Cold and heat source device for semi-closed greenhouse temperature control system

Abstract

The invention discloses a cold and heat source device for a semi-closed greenhouse temperature control system, and relates to the technical field of greenhouse temperature control, the cold and heat source device comprises a heat recovery water chilling unit module, a cooling tower, a cold source side, a heat source side, pipelines connecting all the parts and electric valves V1-V8, the electric valves V1-V3 are used for controlling the cold source side, and the electric valves V4-V8 are used for controlling the heat source side. The cold source side comprises a cold storage tank, a cold source side water distributing and collecting device, a cold source side plate type heat exchange unit, a cold source secondary side water distributing and collecting device, a cold source secondary side plate type heat exchange unit and a cold using end. In transition seasons and when the cold source side evaporator conducts refrigeration, redundant cold energy can be stored in the cold storage tank while the cold end for the greenhouse is refrigerated, and only the cold storage tank can be used for cooling the cold end for the greenhouse when the cold energy requirement is not high, so that efficient utilization of energy is achieved, and waste of the energy is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of greenhouse temperature control, and in particular to a cold and hot source device for a temperature control system of a semi-enclosed greenhouse. Background Art

[0002] Facility agriculture represented by "semi-closed greenhouses" has huge market potential in our country. It is undoubtedly a good choice for China, which is facing "agricultural labor shortage and agricultural modernization transformation."

[0003] However, the current cold and heat source devices used in the temperature control system of semi-enclosed greenhouses are not perfect. Generally, refrigeration is used alone for cooling, or heating is provided by a single heat source. In other words, the current cold and heat source devices can only achieve single heating or cooling. When cooling, the heat generated by the refrigeration unit cannot be effectively used or stored, resulting in great waste; when heating, because it is necessary to consider the temperature control of the greenhouse under extreme weather, the heat supply requirement for a single heat source is high, so the parameters for the selection of heating units or boilers are large, resulting in high initial investment costs. In addition, the single heating or cooling mode has poor ability to cope with environmental changes, and cannot be regulated on demand. The regulation of greenhouse temperature and humidity is not accurate enough, and there are problems such as poor energy efficiency, high operating costs, and inability to achieve hot and cold regulation in multiple modes. Summary of the invention

[0004] The purpose of this application is to provide a cold and heat source device for a semi-enclosed greenhouse temperature control system, so as to solve the problem that the cold and heat source device for a semi-enclosed greenhouse temperature control system proposed in the above background technology is not perfect, has poor energy efficiency, high operating costs, and cannot achieve cold and heat regulation in multiple modes.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a cold and hot source device for a semi-enclosed greenhouse temperature control system, comprising a heat recovery chiller module, a cooling tower, a cold source side, a hot source side, pipes connecting the various parts, and electric valves V1-V8, wherein the electric valves V1-V3 are used for controlling the cold source side, and the electric valves V4-V8 are used for controlling the hot source side;

[0006] The cold source side includes a cold storage tank, a cold source side manifold, a cold source side plate heat exchanger unit and a cold end, and the cold source side manifold is composed of a cold source side manifold and a cold source side manifold;

[0007] The heat source side includes a heat storage tank, a heat source side manifold, a heat source side plate heat exchanger, a boiler, a municipal heating plate heat exchanger and a heat-using end. The heat source side manifold consists of a heat source side manifold and a heat source side manifold.

[0008] Furthermore, the cold source side also includes a cold source secondary side manifold and a cold source secondary side plate heat exchanger unit, and the cold source secondary side manifold is composed of a cold source secondary side manifold and a cold source secondary side manifold.

[0009] Furthermore, the electric valve V1 is installed on the pipeline connecting the heat recovery chiller module and the cold source side manifold.

[0010] Furthermore, the electric valves V2 and V3 are both installed on the pipeline connecting the heat recovery chiller module and the cold storage tank.

[0011] Furthermore, the electric valves V4 and V6 are both installed on the pipeline connecting the heat recovery chiller module and the heat storage tank.

[0012] Furthermore, the electric valve V5 is installed on the pipeline connecting the heat recovery chiller module and the heat source side manifold.

[0013] Furthermore, the electric valve V7 is installed on the pipeline connecting the manifold on the heat source side and the boiler.

[0014] Furthermore, the electric valve V8 is installed on the pipeline connecting the boiler and the plate heat exchanger unit for municipal heating.

[0015] In summary, the technical effects and advantages of the present invention are as follows:

[0016] 1. In the present invention, in the transition season, when the evaporator on the cold source side is refrigerating, the excess cold can be stored in the cold storage tank while refrigerating the cold end of the greenhouse. When the demand for cold is not high, only the cold storage tank can be used to cool the cold end of the greenhouse, thereby realizing efficient energy utilization and reducing energy waste.

