Cold heat four-in-one supply system and control method thereof

Abstract

The application discloses a cold-heat four-in-one supply system and a control method thereof, and belongs to the technical field of refrigeration and heating devices. The cold-heat four-in-one supply system is designed to solve the problem of time mismatch of cold and heat demands. The cold-heat four-in-one supply system comprises a first unit for cold and heat supply, a second unit for high-temperature hot water supply, and a third unit for high-temperature steam supply. The first unit comprises a cold-heat integrated machine, the second unit comprises a high-temperature heat pump, and the third unit comprises a flash tank and a steam compressor. The cold-heat four-in-one supply system and the control method thereof can realize the simultaneous preparation of cold water, heat supply, hot water and high-temperature steam, solve the problem of time mismatch of cold and heat demands, and are more convenient to use. The running state of the unit and the heat storage and cold storage condition can be determined according to the actual demand of the user for the amount of cold and heat, so as to reduce the running energy consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration and heating devices, and particularly relates to a cold-heat four-in-one supply system and a control method thereof. BACKGROUND

[0002] When a heat pump is used, both cold and heat may be used in the same system. Different systems are used to meet the situation where cold and heat coexist, and the initial investment of the system is large. Heat exchangers are added to both sides of the heat pump evaporator and condenser, so that the extracted heat and cold can be used at the same time. Based on this, a multi-in-one supply system is developed, in which the hot water on the side of the condenser of the first heat pump is used as the temperature-raising temperature of the condenser of the next heat pump, and the cold produced on the side of the evaporator of the first heat pump is used as the cooling supply. However, due to the limitations of refrigerants and heat pump systems, it is difficult to realize large temperature rise, and the multi-in-one supply system cannot simultaneously refrigerate and produce steam.

[0003] In some existing heat pump systems, an air source heat pump and a double-condenser water source heat pump are combined, and a buffer water tank is used to realize the stability of the heat pump working condition, so that the system can provide full-load refrigeration capacity while producing domestic hot water. Or, a refrigeration heat pump composite system water-cooled condenser side is connected with a hot water tank, and a drying circulation system and a heating circulation system to realize the needs of refrigeration, high-temperature drying and heating. Or, the waste heat of a multi-in-one system is used to produce domestic hot water.

[0004] The defects of the above-mentioned existing heat pump systems include: the problem of mismatching of cold and heat demand time cannot be solved; and the temperature range of the heat pump supply system is limited, and the maximum temperature produced is about 90 DEG C, which cannot meet the needs of high-temperature steam and high-temperature hot water production and use. SUMMARY

[0005] The present application aims to provide a cold-heat four-in-one supply system and a control method thereof, which solves the problem of mismatching of cold and heat demand time and is more convenient to use.

[0006] To achieve this purpose, on the one hand, the present application adopts the following technical scheme:

[0007] The cold-heat four-in-one supply system comprises: a first unit for cooling and heating, the first unit comprising a cold-heat all-in-one machine; a second unit for supplying high-temperature hot water, the second unit comprising a high-temperature heat pump; and a third unit for supplying high-temperature steam, the third unit comprising a flash tank and a steam compressor.

[0008] In one preferred embodiment, the first unit further comprises a cold water storage tank for providing cold water for cold users, the cold water storage tank being connected to the cold and heat all-in-one machine through a cold water pipeline; and a hot water storage tank for providing hot water for hot users and the second unit, the hot water outlet of the cold and heat all-in-one machine being connected to two hot water pipelines, one of which is connected to the hot water storage tank and the other of which is connected to the second unit; the hot water outlet of the hot water storage tank being connected to two hot water pipelines, one of which is connected to the second unit and the other of which is connected to the cold and heat all-in-one machine through a buffer tank.

[0009] In one preferred embodiment, the second unit further comprises a high-temperature hot water storage tank for providing high-temperature hot water for high-temperature hot users, the high-temperature heat pump comprising two groups of water inlet and outlet combination ends, one group of second unit heat source water inlet and outlet pipelines being connected to the first unit through a hot water pipeline; the other group of high-temperature hot water inlet and outlet pipelines being connected to two hot water pipelines, one of which is connected to the third unit and the other of which is connected to the high-temperature hot water storage tank.

