case that the required cooling capacity is not greater than the maximum refrigeration capacity that a single heat exchanger 1 can achieve when passing in liquid refrigerant at the first temperature, and the required cooling capacity is not too large, the opening of one heat exchanger 1 cannot meet the required cooling capacity, the required cooling capacity can be obtained according to the temperature set by the user, and a proper number of heat exchangers 1 are caused to exchange heat at the same time, and the opening degree of the first air valve 2 corresponding to each heat exchanger 1 is adjusted in the heat exchange process, so that the required cooling capacity can be met, and the energy consumption of the heat exchange device can be reduced, and the energy-saving effect can be improved. Moreover, by introducing liquid refrigerant at the first temperature into the heat exchanger 1, the cooling capacity adjustment range of the user can be met, and the generation of condensate water can be reduced to ensure the heat exchange efficiency.

[0077] In some embodiments, the heat exchanger 1 is provided with multiple heat exchangers, and the heat exchange device further has a heat exchange mode, which includes a performance refrigeration mode; the heat exchange device further includes a controller configured to, in the case that the required cooling capacity is not less than a second preset cooling capacity, cause the heat exchange device to be in the performance refrigeration mode, and adjust the number of heat exchangers 1 in operation and the opening degree of the first air valve 2, and cause the heat exchangers 1 in operation to pass in liquid refrigerant at the second temperature, so that the actual cooling capacity meets the required cooling capacity; wherein the second preset cooling capacity is greater than the maximum refrigeration capacity when the heat exchanger 1 passes in liquid refrigerant at the first temperature.

[0078] In the case that the required cooling capacity is not greater than the maximum refrigeration capacity that a single heat exchanger 1 can achieve when passing in liquid refrigerant at the first temperature, and the required cooling capacity is relatively large, first, liquid refrigerant at a second temperature with a lower temperature is introduced into the heat exchanger 1 to increase the refrigeration capacity that a single heat exchanger 1 can achieve, and increase the adjustable range of the cooling capacity; second, the required cooling capacity can be obtained according to the temperature set by the user, and a proper number of heat exchangers 1 are caused to exchange heat at the same time, and the opening degree of the first air valve 2 corresponding to each heat exchanger 1 is adjusted in the heat exchange process, so that the required cooling capacity can be met, and the energy consumption of the heat exchange device can be reduced, and the energy-saving effect can be improved.

[0079] For example, when the required cooling capacity is large, all the first air valves 2 can be opened, and the liquid refrigerant at the second temperature can be supplied to all the heat exchangers 1, so as to increase the achievable cooling capacity and increase the cooling capacity adjustment range.

[0080] Secondly, the present disclosure provides a refrigeration device comprising the above-mentioned embodiments.

[0081] Such a refrigeration device has at least the following advantages:

[0082] 1. In the ventilation mode, the pressure loss of the gas flow can be reduced, the operating energy consumption of the fan can be reduced, the energy saving effect can be improved, and the ventilation mode is suitable for use in the case that the heat exchanger 1 is not needed to be used for heat exchange in the transition season. Moreover, the refrigeration device can be conveniently switched between the heat exchange mode and the ventilation mode.

[0083] 2. When the refrigeration device is in the refrigeration mode, the liquid refrigerant at the first temperature or the second temperature can be selected to be supplied to the heat exchanger 1 according to the required cooling capacity, or the number of heat exchangers 1 in the working state can be selected, or the opening degree of each first air valve 2 can be adjusted, so that the actual cooling capacity meets the required cooling capacity, the required cooling capacity at the user-set temperature can be met, the cooling capacity adjustment range can be increased, the energy loss can be reduced, and the energy saving effect can be improved.

[0084] In some embodiments, the refrigeration device is a wind cabinet. The plurality of heat exchangers 1 can be arranged at intervals along the second direction y, and the second direction y is the height direction. Such a structure can make the heat exchange of the wind cabinet uniform in each area along the height direction in the heat exchange mode, and improve the heat exchange efficiency of the wind cabinet; and make the ventilation uniform in each area along the height direction in the ventilation mode.

[0085] Secondly, the present disclosure provides a control method based on the heat exchange device of the above-mentioned embodiments, and in some embodiments, the control method comprises:

[0086] In the ventilation mode, the first air valve 2 is closed, and the second air valve 4 is opened.