[0017] 2. In the present invention, under high temperature conditions in summer, the heat recovery chiller module and the cold storage tank can simultaneously provide cold end refrigeration for the greenhouse, and dynamically adjust the cooling capacity through the electric valve to achieve effective control of the temperature and humidity of the cold end under extremely high temperature weather, thereby ensuring a suitable growth environment for crops and increasing crop yields.

[0018] 3. In the present invention, while the heat recovery chiller module is cooling, the heat source side plate heat exchanger can heat the hot end of the greenhouse. If there is no demand on the hot end, the generated heat can be stored in the heat storage tank. When there is a heating demand on the hot side of the greenhouse, the heat storage tank can be used for heating first, thereby realizing the cross-time utilization of energy.

[0019] 4. In the present invention, in the severe cold environment of winter, the boiler on the heat source side and the heat storage tank can be combined to generate heat to achieve effective control of the temperature at the heat-using end. If there is municipal heating and waste heat from power plants, heating can be achieved through a plate heat exchanger unit for municipal heating to reduce energy costs.

[0020] 5. In the present invention, while the heat recovery chiller module is heating, the cold end of the greenhouse can be cooled through the evaporator. If there is no demand for the cold end, the generated cold energy can be stored in the cold storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below.

[0022] Figure 1 This is an overall schematic diagram of a cold and hot source device for a semi-enclosed greenhouse temperature control system in an embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the connection relationship between the heat recovery chiller module, the cooling tower, and the heat source side in the embodiment of the present application;

[0024] Figure 3 This is a schematic diagram of the connection relationship between the heat recovery chiller module, cooling tower, and cold source side in the embodiment of the present application.

[0025] In the figure: 1. Heat recovery chiller module; 2. Cooling tower; 3. Cold source side; 301. Cold storage tank; 302. Cold source side manifold; 303. Cold source side plate heat exchanger; 304. Cold source secondary side manifold; 305. Cold source secondary side plate heat exchanger; 306. Cold end; 4. Heat source side; 401. Heat storage tank; 402. Heat source side manifold; 403. Heat source side plate heat exchanger; 404. Boiler; 405. Municipal heating plate heat exchanger; 406. Hot end. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Example: Reference Figure 1-3 The cold and heat source device shown in the figure is used for the temperature control system of a semi-closed greenhouse, including a heat recovery chiller module 1, a cooling tower 2, a cold source side 3, a heat source side 4, pipes connecting the various parts and electric valves V1-V8. The electric valves V1-V3 are used to control the cold source side 3, and the electric valves V4-V8 are used to control the heat source side 4. By adjusting the opening and closing of the electric valves V1-V8 on the pipeline, different working modes are executed to achieve temperature and humidity control and cold and heat energy storage.

[0028] The cooling tower 2 can be an open cooling tower or a closed cooling tower according to the needs, and the operation mode of the cooling tower 2; if an open cooling tower is selected, a plate heat exchanger can be added between the heat recovery chiller module 1 and the cooling tower 2 for heat exchange. The cooling tower 2 and the heat recovery chiller module 1 can be combined in a one-to-one manner, or multiple cooling towers 2 and multiple heat recovery chiller modules 1 can be connected by a mother pipe.

[0029] The heat recovery chiller module 1 is an integrated cold and heat source room, which consists of an external protective structure, a heat recovery chiller, a heat recovery circulation pump, a cooling water circulation pump, a chilled water circulation pump, a filter, valves, instruments, sensors, pipelines, equipment distribution boxes and control boxes; the heat recovery chiller can be selected according to demand, and the heat recovery chiller can be a high-pressure unit or a normal-pressure unit; the external protective structure can also be adjusted according to the equipment selection and pipeline layout, and doors and inspection windows can be set according to operation and maintenance needs; it can be shipped as a whole, convenient for transportation, hoisted and placed on site, connected to the water pipe interface and power distribution, and put into use, truly realizing plug and play.

[0030] The cold source side 3 includes a cold storage tank 301, a cold source side manifold 302, a cold source side plate heat exchanger 303 and a cold end 306. The cold source side manifold 302 is composed of a cold source side manifold and a cold source side manifold. The electric valve V1 is installed on the pipe connecting the heat recovery chiller module 1 and the cold source side manifold 302. The electric valves V2 and V3 are both installed on the pipe connecting the heat recovery chiller module 1 and the cold storage tank 301.

