Control method and system of waste heat recovery refrigerating system and waste heat recovery air conditioner

Abstract

The invention provides a control method and system of a waste heat recovery refrigerating system and a waste heat recovery air conditioner, and the control method comprises the steps that according to the heating requirement of a workshop, a workshop heat exchanger communicates with an equipment room heat exchanger in an equipment room, the workshop heat exchanger conducts heating in the workshop, and a workshop subsystem starts a heating mode; monitoring the refrigeration effect of the equipment room; and the heat exchange efficiency of the outdoor heat exchanger is adjusted according to the refrigeration effect of the equipment room. Specifically, in the waste heat recovery refrigerating system, the second flow path is connected with the first flow path and the equipment room heat exchanger in parallel, the outdoor heat exchanger is arranged on the first flow path, and the workshop heat exchanger is arranged on the second flow path. According to the control method, the technical problem that an equipment room air conditioner with a waste heat recovery function in the related technology cannot meet the requirements of guaranteeing the environment stability of an equipment room and improving the heating comfort of a workshop at the same time is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery air conditioners, and in particular to a control method and system for a waste heat recovery refrigeration system and a waste heat recovery air conditioner. Background Art

[0002] Since special places such as equipment rooms have a continuous and stable heat source, they still need to be cooled in winter, and the attached workrooms need to provide heat in winter to meet the comfort needs of personnel activities. When the air conditioner in the equipment room is cooling, it will release a lot of heat to the outdoors, and in winter this part of heat can be used to meet the comfort needs of personnel in the workroom.

[0003] For combined heat and cooling air conditioners with waste heat recovery, the main task during operation is still to meet the cooling demand of the equipment room. When the load of the equipment room remains constant, the compressor frequency and other factors are in a stable state, so the heat that the workroom can obtain is also relatively constant. However, as a place for personnel activities, the demand for comfort in the workroom is in a changing state, and changes in the workroom environment will indirectly affect the heating amount output by the air conditioner in the equipment room. Therefore, the operation plan and control method of conventional air conditioners are no longer applicable to combined heat and cooling air conditioners with waste heat recovery.

[0004] Therefore, the prior art needs to be further developed. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide a control method, system and waste heat recovery air conditioner for a waste heat recovery refrigeration system to solve the technical problem in the related technology that the equipment room air conditioner with waste heat recovery cannot simultaneously meet the requirements of ensuring the environmental stability of the equipment room and improving the heating comfort of the workroom.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: a control method for a waste heat recovery refrigeration system is provided, the control method comprising:

[0007] According to the heating demand of the workshop, the workshop heat exchanger is connected with the equipment room heat exchanger in the equipment room, the workshop heat exchanger heats the workshop, and the workshop subsystem starts the heating mode;

[0008] Monitor the cooling effect of equipment rooms;

[0009] Adjust the heat exchange efficiency of the outdoor heat exchanger according to the cooling effect between the equipment.

[0010] Furthermore, the workshop heat exchanger is connected to the equipment room heat exchanger in the equipment room, and the workshop heat exchanger heats the workshop, and the workshop subsystem starts the heating mode, specifically:

[0011] The first flow path where the outdoor heat exchanger is located is cut off, and the outdoor heat exchanger stops working;

[0012] The second flow path where the workshop heat exchanger is located is made conductive so that the workshop heat exchanger is connected with the equipment room heat exchanger.

[0013] Further, the waste heat recovery refrigeration system includes a first switch arranged on the first flow path and a second switch arranged on the second flow path, the first switch being used to control the conduction of the first flow path;

[0014] The first flow path where the outdoor heat exchanger is located is cut off, specifically:

[0015] Controlling the first switch to close;

[0016] The second flow path where the workshop heat exchanger is located is connected, specifically:

[0017] Control the second switch to turn on.

[0018] Furthermore, the cooling effect of the equipment room is monitored, specifically:

[0019] Detect the current refrigerant temperature T in the heat exchanger between equipment 冷进_设备间 , obtain the refrigerant temperature change value △T in the heat exchanger between equipment within the preset time 冷进_设备间 ;

[0020] According to the cooling effect between the equipment, adjust the heat exchange efficiency of the outdoor heat exchanger, specifically:

[0021] △T 冷进_设备间 Compare with the change threshold T1;

[0022] If -T1≤△T 冷进_设备间 ≤T1, the cooling effect between the equipment is relatively stable, and the outdoor heat exchanger remains unchanged;

[0023] If △T 冷进_设备间 >T1℃, the cooling effect between the equipment is poor, and the heat exchange efficiency of the outdoor heat exchanger is improved.

[0024] Furthermore, the cooling effect of the equipment room is monitored, including:

[0025] When the heating mode is turned on and runs for the first preset time t1, according to the initial refrigerant temperature T in the heat exchanger between the devices when the heating mode is turned on, 冷进_设备间0 and the current refrigerant temperature T in the heat exchanger between the equipment 冷进_设备间 , obtain the refrigerant temperature change value △T within the first preset time 冷进_设备间0 ;

[0026] If △T 冷进_设备间 >T1℃, the cooling effect between the equipment is poor, and the heat exchange efficiency of the outdoor heat exchanger should be improved, specifically:

[0027] If △T 冷进_设备间0>T1°C, the first switch is opened according to the preset opening K0, so that the outdoor heat exchanger is connected to the inter-equipment heat exchanger, and the outdoor heat exchanger starts to exchange heat.

[0028] Furthermore, the cooling effect of the equipment room is monitored, specifically:

[0029] According to the refrigerant temperature change value △T in the heat exchanger between equipment within the preset time 冷进_设备间 , obtain the refrigerant temperature change rate △s within the preset time 冷媒 ;

[0030] According to the cooling effect between the equipment, adjust the heat exchange efficiency of the outdoor heat exchanger, including:

[0031] According to the refrigerant temperature change rate △s within the preset time 冷媒 , adjust the preset opening K0;

[0032] If the refrigerant temperature change rate △s 冷媒 Satisfy 0.1<△s 冷媒 ≤0.15, then K0 is 0.1;

[0033] If the refrigerant temperature change rate △s 冷媒 Satisfy 0.15<△s 冷媒 ≤0.3, then K0 is 0.2;

[0034] If the refrigerant temperature change rate △s 冷媒 Satisfy △s 冷媒 >0.3, then K0 takes the value of 0.3.

[0035] Furthermore, if △T 冷进_设备间0 >T1℃, the first switch is opened according to the preset opening K0, including:

[0036] When △s 冷媒 ≥a, if the heat exchange fan in the outdoor heat exchanger has not been turned on, the heat exchange fan is turned on according to the preset speed R0.