[0010] In one preferred embodiment, the third unit further comprises a steam storage device for providing high-temperature steam for steam hot users, the water inlet end of the flash tank being connected to the second unit through a water pipeline, the hot water inlet and outlet pipelines of the flash tank being connected to the second unit, and the flashed steam being connected to the steam compressor through a steam pipeline; the steam outlet of the steam compressor being connected to two steam outlet pipelines, one of which is connected to the steam storage device and the other of which is connected to the steam hot users.

[0011] In one preferred embodiment, the flash tank comprises a first flash tank and a second flash tank which are independent of each other, the second unit further comprising a high-temperature hot water storage tank for providing high-temperature hot water for high-temperature hot users, the hot water outlet of the first flash tank being connected to the high-temperature heat pump through a pipeline, and the hot water inlet being connected to the high-temperature heat pump through a water pump and a pipeline; the hot water outlet of the second flash tank being connected to the high-temperature hot water storage tank through a pipeline, and the hot water inlet being connected to the high-temperature hot water storage tank through a water pump and a pipeline.

[0012] In another aspect, the present application adopts the following technical solutions:

[0013] The control method of the cold and heat four-in-one supply system realizes the simultaneous preparation of cold water, heating, hot water and high-temperature steam through the linkage of the cold and heat all-in-one machine, the high-temperature heat pump, the flash tank and the steam compressor.

[0014] In one preferred embodiment, when cold water is needed, when the water temperature in the cold water storage tank is greater than or equal to the upper limit preset value, the cold-heat all-in-one machine is started, the hot water in the cold-heat all-in-one machine is pumped into the cold water storage tank, and the cold water in the cold-heat all-in-one machine is sent into the cold water storage tank; when the water temperature in the cold water storage tank is less than or equal to the lower limit preset value, the cold-heat all-in-one machine is turned off; when the water temperature in the cold water storage tank meets the demand temperature, cold water is provided to the cold user.

[0015] In one preferred embodiment, when hot water of 30-80 DEG C is needed, when the water temperature in the hot water storage tank is less than or equal to the lower limit preset value, the cold-heat all-in-one machine is started, the cold water in the hot water storage tank is pumped into the cold-heat all-in-one machine, the cold water generated on the evaporator side of the cold-heat all-in-one machine is stored in the cold water storage tank, and the hot water in the cold-heat all-in-one machine is sent into the hot water storage tank; when the water temperature in the hot water storage tank is greater than or equal to the upper limit preset value, the cold-heat all-in-one machine is turned off; when the water temperature in the hot water storage tank meets the demand temperature, hot water is provided to the hot user.

[0016] In one preferred embodiment, when high-temperature hot water of 80-150 DEG C is needed, when the water temperature in the high-temperature hot water storage tank is less than or equal to the lower limit preset value, the high-temperature heat pump is turned off, the hot water outlet of the high-temperature hot water storage tank connected to the buffer tank is turned off, and the hot water in the high-temperature hot water storage tank enters the high-temperature heat pump; if the water temperature in the high-temperature hot water storage tank is greater than or equal to the operating temperature of the evaporator side of the high-temperature heat pump, the high-temperature heat pump is turned off; if the water temperature in the high-temperature hot water storage tank is less than or equal to the operating temperature of the evaporator side of the high-temperature heat pump, the cold-heat all-in-one machine is started, and the cold-heat all-in-one machine sends hot water to the high-temperature heat pump; when the water temperature in the high-temperature hot water storage tank is greater than or equal to the upper limit preset value, the high-temperature heat pump is turned off; when the water temperature in the high-temperature hot water storage tank meets the demand temperature, high-temperature hot water is provided to the high-temperature hot user.

[0017] In one preferred embodiment, when high-temperature steam is needed, when the temperature in the steam storage device is less than or equal to the lower limit preset value, if the high-temperature hot water storage tank meets the flash evaporation requirement, the steam outlet of the second flash tank is connected to the steam compressor through a steam pipeline, the steam outlet of the steam compressor is connected to the steam hot user, and the steam compressor is started; if the high-temperature hot water storage tank does not meet the flash evaporation temperature requirement, the high-temperature heat pump is started, the steam outlet of the first flash tank is connected to the steam compressor through a steam pipeline, and the steam outlet of the steam compressor is connected to the steam hot user.