[0031] The heat source side 4 includes a heat storage tank 401, a heat source side manifold 402, a heat source side plate heat exchanger 403, a boiler 404, a municipal heating plate heat exchanger 405 and a heat-using end 406. The heat source side manifold 402 is composed of a heat source side manifold and a heat source side manifold. The electric valve V5 is installed on the pipeline connecting the heat recovery chiller module 1 and the heat source side manifold 402, the electric valve V7 is installed on the pipeline connecting the heat source side manifold 402 and the boiler 404, and the electric valve V8 is installed on the pipeline connecting the boiler 404 and the municipal heating plate heat exchanger 405.

[0032] The heat source side 4 of the heat recovery chiller is combined with the heat storage tank 401, the boiler 404, the plate heat exchanger 405 for municipal heating, and the heat source side manifold 402, and the cold source side 3 is combined with the cold storage tank 301, the cold source side plate heat exchanger 303 and the cold source side manifold 302. By adjusting the opening, closing and opening degree of the valves on the pipeline, different working modes can be adjusted to achieve temperature and humidity control of the semi-enclosed greenhouse.

[0033] The cold source side 3 also includes a cold source secondary side manifold 304 and a cold source secondary side plate heat exchanger unit 305. The cold source secondary side manifold 304 is composed of a cold source secondary side manifold and a cold source secondary side manifold. The cold source secondary side device can be selected according to the needs of the user's cold end, that is, the cold source side can be directly connected to the user's cold end, or a secondary side circulation can be added.

[0034] When the present invention is implemented, the number of heat recovery chiller modules 1 and cooling towers 2 in the device can be increased or decreased according to demand, and the increase or decrease in number does not affect the various working modes of the system; the plate heat exchanger unit can be replaced by a circulating water pump, a plate heat exchanger and a filter, an instrument, a valve, a pipeline and a control power supply and a sensor combination.

[0035] The water pumps in the plate heat exchanger unit and the heat recovery chiller module 1 can be variable frequency water pumps or fixed frequency water pumps, and the number can be one or more, and a standby pump can be set; it can be adjusted according to different operating requirements of users.

[0036] The power supply of the device of the present invention can be centralized power supply, that is, an integrated module is set for power supply, or decentralized power supply can be used to meet the power demand of the system.

[0037] The cold storage tank 301 and the heat storage tank 401 can store energy using water or other media.

[0038] The direct heat supply and heat storage method of the heat recovery chiller in the device of the present invention can be replaced by a heat supply and heat storage method combining a heat recovery chiller with a heat recovery hydraulic module.

[0039] The working mode of the present invention is as follows:

[0040] Working mode 1 on the cold source side: cold storage tank 301 cold storage mode; in this mode, the heat recovery chiller module 1 and the cold storage tank 301 work, the electric valves V1-V3 are opened, the cold source side plate heat exchanger 303 and the cold source secondary side plate heat exchanger 305 do not work, and the cold source side manifold 302 and the cold source secondary side manifold 304 stop running;

[0041] In this mode, the cold end 306 is not used for cooling, and the water source passes through the heat recovery chiller module 1. The electric valves V1 and V2 are opened, and the water is collected and enters the cold storage tank 301 through the electric valve V3, and then returns to the heat recovery chiller module 1 through the pipeline, forming a cycle;

[0042] In this mode, the circulating water passes through the heat recovery chiller module 1, and the 6°C chilled water enters the cold storage tank 301 to complete the cold storage.

[0043] Cold source side working mode 2: cold storage tank 301 cooling mode; in this mode, the heat recovery chiller module 1 does not work, the cold storage tank 301, the cold source side plate heat exchanger 303 and the cold source secondary side plate heat exchanger 305 work, and the cold source side manifold 302 and the cold source secondary side manifold 304 operate;

[0044] In this mode, the cold end 306 is used for cooling, the cold storage tank 301 is cooled, the electric valve V3 is opened, and the chilled water supply passes through the cold source side plate heat exchanger 303, completes heat exchange with the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305, and returns to the cold storage tank 301. The return pipes of the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305 enter the cold source secondary side plate heat exchanger 305 after being cooled by heat exchange. The chilled water return water of the cold end 306 completes heat exchange with the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305, and enters the chilled water supply pipe of the cold end 306 to achieve cooling by the cold end 306.

[0045] In this mode, the heat recovery chiller module 1 does not work, the electric valves V1 and V2 are closed, and the electric valve V3 is opened;

[0046] In this mode, the circulating water on the cold source side 3 passes through the cold storage tank 301, the electric valve V3, the cold source side water distributor, the cold source side plate heat exchanger 303 and the cold source side water collector in sequence, and then returns to the cold storage tank 301 to complete a cycle; the circulating water that has completed the heat exchange in the cold source secondary side water distributor 304 and the cold source secondary side plate heat exchanger 305 enters the cold source secondary side water distributor, and returns to the cold source secondary side water collector from the cold source secondary side water distributor through the cold source secondary side plate heat exchanger 305 to complete the secondary cycle;

[0047] In this mode, the cold stored in the cold storage tank 301 is released through the cold source side 3 and the cold source secondary side plate heat exchanger unit 305 to exchange heat with the circulating water at the cold end 306.