[0037] Furthermore, the cooling effect of the equipment room is monitored, including:

[0038] After the first preset time t1, the refrigerant temperature change value ΔT in the heat exchanger between the devices within the fourth preset time t4 is obtained every fourth preset time t4. 冷进_设备间 ;

[0039] If △T 冷进_设备间 >T1℃, the cooling effect between the equipment is poor, and the heat exchange efficiency of the outdoor heat exchanger needs to be improved, specifically:

[0040] If the current △T 冷进_设备间 △T relative to the previous moment 冷进_设备间If the first switch is still on, the opening of the first switch is increased according to the preset adjustment step k every fifth preset time t5 until △T 冷进_设备间 ≤T2℃, where T2℃<T1℃; and / or,

[0041] If △T 冷进_设备间 ≥T3℃, and the first switch is turned on, then the opening of the first switch is adjusted according to the preset adjustment step k every fifth preset time t5, and the speed of the heat exchange fan in the outdoor heat exchanger is adjusted according to the preset speed r every sixth preset time t6 until △T 冷进_设备间 <T3℃ or the speed of the heat exchange fan reaches the maximum, where T3℃>T1℃.

[0042] Further, increasing the opening of the first switch according to a preset adjustment step k includes:

[0043] If △T 冷进_设备间 Satisfy 0<△T 冷进_设备间 <0.5, then k is 2;

[0044] If △T 冷进_设备间 Satisfy 0.5≤△T 冷进_设备间 <1, then k is 5;

[0045] If △T 冷进_设备间 Satisfy 1≤△T 冷进_设备间 <2, then k is 7;

[0046] If △T 冷进_设备间 Satisfy △T 冷进_设备间 ≥2, then k is 10.

[0047] Further, adjusting the speed of the heat exchange fan according to the preset speed r includes:

[0048] If △T 冷进_设备间 Satisfy △T 冷进_设备间 <2, then r is 0;

[0049] If △T 冷进_设备间 Satisfy 2≤△T 冷进_设备间 If the interval is less than 3, the value of r is 20;

[0050] If △T 冷进_设备间 Satisfy 3≤△T 冷进_设备间 <4, then r is 30;

[0051] If △T 冷进_设备间 Satisfy 4≤△T 冷进_设备间 <5, then r is 40;

[0052] If △T 冷进_设备间 Satisfy △T 冷进_设备间 ≥5, then r is 50.

[0053] Furthermore, the control method further includes:

[0054] Monitor the heating effect in the workroom;

[0055] According to the heating effect of the workshop, the auxiliary heating device in the workshop subsystem is controlled to be turned on or off.

[0056] Furthermore, the heating effect of the workroom is monitored, specifically:

[0057] Detect the current indoor ambient temperature T of the workroom 内环_工作间 , according to the current indoor ambient temperature T of the workroom 内环_工作间 Get the time t required for the indoor ambient temperature of the workshop to rise from the current moment to the set temperature of the workshop s ;

[0058] According to the heating effect of the workshop, the auxiliary heating device in the workshop subsystem is controlled to be turned on or off, specifically:

[0059] If T 内环_工作间 <T 设定_工作间 , and t s ≥t2min, the auxiliary heating device in the workshop subsystem is controlled to start until t s <t2, turn off the auxiliary heating device.

[0060] Furthermore, the heating effect of the workroom is monitored, including:

[0061] When the heating mode is turned on and runs for the first preset time t1, the current indoor ambient temperature T of the workroom is detected. 内环_工作间0 , according to the current indoor ambient temperature T of the workroom 内环_工作间0 Obtain the time t required for the indoor ambient temperature of the workroom to rise from the first preset time t1 to the set temperature s0 ;

[0062] After the first preset time t1, the current indoor ambient temperature T of the workroom is detected at every third preset time t3. 内环_工作间 , obtain the third preset time t3 s .

[0063] A waste heat recovery refrigeration system, comprising:

[0064] Memory;

[0065] A processor coupled to the memory executes the control method of the waste heat recovery refrigeration system as described above.

[0066] A waste heat recovery air conditioner comprises a waste heat recovery refrigeration system, and the waste heat recovery refrigeration system is the above-mentioned waste heat recovery refrigeration system.

[0067] Beneficial effects:

[0068] 1. In the control method of this embodiment, as the heating load of the workshop changes, the heat exchange efficiency and cooling effect of the equipment room will be affected at the same time. While meeting the heating comfort of the workshop, by monitoring the cooling effect of the equipment room, the heat exchange efficiency of the outdoor heat exchanger is adjusted in time to keep the environment of the equipment room stable and ensure the cooling demand of the equipment room. It is achieved on the basis of waste heat recovery without affecting the normal cooling effect of the air conditioner in the equipment room, taking into account the comfort of the workshop, and saving energy and reducing consumption. A new heating comfort control scheme for combined heat and cold air conditioning is proposed, which is used to better utilize waste heat to meet the comfort needs of workshop personnel, and solves the technical problem that the air conditioner in the equipment room with waste heat recovery in the related technology cannot simultaneously meet the requirements of ensuring the stability of the equipment room environment and improving the heating comfort of the workshop.

[0069] 2. A heating comfort control scheme for a combined cooling and heating air conditioner with waste heat recovery is proposed. In response to changes in the heating load in the workshop, the refrigerant distribution strategy and the speed of the external fan are adjusted to ensure that the normal cooling effect of the air conditioner in the equipment room is not affected on the basis of waste heat recovery, while taking into account the comfort of the workshop and saving energy and reducing consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 is a flow chart of a control method of a waste heat recovery refrigeration system adopted in an embodiment of the present invention;

[0071] Figure 2 is a schematic structural diagram of a waste heat recovery refrigeration system used in an embodiment of the present invention;

[0072] Figure 3 It is a flow chart of a specific embodiment of the control method of the waste heat recovery refrigeration system adopted in the embodiment of the present invention.

[0073] The above drawings include the following reference numerals:

[0074] 1. Workshop subsystem; 11. Second flow path; 2. Outdoor heat exchanger; 21. First flow path; 22. Heat exchange fan; 3. Workshop heat exchanger; 4. Equipment room heat exchanger; 5. Three-way valve. DETAILED DESCRIPTION

[0075] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0076] Example 1

[0077] According to an embodiment of the present invention, a control method for a waste heat recovery refrigeration system is provided. Figures 1 to 3 , control methods include:

[0078] According to the heating demand of the workshop, the workshop heat exchanger 3 is connected with the equipment room heat exchanger 4 in the equipment room, the workshop heat exchanger 3 performs heating in the workshop, and the workshop subsystem 1 starts the heating mode;

[0079] Monitor the cooling effect of equipment rooms;

[0080] The heat exchange efficiency of the outdoor heat exchanger 2 is adjusted according to the cooling effect between the devices.