[0087] This step can be realized by sending the air valve control instruction to the air valve actuator by the controller, and controlling the first air valve 2 and the second air valve 4 to act by the air valve actuator.

[0088] The control method of this embodiment can make the gas flow directly pass through the bypass air duct 3 with small resistance without passing through the fins in the heat exchanger 1 in the ventilation mode, can reduce the pressure loss of the gas flow, can reduce the operating energy consumption of the fan, can improve the energy saving effect, and the ventilation mode is suitable for use in the case that the heat exchanger 1 is not needed to be used for heat exchange in the transition season. Moreover, through the combined control of the first air valve 2 and the second air valve 4, the heat exchange device can be conveniently switched to the ventilation mode, and the control is easy and reliable.

[0089] In some embodiments, the heat exchange device further has a heat exchange mode, and the control method further comprises:

[0090] In the heat exchange mode, the first air valve 2 is opened, and the second air valve 4 is closed.

[0091] This embodiment can make the heat exchange device enter the heat exchange mode by combined control of the air valves when heat exchange is needed, so as to meet the cooling or heating demand of the user, for example, the heat exchange mode is the cooling mode in summer and the heating mode in winter. Such a heat exchange device can realize flexible switching between the heat exchange mode and the ventilation mode by controlling the first air valve 2 and the second air valve 4, so as to meet the heat exchange demand and reduce the energy consumption of the fan in the transition season, thereby achieving the energy saving effect.

[0092] In some embodiments, the heat exchange device comprises a plurality of heat exchangers 1 arranged at intervals along the second direction y, each heat exchanger 1 is provided with a first air valve 2, and a bypass air duct 3 is arranged between each adjacent two heat exchangers 1; in the ventilation mode, the first air valve 2 is closed, and the second air valve 4 is opened, specifically comprising:

[0093] In the ventilation mode, all the first air valves 2 are closed, and all the second air valves 4 are opened.

[0094] This embodiment can close all the first air valves 2 in the ventilation mode to prevent air flow from passing through each heat exchanger 1, thereby reducing power consumption, and open all the second air valves 4 to allow air flow to pass through each bypass air duct 3 at the same time, thereby improving ventilation efficiency and improving the uniformity of air flow ventilation.

[0095] In some embodiments, the heat exchanger 1 comprises a liquid inlet pipe 12, the liquid inlet pipe 12 selectively introduces liquid refrigerant at a first temperature or a second temperature, the first temperature is higher than the second temperature, and the control method further comprises:

[0096] Obtaining the required cooling capacity according to the temperature set by the user;

[0097] Determining whether to introduce liquid refrigerant at the first temperature or the second temperature into the heat exchanger 1 according to the required cooling capacity.

[0098] This embodiment selectively introduces liquid refrigerant at different temperatures into the heat exchanger 1, so that a single heat exchanger 1 can realize different cooling capacities under the condition of a certain heat exchange area, thereby increasing the adjustment range of cooling capacity during heat exchange, more flexibly meeting the heat exchange demand of the user under different seasons and different loads, and improving the adaptability of the user to a larger range of requirements.

[0099] In some embodiments, with reference to Figure 4 , the heat exchange device further has a heat exchange mode, and the heat exchange mode comprises an energy-saving cooling mode; the control method further comprises:

[0100] In the case that the required cooling capacity is not greater than the first preset cooling capacity, the heat exchange device is in the energy-saving refrigeration mode, and only one heat exchanger 1 corresponding to the first air valve 2 is opened and the liquid coolant at the first temperature is introduced; wherein the first preset cooling capacity is the maximum refrigeration capacity when the heat exchanger 1 introduces the liquid coolant at the first temperature.

[0101] This embodiment can open only one heat exchanger 1 for heat exchange in the case that the required cooling capacity is not greater than the maximum refrigeration capacity that a single heat exchanger 1 can reach when introducing the liquid coolant at the first temperature, and the other heat exchangers 1 are in the closed state, which can meet the refrigeration capacity requirement, reduce the energy consumption of the heat exchange device, and improve the energy-saving effect.