[0048] Cold source side working mode three: evaporator cooling mode; in this mode, the cold storage tank 301 does not work, the cold source side plate heat exchanger unit 303 and the cold source secondary side plate heat exchanger unit 305 work, and the cold source side manifold 302 and the cold source secondary side manifold 304 operate;

[0049] In this mode, the cold end 306 is used for cooling, the heat recovery chiller module 1 is running, the electric valves V1 and V2 are opened, and the chilled water passes through the cold source side plate heat exchanger 303, completes heat exchange with the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305, and returns to the heat recovery chiller module 1; the return water pipes of the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305 enter the cold source secondary side plate heat exchanger 305 after being cooled by heat exchange, and the chilled water return water of the cold end 306 completes heat exchange with the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305, and enters the chilled water supply pipe of the cold end 306, so as to realize cooling by the cold end 306;

[0050] In this mode, the cold storage tank 301 does not work, the electric valves V1 and V2 are opened, and the electric valve V3 is closed;

[0051] In this mode, the circulating water on the cold source side 3 passes through the heat recovery chiller module 1, the electric valves V1 and V2, the cold source side water distributor, the cold source side plate heat exchanger 303 and the cold source side water collector, and then returns to the heat recovery chiller module 1 to complete a cycle; the circulating water that has completed the heat exchange in the cold source secondary side water distributor 304 and the cold source secondary side plate heat exchanger 305 enters the cold source secondary side water distributor, passes through the cold source secondary side plate heat exchanger 305 from the cold source secondary side water distributor, and returns to the cold source secondary side water collector to complete a secondary cycle;

[0052] In this mode, the circulating water passes through the heat recovery chiller module 1, and 6°C chilled water is output, which exchanges heat with the circulating water at the cold end 306 through the cold source side 3 and the cold source secondary side plate heat exchanger unit 305.

[0053] Cold source side working mode 4: evaporator cooling and cold storage mode; in this mode, the heat recovery chiller module 1 and the cold storage tank 301 work, the cold source side plate heat exchanger 303 and the cold source secondary side plate heat exchanger 305 work, and the cold source side manifold 302 and the cold source secondary side manifold 304 operate;

[0054] In this mode, the cold end 306 is used for cooling, the heat recovery chiller module 1 is running, the electric valves V1 and V2 are opened, and the chilled water passes through the cold source side plate heat exchanger 303, completes heat exchange with the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305, and returns to the heat recovery chiller module 1; the return water pipes of the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305 enter the cold source secondary side plate heat exchanger 305 after being cooled by heat exchange, and the chilled water return water of the cold end 306 completes heat exchange with the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305, and enters the chilled water supply pipe of the cold end 306; at the same time, the opening of the electric valve V3 is adjusted to store the excess cold in the cold storage tank 301, so as to realize cooling by the cold end 306 and cold storage in the cold storage tank 301;

[0055] In this mode, the heat recovery chiller module 1 and the cold storage tank 301 work, the electric valves V1 and V2 are opened, and the electric valve V3 is adjusted;

[0056] In this mode, the circulating water passes through the heat recovery chiller module 1, and 6°C chilled water is output. It exchanges heat with the circulating water at the cold end 306 through the cold source side 3 and the cold source secondary side plate heat exchanger 305, and the excess cold is stored in the cold storage tank 301.

[0057] Cold source side working mode five: evaporator refrigeration and cold storage tank 301 cooling mode; in this mode, the heat recovery chiller module 1 and the cold storage tank 301 work, the cold source side plate heat exchanger unit 303 and the cold source secondary side plate heat exchanger unit 305 work, and the cold source side manifold 302 and the cold source secondary side manifold 304 operate;

[0058] In this mode, the cold end 306 is used for cooling, the heat recovery chiller module 1 is running, the electric valves V1 and V2 are opened, and at the same time, the opening of the electric valve V3 is adjusted according to the demand of the cold end 306, the cold storage tank 301 is cooled, and the chilled water passes through the cold source side plate heat exchanger 303, completes heat exchange with the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305, and returns to the heat recovery chiller module 1; the return water pipes of the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305 enter the cold source secondary side plate heat exchanger 305 after being cooled by heat exchange, and the chilled water return water of the cold end 306 completes heat exchange with the cold source secondary side manifold 304 and the cold source secondary side plate heat exchanger 305, and enters the chilled water supply pipe of the cold end 306;