[0081] Specifically, see Figure 2 In the waste heat recovery refrigeration system, the second flow path 11 is connected in parallel with the first flow path 21 and the equipment room heat exchanger 4, the outdoor heat exchanger 2 is arranged on the first flow path 21, and the workshop heat exchanger 3 is arranged on the second flow path 11.

[0082] It should be noted that, in the normal working mode of the waste heat recovery refrigeration system, the flow of the first flow path 21 is fully open, the second flow path 11 remains closed, the equipment room heat exchanger 4 is connected with the outdoor heat exchanger 2, the equipment room heat exchanger 4 is an evaporator, and the outdoor heat exchanger 2 is a condenser. The equipment room heat exchanger 4 cools in the equipment room, and the outdoor heat exchanger 2 releases heat on the outdoor side. In the present invention, the workshop heat exchanger 3 is connected with the equipment room heat exchanger 4 in the equipment room, the workshop heat exchanger 3 is a condenser, and the workshop heat exchanger 3 releases heat in the workshop, so that a large amount of heat will be released to the outdoors for recycling when the equipment room air conditioner is refrigerated. This part of heat can be used to meet the heating comfort needs of the personnel in the workshop.

[0083] In the control method of this embodiment, as the heating load of the workshop changes, the heat exchange efficiency and cooling effect of the equipment room will be affected at the same time. While meeting the heating comfort of the workshop, by monitoring the cooling effect of the equipment room, the heat exchange efficiency of the outdoor heat exchanger 2 is adjusted in time to keep the environment of the equipment room stable and ensure the cooling demand of the equipment room. It is achieved on the basis of waste heat recovery without affecting the normal cooling effect of the air conditioner in the equipment room, while taking into account the comfort of the workshop and saving energy and reducing consumption. In this embodiment, a new heating and cooling combined air conditioning heating comfort control scheme is proposed to better utilize waste heat to meet the comfort needs of workshop personnel, solving the technical problem that the air conditioner in the equipment room with waste heat recovery in the related technology cannot simultaneously meet the requirements of ensuring the stability of the equipment room environment and improving the heating comfort of the workshop.

[0084] In the control method of the waste heat recovery refrigeration system of this embodiment, the workshop heat exchanger 3 is connected to the equipment room heat exchanger 4 in the equipment room, the workshop heat exchanger 3 performs heating in the workshop, and the workshop subsystem 1 starts the heating mode, specifically:

[0085] The first flow path 21 where the outdoor heat exchanger 2 is located is cut off, and the outdoor heat exchanger 2 stops working;

[0086] The second flow path 11 where the workshop heat exchanger 3 is located is conducted, so that the workshop heat exchanger 3 is connected with the equipment room heat exchanger 4 .

[0087] Specifically, by cutting off the first flow path 21, the outdoor heat exchanger 2 completely stops working, and the second flow path 11 is opened, so that a passage is formed between the workshop heat exchanger 3 and the equipment room heat exchanger 4, so that all the refrigerant in the equipment room heat exchanger 4 reaches the workshop heat exchanger 3 to release heat, thereby achieving rapid temperature rise in the workshop, thereby meeting the heating demand of the workshop.

[0088] It is understandable that, at the beginning of the heating mode, the entire refrigerant flow rate may also be distributed so that a portion enters the workroom heat exchanger 3 and the remaining portion enters the outdoor heat exchanger 2 or other heat exchanger distribution methods.

[0089] In the control method of the waste heat recovery refrigeration system of this embodiment, the waste heat recovery refrigeration system includes a first switch arranged on the first flow path 21 and a second switch arranged on the second flow path 11, and the first switch is used to control the conduction of the first flow path 21;

[0090] The first flow path 21 where the outdoor heat exchanger 2 is located is cut off, specifically:

[0091] Controlling the first switch to close;

[0092] The second flow path 11 where the workshop heat exchanger 3 is located is connected, specifically:

[0093] Control the second switch to turn on.

[0094] In some embodiments, the waste heat recovery refrigeration system includes a three-way valve 5 , and the first switch and the second switch are two control ends of the three-way valve 5 , respectively.

[0095] In some embodiments, when the heating mode starts, the three-way valve 5 is switched from a fully open state on the outdoor side and a fully closed state on the workshop side to a fully closed state on the outdoor side and a fully open state on the workshop side, the opening of the electronic expansion valve remains unchanged, and the outdoor heat exchange fan is turned off.

[0096] In the control method of the waste heat recovery refrigeration system of this embodiment, the refrigeration effect between the devices is monitored, specifically:

[0097] Detect the current refrigerant temperature T in the equipment heat exchanger 4冷进_设备间 , obtain the refrigerant temperature change value △T in the equipment heat exchanger 4 within the preset time 冷进_设备间 ;

[0098] According to the cooling effect between the equipment, the heat exchange efficiency of the outdoor heat exchanger 2 is adjusted, specifically:

[0099] △T 冷进_设备间 Compare with the change threshold T1;

[0100] If -T1≤△T 冷进_设备间 ≤T1, the cooling effect between the equipment is relatively stable, and the outdoor heat exchanger 2 remains stationary;

[0101] If △T 冷进_设备间 >T1℃, the cooling effect between the devices is poor, and the heat exchange efficiency of the outdoor heat exchanger 2 is improved.

[0102] In some embodiments, the recommended value of T1 is 0.5°C.

[0103] In some embodiments, the current refrigerant temperature T in the inter-equipment heat exchanger 4 冷进_设备间 , specifically refers to the temperature of the refrigerant at the refrigerant inlet of the equipment room heat exchanger 4 (i.e., evaporator). The refrigerant inlet of the equipment room heat exchanger 4 (i.e., evaporator) is directly connected to the workroom heat exchanger 3, which can most intuitively and quickly reflect the heat exchange of the refrigerant in the workroom, thereby directly and quickly reflecting the changes in the heating load of the workroom.

[0104] Specifically, by obtaining the refrigerant temperature change value ΔT in the inter-equipment heat exchanger 4 within a preset time 冷进_设备间 , which can reflect whether the equipment room can maintain a stable cooling effect: if -T1≤△T 冷进_设备间 ≤T1, indicating that the heat exchange capacity of the workroom is equivalent to the heat exchange capacity of the outdoor side at the previous time, and the waste heat generated by the refrigeration of the equipment room can be used to increase the temperature of the workroom. The refrigeration effect of the equipment room is relatively stable, and the outdoor heat exchanger 2 remains unchanged; if △T 冷进_设备间 >T1℃, the cooling effect between the devices is poor, and the heat exchange efficiency of the outdoor heat exchanger 2 is improved.