[0018] The cold-heat four-in-one system disclosed by the application comprises a first unit for providing cold and heat, a second unit for providing high-temperature hot water, and a third unit for providing high-temperature steam, realizes the simultaneous preparation of cold water, heating, hot water and high-temperature steam, and can determine the operation state of the unit and the heat storage and cold storage according to the actual demand cold and heat of the user, so as to reduce the operation energy consumption.

[0019] The control method of the cold-heat four-in-one supply system disclosed in the present application realizes the simultaneous preparation of cold water, heating, hot water and high-temperature steam by the linkage of the cold-heat integrated machine, the high-temperature heat pump, the flash tank and the vapor compressor, solves the problem of time mismatch of cold-heat demand, and is more convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the cold-heat four-in-one supply system provided by the embodiment of the present application.

[0021] In the figure:

[0022] 1, first unit; 2, second unit; 3, third unit;

[0023] 101, cold-heat integrated machine; 102, cold storage water tank; 103, cold user; 104, heat storage water tank; 105, heat user; 106, buffer water tank; 107, first water pump; 108, second water pump; 109, third water pump; 110, fourth water pump; 111, fifth water pump; 112, first regulating water valve; 113, second regulating water valve; 114, third regulating water valve; 115, first temperature sensor; 116, second temperature sensor;

[0024] 201, high-temperature heat pump; 202, high-temperature heat storage water tank; 203, high-temperature heat user; 204, sixth water pump; 205, seventh water pump; 206, eighth water pump; 207, fourth regulating water valve; 208, fifth regulating water valve; 209, sixth regulating water valve; 210, third temperature sensor;

[0025] 301, first flash tank; 302, second flash tank; 303, vapor compressor; 304, vapor storage device; 305, vapor heat user; 306, buffer water tank; 307, seventh regulating water valve; 308, eighth regulating water valve; 309, ninth regulating water valve; 310, tenth regulating water valve; 311, eleventh regulating water valve; 312, fourth temperature sensor. DETAILED DESCRIPTION

[0026] To make the above-mentioned objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application are described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] In the description of the application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0028] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0029] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0031] It is to be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0032] The present embodiment discloses a cold-heat four-in-one supply system and a control method thereof, as shown in the figure, the cold-heat four-in-one supply system comprises a first unit 1 for cold and heat supply, a second unit 2 for high-temperature hot water supply, and a third unit 3 for high-temperature steam supply, wherein the first unit 1 comprises a cold-heat all-in-one machine 101, the second unit 2 comprises a high-temperature heat pump 201, and the third unit 3 comprises a flash tank and a steam compressor 303. Figure 1

[0033] The control method of the cold-heat four-in-one supply system is to realize the simultaneous preparation of cold water, heating, hot water, and high-temperature steam through the linkage of the cold-heat all-in-one machine 101, the high-temperature heat pump 201, the flash tank, and the steam compressor 303, thereby solving the problem of time mismatch of cold and heat demand and making the use more convenient; the flash tank and the steam compressor 303 cooperate to generate high-temperature steam, meeting the various demands of users and providing a good user experience; the first unit 1, the second unit 2, and the third unit 3 have their own temperature supply intervals, thereby expanding the temperature interval of heat preparation and making the system applicable to a wide range.

[0034] During the operation of the cold-heat four-in-one supply system, the operating state of the unit and the heat storage and cold storage conditions can be determined according to the actual demand of the user for cold and heat, so as to reduce the operating energy consumption. The preparation cost can be reduced at different demands. When the local heat network is not stable, the heat storage water tank 104, the high-temperature heat storage water tank 202, and the steam storage device 304 can play a peak shaving role.

[0035] The specific structure of the first unit 1, the second unit 2, and the third unit 3 is not limited, as long as it can realize the simultaneous preparation of cold water, heating, hot water, and high-temperature steam. In the present embodiment, the first unit 1 further comprises a cold storage water tank 102 for providing cold water for cold users 103 and a heat storage water tank 104 for providing hot water for hot users 105 and the second unit 2, a first temperature sensor 115 is arranged on the cold storage water tank 102, and a second temperature sensor 116 is arranged on the heat storage water tank 104. The cold storage water tank 102 is connected to the cold-heat all-in-one machine 101 through a cold water pipeline, and a first water pump 107 is arranged on the cold water pipeline connected to the cold water outlet of the cold storage water tank 102. The heat storage water tank 104 is connected to the hot users 105 through a hot water pipeline, and a fourth water pump 110 is arranged on the hot water pipeline connected between the hot water outlet of the heat storage water tank 104 and the inlet end of the hot users 105.​