[0059] In this mode, the circulating water on the cold source side 3 passes through the heat recovery chiller module 1, electric valves V1 and V2, cold storage tank 301, electric valve V3, cold source side water distributor, cold source side plate heat exchanger 303 and cold source side water collector, and then returns to the heat recovery chiller module 1 and cold storage tank 301 to complete one cycle; the circulating water that completes the heat exchange in the cold source secondary side water distributor 304 and the cold source secondary side plate heat exchanger 305 enters the cold source secondary side water distributor, passes through the cold source secondary side plate heat exchanger 305 from the cold source secondary side water distributor, and returns to the cold source secondary side water collector to complete the secondary cycle.

[0060] Working mode 1 on the heat source side: heat recovery and heat storage mode; in this mode, the heat recovery chiller module 1 and the heat storage tank 401 work, the electric valves V4-V6 are open, the heat source side plate heat exchanger 403, the boiler 404, the heat source side manifold 402, and the municipal heating plate heat exchanger 405 do not work, and the electric valves V7 and V8 are closed;

[0061] In this mode, the hot end 406 does not generate heat, and the water source passes through the heat recovery chiller module 1. The electric valves V4 and V5 are opened, and the water is collected and enters the heat storage tank 401 through the electric valve V6, and then returns to the heat recovery chiller module 1 through the pipeline, forming a cycle;

[0062] In this mode, the circulating water passes through the heat recovery chiller module 1, and the 37°C hot water enters the heat storage tank 401 to complete the heat storage.

[0063] Working mode 2 on the heat source side: heat storage tank 401 heat release mode; in this mode, the heat recovery chiller module 1 does not work, the heat storage tank 401, the heat source side manifold 402, and the heat source side plate heat exchanger 403 work, and the boiler 404 and the municipal heating plate heat exchanger 405 do not work;

[0064] In this mode, the hot end 406 is used for heating, the heat storage tank 401 releases heat, the electric valve V6 is opened, and the hot water supply passes through the heat source side plate heat exchanger unit 403, completes heat exchange with the hot end 406, and returns to the heat storage tank 401; the hot water return water of the hot end 406 completes heat exchange with the heat source side 4, enters the hot water supply pipe of the hot end 406, and realizes heating of the hot end 406;

[0065] In this mode, the heat recovery chiller module 1 does not work, the electric valves V4 and V5 are closed, and the electric valve V6 is opened;

[0066] In this mode, the circulating water on the heat source side 4 passes through the heat storage tank 401, the electric valve V6, the heat source side water distributor, the heat source side plate heat exchanger unit 403 and the heat source side water collector in sequence, and then returns to the heat storage tank 401 to complete the cycle;

[0067] In this mode, the heat stored in the heat storage tank 401 is released through the heat source side 4 to exchange heat with the circulating water at the hot end 406.

[0068] Working mode three on the heat source side: heat recovery heating mode; in this mode, the heat storage tank 401, the boiler 404, and the plate heat exchanger unit 405 for municipal heating do not work, the plate heat exchanger unit 403 on the heat source side works, and the manifold 402 on the heat source side operates;

[0069] In this mode, the hot end 406 is used for heating, the heat recovery chiller module 1 is running, the electric valves V4 and V5 are opened, and the hot water output passes through the heat source side plate heat exchanger 403, completes heat exchange with the hot end 406, and returns to the heat recovery chiller module 1; the hot water return water of the hot end 406 completes heat exchange with the heat source side 4, enters the hot water supply pipe of the hot end 406, and realizes heating of the hot end 406;

[0070] In this mode, the heat storage tank 401, the boiler 404, and the plate heat exchanger unit 405 for municipal heating do not work, the electric valves V4 and V5 are open, and the electric valves V6-V8 are closed;

[0071] In this mode, the circulating water on the heat source side 4 passes through the heat recovery chiller module 1, the electric valves V4 and V5, the heat source side water distributor, the heat source side plate heat exchanger 403 and the heat source side water collector, and then returns to the heat recovery chiller module 1 to complete the cycle;

[0072] In this mode, the circulating water passes through the heat recovery chiller module 1, outputs 37°C hot water, and exchanges heat with the circulating water at the heat end 406 through the heat source side plate heat exchanger unit 403.