[0105] In the control method of the waste heat recovery refrigeration system of this embodiment, monitoring the refrigeration effect between devices includes:

[0106] When the heating mode is turned on and runs for the first preset time t1, the initial refrigerant temperature T in the inter-equipment heat exchanger 4 when the heating mode is turned on is 冷进_设备间0 and the current refrigerant temperature T in the inter-equipment heat exchanger 4 冷进_设备间 , obtain the refrigerant temperature change value △T within the first preset time 冷进_设备间0 ;

[0107] If △T冷进_设备间 >T1℃, the cooling effect between the equipment is poor, and the heat exchange efficiency of the outdoor heat exchanger 2 is improved, specifically:

[0108] If △T 冷进_设备间0 >T1°C, the first switch is opened according to the preset opening K0, so that the outdoor heat exchanger 2 is connected with the inter-equipment heat exchanger 4, and the outdoor heat exchanger 2 starts to exchange heat.

[0109] It should be noted that △T 冷进_设备间0 =T 冷进_设备间 -T 冷进_设备间0 .

[0110] Specifically, after the heating mode starts, it is first maintained for a certain period of time to ensure that the temperature in the workroom rises quickly and the heating comfort of the users in the workroom is guaranteed. When the temperature in the workroom gradually rises, the heat exchange capacity of the workroom deteriorates, which will inevitably lead to △T 冷进_设备间 Therefore, at the first preset time t1, the cooling condition of the equipment room is obtained to avoid excessive temperature changes in the equipment room and ensure stable operation of the air conditioner in the equipment room.

[0111] In some embodiments, t1 is 10 min.

[0112] It should be noted that if △T 冷进_设备间0 >T1℃, indicating that the heat exchange capacity of the workroom is weaker than that of the outdoor side, resulting in the refrigeration capacity being unable to maintain the constant temperature between the equipment. Therefore, the three-way valve opening needs to be adjusted to allow part of the refrigerant to return to the outdoor side for heat exchange. If the first switch is not turned on, the first switch is turned on according to the preset opening K0, so that the outdoor heat exchanger 2 is connected to the equipment room heat exchanger 4, and returns to the outdoor heat exchanger 2 for heat exchange, so that the refrigerant completely releases heat on the outdoor side, reducing △T 冷进_设备间0 , thereby ensuring the cooling effect between equipment.

[0113] It should be noted that if -T1≤△T 冷进_设备间0 ≤T1, the current operating status remains unchanged.

[0114] In the control method of the waste heat recovery refrigeration system of this embodiment, the refrigeration effect between the devices is monitored, specifically:

[0115] According to the refrigerant temperature change value △T in the equipment heat exchanger 4 within the preset time 冷进_设备间 , obtain the refrigerant temperature change rate △s within the preset time 冷媒 ;

[0116] According to the cooling effect between the equipment, the heat exchange efficiency of the outdoor heat exchanger 2 is adjusted, including:

[0117] According to the refrigerant temperature change rate △s within the preset time 冷媒 , adjust the preset opening K0;

[0118] If the refrigerant temperature change rate △s 冷媒 Satisfy 0.1<△s 冷媒 ≤0.15, then K0 is 0.1;

[0119] If the refrigerant temperature change rate △s 冷媒 Satisfy 0.15<△s 冷媒 ≤0.3, then K0 is 0.2;

[0120] If the refrigerant temperature change rate △s 冷媒 Satisfy △s 冷媒 >0.3, then K0 takes the value of 0.3.

[0121] It should be noted that K0 represents the ratio of the refrigerant flow rate flowing through the workshop heat exchanger 3 and the outdoor heat exchanger 2. When the outdoor side is fully open and the workshop side is fully closed, K0=1; when the outdoor side is fully closed and the workshop side is fully open, K0=0. An increase in K0 means an increase in the amount of refrigerant flowing through the outdoor side and a decrease in the amount of refrigerant flowing through the workshop side.

[0122] Specifically, the refrigerant temperature change value ΔT in the inter-equipment heat exchanger 4 within the preset time is obtained. 冷进_设备间 At the same time, calculate the refrigerant temperature change rate △s within the preset time 冷媒 , △s 冷媒 =(T 冷进_设备间 -T 冷进_设备间上一时刻 ) / t.

[0123] Specifically, see the following Table 1, which shows the 冷媒 Adjust the parameter adjustment table of K0, the refrigerant temperature change rate △s within the preset time 冷媒 Adjust the preset opening K0. Refrigerant temperature change rate △s 冷媒 The larger the value, the more unstable the cooling effect of the equipment room is, and you need to increase △s 冷媒 , the amount of refrigerant flowing through the outdoor side increases, and the amount of refrigerant flowing through the workshop side decreases, so as to improve the heat exchange efficiency of the outdoor heat exchanger 2.

[0124] <![CDATA[△s 冷媒 ]]> <![CDATA[0.1<△s 冷媒 ≤0.15]]> <![CDATA[0.15<△s 冷媒 ≤0.3]]> <![CDATA[△s 冷媒 >0.3]]> <![CDATA[K0]]> 0.1 0.2 0.3

[0125] Table 1

[0126] In the control method of the waste heat recovery refrigeration system of this embodiment, if ΔT 冷进_设备间0 >T1℃, the first switch is opened according to the preset opening K0, including:

[0127] When △s 冷媒 ≥a, if the heat exchange fan 22 in the outdoor heat exchanger 2 has not been turned on, the heat exchange fan 22 is turned on according to the preset speed R0.

[0128] In some embodiments, a recommended value is 0.3.

[0129] Specifically, when △s 冷媒 ≥a, the opening of the three-way valve is adjusted and the heat exchange fan 22 is turned on to further improve the heat exchange efficiency of the outdoor heat exchanger 2. The speed of the heat exchange fan 22 is set to R0, and R0 is preferably the lowest wind speed.

[0130] In the control method of the waste heat recovery refrigeration system of this embodiment, monitoring the refrigeration effect between devices includes:

[0131] After the first preset time t1, the refrigerant temperature change value ΔT in the inter-device heat exchanger 4 within the fourth preset time t4 is obtained every fourth preset time t4. 冷进_设备间 ;

[0132] If △T 冷进_设备间 >T1℃, the cooling effect between the equipment is poor, and the heat exchange efficiency of the outdoor heat exchanger 2 needs to be improved, specifically:

[0133] If the current △T 冷进_设备间 △T relative to the previous moment 冷进_设备间 If the first switch is still on, the opening of the first switch is increased according to the preset adjustment step k every fifth preset time t5 until △T 冷进_设备间 ≤T2℃, where T2℃<T1℃; and / or,

[0134] If △T 冷进_设备间 ≥T3℃, and the first switch is turned on, then the opening of the first switch is adjusted according to the preset adjustment step k every fifth preset time t5, and the speed of the heat exchange fan 22 in the outdoor heat exchanger 2 is adjusted according to the preset speed r every sixth preset time t6 until △T 冷进_设备间 <T3℃ or the rotation speed of the heat exchange fan 22 reaches the maximum, where T3℃>T1℃.