[0036] In addition to the cold water pipe connected to the cold water storage tank 102, the hot water outlet of the cold-hot integrated machine 101 is connected to two hot water pipes, one of which is connected to the hot water storage tank 104 through the first regulating water valve 112, and the other of which is connected to the second unit 2 through the second regulating water valve 113; in addition to the water pipe connected to the hot user 105, the hot water outlet end of the hot water storage tank 104 is connected to two hot water pipes, one of which is connected to the second unit 2, and the other of which is connected to the cold-hot integrated machine 101 through the third regulating water valve 114, the buffer water tank 106 and the third water pump 109.

[0037] The second unit 2 further comprises a high-temperature hot water storage tank 202 for supplying high-temperature hot water to the high-temperature hot user 203, and the high-temperature hot water storage tank 202 is provided with a third temperature sensor 210. The high-temperature hot user 203 and the high-temperature hot water storage tank 202 are connected by a hot water pipe, and the sixth water pump 204 is arranged on the hot water pipe connected to the hot water outlet of the high-temperature hot water storage tank 202.

[0038] The high-temperature heat pump 201 comprises two groups of water inlet and outlet combination ends, one group of which is connected to the first unit 1 through a hot water pipe. Specifically, the hot water inlet of the high-temperature heat pump 201 is connected to the cold-hot integrated machine 101 and the hot water storage tank 104 through a hot water pipe respectively, and the hot water outlet of the high-temperature heat pump 201 is connected to the buffer water tank 106.

[0039] The other group of high-temperature hot water inlet and outlet pipes of the high-temperature heat pump 201 is connected to two hot water pipes, one of which is connected to the third unit 3 through the fifth regulating water valve 208, and the other of which is connected to the high-temperature hot water storage tank 202 through the fourth regulating water valve 207.

[0040] The third unit 3 further comprises a steam storage device 304 for supplying high-temperature steam to the steam hot user 305, and the steam storage device 304 is provided with a fourth temperature sensor 312, and the outlet end of the steam storage device 304 is connected to the steam hot user 305 through the eleventh regulating water valve 311.

[0041] The water inlet end of the flash tank is connected to the second unit 2 through a water pipe, the hot water inlet and outlet pipes of the flash tank are connected to the second unit 2, and the flashed steam is connected to the steam compressor 303 through a steam pipe; the steam outlet of the steam compressor 303 is connected to two steam outlet pipes, one of which is connected to the steam storage device 304 through the ninth regulating water valve 309, and the other of which is connected to the steam hot user 305 through the tenth regulating water valve 310.

[0042] The specific number of the flash tank is not limited, and there can be only one to reduce the cost. In this embodiment, the flash tank includes a first flash tank 301 and a second flash tank 302 which are independent of each other. The hot water outlet of the first flash tank 301 is connected to the high-temperature heat pump 201 through a pipeline, and the hot water inlet is connected to the high-temperature heat pump 201 through a water pump and a pipeline; the hot water outlet of the second flash tank 302 is connected to the high-temperature heat storage water tank 202 through a pipeline, and the hot water inlet is connected to the high-temperature heat storage water tank 202 through a water pump and a pipeline.

[0043] The cold storage water tank 102, the heat storage water tank 104, the high-temperature heat storage water tank 202, and the steam storage device 304 are respectively energy storage forms of cold storage and heat storage, and can meet the needs of energy saving and peak regulation.

[0044] The specific structure of the cold and heat all-in-one machine 101, the high-temperature heat pump 201, the flash tank, the steam compressor 303, and the temperature sensor is not limited, and the corresponding functions can be realized. The three units cooperate with each other, and the start and stop of the cold and heat all-in-one machine 101 and the high-temperature heat pump 201 are controlled through the required cold quantity, heat quantity, and steam demand, so that the system can be operated with minimum energy consumption.

[0045] The specific structure of the first regulating water valve 112, the second regulating water valve 113, the third regulating water valve 114, the fourth regulating water valve 207, the fifth regulating water valve 208, the sixth regulating water valve 209, the seventh regulating water valve 307, the eighth regulating water valve 308, the ninth regulating water valve 309, and the tenth regulating water valve 310 is not limited, and the flow and on-off of the pipeline can be adjusted. In this embodiment, the valve body can be but is not limited to a solenoid valve and a three-way solenoid valve.