[0102] In some embodiments, with reference to Figure 4 , the heat exchange device further has a heat exchange mode, and the heat exchange mode includes the energy-saving refrigeration mode; the control method further includes:

[0103] In the case that the required cooling capacity is greater than the first preset cooling capacity and less than the second preset cooling capacity, the heat exchange device is in the energy-saving refrigeration mode, and the number of heat exchangers 1 in the working state and the opening degree of the first air valve 2 are adjusted, and the heat exchangers 1 in the working state introduce the liquid coolant at the first temperature, so that the actual cooling capacity meets the required cooling capacity; wherein the first preset cooling capacity is the maximum refrigeration capacity when the heat exchanger 1 introduces the liquid coolant at the first temperature, and the second preset cooling capacity is greater than the first preset cooling capacity.

[0104] This embodiment can open only one heat exchanger 1 for heat exchange in the case that the required cooling capacity is not greater than the maximum refrigeration capacity that a single heat exchanger 1 can reach when introducing the liquid coolant at the first temperature, and the other heat exchangers 1 are in the closed state, which can meet the refrigeration capacity requirement, reduce the energy consumption of the heat exchange device, and improve the energy-saving effect.

[0105] In some embodiments, with reference to Figure 4 , the heat exchange device further has a heat exchange mode, and the heat exchange mode includes the energy-saving refrigeration mode; the control method further includes:

[0106] In the case that the required cooling capacity is not less than the second preset cooling capacity, the heat exchange device is in the performance refrigeration mode, and the number of heat exchangers 1 in the working state and the opening degree of the first air valve 2 are adjusted, and the heat exchangers 1 in the working state introduce the liquid coolant at the second temperature, so that the actual cooling capacity meets the required cooling capacity; wherein the second preset cooling capacity is greater than the maximum refrigeration capacity when the heat exchanger 1 introduces the liquid coolant at the first temperature.

[0107] The embodiment is used in the case that the required cooling capacity is greater than the maximum cooling capacity of a single heat exchanger 1 under the condition of passing in liquid refrigerant at the first temperature. First, the second liquid refrigerant at a lower temperature is introduced into the heat exchanger 1 to increase the cooling capacity of the single heat exchanger 1 and increase the adjustable range of the cooling capacity. Second, the required cooling capacity can be obtained according to the temperature set by the user, and the required cooling capacity is used to make a proper number of heat exchangers 1 exchange heat at the same time, and the opening of the first air valve 2 corresponding to each heat exchanger 1 is adjusted during the heat exchange process. The required cooling capacity can be met, and the energy consumption of the heat exchange device can be reduced, and the energy-saving effect can be improved.

[0108] The working principle of the heat exchange device of the present disclosure will be described in detail below. Figures 1 to 4

[0109] The heat exchange device includes a plurality of heat exchangers 1 arranged at intervals along a second direction y, and the second direction y can be a height direction. For example, three heat exchangers 1 can be provided. The heat exchange device has a ventilation mode and a heat exchange mode, and the heat exchange mode is described by taking the refrigeration mode as an example.

[0110] 1. In the transition season, the ventilation mode is selected, all the first air valves 2 are closed, and all the second air valves 4 are opened. At this time, the heat exchanger 1 does not need to work, and the air flow directly passes through the internal unit of the bypass air duct 3. At this time, the air flow passes between two heat exchangers, and the pressure loss in the air flow process is reduced, thereby reducing the motor power and reducing the energy consumption of the unit, so as to achieve the purpose of energy saving.

[0111] 2. In the refrigeration mode, two water inlet temperatures can be selected, normal temperature water 7℃ / 12℃ and medium temperature water 9℃ / 15℃. The user can set the temperature range and the inlet and outlet water temperature through the hand controller to determine the cooling capacity and the loss. For example, the maximum cooling capacity of a single heat exchanger 1 under the condition of 5000 air volume (normal temperature water) is 32.2kw, and the maximum cooling capacity of a single heat exchanger 1 under the same air volume and the same inlet air condition (medium temperature water) is 22.56KW. When the maximum cooling capacity is obtained, the air blade of the first air valve 2 should be adjusted to be consistent with the return air direction.

[0112] The refrigeration mode can include two modes: energy-saving refrigeration mode and performance refrigeration mode. Before selecting the refrigeration mode, the user can set the temperature through the hand controller, and the program software in the controller can automatically calculate the required cooling capacity to reach the temperature set by the user, and select the refrigeration mode according to the required cooling capacity.

[0113] It is judged whether the required cooling capacity is greater than the first preset cooling capacity, that is, whether it is greater than 22.56KW. According to the condition judgment, the following working modes can be selected.