[0073] Working mode 4 on the heat source side: Boiler 404 heating mode; in this mode, the boiler 404 works, the heat source side plate heat exchanger 403 works, the heat source side manifold 402 operates, and the heat recovery chiller module 1, the heat storage tank 401, and the municipal heating plate heat exchanger 405 do not work;

[0074] In this mode, the hot end 406 is used for heating, the boiler 404 is running, the electric valve V7 is opened, and the hot water passes through the heat source side plate heat exchanger unit 403, completes heat exchange with the hot end 406, and returns to the boiler 404; the hot water return water of the hot end 406 completes heat exchange with the heat source side 4, enters the hot water supply pipe of the hot end 406, and realizes heating of the hot end 406;

[0075] In this mode, the heat recovery chiller module 1, the heat storage tank 401, and the municipal heating plate heat exchanger 405 do not work, the electric valve V7 is open, and the electric valves V4, V5, V6, and V8 are closed;

[0076] In this mode, the circulating water on the heat source side 4 passes through the boiler 404, the electric valve V7, the water distributor on the heat source side, the plate heat exchanger unit 403 on the heat source side and the water collector on the heat source side, and then returns to the boiler 404 to complete the cycle;

[0077] In this mode, the circulating water passes through the boiler 404 to produce hot water, and then passes through the heat source side plate heat exchanger unit 403 to exchange heat with the circulating water at the heat end 406.

[0078] Working mode 5 on the heat source side: municipal heating mode; in this mode, the municipal heating plate heat exchanger 405 works, the heat source side plate heat exchanger 403 works, the heat source side manifold 402 operates, and the heat recovery chiller module 1, the heat storage tank 401, and the boiler 404 do not work;

[0079] In this mode, the hot end 406 is used for heating, the municipal heating plate heat exchanger 405 is running, the electric valve V8 is opened, and after heat exchange with the municipal heating, the hot water passes through the heat source side plate heat exchanger 403, completes heat exchange with the hot end 406, and then returns to the municipal heating plate heat exchanger 405; the chilled water return water of the hot end 406 completes heat exchange with the heat source side 4, enters the hot water supply pipe of the hot end 406, and realizes heating of the hot end 406;

[0080] In this mode, the heat recovery chiller module 1, the heat storage tank 401, and the boiler 404 do not work, the electric valve V8 is open, and the electric valves V4-V7 are closed;

[0081] In this mode, the circulating water on the heat source side 4 passes through the municipal heating plate heat exchanger 405, the electric valve V7, the heat source side water distributor, the heat source side plate heat exchanger 403 and the heat source side water collector, and then returns to the boiler 404 to complete the cycle;

[0082] In this mode, the circulating water passes through the plate heat exchanger unit 405 for municipal heating, outputs hot water, and then passes through the heat source side plate heat exchanger unit 403 to exchange heat with the circulating water at the heat end 406.

[0083] Working mode six on the heat source side: municipal heating heat storage mode; in this mode, the municipal heating plate heat exchanger 405 and the heat storage tank 401 work, the electric valves V6 and V8 are open, the heat recovery chiller module 1, the heat source side plate heat exchanger 403, the heat source side manifold 402 and the boiler 404 do not work, and the electric valves V4, V5, and V7 are closed;

[0084] In this mode, the hot end 406 does not generate heat, and the water source passes through the municipal heating plate heat exchanger 405, the electric valve V7 is opened, and the water enters the heat storage tank 401 through the electric valve V6, and then returns to the municipal heating plate heat exchanger 405 through the pipeline, forming a cycle;

[0085] In this mode, the circulating water passes through the plate heat exchanger unit 405 for municipal heating, completes heat exchange with the municipal heating, and the hot water enters the heat storage tank 401 to complete heat storage.

[0086] Working mode seven on the heat source side: heat recovery heating and heat storage mode; in this mode, the heat recovery chiller module 1 and the heat storage tank 401 are working, the heat source side plate heat exchanger 403 is working, the heat source side manifold 402 is running, and the municipal heating plate heat exchanger 405 and boiler 404 are not working;

[0087] In this mode, the hot end 406 is used for heating, the heat recovery chiller module 1 is running, the electric valves V4 and V5 are opened, the hot water output passes through the heat source side plate heat exchanger 403, completes heat exchange with the hot end 406, and returns to the heat recovery chiller module 1; the hot water return water of the hot end 406 completes heat exchange with the heat source side 4, enters the hot water supply pipe of the hot end 406, and realizes heating of the hot end 406; at the same time, the opening of the electric valve V6 is adjusted to store the excess heat in the heat storage tank 401, so as to realize heat storage of the heat storage tank 401;

[0088] In this mode, the heat recovery chiller module 1 and the heat storage tank 401 work, the electric valves V4 and V5 are opened, and the electric valve V6 is adjusted;

[0089] In this mode, the circulating water passes through the heat recovery chiller module 1, outputs 37°C hot water, exchanges heat with the circulating water at the hot end 406 through the heat source side 4 and the heat source side plate heat exchanger 403, and stores the excess heat in the heat storage tank 401.