[0046] On the basis of the above structure, the cold and heat four-in-one system further includes a control device. In this embodiment, the control device can be a centralized or distributed controller. For example, the controller can be a single microcontroller, or can be composed of multiple microcontrollers distributedly. The microcontroller can run a control program to control the cold and heat all-in-one machine 101, the high-temperature heat pump 201, the flash tank, and the steam compressor 303 to realize their functions.

[0047] The control method of the cold and heat four-in-one system is specifically as follows:

[0048] When cooling is needed, the system runs in cooling mode, and the water temperature in the cold storage water tank 102 is maintained within the required temperature range of the cold user 103. The temperature sensor 115 arranged on the cold storage water tank 102 sends the detected temperature value to the control device, and the control device starts or stops the cold and hot all-in-one machine 101 according to the temperature value. Specifically, when the water temperature in the cold storage water tank 102 is ≥ the upper limit preset value, the second water pump 108 and the cold and hot all-in-one machine 101 are started, the hot water in the cold storage water tank 102 is pumped into the cold and hot all-in-one machine 101, and the cold water in the cold and hot all-in-one machine 101 is sent into the cold storage water tank 102; when the water temperature in the cold storage water tank 102 is ≤ the lower limit preset value, the cold and hot all-in-one machine 101 and the second water pump 108 are stopped; when the water temperature in the cold storage water tank 102 meets the required temperature, the first water pump 107 is started to provide cold water to the cold user 103.

[0049] At the same time, the heat of the heating side of the cold and hot all-in-one machine 101 can be stored in the heat storage water tank 104 or directly provide waste heat source for the high-temperature heat pump 201.

[0050] When hot water with a temperature of 30-80°C is needed, the system runs in medium-temperature water mode, and the water temperature in the heat storage water tank 104 is maintained within the required temperature range of the hot user 105. The second temperature sensor 116 arranged on the heat storage water tank 104 sends the detected temperature value to the control device, and the control device starts or stops the cold and hot all-in-one machine 101 according to the temperature value. Specifically, when the water temperature in the heat storage water tank 104 is ≤ the lower limit preset value, the first adjusting water valve 112 is opened, the third adjusting water valve 114 is opened, the second adjusting water valve 113 is closed, the third water pump 109 is opened, the fifth water pump 111 is opened, the second water pump 108 is opened, the cold and hot all-in-one machine 101 is started, the cold water generated on the evaporator side of the cold and hot all-in-one machine 101 is stored in the cold storage water tank 102, the cold water in the heat storage water tank 104 is pumped into the cold and hot all-in-one machine 101, the cold water generated on the evaporator side of the cold and hot all-in-one machine 101 is stored in the cold storage water tank 102, and the hot water in the cold and hot all-in-one machine 101 is sent into the heat storage water tank 104; when the water temperature in the heat storage water tank 104 is ≥ the upper limit preset value, the cold and hot all-in-one machine 101 is stopped, the third water pump 109 is stopped, and the first adjusting water valve 112 is closed; when the water temperature in the heat storage water tank 104 meets the required temperature, the fourth water pump 110 is started to provide hot water to the hot user 105.

[0051] If the cooling mode and the medium-temperature water mode are run at the same time, and the cold and hot all-in-one machine 101 needs to be in working state in any mode, the cold and hot all-in-one machine 101 is started.