[0135] Specifically, the refrigerant temperature change value ΔT in the inter-device heat exchanger 4 within the fourth preset time t4 is obtained every fourth preset time t4. 冷进_设备间 , continuously test the cooling effect of the equipment room to ensure that the environment in the equipment room remains stable.

[0136] In some embodiments, t4 is preferably 6 min.

[0137] If △T 冷进_设备间 The temperature is still on the rise, and the heat exchange efficiency of the outdoor heat exchanger 2 needs to be further improved. The opening of the three-way valve needs to be further increased. Then, the opening of the first switch is increased at a rate of k steps per t5min until △T 冷进_设备间When ≤T2℃, stop adjusting the opening of the first switch, and the entire system maintains the current operating state until △T is detected. 冷进_设备间 Still showing an upward trend, the value of k is determined by △T 冷进_设备间 Decide.

[0138] In some embodiments, t5 is preferably 3 min, and T2 is preferably 0°C.

[0139] If △T 冷进_设备间 ≥T3℃, if the heat exchange efficiency of outdoor heat exchanger 2 needs to be further improved, the speed of heat exchange fan 22 is increased while changing the valve step, and the speed is adjusted at a rate of r revolutions per t6min until △T 冷进_设备间 <T3, or the speed of the heat exchange fan 22 reaches the maximum, the value of r is determined by △T 冷进_设备间 Decide.

[0140] In some embodiments, T3 is preferably 2° C., and T2 is preferably 1 min.

[0141] In the control method of the waste heat recovery refrigeration system of this embodiment, increasing the opening of the first switch according to a preset adjustment step k includes:

[0142] If △T 冷进_设备间 Satisfy 0<△T 冷进_设备间 <0.5, then k is 2;

[0143] If △T 冷进_设备间 Satisfy 0.5≤△T 冷进_设备间 <1, then k is 5;

[0144] If △T 冷进_设备间 Satisfy 1≤△T 冷进_设备间 <2, then k is 7;

[0145] If △T 冷进_设备间 Satisfy △T 冷进_设备间 ≥2, then k is 10.

[0146] Specifically, see the following Table 2, which shows the 冷进_设备间 Parameter adjustment table for adjusting K. △T 冷进_设备间 The larger the value, the greater the change in refrigerant temperature, which means that the refrigerant has not been completely heat released outdoors and in the workshop, and the flow rate of refrigerant entering the outdoors needs to be further increased.

[0147] The following example illustrates the adjustment process of the first switch opening. For example, the maximum opening of the three-way valve 5 is 500 steps, the current valve opening is 200 steps, △T 冷进_设备间 is 0.6. According to Table 2, the opening is increased by 5 steps every t5, that is, the opening is 205 steps at the 3rd minute and 210 steps at the 6th minute, and △T is updated once at the 6th minute.冷进_设备间 , if at this time △T 冷进_设备间 is 0.3, then the opening at the 9th minute is 212 steps.

[0148] <![CDATA[△T 冷进_设备间 ]]> (0，0.5) [0.5，1) [1，2) ≥2 k 2 5 7 10

[0149] Table 2

[0150] In the control method of the waste heat recovery refrigeration system of this embodiment, the speed of the heat exchange fan 22 is adjusted according to the preset speed r, including:

[0151] If △T 冷进_设备间 Satisfy △T 冷进_设备间 <2, then r is 0;

[0152] If △T 冷进_设备间 Satisfy 2≤△T 冷进_设备间 If the interval is less than 3, the value of r is 20;

[0153] If △T 冷进_设备间 Satisfy 3≤△T 冷进_设备间 <4, then r is 30;

[0154] If △T 冷进_设备间 Satisfy 4≤△T 冷进_设备间 <5, then r is 40;

[0155] If △T 冷进_设备间 Satisfy △T 冷进_设备间 ≥5, then r is 50.

[0156] Specifically, see the following Table 3, which shows the 冷进_设备间 Parameter adjustment table for adjusting r. △T 冷进_设备间 The larger the value, the greater the change in refrigerant temperature, which means that the refrigerant has not been completely heat released outdoors and in the workroom. While continuing to increase the flow of refrigerant entering the outdoors, increase the speed of the outdoor heat exchange fan 22, thereby further improving the heat exchange capacity of the outdoor heat exchanger 2.

[0157] <![CDATA[△T 冷进_设备间 ]]> ＜2 [2，3) [3，4) [4，5) ≥5 r 0 20 30 40 50

[0158] Table 3

[0159] It should be noted that, because the working room temperature is normally greater than the outdoor ambient temperature in winter, when the refrigerant does not flow through the outdoor side and flows entirely through the working room side, it is basically impossible to have T 冷进_设备间 Greatly reduced, that is, △T 冷进_设备间 <-T1℃ (T1 recommended value is 1℃).

[0160] In the control method of the waste heat recovery refrigeration system of this embodiment, the control method further includes:

[0161] Monitor the heating effect in the workroom;

[0162] According to the heating effect of the workshop, the auxiliary heating device in the workshop subsystem 1 is controlled to be turned on or off.

[0163] Specifically, it is also necessary to detect the temperature changes in the workplace to prevent affecting the heating comfort of the workplace. When the heating effect in the workplace is poor, the auxiliary heating function needs to be turned on to increase the indoor temperature rise rate and improve the comfort of indoor personnel.

[0164] In the control method of the waste heat recovery refrigeration system of this embodiment, the heating effect of the workroom is monitored, specifically:

[0165] Detect the current indoor ambient temperature T of the workroom 内环_工作间 , according to the current indoor ambient temperature T of the workroom 内环_工作间 Get the time t required for the indoor ambient temperature of the workshop to rise from the current moment to the set temperature of the workshop s ;

[0166] According to the heating effect of the workshop, the auxiliary heating device in the workshop subsystem 1 is controlled to be turned on or off, specifically:

[0167] If T 内环_工作间 <T 设定_工作间 , and t s ≥t2min, the auxiliary heating device in the workshop subsystem 1 is controlled to start until t s <t2, turn off the auxiliary heating device.

[0168] Specifically, according to the current indoor ambient temperature T 内环_工作间 Get the time t required for the indoor ambient temperature of the workshop to rise from the current moment to the set temperature of the workshop s ,include:

[0169] Detect the current indoor ambient temperature T of the workroom 内环_工作间 , and calculate the temperature rise rate △s in the workshop 工作间 , △s 工作间 =(T 内环_工作间 -T 内环_工作间上一时刻 ) / t, through △s 工作间 Calculate the time t required for the indoor ambient temperature of the workroom to rise from the current time to the set temperature s , t s =(T 设定_工作间 -T 内环_工作间 ) / △s 工作间 .