[0114] ​If the required cooling capacity is not greater than the first preset cooling capacity, the unit is automatically switched to the energy-saving refrigeration mode, which can also be manually switched, only the first air valve 2 of one heat exchanger 1 is opened, and the opening degree of the first air valve 2 is adjusted according to the required cooling capacity.

[0115] If the required cooling capacity is greater than the first preset cooling capacity, it is further judged whether the required cooling capacity is less than the second preset cooling capacity, which is greater than the first preset cooling capacity.

[0116] If the required cooling capacity is greater than the first preset cooling capacity and less than the second preset cooling capacity, the unit enters the energy-saving refrigeration mode, the number of heat exchangers 1 in working state and the opening degree of the first air valve 2 are adjusted to change the air intake of the unit to change the cooling capacity output, and the heat exchanger 1 in working state is connected to the liquid coolant at the first temperature (9 / 15℃ medium temperature water) to make the actual cooling capacity meet the required cooling capacity. Optionally, temperature sensing bags are installed on the inlet and outlet liquid pipes 12 and 13, for example, when the detected temperature is 9±0.1℃ / 15±0.1℃, the system uses 9 / 15℃ medium temperature water, automatically calculates the required heat exchange capacity and transmits the signal to the air valve actuator through Bluetooth, and adjusts the opening degree of the first air valve 2 to realize adjustable cooling capacity. In the energy-saving refrigeration mode, the water resistance of the medium temperature water is reduced by nearly 75% compared with the normal temperature water under the same working condition, which can reduce the energy consumption and meet the required cooling capacity.

[0117] If the required cooling capacity is not less than the second preset cooling capacity, the unit enters the performance refrigeration mode, the number of heat exchangers 1 in working state and the opening degree of the first air valve 2 are adjusted, and the heat exchanger 1 in working state is connected to the liquid coolant at the second temperature (7 / 12℃ normal temperature water) to make the actual cooling capacity meet the required cooling capacity and improve the adjustable range of the cooling capacity. For example, when using medium temperature water 9 / 15℃, the heat exchange capacity of the unit under standard conditions is 45.12KW for 10000 air volume, but when the dry pipe is used for normal temperature water 7 / 12℃, if the same heat exchange capacity is required, the heat exchange area will be reduced, and the ratio is 1:0.64. By controlling the opening degree of the first air valve 2, the heat exchange air intake can be controlled to meet the self-adaptive adjustment under different seasons and different loads. In the performance refrigeration mode, the output cooling capacity is larger, but the energy consumption also increases.

[0118] The above describes in detail a heat exchange device and its control method, and a refrigeration equipment provided by the present disclosure. The principles and implementation manners of the present disclosure are described by applying specific examples, and the above example description is only used to help understand the method and core idea of the present disclosure. It should be noted that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present disclosure without departing from the principles of the present disclosure, and these improvements and modifications also fall within the protection scope of the claims of the present disclosure.

Claims

1. A heat exchange device, characterized in that, include: Multiple heat exchangers (1); Multiple first air valves (2) are provided on one side of the heat exchanger (1) along a first direction (x) and are configured to regulate the air volume passing through the heat exchanger (1), wherein the first direction (x) is consistent with the airflow direction; A bypass ventilation duct (3) is provided on the side of the heat exchanger (1) along a second direction (y), the second direction (y) being perpendicular to the first direction (x); and The second air valve (4) is configured to regulate the airflow through the bypass duct (3); The heat exchange device has a ventilation mode and a heat exchange mode. In the ventilation mode, the first air valve (2) is closed and the second air valve (4) is open. In the heat exchange mode, the first air valve (2) is open and the second air valve (4) is closed. Among them, a plurality of heat exchangers (1) are arranged at intervals along the second direction (y), each heat exchanger (1) is provided with a first air valve (2), and a bypass air duct (3) is provided between each two adjacent heat exchangers (1). The heat exchanger (1) includes a liquid inlet pipe (12), which can be selectively supplied with a liquid refrigerant at a first temperature or a second temperature, wherein the first temperature is higher than the second temperature. The number of heat exchangers (1) in operation and the opening degree of the first air valve (2) are configured to ensure that the actual cooling capacity meets the required cooling capacity. The opening degree of the first air valve (2) corresponding to each heat exchanger (1) is adjusted during the heat exchange process. The heat exchange device also has heat exchange modes, including a first energy-saving cooling mode, a second energy-saving cooling mode, and a performance-based cooling mode; the heat exchange device also includes a controller; wherein... The controller is configured to: When the required cooling capacity is not greater than the first preset cooling capacity, the heat exchange device is put into the first energy-saving cooling mode, and only the first air valve (2) corresponding to one of the heat exchangers (1) is opened and liquid refrigerant at the first temperature is introduced; wherein, the first preset cooling capacity is the maximum cooling capacity when liquid refrigerant at the first temperature is introduced into a single heat exchanger (1); When the required cooling capacity is greater than the first preset cooling capacity but less than the second preset cooling capacity, the heat exchange device is put into the second energy-saving cooling mode, and the number of the heat exchangers (1) in operation and the opening of the first air valve (2) are adjusted. Liquid refrigerant at the first temperature is introduced into the heat exchangers (1) in operation so that the actual cooling capacity meets the required cooling capacity. Wherein, the second preset cooling capacity is greater than the first preset cooling capacity. When the required cooling capacity is not less than the second preset cooling capacity, the heat exchange device is put into the performance cooling mode, and the number of the heat exchangers (1) in the working state and the opening of the first air valve (2) are adjusted. The heat exchangers (1) in the working state are introduced with liquid refrigerant at the second temperature so that the actual cooling capacity meets the required cooling capacity.