[0090] Working mode eight on the heat source side: municipal heating and heat storage mode; in this mode, the municipal heating plate heat exchanger 405 and the heat storage tank 401 work, the heat source side plate heat exchanger 403 works, the heat source side manifold 402 operates, and the heat recovery chiller module 1 and the boiler 404 do not work;

[0091] In this mode, the hot end 406 is used for heating, the municipal heating plate heat exchanger 405 is running, the electric valve V8 is opened, the hot water passes through the heat source side plate heat exchanger 403, completes the heat exchange with the hot end 406, and returns to the municipal heating plate heat exchanger 405; the hot water return water of the hot end 406 completes the heat exchange with the heat source side 4, enters the hot water supply pipe of the hot end 406, and realizes the heating of the hot end 406; at the same time, the opening of the electric valve V6 is adjusted to store the excess heat in the heat storage tank 401, so as to realize the heat storage of the heat storage tank 401;

[0092] In this mode, the municipal heating plate heat exchanger unit 405 and the heat storage tank 401 work, the electric valve V7 is opened, and the electric valve V6 is adjusted;

[0093] In this mode, the circulating water passes through the municipal heating plate heat exchanger 405, exchanges heat with the municipal heating to produce hot water, passes through the heat source side 4 and the heat source side plate heat exchanger 403 to exchange heat with the circulating water at the heat end 406, and stores the excess heat in the heat storage tank 401.

[0094] Working mode nine on the heat source side: combined heating mode; any two or three of the four devices, namely, the heat recovery chiller module 1, the heat storage tank 401, the boiler 404, and the plate heat exchanger 405 for municipal heating, can be used for combined heating; in the case of extreme heat demand, all four devices can also work for combined heating; in the combined heating mode, the plate heat exchanger 403 on the heat source side and the manifold 402 on the heat source side will both operate, and the hot end 406 will be used for heating;

[0095] When the heat recovery chiller module 1 and the heat storage tank 401 are combined to provide heat, the electric valves V4, V5, and V6 are opened, and the electric valves V7 and V8 are closed. Hot water is produced by the heat recovery chiller module 1 and the heat storage tank 401, enters the heat source side 4, and exchanges heat with the heat end 406.

[0096] When the heat recovery chiller module 1 and the boiler 404 are combined to provide heat, the electric valves V4, V5, and V7 are opened, and the electric valves V6 and V8 are closed. Hot water is produced by the heat recovery chiller module 1 and the heat storage tank 401, enters the heat source side 4 and exchanges heat with the heat end 406;

[0097] When the heat recovery chiller module 1 and the municipal heating plate heat exchanger 405 are combined to provide heat, the electric valves V4, V5, and V8 are opened, and the electric valves V6 and V7 are closed. Hot water is produced by the heat recovery chiller module 1 and the municipal heating plate heat exchanger 405, enters the heat source side 4 and exchanges heat with the heat end 406;

[0098] When the heat storage tank 401 and the boiler 404 are combined to provide heat, the electric valves V6 and V7 are opened, and the electric valves V4, V5, and V8 are closed. Hot water is produced by the heat storage tank 401 and the boiler 404 and enters the heat source side 4 to exchange heat with the heat end 406.

[0099] When the heat storage tank 401 and the municipal heating plate heat exchanger 405 are combined to provide heat, the electric valves V6 and V8 are opened, and the electric valves V4, V5, and V7 are closed. Hot water is produced by the heat storage tank 401 and the municipal heating plate heat exchanger 405, enters the heat source side 4 and exchanges heat with the heat end 406;

[0100] When the municipal heating plate heat exchanger 405 and the boiler 404 are combined to provide heat, the electric valves V7 and V8 are opened, and the electric valves V4, V5, and V6 are closed. Hot water is produced by the municipal heating plate heat exchanger 405 and the boiler 404, enters the heat source side 4 and exchanges heat with the heat end 406;

[0101] When the heat recovery chiller module 1, the heat storage tank 401, and the boiler 404 jointly provide heat, the electric valves V4, V5, V6, and V7 are opened, and the electric valve V8 is closed, and hot water is produced by the heat recovery chiller module 1, the heat storage tank 401, and the boiler 404, and enters the heat source side 4 to exchange heat with the heat end 406;

[0102] When the heat recovery chiller module 1, the heat storage tank 401, and the municipal heating plate heat exchanger 405 jointly provide heat, the electric valves V4, V5, V6, and V8 are opened, and the electric valve V7 is closed, and hot water is produced by the heat recovery chiller module 1, the heat storage tank 401, and the municipal heating plate heat exchanger 405, and enters the heat source side 4 to exchange heat with the heat end 406;