[0170] In the control method of the waste heat recovery refrigeration system of this embodiment, monitoring the heating effect of the workroom includes:

[0171] When the heating mode is turned on and runs for the first preset time t1, the current indoor ambient temperature T of the workroom is detected. 内环_工作间0 , according to the current indoor ambient temperature T of the workroom 内环_工作间0 Obtain the time t required for the indoor ambient temperature of the workroom to rise from the first preset time t1 to the set temperature s0 ;

[0172] After the first preset time t1, the current indoor ambient temperature T of the workroom is detected at every third preset time t3. 内环_工作间 , obtain the third preset time t3 s .

[0173] Specifically, T 设定_工作间 The preset working room temperature.

[0174] In some embodiments, t2 is preferably 30 min, and t3 is preferably 5 min.

[0175] T s It is large, indicating that according to the current air conditioning output heat, it takes a long time for the workroom temperature to reach the target temperature. Therefore, auxiliary heating needs to be turned on to increase the indoor temperature rise rate. s After t2, the temperature rise rate in the workplace is acceptable and the auxiliary heating can be turned off, which not only meets the comfort demand but also saves energy.

[0176] At the first preset time t1, not only the temperature change of the equipment room is detected, but also the temperature and temperature rise of the working room are monitored. 内环_工作间0 <T 设定_工作间 And t s0 ≥t2min, indicating that the heating capacity of the heat exchanger in the workroom at the first preset time t1 cannot meet the heating demand of the workroom, and the auxiliary heating function needs to be turned on to increase the indoor temperature rise rate and improve the comfort of indoor personnel.

[0177] After the first preset time t1, t is calculated once every t3min according to the above method. s , turn off the auxiliary heating function after calculating ts<t2.

[0178] It should be noted that in the control method, the inner ring temperature and temperature rise of the workshop are continuously paid attention to. 内环_工作间 <T 设定_工作间 And t s ≥t2min, the auxiliary heating function needs to be turned on.

[0179] Example 2

[0180] The waste heat recovery refrigeration system of this embodiment includes:

[0181] Memory;

[0182] A processor coupled to the memory executes the control method of the waste heat recovery refrigeration system as described above.

[0183] In the waste heat recovery refrigeration system of the present embodiment, as the heating load of the workshop changes, the heat exchange efficiency and cooling effect of the equipment room will be affected at the same time. While meeting the heating comfort of the workshop, by monitoring the cooling effect of the equipment room, the heat exchange efficiency of the outdoor heat exchanger 2 is adjusted in time to keep the environment of the equipment room stable and ensure the cooling demand of the equipment room. It is achieved on the basis of waste heat recovery without affecting the normal cooling effect of the air conditioner in the equipment room, while taking into account the comfort of the workshop and saving energy and reducing consumption. In the present embodiment, a new heating and cooling combined air conditioning heating comfort control scheme is proposed to better utilize waste heat to meet the comfort needs of workshop personnel, solving the technical problem that the air conditioner in the equipment room with waste heat recovery in the related technology cannot simultaneously meet the requirements of ensuring the stability of the equipment room environment and improving the heating comfort of the workshop.

[0184] Example 3

[0185] The waste heat recovery air conditioner of this embodiment includes a waste heat recovery refrigeration system, and the waste heat recovery refrigeration system is the waste heat recovery refrigeration system mentioned above.

[0186] In the waste heat recovery air conditioner of this embodiment, a new heating comfort control scheme for combined cold and hot air conditioning is proposed, which is used to better utilize waste heat to meet the comfort needs of personnel in the workplace, and solves the technical problem that the equipment room air conditioner with waste heat recovery in the related technology cannot simultaneously meet the requirements of ensuring the environmental stability of the equipment room and improving the heating comfort of the workplace.

[0187] Example 4

[0188] In any one of the embodiments 1-4 and Figure 3 On this basis, a feasible specific implementation method is further proposed.

[0189] Since special places such as equipment rooms have continuous and stable heat sources, they still need to be cooled in winter, while for workshops, heat needs to be provided in winter to meet the comfort needs of personnel activities. When the air conditioner in the equipment room is cooling, a large amount of heat will be released to the outside. In winter, this part of heat can be used to meet the comfort needs of personnel in the workshop. However, the main task of this air conditioner during operation is to meet the cooling needs of the equipment room. When the load in the equipment room remains constant, the compressor frequency and other factors are in a stable state, so the amount of heat that can be obtained in the workshop is also relatively constant. However, as a place for personnel activities, the demand for comfort in the workshop is in a changing state, so the temperature control scheme for conventional air conditioning heating is no longer applicable. Based on this, this embodiment proposes a new combined cold and hot air conditioning heating comfort control scheme to better utilize waste heat to meet the comfort needs of personnel in the workshop.

[0190] In the case of equipment rooms with continuous and stable loads, the comfort control strategy for the workplace is as follows:

[0191] 1. When the equipment room is in stable cooling mode, the workroom turns on the heating mode;

[0192] First, read the current inlet refrigerant temperature of the equipment room heat exchanger 4, recorded as T 冷进_设备间0 ;

[0193] Read the current inlet refrigerant temperature of outdoor heat exchanger 2, recorded as T 冷进_室外侧0 ;

[0194] Read the set temperature of the workroom, recorded as T 设定_工作间 ;

[0195] Read the current working room ambient temperature, recorded as T 内环_工作间0 .

[0196] 2. The three-way valve 5 is switched from the fully open state on the outdoor side and the fully closed state on the workshop side to the fully closed state on the outdoor side and the fully open state on the workshop side. The opening of the electronic expansion valve remains unchanged, and the outdoor heat exchange fan 22 is turned off.

[0197] 3. After the three-way valve 5 maintains the initial opening and runs for t1min (the recommended value of t1 is 10min);

[0198] Detect the current inlet refrigerant temperature T of the heat exchanger 4 between the equipment 冷进_设备间 , compare the change of the inlet refrigerant temperature of the heat exchanger 4 between the equipments △T 冷进_设备间0 (△T 冷进_设备间 =T 冷进_设备间 -T 冷进_设备间0 ), and calculate the temperature change rate of the refrigerant inlet of the equipment heat exchanger 4 △s 冷媒0 =(T 冷进_设备间 -T 冷进_设备间0 ) / t1.