[0052] When high-temperature hot water (the temperature of high-temperature hot water can be more than 100℃ under high pressure) of 80℃-150℃ is needed, the system runs in the high-temperature water mode, and the water temperature in the high-temperature heat storage water tank 202 is maintained in the temperature range required by the high-temperature heat user 203. The third temperature sensor 210 arranged on the high-temperature heat storage water tank 202 sends the detected temperature value to the control device, and the control device controls the start or stop of the high-temperature heat pump 201 according to the temperature value. Specifically, when the water temperature in the high-temperature heat storage water tank 202 is ≤ the lower limit preset value, the sixth regulating water valve 209 is opened, the fourth regulating water valve 207 is opened, the fifth regulating water valve 208 is closed, the eighth water pump 206 is started, and the hot water pipeline connected to the third unit 3 of the high-temperature heat pump 201 is turned off; if the water temperature in the heat storage water tank 104 is ≥ the operating temperature of the evaporation side of the high-temperature heat pump 201, the third regulating water valve 114 is closed, the second regulating water valve 113 is closed, the first regulating water valve 112 is opened, the fifth water pump 111 is started, the third water pump 109 is started, the hot water outlet of the heat storage water tank 104 connected to the buffer water tank 106 is turned off, and the hot water in the heat storage water tank 104 enters the high-temperature heat pump 201; if the water temperature in the heat storage water tank 104 is ≤ the operating temperature of the evaporation side of the high-temperature heat pump 201, the third regulating water valve 114 is closed, the second regulating water valve 113 is opened, the first regulating water valve 112 is closed, the fifth water pump 111 is closed, the third water pump 109 is started, the cold and hot all-in-one machine 101 is started, and the cold and hot all-in-one machine 101 sends hot water to the high-temperature heat pump 201; when the water temperature in the heat storage water tank 202 is ≥ the upper limit preset value, the high-temperature heat pump 201 is stopped, and the eighth water pump 206 is stopped; when the water temperature in the heat storage water tank 202 meets the demand temperature of the high-temperature heat user 203, the sixth water pump 204 is started, and high-temperature hot water is provided to the high-temperature heat user 203.

[0053] When the first unit 1 and the second unit 2 run at the same time, the heat storage water tank 104 needs to meet the demand of the heat user 105 and needs to meet the start demand of the high-temperature heat pump 201, the first regulating water valve 112 is opened, the third regulating water valve 114 is closed, the second regulating water valve 113 is closed, the third water pump 109 is started, the fifth water pump 111 is started, the fourth water pump 110 is started, and the cold and hot all-in-one machine 101 is started.

[0054] When high-temperature steam is needed, the system runs in steam mode, and the temperature in the steam storage device 304 is maintained within the temperature range required by the steam heat user 305. The fourth temperature sensor 312 arranged on the steam storage device 304 sends the temperature value in the steam storage device 304 to the control device, and the control device starts or stops the steam compressor 303 according to the temperature value. Specifically, when the temperature in the steam storage device 304 is ≤ the lower limit preset value, if the high-temperature heat storage water tank 202 meets the flash evaporation requirement, the eighth regulating water valve 308 is opened, the seventh water pump 205 is opened, the eleventh regulating water valve 311 is closed, the seventh regulating water valve 307 is closed, the ninth regulating water valve 309 is closed, the tenth regulating water valve 310 is opened, the steam compressor 303 is started, the steam outlet of the second flash evaporation tank 302 is connected to the steam compressor 303 through a steam pipeline, the steam outlet of the steam compressor 303 is connected to the steam heat user 305; if the high-temperature heat storage water tank 202 does not meet the flash evaporation temperature requirement, the sixth regulating water valve 209 is closed, the fourth regulating water valve 207 is closed, the fifth regulating water valve 208 is opened, the eighth water pump 206 is started, the high-temperature heat pump 201 is started, the seventh regulating water valve 307 is opened, the eighth regulating water valve 308 is closed, the ninth regulating water valve 309 is closed, the eleventh regulating water valve 311 is closed, the steam compressor 303 is started, the tenth regulating water valve 310 is opened, the steam outlet of the first flash evaporation tank 301 is connected to the steam compressor 303 through a steam pipeline, and the steam outlet of the steam compressor 303 is connected to the steam heat user 305.

[0055] The cold storage water tank 102, the heat storage water tank 104, the high-temperature heat storage water tank 202, and the steam storage device 304 all have a temperature boundary range, and when the actual temperature exceeds the boundary temperature, the heat / cold in the heat / cold storage device needs to be released through other ways.

[0056] In summary, the cold-heat four-generation system uses heat, and the final heat is stored in the heat storage water tank 104, the high-temperature heat storage water tank 202, and the steam storage device 304, and the storage location is related to the temperature grade required by the system. Specifically, when the highest required temperature is 30-80°C, the heat is stored in the heat storage water tank 104; when the highest required temperature is 80-150°C high-temperature hot water, the heat is stored in the high-temperature heat storage water tank 202; and when high-temperature steam is needed, the heat is stored in the steam storage device 304.