2. The heat exchange device according to claim 1, characterized in that, The heat exchanger (1) includes a heat exchange tube (11), which includes a straight tube section (111) extending along a third direction (z), which is perpendicular to the first direction (x) and the second direction (y).

3. The heat exchange device according to claim 2, characterized in that, On the third direction (z), the first air valve (2) extends along the entire length of the heat exchanger (1), and / or the bypass duct (3) and the second air valve (4) both extend along the entire length of the heat exchanger (1).

4. The heat exchange device according to claim 1, characterized in that, In the ventilation mode, all the first air valves (2) are closed and all the second air valves (4) are open.

5. A refrigeration device, characterized in that, include: The heat exchange device according to any one of claims 1 to 4.

6. The refrigeration equipment according to claim 5, characterized in that, The refrigeration equipment is a blower unit.

7. A control method based on the heat exchange device according to any one of claims 1 to 4, characterized in that, include: In the ventilation mode, the first air valve (2) is closed and the second air valve (4) is opened; In the heat exchange mode, the first air valve (2) is opened and the second air valve (4) is closed, and the required cooling capacity is obtained according to the temperature set by the user. Based on the required cooling capacity, liquid refrigerant at a first temperature or a second temperature is introduced into the heat exchanger (1). The control method under the heat exchange mode includes: When the required cooling capacity is not greater than the first preset cooling capacity, the heat exchange device is put into the first energy-saving cooling mode, and only the first air valve (2) corresponding to one of the heat exchangers (1) is opened and liquid refrigerant at the first temperature is introduced; wherein, the first preset cooling capacity is the maximum cooling capacity when liquid refrigerant at the first temperature is introduced into a single heat exchanger (1); When the required cooling capacity is greater than the first preset cooling capacity but less than the second preset cooling capacity, the heat exchange device is put into the second energy-saving cooling mode, and the number of the heat exchangers (1) in operation and the opening of the first air valve (2) are adjusted. Liquid refrigerant at the first temperature is introduced into the heat exchangers (1) in operation so that the actual cooling capacity meets the required cooling capacity. Wherein, the second preset cooling capacity is greater than the first preset cooling capacity. When the required cooling capacity is not less than the second preset cooling capacity, the heat exchange device is put into the performance cooling mode, and the number of the heat exchangers (1) in the working state and the opening of the first air valve (2) are adjusted. The heat exchangers (1) in the working state are introduced with liquid refrigerant at the second temperature so that the actual cooling capacity meets the required cooling capacity.

8. The control method according to claim 7, characterized in that, The heat exchange device includes a plurality of heat exchangers (1) spaced apart along the second direction (y), each heat exchanger (1) corresponding to a first air valve (2), and a bypass ventilation duct (3) is provided between each two adjacent heat exchangers (1); in the ventilation mode, closing the first air valve (2) and opening the second air valve (4) specifically includes: In the ventilation mode, all the first air valves (2) are closed and all the second air valves (4) are opened.

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