[0199] Detect the current indoor ambient temperature T of the workroom 内环_工作间 , and calculate the temperature rise rate in the workshop, △s 工作间0 =(T 内环_工作间 -T 内环_工作间0 ) / t1, through △s 工作间0 Calculate the time t required for the indoor ambient temperature of the workroom to rise from the current time to the set temperature s0 , t s0 =(T 设定_工作间 -T 内环_工作间 ) / △s 工作间0 .

[0200] (1) If △T 冷进_设备间0Maintaining within the range of ±T1℃ (the recommended value of T1 is 0.5℃), it indicates that the heat exchange capacity of the workroom is equivalent to the previous outdoor heat exchange capacity, and the waste heat generated by the refrigeration of the equipment room can be used to increase the temperature of the workroom, so as to further determine the temperature change of the workroom.

[0201] If T 内环_工作间 <T 设定_工作间 And t s0 ≥t2min (the recommended value of t2 is 30min), the auxiliary heating function needs to be turned on to increase the indoor temperature rise rate and improve the comfort of indoor personnel.

[0202] And then calculate t3min (t3 recommended value is 5min) according to the above method once every t3min s , to be calculated t s The auxiliary heating function will be turned off after t2.

[0203] t s =(T 设定_工作间 -T 内环_工作间 ) / △s 工作间

[0204] △s 工作间 =(T 内环_工作间 -T t3时刻前内环_工作间 ) / t3

[0205] When the temperature of the workshop gradually rises, the heat exchange capacity of the workshop becomes worse, which will inevitably lead to △T 冷进_设备间 Therefore, △T needs to be continuously monitored during the process. 冷进_设备间 , when △T 冷进_设备间 >T1℃, execute the following plan.

[0206] (2) If △T 冷进_设备间 >T1℃, indicating that the heat exchange capacity of the workroom is weaker than that of the outdoor side, resulting in the refrigeration capacity being unable to maintain a constant temperature between the equipment. Therefore, the opening of the three-way valve 5 needs to be adjusted to allow part of the refrigerant to return to the outdoor side for heat exchange.

[0207] According to the change rate of the refrigerant temperature at the inlet of the outdoor heat exchanger 2 △s 冷媒0 Adjust the initial opening K0 of the three-way valve 5. The recommended value of K0 is shown in Table 1 (where K0 represents the ratio of the refrigerant flow through the workshop and the outdoor side. When the outdoor side is fully open and the workshop side is fully closed, K0=1; when the outdoor side is fully closed and the workshop side is fully open, K0=0. An increase in K0 means an increase in the amount of refrigerant flowing through the outdoor side and a decrease in the amount of refrigerant flowing through the workshop side).

[0208] And when △s 冷媒0 ≥a (the recommended value of a is 0.3), adjust the opening of the three-way valve 5 and start the outdoor heat exchange fan 22 at the same time, and set the speed of the outdoor heat exchange fan 22 to R0 (R0 is recommended to be the lowest wind speed).

[0209] Calculate △T every t4min (the recommended value of t4 is 6min) 冷进_设备间 .

[0210] If △T 冷进_设备间 If the trend is still upward, adjust the opening by increasing the opening k steps every t5min (t5 is recommended to be 3min) until △T 冷进_设备间 ≤T2℃ (T2 recommended value is 0℃), k recommended see Table 2.

[0211] If △T 冷进_设备间 ≥T3℃ (T3 recommended value is 2℃), then increase the speed of outdoor heat exchange fan 22 while changing the valve step, and adjust it at the rate of increasing r revolutions per t6 min (t6 recommended 1min) until △T 冷进_设备间 <T3, or the external fan speed reaches the maximum, the recommended value of r is shown in Table 3.

[0212] Where △T 冷进_设备间 =T 冷进_设备间 -T 冷进_设备间t4时刻前

[0213] During the above process, keep paying attention to the inner ring temperature and temperature rise in the workshop. 内环_工作间 <T 设定_工作间 And t s ≥t2min, the auxiliary heating function needs to be turned on.

[0214] (3) In winter, the working room temperature is usually greater than the outdoor ambient temperature. When the refrigerant does not flow through the outdoor side and flows entirely through the working room side, it is basically impossible to have T 冷进_设备间 Greatly reduced, that is, △T 冷进_设备间 <-T1℃ (T1 recommended value is 1℃).

[0215] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0216] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0217] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0218] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0219] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A control method for a waste heat recovery refrigeration system, characterized in that: The control method comprises: According to the heating demand of the workshop, the workshop heat exchanger (3) is connected to the equipment room heat exchanger (4) in the equipment room, the workshop heat exchanger (3) performs heating in the workshop, and the workshop subsystem (1) starts the heating mode; Monitoring the cooling effect of the equipment room; The heat exchange efficiency of the outdoor heat exchanger (2) is adjusted according to the cooling effect of the equipment room.

2. The control method of the waste heat recovery refrigeration system according to claim 1, characterized in that: The workshop heat exchanger (3) is connected to the equipment room heat exchanger (4) in the equipment room, the workshop heat exchanger (3) performs heating in the workshop, and the workshop subsystem (1) starts the heating mode, specifically: The first flow path (21) where the outdoor heat exchanger (2) is located is cut off, and the outdoor heat exchanger (2) stops working; The second flow path (11) where the workshop heat exchanger (3) is located is opened so that the workshop heat exchanger (3) is connected to the equipment room heat exchanger (4).

3. The control method of the waste heat recovery refrigeration system according to claim 2, characterized in that: The waste heat recovery refrigeration system comprises a first switch arranged on the first flow path (21) and a second switch arranged on the second flow path (11), wherein the first switch is used to control the conduction of the first flow path (21); The first flow path (21) where the outdoor heat exchanger (2) is located is cut off, specifically: Controlling the first switch to be closed; The second flow path (11) where the workshop heat exchanger (3) is located is opened, specifically: Control the second switch to turn on.

4. The control method of the waste heat recovery refrigeration system according to claim 3, characterized in that: The monitoring of the cooling effect of the equipment room is specifically as follows: Detecting the current refrigerant temperature T in the inter-equipment heat exchanger (4) 冷进_设备间 , obtain the refrigerant temperature change value △T in the inter-equipment heat exchanger (4) within a preset time 冷进_设备间 ; According to the cooling effect between the devices, the heat exchange efficiency of the outdoor heat exchanger (2) is adjusted, specifically: △T 冷进_设备间 Compare with the change threshold T1; If -T1≤△T 冷进_设备间 ≤T1, the refrigeration effect of the equipment room is relatively stable, and the outdoor heat exchanger (2) remains stationary; If △T 冷进_设备间 >T1°C, the refrigeration effect between the devices is poor, and the heat exchange efficiency of the outdoor heat exchanger (2) is improved.