[0057] In the control method of the cold-heat four-in-one system, the judgment condition of whether the cold-heat integrated machine 101 and the high-temperature heat pump 201 are started is: according to whether the hot water in the heat storage water tank 104 meets the heat demand and temperature demand of the heat user 105, it is determined whether to start the cold-heat integrated machine 101; according to whether the hot water in the high-temperature heat storage water tank 202 meets the heat demand and temperature demand of the high-temperature heat user 203, it is determined whether to start the high-temperature heat pump 201 and the cold-heat integrated machine 101; according to whether the hot water in the high-temperature heat storage water tank 202 meets the flash evaporation condition of the second flash evaporation tank 302 and whether it meets the steam usage of the steam heat user 305, it is determined whether to start the high-temperature heat pump 201. Moreover, any mode needs the cold-heat integrated machine 101 to be in working state, so the cold-heat integrated machine 101 needs to be started.

[0058] It should be noted that the above only describes the preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A combined cooling, heating and power system, characterized in that, The application relates to a heat and cold supply system, which comprises: a first unit (1) for supplying cold and heat, wherein the first unit (1) comprises a cold and heat integrated machine (101); a second unit (2) for supplying high-temperature hot water, wherein the second unit (2) comprises a high-temperature heat pump (201); and a third unit (3) for supplying high-temperature steam, wherein the third unit (3) comprises a flash tank and a steam compressor (303), and a steam storage device (304) for supplying high-temperature steam to a steam heat user (305), the water inlet end of the flash tank is connected to the second unit (2) through a water pipeline, the hot water inlet and outlet pipeline of the flash tank is connected to the second unit (2), and the flashed steam is connected to the steam compressor (303) through a steam pipeline; the steam outlet of the steam compressor (303) is connected to two steam outlet pipelines, one of which is connected to the steam storage device (304), and the other is connected to the steam heat user (305); the flash tank comprises a first flash tank (301) and a second flash tank (302) which are independent of each other, the second unit (2) further comprises a high-temperature heat storage water tank (202) for supplying high-temperature hot water to a high-temperature heat user (203), the hot water outlet of the first flash tank (301) is connected to the high-temperature heat pump (201) through a pipeline, and the hot water outlet is connected to the high-temperature heat pump (201) through a water pump and a pipeline; the hot water outlet of the second flash tank (302) is connected to the high-temperature heat storage water tank (202) through a pipeline, and the hot water inlet is connected to the high-temperature heat storage water tank (202) through a water pump and a pipeline.

2. The combined cooling and heating quadricascaded system of claim 1, wherein, The first unit (1) further comprises: a cold water storage tank (102) for providing cold water to a cold user (103), wherein the cold water storage tank (102) is connected to the cold and heat integrated machine (101) through a cold water pipeline; and a heat storage water tank (104) for providing hot water to a heat user (105) and the second unit (2), wherein the hot water outlet of the cold and heat integrated machine (101) is connected to two hot water pipelines, one of which is connected to the heat storage water tank (104), and the other is connected to the second unit (2); the hot water outlet of the heat storage water tank (104) is connected to two hot water pipelines, one of which is connected to the second unit (2), and the other is connected to the cold and heat integrated machine (101) through a buffer water tank (106).

3. The combined cooling and heating quadricascaded system of claim 1, wherein, The second unit (2) further comprises a high-temperature heat storage water tank (202) for supplying high-temperature hot water to a high-temperature heat user (203), and the high-temperature heat pump (201) comprises two groups of water inlet and outlet combination ends, one group of second unit heat source water inlet and outlet pipelines is connected to the first unit (1) through a hot water pipeline; the other group of high-temperature hot water inlet and outlet pipelines is connected to two hot water pipelines, one of which is connected to the third unit (3), and the other is connected to the high-temperature heat storage water tank (202).

4. The control method of the cold-heat quadric combined supply system, applied to the cold-heat quadric combined supply system as claimed in any one of claims 1 to 3, characterized in that, By linking the cold-hot integrated machine (101), the high-temperature heat pump (201), the flash tank and the vapor compressor (303), cold water, heating, hot water and high-temperature steam are simultaneously prepared.