[0103] When the heat recovery chiller module 1, the boiler 404, and the municipal heating plate heat exchanger 405 jointly provide heat, the electric valves V4, V5, V7, and V8 are opened, and the electric valve V6 is closed, and hot water is produced by the heat recovery chiller module 1, the boiler 404, and the municipal heating plate heat exchanger 405, and enters the heat source side 4 to exchange heat with the heat end 406;

[0104] When the heat storage tank 401, the boiler 404, and the municipal heating plate heat exchanger 405 jointly provide heat, the electric valves V6, V7, and V8 are opened, and the electric valves V4 and V5 are closed. Hot water is produced by the heat storage tank 401, the boiler 404, and the municipal heating plate heat exchanger 405, and enters the heat source side 4 to exchange heat with the heat end 406.

[0105] When the heat recovery chiller module 1, the heat storage tank 401, the boiler 404, and the municipal heating plate heat exchanger 405 jointly provide heat, the electric valves V4, V5, V6, V7, and V8 are opened, and hot water is produced by the heat storage tank 401, the boiler 404, and the municipal heating plate heat exchanger 405, and enters the heat source side 4 to exchange heat with the heat end 406;

[0106] When the heat recovery chiller module 1 operates to realize the cold source side working mode, the heat source side can perform various working modes when the heat recovery chiller module 1 is in operation, namely, heating and heat storage; it can also not perform any working mode on the heat source side, and only circulate cooling water between the condenser and the cooling tower 2; in this mode, all electric valves V4-V8 are closed, the heat source side plate heat exchanger 403, the heat source side manifold 402, the heat storage tank 401, the boiler 404, and the municipal heating plate heat exchanger 405 do not work, the water source is cooled by the cooling tower 2 and then enters the heat recovery chiller module 1, and is sent to the cooling tower 2 for cooling after being heated by the condenser, completing the cooling water cycle.

[0107] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cold and hot source device for a semi-enclosed greenhouse temperature control system, characterized in that: It comprises a heat recovery chiller module (1), a cooling tower (2), a cold source side (3), a hot source side (4), pipes connecting the various parts, and electric valves V1-V8, wherein the electric valves V1-V3 are used for controlling the cold source side (3), and the electric valves V4-V8 are used for controlling the hot source side (4); The cold source side (3) comprises a cold storage tank (301), a cold source side water distributor (302), a cold source side plate heat exchange unit (303), and a cold end (306); the cold source side water distributor (302) comprises a cold source side water distributor and a cold source side water collector; The heat source side (4) comprises a heat storage tank (401), a heat source side manifold (402), a heat source side plate heat exchanger unit (403), a boiler (404), a municipal heating plate heat exchanger unit (405), and a heat-using end (406); the heat source side manifold (402) comprises a heat source side manifold and a heat source side manifold.

2. The cold and heat source device for a semi-enclosed greenhouse temperature control system according to claim 1, characterized in that: The cold source side (3) further comprises a cold source secondary side manifold (304) and a cold source secondary side plate heat exchange unit (305); the cold source secondary side manifold (304) is composed of a cold source secondary side manifold and a cold source secondary side manifold.

3. The cold and heat source device for a semi-enclosed greenhouse temperature control system according to claim 2, characterized in that: The electric valve V1 is installed on the pipeline connecting the heat recovery chiller module (1) and the cold source side manifold (302).

4. The cold and heat source device for a semi-enclosed greenhouse temperature control system according to claim 3, characterized in that: The electric valves V2 and V3 are both installed on the pipeline connecting the heat recovery chiller module (1) and the cold storage tank (301).

5. The cold and heat source device for a semi-enclosed greenhouse temperature control system according to claim 2, characterized in that: The electric valves V4 and V6 are both installed on the pipeline connecting the heat recovery chiller module (1) and the heat storage tank (401).

6. The cold and heat source device for a semi-enclosed greenhouse temperature control system according to claim 5, characterized in that: The electric valve V5 is installed on the pipeline connecting the heat recovery chiller module (1) and the heat source side manifold (402).

7. The cold and heat source device for a semi-enclosed greenhouse temperature control system according to claim 6, characterized in that: The electric valve V7 is installed on the pipeline connecting the heat source side manifold (402) and the boiler (404).

8. The cold and heat source device for a semi-enclosed greenhouse temperature control system according to claim 7, characterized in that: The electric valve V8 is installed on the pipeline connecting the boiler (404) and the plate heat exchanger unit (405) for municipal heating.

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