5. The control method of the waste heat recovery refrigeration system according to claim 4, characterized in that: The monitoring of the refrigeration effect of the equipment room includes: When the heating mode is turned on and runs for the first preset time t1, the initial refrigerant temperature T in the inter-equipment heat exchanger (4) when the heating mode is turned on is 冷进_设备间0 and the current refrigerant temperature T in the inter-equipment heat exchanger (4) 冷进_设备间 , obtain the refrigerant temperature change value △T within the first preset time 冷进_设备间0 ; If △T 冷进_设备间 >T1°C, the refrigeration effect between the devices is poor, and the heat exchange efficiency of the outdoor heat exchanger (2) is improved, specifically: If △T 冷进_设备间0 >T1°C, the first switch is opened according to the preset opening degree K0, so that the outdoor heat exchanger (2) is connected to the inter-equipment heat exchanger (4), and the outdoor heat exchanger (2) starts to exchange heat.

6. The control method of the waste heat recovery refrigeration system according to claim 5, characterized in that: The monitoring of the cooling effect of the equipment room is specifically as follows: According to the refrigerant temperature change value ΔT in the inter-equipment heat exchanger (4) within a preset time 冷进_设备间 , obtain the refrigerant temperature change rate △s within the preset time 冷媒 ; The step of adjusting the heat exchange efficiency of the outdoor heat exchanger (2) according to the refrigeration effect between the devices comprises: According to the refrigerant temperature change rate △s within the preset time 冷媒 , adjust the preset opening K0; If the refrigerant temperature change rate △s 冷媒 Satisfy 0.1<△s 冷媒 ≤0.15, then the value of K0 is 0.1; If the refrigerant temperature change rate △s 冷媒 Satisfy 0.15<△s 冷媒 ≤0.3, then the value of K0 is 0.2; If the refrigerant temperature change rate △s 冷媒 Satisfy △s 冷媒 >0.3, then the value of K0 is 0.

3.

7. The control method of the waste heat recovery refrigeration system according to claim 6, characterized in that: If △T 冷进_设备间0 >T1°C, the first switch is opened according to the preset opening degree K0, including: When △s 冷媒 ≥a, if the heat exchange fan (22) in the outdoor heat exchanger (2) has not yet been turned on, the heat exchange fan (22) is turned on at a preset speed R0.

8. The control method of the waste heat recovery refrigeration system according to claim 4, characterized in that: The monitoring of the refrigeration effect of the equipment room includes: After the first preset time t1, the refrigerant temperature change value ΔT in the inter-device heat exchanger (4) within the fourth preset time t4 is obtained every fourth preset time t4 冷进_设备间 ; If △T 冷进_设备间 >T1°C, the cooling effect between the devices is poor, and the heat exchange efficiency of the outdoor heat exchanger (2) needs to be improved, specifically: If the current △T 冷进_设备间 △T relative to the previous moment 冷进_设备间 If the first switch is still on, the opening of the first switch is increased according to the preset adjustment step k every fifth preset time t5 until the ΔT 冷进_设备间 ≤T2℃, where T2℃<T1℃; and / or, If △T 冷进_设备间 ≥T3°C, and the first switch is turned on, then the opening of the first switch is adjusted according to a preset adjustment step k every fifth preset time t5, and the speed of the heat exchange fan (22) in the outdoor heat exchanger (2) is adjusted according to a preset speed step r every sixth preset time t6, until △T 冷进_设备间 <T3℃ or the rotation speed of the heat exchange fan (22) reaches the maximum, wherein T3℃>T1℃.

9. The control method of the waste heat recovery refrigeration system according to claim 8, characterized in that: The step of increasing the opening of the first switch according to a preset adjustment step k includes: If △T 冷进_设备间 Satisfy 0<△T 冷进_设备间 <0.5, then the value of k is 2; If △T 冷进_设备间 Satisfy 0.5≤△T 冷进_设备间 <1, then the value of k is 5; If △T 冷进_设备间 Satisfy 1≤△T 冷进_设备间 <2, then the value of k is 7; If △T 冷进_设备间 Satisfy △T 冷进_设备间 ≥2, the value of k is 10.

10. The control method of the waste heat recovery refrigeration system according to claim 8, characterized in that: The adjusting the rotation speed of the heat exchange fan (22) according to the preset rotation amplitude r comprises: If △T 冷进_设备间 Satisfy △T 冷进_设备间 <2, then the value of r is 0; If △T 冷进_设备间 Satisfy 2≤△T 冷进_设备间 If the interval is less than 3, the value of r is 20; If △T 冷进_设备间 Satisfy 3≤△T 冷进_设备间 <4, then the value of r is 30; If △T 冷进_设备间 Satisfy 4≤△T 冷进_设备间 <5, then the value of r is 40; If △T 冷进_设备间 Satisfy △T 冷进_设备间 ≥5, then the value of r is 50.

11. The control method of the waste heat recovery refrigeration system according to claim 1, characterized in that: The control method further comprises: Monitor the heating effect in the workroom; According to the heating effect of the workshop, the auxiliary heating device in the workshop subsystem (1) is controlled to be turned on or off.

12. The control method of the waste heat recovery refrigeration system according to claim 11, characterized in that: The monitoring of the heating effect of the workroom is specifically as follows: Detect the current indoor ambient temperature T of the workroom 内环_工作间 , according to the current indoor ambient temperature T of the workroom 内环_工作间 Get the time t required for the indoor ambient temperature of the workshop to rise from the current moment to the set temperature of the workshop s ; According to the heating effect of the workshop, the auxiliary heating device in the workshop subsystem (1) is controlled to be turned on or off, specifically: If T 内环_工作间 <T 设定_工作间 , and t s ≥t2min, the auxiliary heating device in the workshop subsystem (1) is controlled to start until t s <t2, the auxiliary heating device is turned off.

13. The control method of the waste heat recovery refrigeration system according to claim 12, characterized in that: The monitoring of the heating effect of the workroom includes: When the heating mode is turned on and runs for the first preset time t1, the current indoor ambient temperature T of the workroom is detected. 内环_工作间0 , according to the current indoor ambient temperature T of the workroom 内环_工作间0 Obtain the time t required for the indoor ambient temperature of the workroom to rise from the first preset time t1 to the set temperature s0 ; After the first preset time t1, the current indoor ambient temperature T of the workroom is detected at every third preset time t3. 内环_工作间 , obtain the third preset time t3 s .

14. A waste heat recovery refrigeration system, characterized in that: include: Memory; A processor coupled to the memory, wherein the processor executes the control method of the waste heat recovery refrigeration system according to any one of claims 1 to 13.

15. A waste heat recovery air conditioner, characterized in that: It comprises a waste heat recovery refrigeration system, and the waste heat recovery refrigeration system is the waste heat recovery refrigeration system described in claim 14.

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