5. The control method of a cold heat quadric combined system according to claim 4, characterized by, The first unit (1) further comprises a cold water storage tank (102) for providing cold water for cold users (103), wherein the cold water storage tank (102) is connected to the cold-hot integrated machine (101) through a cold water pipeline; When cooling is needed, when the water temperature in the cold water storage tank (102) is greater than or equal to a first upper limit preset value, the cold-hot integrated machine (101) is started, the hot water in the cold water storage tank (102) is pumped into the cold-hot integrated machine (101), and the cold water in the cold-hot integrated machine (101) is sent into the cold water storage tank (102); when the water temperature in the cold water storage tank (102) is less than or equal to a first lower limit preset value, the cold-hot integrated machine (101) is turned off; When the water temperature in the cold water storage tank (102) meets the demand temperature, cold water is provided for the cold users (103).

6. The control method of a cold heat quadric combined system according to claim 4, wherein The first unit (1) further comprises: a cold water storage tank (102) for providing cold water for cold users (103), wherein the cold water storage tank (102) is connected to the cold-hot integrated machine (101) through a cold water pipeline; and a hot water storage tank (104) for providing hot water for hot users (105) and the second unit (2), wherein the hot water outlet of the cold-hot integrated machine (101) is connected to two hot water pipelines, one of which is connected to the hot water storage tank (104), and the other of which is connected to the second unit (2); the hot water outlet of the hot water storage tank (104) is connected to two hot water pipelines, one of which is connected to the second unit (2), and the other of which is connected to the cold-hot integrated machine (101) through a buffer tank (106); When hot water of 30-80℃ is needed, when the water temperature in the hot water storage tank (104) is less than or equal to a second lower limit preset value, the cold-hot integrated machine (101) is started, the cold water in the hot water storage tank (104) is pumped into the cold-hot integrated machine (101), the cold water generated on the evaporator side of the cold-hot integrated machine (101) is stored in the cold water storage tank (102), and the hot water in the cold-hot integrated machine (101) is sent into the hot water storage tank (104); when the water temperature in the hot water storage tank (104) is greater than or equal to a second upper limit preset value, the cold-hot integrated machine (101) is turned off; When the water temperature in the hot water storage tank (104) meets the demand temperature, hot water is provided for the hot users (105).

7. The control method of a cold heat quadric combined system according to claim 4, wherein The first unit (1) further comprises a heat storage water tank (104) for providing hot water for a hot water user (105) and the second unit (2), and a hot water outlet of the cold and hot all-in-one machine (101) is connected to two hot water pipelines, one of which is connected to the heat storage water tank (104), and the other is connected to the second unit (2); a hot water outlet of the heat storage water tank (104) is connected to two hot water pipelines, one of which is connected to the second unit (2), and the other is connected to the cold and hot all-in-one machine (101) through a buffer water tank (106); When high-temperature hot water of 80-150℃ is needed, when the water temperature in the high-temperature heat storage water tank (202) is ≤ the third lower limit preset value, the hot water pipeline connected to the third unit (3) of the high-temperature heat pump (201) is turned off, if the water temperature in the heat storage water tank (104) is ≥ the operating temperature of the evaporation side of the high-temperature heat pump (201), the hot water pipeline connected to the buffer water tank (106) of the hot water outlet of the heat storage water tank (104) is turned off, and the hot water in the heat storage water tank (104) enters the high-temperature heat pump (201); if the water temperature in the heat storage water tank (104) is ≤ the operating temperature of the evaporation side of the high-temperature heat pump (201), the cold and hot all-in-one machine (101) is started, and the cold and hot all-in-one machine (101) sends hot water to the high-temperature heat pump (201); when the water temperature in the high-temperature heat storage water tank (202) is ≥ the third upper limit preset value, the high-temperature heat pump (201) is turned off; When the water temperature in the high-temperature heat storage water tank (202) meets the demand temperature, high-temperature hot water is provided for a high-temperature hot water user (203).

8. The control method of a cold heat quadric combined system according to claim 4, wherein, When high-temperature steam needs to be generated, when the temperature in the steam storage device (304) is ≤ the fourth lower limit preset value, if the high-temperature heat storage water tank (202) meets the flash evaporation requirement, the steam compressor (303) is started, a steam outlet of the second flash tank (302) is connected to the steam compressor (303) through a steam pipeline, and a steam outlet of the steam compressor (303) is connected to a steam hot water user (305); if the high-temperature heat storage water tank (202) does not meet the flash evaporation temperature requirement, the high-temperature heat pump (201) is started, a steam outlet of the first flash tank (301) is connected to the steam compressor (303) through a steam pipeline, and a steam outlet of the steam compressor (303) is connected to the steam hot water user (305).

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